AI-generatedKaraj at a glance
- Best time
- Apr – May, Oct
- Warmest month
- Jul · 37°
- Sunshine a year
- 2,950 h
- Rain a year
- 270 mm
- Climate
- Temperate
- Time zone
- UTC+3:30
- Elevation
- 1,341 m
Climate in Karaj
Karaj has a temperate climate with warm summers and cool winters. July is the warmest month with average highs of 37 °C, while January is the coolest at 8 °C. With around 2,950 hours of sunshine a year, Karaj is sunny; June is the sunniest month with 11.2 hours a day.
Holiday weather through the year
Best time to visit Karaj
The best time to visit Karaj is from April to May and in October. For sightseeing, day trips and hiking, conditions are most comfortable from March to May and from October to November. From June to August it can get very hot, with highs of up to 37 °C. The wettest month is March with 47 mm of precipitation.
Karaj through the seasons
How the weather changes over the seasons, with averages for each.
Karaj in spring
Mar – May
Excellent
- 16–28 °C by day
- 7.6 h of sun a day
- 20 rainy days in all
Karaj in summer
Jun – Aug
Fair
- 34–37 °C by day
- 11.1 h of sun a day
- 2 rainy days in all
Karaj in autumn
Sep – Nov
Excellent
- 15–31 °C by day
- 7.9 h of sun a day
- 10 rainy days in all
Karaj in winter
Dec – Feb
Poor
- 8–10 °C by day
- 5.7 h of sun a day
- 22 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Mar – May, Oct – Nov
15–28 °C and not too much rain
Peak heat
Jun – Aug
Highs of 33 °C or more
Snow
Jan – Feb
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Karaj for you.
Your best months: April, October
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Excellent
Best time to visit: April – May, October
Good forSightseeing & walks
A typical day in October
- Morning, 08:00: about 16°
- Midday, 13:00: about 24°
- Afternoon, 16:00: about 22°
- Evening, 20:00: about 17°
- Night, 23:00: about 14°
06:1117:32
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:56–06:46 · evening 16:57–17:48
- Blue hour
- Morning 05:46–05:56 · evening 17:48–17:58
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 Karaj compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 27° at the start of the month to 19° at the end. The days get 1.1 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 27° | 19° |
| Night-time low | 14° | 7° |
| Daylight | 11.9 h | 10.8 h |
What is the weather like in Karaj in October?
In October, Karaj is warm: daytime highs average 24 °C, and nights cool down to about 11 °C. The sun shines for around 7.9 hours a day. Rain is rare: about 3 days bring 16 mm in total. All in all, October is an excellent month for a holiday in Karaj.
More details for October
- Daylight
- 11 h 20 min06:11 – 17:32
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 12 km/haverage daily peakAll months
- Cloud cover
- 23 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+3:30offset from UTC
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %82 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- A jumper for the evenings
Compare two months in Karaj
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
October and May bring similar holiday weather to Karaj (score 96 and 95). In May, days are 4 °C warmer than in October. May has one more rainy day. The sun shines an hour longer a day in May.
| Month | October | May |
|---|---|---|
| Holiday weather score | 96 | 95 |
| Daytime high | 24° | 28° |
| Night-time low | 11° | 14° |
| Sunshine | 7.9 h | 8.9 hbetter |
| Rainy days | 3better | 4 |
| Rainfall | 16 mm | 14 mm |
Based on the climate averages 1996–2025.
Karaj month by month
The typical weather for every month at a glance.
33January8° · 5.6 h
In January, Karaj is cold: daytime highs average 8 °C, and nights often drop below freezing (−3 °C). Expect around 5.6 hours of sunshine a day. Rain falls on about 7 days, adding up to 36 mm. Snow falls on about 3 days. All in all, January is not an ideal month for a holiday in Karaj.
Karaj in January44February10° · 6.2 h
In February, Karaj is cool: daytime highs average 10 °C, and nights often drop below freezing (−2 °C). Expect around 6.2 hours of sunshine a day. Rain falls on about 8 days, adding up to 40 mm. Snow falls on about 2 days. All in all, February is a so-so month for a holiday in Karaj.
Karaj in February68March16° · 6.5 h
In March, Karaj is cool: daytime highs average 16 °C, and nights cool down to about 3 °C. The sun shines for around 6.5 hours a day. Rain is frequent, with about 9 rainy days and 47 mm in total. All in all, March is a good month for a holiday in Karaj.
Karaj in March87April22° · 7.5 h
In April, Karaj is warm: daytime highs average 22 °C, and nights cool down to about 9 °C. The sun shines for around 7.5 hours a day. Rain falls on about 8 days, adding up to 40 mm. All in all, April is an excellent month for a holiday in Karaj.
Karaj in April95May28° · 8.9 h
In May, Karaj is hot: daytime highs average 28 °C, and nights cool down to about 14 °C. The sun shines for around 8.9 hours a day. Rain is rare: about 4 days bring 14 mm in total. On about 9 days the thermometer climbs to 30 °C or more. All in all, May is an excellent month for a holiday in Karaj.
Karaj in May57June34° · 11.2 h
In June, Karaj is very hot: daytime highs average 34 °C, and nights cool down to about 19 °C. With around 11.2 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 27 days the thermometer climbs to 30 °C or more. All in all, June is a so-so month for a holiday in Karaj.
Karaj in June50July37° · 11.1 h
In July, Karaj is very hot: daytime highs average 37 °C, and even at night it stays warm at around 21 °C. With around 11.1 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The thermometer climbs to 30 °C or more every day. All in all, July is a so-so month for a holiday in Karaj.
Karaj in July50August36° · 10.9 h
In August, Karaj is very hot: daytime highs average 36 °C, and even at night it stays warm at around 21 °C. With around 10.9 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The thermometer climbs to 30 °C or more every day. All in all, August is a so-so month for a holiday in Karaj.
Karaj in August74September31° · 10.0 h
In September, Karaj is hot: daytime highs average 31 °C, and nights cool down to about 17 °C. With around 10.0 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 20 days the thermometer climbs to 30 °C or more. All in all, September is a good month for a holiday in Karaj.
Karaj in September96October24° · 7.9 h
In October, Karaj is warm: daytime highs average 24 °C, and nights cool down to about 11 °C. The sun shines for around 7.9 hours a day. Rain is rare: about 3 days bring 16 mm in total. All in all, October is an excellent month for a holiday in Karaj.
Karaj in October69November15° · 5.9 h
In November, Karaj is cool: daytime highs average 15 °C, and nights cool down to about 4 °C. Expect around 5.9 hours of sunshine a day. Rain falls on about 7 days, adding up to 32 mm. All in all, November is a good month for a holiday in Karaj.
Karaj in November40December10° · 5.2 h
In December, Karaj is cold: daytime highs average 10 °C, and nights often drop below freezing (−1 °C). Expect around 5.2 hours of sunshine a day. Rain falls on about 7 days, adding up to 36 mm. All in all, December is a so-so month for a holiday in Karaj.
Karaj in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Karaj
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°
- Pleasant 15–20°
- Warm 20–24°
CoolOctober: nights around 11°. A duvet at night and a jumper for the evening.
The coolest nights are in January (−3°), the warmest in July (21°). Tropical nights of 20 °C and more are the rule from July to August; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in June and in September. Nights fall below 8 °C on average from November to March, 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 | 33 | 8° | −3° | 5.6 h | 7 | 36 |
| FebruaryFeb | 44 | 10° | −2° | 6.2 h | 8 | 40 |
| MarchMar | 68 | 16° | 3° | 6.5 h | 9 | 47 |
| AprilApr | 87 | 22° | 9° | 7.5 h | 8 | 40 |
| MayMay | 95 | 28° | 14° | 8.9 h | 4 | 14 |
| JuneJun | 57 | 34° | 19° | 11.2 h | 1 | 3 |
| JulyJul | 50 | 37° | 21° | 11.1 h | 0 | 2 |
| AugustAug | 50 | 36° | 21° | 10.9 h | 0 | 2 |
| SeptemberSep | 74 | 31° | 17° | 10.0 h | 0 | 2 |
| OctoberOct | 96 | 24° | 11° | 7.9 h | 3 | 16 |
| NovemberNov | 69 | 15° | 4° | 5.9 h | 7 | 32 |
| DecemberDec | 40 | 10° | −1° | 5.2 h | 7 | 36 |
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
35.83° N, 50.99° E · 1,341 m · Asia/Tehran
Sunshine hours in Karaj
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 7.9 of 11.3 hours of daylight in Karaj, 70 % 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 Karaj: 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, Karaj has about 3 rainy days with 16 mm of rain in total.
UV index in Karaj
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 5 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 11).
Minutes until sunburn in October
- Very fair skin
- about 25 min
- Fair skin
- about 30 min
- Light brown skin
- about 45 min
- Olive skin
- about 55 min
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 Karaj
How breezy and how cloudy Karaj 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 Karaj typically peaks at 12 km/h during the day: Beaufort 3, gentle breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 23 % of the sky over Karaj: mostly sunny, with about 7.9 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.
Heat and humidity in Karaj
How often the day gets hot in Karaj (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Karaj has about 1 hot day, with an average daytime high of 24 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Snow in Karaj
Snow is possible in Karaj, but no month makes it likely: 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 Karaj.
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 Karaj
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Karaj 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.
Karaj has its best school-holiday weather during October half-term (score 96) and its weakest during the Christmas holidays (score 37).
- 81
Easter holidays
Mar – Apr
Excellent
- 20 °C by day
- 7.2 h of sun a day
- 8 rainy days a month
Good for: Sightseeing & walks
- 87
May half-term
May – Jun
Excellent
- 29 °C by day
- 9.4 h of sun a day
- 3 rainy days a month
Good for: Sightseeing & walks
- 50
Summer holidays
Jul – Aug
Fair
- 36 °C by day
- 11.0 h of sun a day
- 0 rainy days a month
Keep in mind: Peak heat
- 96
October half-term
Oct
ExcellentBest holidays
- 24 °C by day
- 7.9 h of sun a day
- 3 rainy days a month
Good for: Sightseeing & walks
- 37
Christmas holidays
Dec – Jan
Poor
- 9 °C by day
- 5.4 h of sun a day
- 7 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 5 h 45 min
- Distance
- 4,380 km
- Time zone
- UTC+3:30
- 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
Karaj compared
Put Karaj side by side with another destination.
Karaj vs Tehran
In October the holiday weather in Karaj and Tehran is about equally good (score 96 vs 97). During the day Tehran is 1 °C warmer than Karaj.
| in October | Karaj | Tehran |
|---|---|---|
| Holiday weather score | 96 | 97 |
| Daytime high | 24° | 25° |
| Sunshine | 8 h | 8 h |
| Rainy days | 3 | 3 |
| Best time | Apr – May, Oct | Apr – May, Oct |
Through the year
Iran in October: the best places
In October, Karaj ranks 6 of 18 destinations in this country.
- Kerman26°100
- 2Nishapur25°98
- 3Mashhad24°98
- 4Tehran25°97
- 5Sanandaj24°97
- 6KarajThis page24°96
- 7Tabriz22°96
- 8Urmia21°95
Near Karaj
Other destinations close by.
Places with a climate like Karaj
Destinations whose weather through the year is closest to Karaj's – good alternatives.
Frequently asked questions about Karaj
When is the best time to visit Karaj?
The best time to visit Karaj is from April to May and in October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Karaj?
July is the warmest month, with average highs of 37 °C and nights around 21 °C. January is the coolest month at 8 °C.
When does it rain most in Karaj?
The wettest month is March with 47 mm of precipitation. The driest month is July with 2 mm.
How many hours of sunshine does Karaj get?
Karaj gets around 2,950 hours of sunshine a year. The sunniest month is June with 11.2 hours a day; in December there are 5.2 hours a day.
What time zone is Karaj in?
Karaj is on UTC+3:30 all year.
How long is the flight from London to Karaj?
A nonstop flight from London to Karaj takes about 5 h 45 min, for a straight-line distance of about 4,380 km.
Which school holidays are best for Karaj?
Karaj has its best school-holiday weather during October half-term (score 96) and its weakest during the Christmas holidays (score 37). Holiday ratings (0–100): Easter holidays 81, May half-term 87, summer holidays 50, October half-term 96, Christmas holidays 37.