Climate averages 1991–2020
Karaj weather
in April.
A mild, moderately wet month: the 7th warmest and the 11th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Karaj: daytime highs average 19.2°C and nights cool to about 5.9°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 42 mm of rain on roughly 8 days, which makes April a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 05 min on an average April day.
The nearest other city in this atlas is Moḩammad Shahr (10 km away). In April its highs average 19.6°C, about as warm as Karaj, with 42 mm of rain.
Among the 128 cities listed in Iran, Karaj ranks 76th of 128 for the warmest April highs and joint 55th of 128 for the driest April (rainfall, lowest first). The mean April high of those 128 cities is 21.8°C; Karaj is 2.6°C cooler than that mean.
From April to May, average highs rise by 6.4°C to 25.6°C, and monthly rainfall falls from 42 mm to 15 mm.
The annual picture
April in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Karaj climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.2°C-6.2°C | -6.2°C | 37 | 7.0 | 10.010 h |
| February | 7.3°C-4.4°C | -4.4°C | 40 | 7.8 | 10.911 h |
| March | 12.9°C0.2°C | 0.2°C | 48 | 9.0 | 11.912 h |
| April, selected | 19.2°C5.9°C | 5.9°C | 42 | 7.7 | 13.113 h |
| May | 25.6°C11.4°C | 11.4°C | 15 | 3.5 | 14.014 h |
| June | 31.9°C17.2°C | 17.2°C | 2.7 | 0.7 | 14.515 h |
| July | 34.9°C20.8°C | 20.8°C | 1.4 | 0.4 | 14.314 h |
| August | 34.0°C20.2°C | 20.2°C | 1.7 | 0.2 | 13.514 h |
| September | 29.1°C15.4°C | 15.4°C | 1.6 | 0.4 | 12.412 h |
| October | 21.8°C9.3°C | 9.3°C | 14 | 2.8 | 11.311 h |
| November | 12.9°C1.8°C | 1.8°C | 35 | 6.0 | 10.310 h |
| December | 7.5°C-3.3°C | -3.3°C | 37 | 6.9 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Moḩammad Shahr in AprilIran · 10 kmHigh 19.6°C · Low 6.1°C · 42 mm rain
- Kamālshahr in AprilIran · 11 kmHigh 18.9°C · Low 6.5°C · 44 mm rain
- Shahre Jadide Andisheh in AprilIran · 17 kmHigh 20.2°C · Low 6.5°C · 42 mm rain
- Shahrīār in AprilIran · 20 kmHigh 20.4°C · Low 6.8°C · 42 mm rain
- Bāghestān in AprilIran · 24 kmHigh 21.3°C · Low 7.5°C · 46 mm rain
- Mehestan in AprilIran · 28 kmHigh 16.9°C · Low 5.7°C · 47 mm rain
- Naz̧arābād in AprilIran · 37 kmHigh 18.9°C · Low 7.2°C · 58 mm rain
- Eslamshahr in AprilIran · 38 kmHigh 21.8°C · Low 8.2°C · 42 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Karaj) is explained once on the Karaj year overview and on the Sources, method and limits page.
Shahrīār, Moḩammad Shahr and Shahre Jadide Andisheh lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.