Climate averages 1991–2020
Arāk weather
in December.
A cool, fairly dry month: the 10th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Arāk: daytime highs average 8.3°C and nights cool to about -3.1°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 31 mm of rain on roughly 6 days, which makes December a fairly dry month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 56 min on an average December day.
The nearest other city in this atlas is Khomeyn (62 km away). In December its highs average 8.7°C, about as warm as Arāk, with 28 mm of rain.
Among the 128 cities listed in Iran, Arāk ranks joint 82nd of 128 for the warmest December highs and 41st of 128 for the driest December (rainfall, lowest first). The mean December high of those 128 cities is 10.9°C; Arāk is 2.7°C cooler than that mean.
From December to January, average highs fall by 3.2°C to 5.1°C, and monthly rainfall rises from 31 mm to 32 mm.
The annual picture
December 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
Arāk climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.1°C-6.3°C | -6.3°C | 32 | 6.6 | 10.210 h |
| February | 7.6°C-4.7°C | -4.7°C | 33 | 6.5 | 10.911 h |
| March | 12.7°C-0.6°C | -0.6°C | 49 | 8.1 | 12.012 h |
| April | 18.4°C4.8°C | 4.8°C | 43 | 8.9 | 13.013 h |
| May | 24.3°C10.1°C | 10.1°C | 24 | 6.3 | 13.914 h |
| June | 30.8°C16.0°C | 16.0°C | 4.1 | 1.0 | 14.414 h |
| July | 34.0°C19.9°C | 19.9°C | 1.3 | 0.4 | 14.214 h |
| August | 33.2°C19.0°C | 19.0°C | 0.8 | 0.2 | 13.413 h |
| September | 28.8°C14.1°C | 14.1°C | 1.3 | 0.4 | 12.412 h |
| October | 21.7°C8.1°C | 8.1°C | 14 | 3.7 | 11.411 h |
| November | 13.2°C1.6°C | 1.6°C | 30 | 6.2 | 10.410 h |
| December, selected | 8.3°C-3.1°C | -3.1°C | 31 | 6.2 | 9.910 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
December in nearby cities
- Khomeyn in DecemberIran · 62 kmHigh 8.7°C · Low -2.7°C · 28 mm rain
- Alīgūdarz in DecemberIran · 77 kmHigh 5.1°C · Low -5.7°C · 41 mm rain
- Malāyer in DecemberIran · 84 kmHigh 6.7°C · Low -3.0°C · 47 mm rain
- Dorūd in DecemberIran · 89 kmHigh 8.7°C · Low -0.4°C · 87 mm rain
- Borūjerd in DecemberIran · 90 kmHigh 7.3°C · Low -1.2°C · 67 mm rain
- Shahrak-e Pardīsān in DecemberIran · 114 kmHigh 10.6°C · Low 1.4°C · 21 mm rain
- Sāveh in DecemberIran · 119 kmHigh 10.1°C · Low 0.2°C · 32 mm rain
- Nahāvand in DecemberIran · 122 kmHigh 7.1°C · Low -2.4°C · 62 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 Arāk) is explained once on the Arāk year overview and on the Sources, method and limits page.