Weatheo
  • Karaj ›
  • Weather by month

Karaj Weather by Month

Average temperatures, rainfall and humidity for Karaj, Iran, month by month, built from OpenWeather’s historical records. Use it to see what a typical Karaj month looks like before you travel — then check the live Karaj forecast for the days ahead.

Warmest month

July

36°C average high

Coolest month

January

-1°C average low

Wettest month

March

52 mm of rain

Driest month

August

1 mm of rain

Average temperature and rainfall in Karaj by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January9°C-1°C-19°C / 17°C
18 mm
55%11 km/h
February11°C1°C-19°C / 24°C
20 mm
53%12 km/h
March16°C5°C-17°C / 30°C
52 mm
45%13 km/h
April21°C10°C-2°C / 32°C
38 mm
40%13 km/h
May28°C16°C1°C / 36°C
18 mm
33%14 km/h
June34°C21°C6°C / 42°C
6 mm
25%14 km/h
July36°C24°C11°C / 42°C
2 mm
24%13 km/h
August35°C22°C10°C / 41°C
1 mm
24%12 km/h
September31°C18°C1°C / 38°C
3 mm
27%12 km/h
October23°C12°C-5°C / 32°C
15 mm
39%10 km/h
November15°C5°C-12°C / 25°C
27 mm
51%9 km/h
December10°C1°C-12°C / 19°C
18 mm
56%10 km/h

Best time to visit Karaj

The most comfortable time to visit Karaj is generally April to May and October, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around March, totalling about 217 mm a year.

Travellers who prefer heat should aim for July, when highs average 36°C. March is the month to avoid if rain would spoil your plans — it averages 52 mm, roughly 52× the rainfall of the driest month (August).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Karaj forecast for what is happening now.

Weather across Iran right now