Climate averages 1991–2020
Chālūs weather
in January.
A cool, wet month: the 11th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cool month in Chālūs: daytime highs average 10.6°C and nights cool to about 7.1°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 142 mm of rain on roughly 15 days, which makes January a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 58 min on an average January day.
The nearest other city in this atlas is Āmol (86 km away). In January its highs average 10.5°C, about as warm as Chālūs, with 128 mm of rain.
Among the 128 cities listed in Iran, Chālūs ranks joint 39th of 128 for the warmest January highs and 126th of 128 for the driest January (rainfall, lowest first). The mean January high of those 128 cities is 8.6°C; Chālūs is 2.0°C warmer than that mean.
From January to February, average highs fall by 0.3°C to 10.4°C, and monthly rainfall falls from 142 mm to 125 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
Chālūs climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 10.6°C7.1°C | 7.1°C | 142 | 15.3 | 10.010 h |
| February | 10.4°C6.5°C | 6.5°C | 125 | 14.4 | 10.811 h |
| March | 12.8°C8.3°C | 8.3°C | 100 | 14.1 | 11.912 h |
| April | 16.6°C11.8°C | 11.8°C | 68 | 11.4 | 13.113 h |
| May | 20.9°C16.7°C | 16.7°C | 48 | 10.0 | 14.114 h |
| June | 24.3°C20.8°C | 20.8°C | 49 | 8.9 | 14.615 h |
| July | 26.2°C23.0°C | 23.0°C | 59 | 10.8 | 14.414 h |
| August | 26.9°C23.7°C | 23.7°C | 60 | 11.3 | 13.614 h |
| September | 24.2°C21.1°C | 21.1°C | 148 | 14.6 | 12.412 h |
| October | 21.0°C17.6°C | 17.6°C | 205 | 15.4 | 11.311 h |
| November | 16.0°C12.7°C | 12.7°C | 218 | 15.8 | 10.310 h |
| December | 12.6°C9.2°C | 9.2°C | 156 | 14.6 | 9.710 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
- Āmol in JanuaryIran · 86 kmHigh 10.5°C · Low 1.7°C · 128 mm rain
- Tajrīsh in JanuaryIran · 95 kmHigh 2.2°C · Low -7.9°C · 42 mm rain
- Mehestan in JanuaryIran · 96 kmHigh 3.3°C · Low -6.1°C · 35 mm rain
- Karaj in JanuaryIran · 99 kmHigh 5.2°C · Low -6.2°C · 37 mm rain
- Kamālshahr in JanuaryIran · 101 kmHigh 5.1°C · Low -5.9°C · 36 mm rain
- Naz̧arābād in JanuaryIran · 107 kmHigh 5.3°C · Low -4.0°C · 41 mm rain
- Tehran in JanuaryIran · 107 kmHigh 5.3°C · Low -5.3°C · 42 mm rain
- Pardīs in JanuaryIran · 107 kmHigh 0.8°C · Low -7.6°C · 36 mm precipitation
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 Chālūs) is explained once on the Chālūs year overview and on the Sources, method and limits page.