AI-generatedNorrtälje at a glance
- Best time
- Jul
- Warmest month
- Jul · 23°
- Warmest sea
- Aug · 16.7°
- Sunshine a year
- 1,920 h
- Rain a year
- 553 mm
- Climate
- Maritime
- Time zone
- UTC+1 / UTC+2
- Elevation
- 13 m
Climate in Norrtälje
Norrtälje has a maritime climate with moderate summers and cool, often grey winters. July is the warmest month with average highs of 23 °C, while January is the coolest at 1 °C. With around 1,920 hours of sunshine a year, Norrtälje is moderately sunny; June is the sunniest month with 9.5 hours a day.
Holiday weather through the year
Best time to visit Norrtälje
The best time to visit Norrtälje is in July. The sea stays too cool for a classic beach holiday: even in August it only reaches 16.7 °C. For sightseeing, day trips and hiking, conditions are most comfortable from May to September. The wettest month is July with 67 mm of precipitation.
Norrtälje through the seasons
How the weather changes over the seasons, with averages for each.
Norrtälje in spring
Mar – May
Poor
- 5–16 °C by day
- Sea 4 °C
- 7.1 h of sun a day
- 23 rainy days in all
Norrtälje in summer
Jun – Aug
Fair
- 20–23 °C by day
- Sea 15 °C
- 8.8 h of sun a day
- 32 rainy days in all
Norrtälje in autumn
Sep – Nov
Poor
- 5–17 °C by day
- Sea 10 °C
- 3.4 h of sun a day
- 29 rainy days in all
Norrtälje in winter
Dec – Feb
Poor
- 1–2 °C by day
- Sea 3 °C
- 1.6 h of sun a day
- 29 rainy days in all
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May – Sep
15–28 °C and not too much rain
Snow
Nov – Mar
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Norrtälje for you.
Your best months: July – August
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Poor
Best time to visit: July
Where to go in OctoberSea temperature in October
A typical day in October
- Morning, 08:00: about 4°
- Midday, 13:00: about 10°
- Afternoon, 16:00: about 10°
- Evening, 20:00: about 7°
- Night, 23:00: about 5°
07:2117:40
Cold evenings: bring a warm jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:56–08:20 · evening 16:42–18:06
- Blue hour
- Morning 06:39–06:56 · evening 18:06–18:22
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Norrtälje compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 13° at the start of the month to 8° at the end. The sea cools from 12° to 8°. The days get 2.6 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 13° | 8° |
| Night-time low | 5° | 1° |
| Sea | 12° | 8° |
| Daylight | 11.6 h | 9.0 h |
What is the weather like in Norrtälje in October?
In October, Norrtälje is cool: daytime highs average 10 °C, and nights cool down to about 3 °C. The sea averages 10.0 °C – swimming is only for the hardy. The sun is scarce, with only about 3.1 hours a day. Rain is frequent, with about 10 rainy days and 52 mm in total. All in all, October is not an ideal month for a holiday in Norrtälje.
More details for October
- Daylight
- 10 h 19 min07:21 – 17:40
- UV index
- 1 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 70 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+2offset from UTC
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %2 %
- Few rainy daysweight 20 %59 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Norrtälje
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
July has the better holiday weather in Norrtälje: score 51 against 12. In July, days are 13 °C warmer than in October. The sea is 6 °C warmer in July. July has one more rainy day. The sun shines 6 hours longer a day in July.
| Month | October | July |
|---|---|---|
| Holiday weather score | 12 | 51better |
| Daytime high | 10° | 23° |
| Night-time low | 3° | 11° |
| Sea | 10.0° | 15.8° |
| Sunshine | 3.1 h | 9.2 hbetter |
| Rainy days | 10better | 11 |
| Rainfall | 52 mmbetter | 67 mm |
| Muggy days | 0better | 1 |
Based on the climate averages 1996–2025.
Norrtälje month by month
The typical weather for every month at a glance.
13January1° · Sea 3° · 1.3 h
In January, Norrtälje is bitterly cold: daytime highs average 1 °C, and nights often drop below freezing (−6 °C). The sea averages 2.5 °C – swimming is only for the hardy. The sun is scarce, with only about 1.3 hours a day. Precipitation falls on about 9 days, totalling 40 mm; on about 5 of them it snows. All in all, January is not an ideal month for a holiday in Norrtälje.
Norrtälje in January14February1° · Sea 1° · 2.6 h
In February, Norrtälje is bitterly cold: daytime highs average 1 °C, and nights often drop below freezing (−7 °C). The sea averages 1.4 °C – swimming is only for the hardy. The sun is scarce, with only about 2.6 hours a day. Precipitation falls on about 8 days, totalling 32 mm; on about 6 of them it snows. All in all, February is not an ideal month for a holiday in Norrtälje.
Norrtälje in February22March5° · Sea 2° · 4.8 h
In March, Norrtälje is cold: daytime highs average 5 °C, and nights often drop below freezing (−5 °C). The sea averages 1.6 °C – swimming is only for the hardy. Expect around 4.8 hours of sunshine a day. Rain falls on about 7 days, adding up to 28 mm. Snow falls on about 4 days. All in all, March is not an ideal month for a holiday in Norrtälje.
Norrtälje in March29April10° · Sea 3° · 7.3 h
In April, Norrtälje is cool: daytime highs average 10 °C, and nights often drop below freezing (−1 °C). The sea averages 3.0 °C – swimming is only for the hardy. The sun shines for around 7.3 hours a day. Rain falls on about 8 days, adding up to 30 mm. Snow falls on about 2 days. All in all, April is not an ideal month for a holiday in Norrtälje.
Norrtälje in April33May16° · Sea 6° · 9.1 h
In May, Norrtälje is cool: daytime highs average 16 °C, and nights cool down to about 4 °C. The sea averages 6.4 °C – swimming is only for the hardy. With around 9.1 hours of sunshine a day, there is plenty of sun. Rain falls on about 9 days, adding up to 40 mm. All in all, May is not an ideal month for a holiday in Norrtälje.
Norrtälje in May37June20° · Sea 11° · 9.5 h
In June, Norrtälje is mild: daytime highs average 20 °C, and nights cool down to about 8 °C. The sea averages 11.3 °C – swimming is only for the hardy. With around 9.5 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 9 rainy days and 54 mm in total. All in all, June is not an ideal month for a holiday in Norrtälje.
Norrtälje in June51July23° · Sea 16° · 9.2 h
In July, Norrtälje is warm: daytime highs average 23 °C, and nights cool down to about 11 °C. The sea averages 15.8 °C – swimming is only for the hardy. With around 9.2 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 11 rainy days and 67 mm in total. All in all, July is a so-so month for a holiday in Norrtälje – and yet one of the best months here.
Norrtälje in July40August22° · Sea 17° · 7.8 h
In August, Norrtälje is warm: daytime highs average 22 °C, and nights cool down to about 10 °C. The sea averages 16.7 °C – swimming is only for the hardy. The sun shines for around 7.8 hours a day. Rain is frequent, with about 12 rainy days and 64 mm in total. All in all, August is a so-so month for a holiday in Norrtälje.
Norrtälje in August22September17° · Sea 14° · 5.7 h
In September, Norrtälje is mild: daytime highs average 17 °C, and nights cool down to about 7 °C. The sea averages 13.9 °C – swimming is only for the hardy. Expect around 5.7 hours of sunshine a day. Rain falls on about 9 days, adding up to 48 mm. All in all, September is not an ideal month for a holiday in Norrtälje.
Norrtälje in September12October10° · Sea 10° · 3.1 h
In October, Norrtälje is cool: daytime highs average 10 °C, and nights cool down to about 3 °C. The sea averages 10.0 °C – swimming is only for the hardy. The sun is scarce, with only about 3.1 hours a day. Rain is frequent, with about 10 rainy days and 52 mm in total. All in all, October is not an ideal month for a holiday in Norrtälje.
Norrtälje in October10November5° · Sea 7° · 1.4 h
In November, Norrtälje is cold: daytime highs average 5 °C, and nights cool down to about 0 °C. The sea averages 7.0 °C – swimming is only for the hardy. The sun is scarce, with only about 1.4 hours a day. Rain is frequent, with about 11 rainy days and 50 mm in total. Snow falls on about 3 days. All in all, November is not an ideal month for a holiday in Norrtälje.
Norrtälje in November9December2° · Sea 4° · 1.0 h
In December, Norrtälje is bitterly cold: daytime highs average 2 °C, and nights often drop below freezing (−4 °C). The sea averages 4.4 °C – swimming is only for the hardy. The sun is scarce, with only about 1.0 hours a day. Precipitation falls on about 12 days, totalling 48 mm; on about 5 of them it snows. All in all, December is not an ideal month for a holiday in Norrtälje.
Norrtälje in DecemberClimate in detail
Year & climate tableWarmest in July: 23°
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Norrtälje
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
ColdOctober: nights around 3°. The room should be heated.
The coolest nights are in February (−7°), the warmest in July (11°). Nights fall below 8 °C on average from September to May, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 13 | 1° | −6° | 2.5° | 1.3 h | 9 | 40 |
| FebruaryFeb | 14 | 1° | −7° | 1.4° | 2.6 h | 8 | 32 |
| MarchMar | 22 | 5° | −5° | 1.6° | 4.8 h | 7 | 28 |
| AprilApr | 29 | 10° | −1° | 3.0° | 7.3 h | 8 | 30 |
| MayMay | 33 | 16° | 4° | 6.4° | 9.1 h | 9 | 40 |
| JuneJun | 37 | 20° | 8° | 11.3° | 9.5 h | 9 | 54 |
| JulyJul | 51 | 23° | 11° | 15.8° | 9.2 h | 11 | 67 |
| AugustAug | 40 | 22° | 10° | 16.7° | 7.8 h | 12 | 64 |
| SeptemberSep | 22 | 17° | 7° | 13.9° | 5.7 h | 9 | 48 |
| OctoberOct | 12 | 10° | 3° | 10.0° | 3.1 h | 10 | 52 |
| NovemberNov | 10 | 5° | 0° | 7.0° | 1.4 h | 11 | 50 |
| DecemberDec | 9 | 2° | −4° | 4.4° | 1.0 h | 12 | 48 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
59.76° N, 18.70° E · 13 m · Europe/Stockholm
Sea temperatureUp to 17° in August
Sea temperature in Norrtälje
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 9.1 – 11.1 °C
Swimming season: Always below 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Norrtälje ranges from 1.4 °C in February to 16.7 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
The sea warms up slowly: it is warmest in August, while the air already peaks in July. From November to February the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 15.4 and 17.9 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 2.5° | 0.9° | 4.0° | cold |
| FebruaryFeb | 1.4° | 0.0° | 2.3° | cold |
| MarchMar | 1.6° | 0.3° | 2.7° | cold |
| AprilApr | 3.0° | 1.8° | 4.1° | cold |
| MayMay | 6.4° | 5.3° | 7.1° | cold |
| JuneJun | 11.3° | 9.8° | 13.3° | cold |
| JulyJul | 15.8° | 14.4° | 16.9° | cold |
| AugustAug | 16.7° | 15.4° | 17.9° | cold |
| SeptemberSep | 13.9° | 12.9° | 15.0° | cold |
| OctoberOct | 10.0° | 9.1° | 11.1° | cold |
| NovemberNov | 7.0° | 6.2° | 8.0° | cold |
| DecemberDec | 4.4° | 3.2° | 5.5° | cold |
Sunshine1,920 hours a year
Sunshine hours in Norrtälje
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 3.1 of 10.3 hours of daylight in Norrtälje, 30 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain553 mm a year, most in July
Rain in Norrtälje: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Norrtälje has about 10 rainy days with 52 mm of rain in total.
UV indexUp to 6 in June
UV index in Norrtälje
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 1 · lowLittle protection needed; sunglasses on bright days.
The sun is strongest in June (UV 6).
Minutes until sunburn in October
- Very fair skin
- over 2 h
- Fair skin
- over 2 h
- Light brown skin
- over 2 h
- Olive skin
- over 2 h
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind & cloudsWindiest in January: 23 km/h
Wind and clouds in Norrtälje
How breezy and how cloudy Norrtälje is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Norrtälje typically peaks at 21 km/h during the day: Beaufort 4, moderate breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting: Sep – Apr.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 70 % of the sky over Norrtälje: mostly cloudy, with about 3.1 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
SnowChance of snow up to 70% in February
Snow in Norrtälje
When Norrtälje is likely to be white: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, it hardly ever snows in Norrtälje.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Planning a trip to Norrtälje
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Norrtälje in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Norrtälje has its best school-holiday weather during the summer holidays (score 44) and its weakest during the Christmas holidays (score 11).
- 27
Easter holidays
Mar – Apr
Poor
- 8 °C by day
- Sea 3 °C
- 6.5 h of sun a day
- 7 rainy days a month
Keep in mind: Snow
- 34
May half-term
May – Jun
Poor
- 16 °C by day
- Sea 7 °C
- 9.2 h of sun a day
- 9 rainy days a month
Good for: Sightseeing & walks
- 44
Summer holidays
Jul – Aug
FairBest holidays
- 22 °C by day
- Sea 16 °C
- 8.3 h of sun a day
- 11 rainy days a month
Good for: Sightseeing & walks
- 12
October half-term
Oct
Poor
- 10 °C by day
- Sea 10 °C
- 3.1 h of sun a day
- 10 rainy days a month
- 11
Christmas holidays
Dec – Jan
Poor
- 1 °C by day
- Sea 3 °C
- 1.2 h of sun a day
- 10 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 2 h 20 min
- Distance
- 1,510 km
- Time zone
- UTC+2
- Jet lag
- Hardly any (under 3 h)
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Good to know: Sweden
- Currency
- Swedish Krona (SEK)
- Language
- Swedish
- Sockets
- Type C, F · 230 V
- Traffic
- Drives on the right
- Dialling code
- +46
- Emergency number
- 112
UK plugs need a travel adapter
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Compare & alternatives
Compare with another place
Norrtälje compared
Put Norrtälje side by side with another destination.
Norrtälje vs Vaxholm
In October the holiday weather in Norrtälje and Vaxholm is about equally good (score 12 vs 10). During the day Vaxholm is 1 °C warmer than Norrtälje. The sea is about equally warm.
| in October | Norrtälje | Vaxholm |
|---|---|---|
| Holiday weather score | 12 | 10 |
| Daytime high | 10° | 11° |
| Sea | 10° | 10° |
| Sunshine | 3 h | 3 h |
| Rainy days | 10 | 11 |
| Best time | Jul | Jul |
Through the year
Best places in the country
Sweden in October: the best places
In October, Norrtälje ranks 20 among the 31 nearest destinations in this country.
- Sigtuna10°31
- 2Mariefred11°31
- 3Linköping11°30
- 4Uppsala10°29
- 5Katrineholm11°29
- 6Kumla11°29
- 7Stockholm11°10°28
- 8Eskilstuna10°28
- 20NorrtäljeThis page10°10°12
Places nearby4 places within 61 km
Near Norrtälje
Other destinations close by.
Places with a similar climatee.g. Söderhamn and Kuressaare
Places with a climate like Norrtälje
Destinations whose weather through the year is closest to Norrtälje's – good alternatives.
Frequently asked questions about Norrtälje
When is the best time to visit Norrtälje?
The best time to visit Norrtälje is in July. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Norrtälje?
The sea temperature in Norrtälje ranges from 1.4 °C in February to 16.7 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Norrtälje in October?
Only if you don't mind cold water: in October the sea averages just 10.0 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Norrtälje?
July is the warmest month, with average highs of 23 °C and nights around 11 °C. January is the coolest month at 1 °C.
When does it rain most in Norrtälje?
The wettest month is July with 67 mm of precipitation. The driest month is March with 28 mm.
How many hours of sunshine does Norrtälje get?
Norrtälje gets around 1,920 hours of sunshine a year. The sunniest month is June with 9.5 hours a day; in December there are 1.0 hours a day.
What time zone is Norrtälje in?
Norrtälje is on UTC+1 in January and UTC+2 in July.
How long is the flight from London to Norrtälje?
A nonstop flight from London to Norrtälje takes about 2 h 20 min, for a straight-line distance of about 1,510 km.
Which school holidays are best for Norrtälje?
Norrtälje has its best school-holiday weather during the summer holidays (score 44) and its weakest during the Christmas holidays (score 11). Holiday ratings (0–100): Easter holidays 27, May half-term 34, summer holidays 44, October half-term 12, Christmas holidays 11.