Climate averages 1991–2020
Karaj weather
in October.
A mild, very dry month: the 6th warmest and the 5th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Karaj: daytime highs average 21.8°C and nights cool to about 9.3°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 14 mm of rain on roughly 3 days, which makes October a very dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 19 min on an average October day.
The nearest other city in this atlas is Moḩammad Shahr (10 km away). In October its highs average 22.3°C, about as warm as Karaj, with 14 mm of rain.
Among the 128 cities listed in Iran, Karaj ranks joint 90th of 128 for the warmest October highs and joint 59th of 128 for the driest October (rainfall, lowest first). The mean October high of those 128 cities is 24.7°C; Karaj is 2.8°C cooler than that mean.
From October to November, average highs fall by 8.9°C to 12.9°C, and monthly rainfall rises from 14 mm to 35 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Moḩammad Shahr in OctoberIran · 10 kmHigh 22.3°C · Low 9.2°C · 14 mm rain
- Kamālshahr in OctoberIran · 11 kmHigh 21.9°C · Low 10.7°C · 16 mm rain
- Shahre Jadide Andisheh in OctoberIran · 17 kmHigh 22.7°C · Low 9.9°C · 14 mm rain
- Shahrīār in OctoberIran · 20 kmHigh 23.0°C · Low 10.2°C · 14 mm rain
- Bāghestān in OctoberIran · 24 kmHigh 23.9°C · Low 10.4°C · 18 mm rain
- Mehestan in OctoberIran · 28 kmHigh 19.9°C · Low 9.7°C · 14 mm rain
- Naz̧arābād in OctoberIran · 37 kmHigh 21.8°C · Low 10.9°C · 20 mm rain
- Eslamshahr in OctoberIran · 38 kmHigh 24.2°C · Low 11.0°C · 16 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.