AI-generatedGrantham at a glance
- Best time
- May – Sep
- Warmest month
- Jul · 22°
- Sunshine a year
- 1,590 h
- Rain a year
- 672 mm
- Climate
- Maritime
- Time zone
- UTC+0 / UTC+1
- Elevation
- 64 m
Climate in Grantham
Grantham has a maritime climate with moderate summers and cool, often grey winters. July is the warmest month with average highs of 22 °C, while January is the coolest at 7 °C. With around 1,590 hours of sunshine a year, Grantham is rather dull; May is the sunniest month with 6.5 hours a day.
Holiday weather through the year
Best time to visit Grantham
The best time to visit Grantham is from May to September. For sightseeing, day trips and hiking, conditions are most comfortable from May to September. The wettest month is July with 66 mm of precipitation.
Grantham through the seasons
How the weather changes over the seasons, with averages for each.
Grantham in spring
Mar – May
Fair
- 11–17 °C by day
- 5.3 h of sun a day
- 32 rainy days in all
Grantham in summer
Jun – Aug
Good
- 20–22 °C by day
- 6.2 h of sun a day
- 34 rainy days in all
Grantham in autumn
Sep – Nov
Fair
- 10–19 °C by day
- 3.5 h of sun a day
- 32 rainy days in all
Grantham in winter
Dec – Feb
Poor
- 7–8 °C by day
- 2.3 h of sun a day
- 32 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May – Sep
15–28 °C and not too much rain
Find your perfect month
Tell us what you like and we rate every month in Grantham 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
Fair
Best time to visit: May – September
A typical day in October
- Morning, 08:00: about 8°
- Midday, 13:00: about 14°
- Afternoon, 16:00: about 14°
- Evening, 20:00: about 11°
- Night, 23:00: about 10°
07:2718:10
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 07:05–08:14 · evening 17:22–18:31
- Blue hour
- Morning 06:52–07:05 · evening 18:31–18:45
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 Grantham compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 17° at the start of the month to 12° at the end. The days get 2.0 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 17° | 12° |
| Night-time low | 9° | 6° |
| Daylight | 11.7 h | 9.7 h |
What is the weather like in Grantham in October?
In October, Grantham is cool: daytime highs average 15 °C, and nights cool down to about 7 °C. The sun is scarce, with only about 3.4 hours a day. Rain is frequent, with about 12 rainy days and 66 mm in total. All in all, October is a so-so month for a holiday in Grantham.
More details for October
- Daylight
- 10 h 43 min07:27 – 18:10
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 24 km/haverage daily peakAll months
- Cloud cover
- 72 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+1offset from UTC
How the score comes together
- Temperatureweight 50 %65 %
- Sunshineweight 20 %7 %
- Few rainy daysweight 30 %44 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Grantham
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 Grantham: score 76 against 47. In July, days are 7 °C warmer than in October. July has one rainy day fewer. The sun shines 3 hours longer a day in July.
| Month | October | July |
|---|---|---|
| Holiday weather score | 47 | 76better |
| Daytime high | 15° | 22° |
| Night-time low | 7° | 12° |
| Sunshine | 3.4 h | 6.5 hbetter |
| Rainy days | 12 | 11better |
| Rainfall | 66 mm | 66 mm |
Based on the climate averages 1996–2025.
Grantham month by month
The typical weather for every month at a glance.
15January7° · 2.0 h
In January, Grantham is cold: daytime highs average 7 °C, and nights cool down to about 2 °C. The sun is scarce, with only about 2.0 hours a day. Rain is frequent, with about 11 rainy days and 49 mm in total. All in all, January is not an ideal month for a holiday in Grantham.
Grantham in January17February8° · 3.0 h
In February, Grantham is cold: daytime highs average 8 °C, and nights cool down to about 2 °C. The sun is scarce, with only about 3.0 hours a day. Rain is frequent, with about 10 rainy days and 43 mm in total. All in all, February is not an ideal month for a holiday in Grantham.
Grantham in February33March11° · 3.9 h
In March, Grantham is cool: daytime highs average 11 °C, and nights cool down to about 3 °C. The sun is scarce, with only about 3.9 hours a day. Rain is frequent, with about 10 rainy days and 45 mm in total. All in all, March is not an ideal month for a holiday in Grantham.
Grantham in March52April14° · 5.5 h
In April, Grantham is cool: daytime highs average 14 °C, and nights cool down to about 5 °C. Expect around 5.5 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 50 mm in total. All in all, April is a so-so month for a holiday in Grantham.
Grantham in April70May17° · 6.5 h
In May, Grantham is mild: daytime highs average 17 °C, and nights cool down to about 7 °C. The sun shines for around 6.5 hours a day. Rain is frequent, with about 11 rainy days and 56 mm in total. All in all, May is a good month for a holiday in Grantham.
Grantham in May75June20° · 6.2 h
In June, Grantham is mild: daytime highs average 20 °C, and nights cool down to about 10 °C. Expect around 6.2 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 66 mm in total. All in all, June is a good month for a holiday in Grantham.
Grantham in June76July22° · 6.5 h
In July, Grantham is warm: daytime highs average 22 °C, and nights cool down to about 12 °C. The sun shines for around 6.5 hours a day. Rain is frequent, with about 11 rainy days and 66 mm in total. All in all, July is a good month for a holiday in Grantham.
Grantham in July74August22° · 6.0 h
In August, Grantham is warm: daytime highs average 22 °C, and nights cool down to about 12 °C. Expect around 6.0 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 66 mm in total. All in all, August is a good month for a holiday in Grantham.
Grantham in August75September19° · 4.9 h
In September, Grantham is mild: daytime highs average 19 °C, and nights cool down to about 10 °C. Expect around 4.9 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 51 mm in total. All in all, September is a good month for a holiday in Grantham.
Grantham in September47October15° · 3.4 h
In October, Grantham is cool: daytime highs average 15 °C, and nights cool down to about 7 °C. The sun is scarce, with only about 3.4 hours a day. Rain is frequent, with about 12 rainy days and 66 mm in total. All in all, October is a so-so month for a holiday in Grantham.
Grantham in October25November10° · 2.3 h
In November, Grantham is cool: daytime highs average 10 °C, and nights cool down to about 4 °C. The sun is scarce, with only about 2.3 hours a day. Rain is frequent, with about 11 rainy days and 58 mm in total. All in all, November is not an ideal month for a holiday in Grantham.
Grantham in November14December7° · 1.9 h
In December, Grantham is cold: daytime highs average 7 °C, and nights cool down to about 2 °C. The sun is scarce, with only about 1.9 hours a day. Rain is frequent, with about 11 rainy days and 56 mm in total. All in all, December is not an ideal month for a holiday in Grantham.
Grantham in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Grantham
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cold 0–8°
- Cool 8–15°
ColdOctober: nights around 7°. The room should be heated.
The coolest nights are in January (2°), the warmest in July (12°). Nights fall below 8 °C on average from October 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 | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 15 | 7° | 2° | 2.0 h | 11 | 49 |
| FebruaryFeb | 17 | 8° | 2° | 3.0 h | 10 | 43 |
| MarchMar | 33 | 11° | 3° | 3.9 h | 10 | 45 |
| AprilApr | 52 | 14° | 5° | 5.5 h | 11 | 50 |
| MayMay | 70 | 17° | 7° | 6.5 h | 11 | 56 |
| JuneJun | 75 | 20° | 10° | 6.2 h | 11 | 66 |
| JulyJul | 76 | 22° | 12° | 6.5 h | 11 | 66 |
| AugustAug | 74 | 22° | 12° | 6.0 h | 11 | 66 |
| SeptemberSep | 75 | 19° | 10° | 4.9 h | 9 | 51 |
| OctoberOct | 47 | 15° | 7° | 3.4 h | 12 | 66 |
| NovemberNov | 25 | 10° | 4° | 2.3 h | 11 | 58 |
| DecemberDec | 14 | 7° | 2° | 1.9 h | 11 | 56 |
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
52.91° N, 0.64° W · 64 m · Europe/London
Sunshine hours in Grantham
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 3.4 of 10.7 hours of daylight in Grantham, 32 % 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.
Rain in Grantham: 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, Grantham has about 12 rainy days with 66 mm of rain in total.
UV index in Grantham
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 2 · lowLittle protection needed; sunglasses on bright days.
The sun is strongest in June (UV 7).
Minutes until sunburn in October
- Very fair skin
- about 75 min
- Fair skin
- about 95 min
- 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 and clouds in Grantham
How breezy and how cloudy Grantham 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 Grantham typically peaks at 24 km/h during the day: Beaufort 4, moderate breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 72 % of the sky over Grantham: mostly cloudy, with about 3.4 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.
Planning a trip to Grantham
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Grantham 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.
Grantham has its best school-holiday weather during the summer holidays (score 75) and its weakest during the Christmas holidays (score 15).
- 46
Easter holidays
Mar – Apr
Fair
- 13 °C by day
- 5.0 h of sun a day
- 11 rainy days a month
- 71
May half-term
May – Jun
Good
- 17 °C by day
- 6.4 h of sun a day
- 11 rainy days a month
Good for: Sightseeing & walks
- 75
Summer holidays
Jul – Aug
GoodBest holidays
- 22 °C by day
- 6.2 h of sun a day
- 11 rainy days a month
Good for: Sightseeing & walks
- 47
October half-term
Oct
Fair
- 15 °C by day
- 3.4 h of sun a day
- 12 rainy days a month
- 15
Christmas holidays
Dec – Jan
Poor
- 7 °C by day
- 2.0 h of sun a day
- 11 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- Short trip – train or car is often quicker
- Distance
- 160 km
- Time zone
- UTC+1
- 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.
Compare & alternatives
Grantham compared
Put Grantham side by side with another destination.
Grantham vs Stamford
In October the holiday weather in Grantham and Stamford is about equally good (score 47 vs 50). During the day it is about as warm in Stamford as in Grantham. Stamford gets one more hour of sunshine a day.
| in October | Grantham | Stamford |
|---|---|---|
| Holiday weather score | 47 | 50 |
| Daytime high | 15° | 15° |
| Sunshine | 3 h | 4 h |
| Rainy days | 12 | 12 |
| Best time | May – Sep | May – Sep |
Through the year
United Kingdom in October: the best places
In October, Grantham ranks 15 among the 31 nearest destinations in this country.
- Bedford15°53
- 2Cambridge15°53
- 3Ely15°52
- 4Peterborough15°51
- 5Stamford15°50
- 6Grimsby15°13°50
- 7Stratford-upon-Avon15°50
- 8Northampton15°49
- 15GranthamThis page15°47
Near Grantham
Other destinations close by.
Places with a climate like Grantham
Destinations whose weather through the year is closest to Grantham's – good alternatives.
Frequently asked questions about Grantham
When is the best time to visit Grantham?
The best time to visit Grantham is from May to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Grantham?
July is the warmest month, with average highs of 22 °C and nights around 12 °C. January is the coolest month at 7 °C.
When does it rain most in Grantham?
The wettest month is July with 66 mm of precipitation. The driest month is February with 43 mm.
How many hours of sunshine does Grantham get?
Grantham gets around 1,590 hours of sunshine a year. The sunniest month is May with 6.5 hours a day; in December there are 1.9 hours a day.
What time zone is Grantham in?
Grantham is on UTC+0 in January and UTC+1 in July.
Which school holidays are best for Grantham?
Grantham has its best school-holiday weather during the summer holidays (score 75) and its weakest during the Christmas holidays (score 15). Holiday ratings (0–100): Easter holidays 46, May half-term 71, summer holidays 75, October half-term 47, Christmas holidays 15.