Climate averages 1991–2020
Būmahen weather
in January.
A cold month with light precipitation: the coolest and the joint 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Būmahen: daytime highs average 1.8°C and nights cool to about -6.0°C. By daytime temperature it is the coolest month of the year.
Expect about 36 mm of precipitation on roughly 7 days, which makes January a month with light precipitation (the joint 7th 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 Pardīs (5 km away). In January its highs average 0.8°C, 1.0°C cooler than Būmahen, with 36 mm of precipitation.
Among the 128 cities listed in Iran, Būmahen ranks 126th of 128 for the warmest January highs and joint 46th of 128 for the driest January (precipitation, lowest first). The mean January high of those 128 cities is 8.6°C; Būmahen is 6.8°C cooler than that mean.
From January to February, average highs rise by 1.7°C to 3.5°C, and monthly precipitation rises from 36 mm to 44 mm.
The annual picture
January in context
Monthly precipitation
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
Būmahen climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 1.8°C-6.0°C | -6.0°C | 36 | 6.7 | 10.010 h |
| February | 3.5°C-4.5°C | -4.5°C | 44 | 8.1 | 10.911 h |
| March | 8.8°C0.3°C | 0.3°C | 59 | 9.6 | 11.912 h |
| April | 15.7°C6.6°C | 6.6°C | 50 | 9.7 | 13.113 h |
| May | 22.2°C12.6°C | 12.6°C | 24 | 5.1 | 14.014 h |
| June | 28.5°C18.0°C | 18.0°C | 6.7 | 1.8 | 14.515 h |
| July | 31.4°C21.5°C | 21.5°C | 5.2 | 1.3 | 14.314 h |
| August | 30.3°C20.8°C | 20.8°C | 5.0 | 1.1 | 13.514 h |
| September | 25.7°C17.1°C | 17.1°C | 5.7 | 1.3 | 12.412 h |
| October | 18.6°C11.0°C | 11.0°C | 20 | 3.9 | 11.311 h |
| November | 9.8°C2.7°C | 2.7°C | 40 | 6.8 | 10.310 h |
| December | 4.3°C-3.1°C | -3.1°C | 36 | 7.0 | 9.810 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
- Pardīs in JanuaryIran · 5 kmHigh 0.8°C · Low -7.6°C · 36 mm precipitation
- Pākdasht in JanuaryIran · 33 kmHigh 8.2°C · Low -1.9°C · 30 mm rain
- Tehran in JanuaryIran · 41 kmHigh 5.3°C · Low -5.3°C · 42 mm rain
- Tajrīsh in JanuaryIran · 41 kmHigh 2.2°C · Low -7.9°C · 42 mm rain
- Qarchak in JanuaryIran · 43 kmHigh 8.6°C · Low -2.3°C · 38 mm rain
- Varāmīn in JanuaryIran · 49 kmHigh 9.4°C · Low -1.9°C · 23 mm rain
- Eslamshahr in JanuaryIran · 61 kmHigh 7.4°C · Low -3.6°C · 42 mm rain
- Golestān in JanuaryIran · 66 kmHigh 8.1°C · Low -3.0°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 Būmahen) is explained once on the Būmahen year overview and on the Sources, method and limits page.
Pardīs lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.