Climate averages 1991–2020
Shahrīār weather
in January.
A cold, fairly dry month: the coolest and the joint 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Shahrīār: daytime highs average 6.2°C and nights cool to about -5.0°C. By daytime temperature it is the coolest month of the year.
Expect about 37 mm of rain on roughly 7 days, which makes January a fairly dry month (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 02 min on an average January day.
The nearest other city in this atlas is Shahre Jadide Andisheh (4 km away). In January its highs average 6.1°C, about as warm as Shahrīār, with 37 mm of rain.
Among the 128 cities listed in Iran, Shahrīār ranks joint 76th of 128 for the warmest January highs and joint 53rd of 128 for the driest January (rainfall, lowest first). The mean January high of those 128 cities is 8.6°C; Shahrīār is 2.4°C cooler than that mean.
From January to February, average highs rise by 2.2°C to 8.5°C, and monthly rainfall rises from 37 mm to 40 mm.
The annual picture
January 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
Shahrīār climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 6.2°C-5.0°C | -5.0°C | 37 | 7.0 | 10.010 h |
| February | 8.5°C-3.3°C | -3.3°C | 40 | 7.8 | 10.911 h |
| March | 14.0°C1.2°C | 1.2°C | 48 | 9.0 | 11.912 h |
| April | 20.4°C6.8°C | 6.8°C | 42 | 7.7 | 13.113 h |
| May | 26.8°C12.5°C | 12.5°C | 15 | 3.5 | 14.014 h |
| June | 33.0°C18.3°C | 18.3°C | 2.7 | 0.7 | 14.515 h |
| July | 35.9°C21.9°C | 21.9°C | 1.4 | 0.4 | 14.314 h |
| August | 35.0°C21.0°C | 21.0°C | 1.7 | 0.2 | 13.514 h |
| September | 30.3°C16.3°C | 16.3°C | 1.6 | 0.4 | 12.412 h |
| October | 23.0°C10.2°C | 10.2°C | 14 | 2.8 | 11.311 h |
| November | 13.9°C2.9°C | 2.9°C | 35 | 6.0 | 10.310 h |
| December | 8.5°C-2.1°C | -2.1°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
January in nearby cities
- Shahre Jadide Andisheh in JanuaryIran · 4 kmHigh 6.1°C · Low -5.2°C · 37 mm rain
- Bāghestān in JanuaryIran · 7 kmHigh 7.2°C · Low -4.1°C · 42 mm rain
- Moḩammad Shahr in JanuaryIran · 17 kmHigh 5.8°C · Low -5.7°C · 37 mm rain
- Golestān in JanuaryIran · 19 kmHigh 8.1°C · Low -3.0°C · 42 mm rain
- Robāţ Karīm in JanuaryIran · 20 kmHigh 8.1°C · Low -2.8°C · 36 mm rain
- Eslamshahr in JanuaryIran · 20 kmHigh 7.4°C · Low -3.6°C · 42 mm rain
- Karaj in JanuaryIran · 20 kmHigh 5.2°C · Low -6.2°C · 37 mm rain
- Parand in JanuaryIran · 22 kmHigh 7.6°C · Low -3.1°C · 36 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 Shahrīār) is explained once on the Shahrīār year overview and on the Sources, method and limits page.
Karaj, 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.