Climate averages 1991–2020
Khomeyn 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 Khomeyn: daytime highs average 8.7°C and nights cool to about -2.7°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 28 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 58 min on an average December day.
The nearest other city in this atlas is Alīgūdarz (44 km away). In December its highs average 5.1°C, 3.6°C cooler than Khomeyn, with 41 mm of rain.
Among the 128 cities listed in Iran, Khomeyn ranks joint 76th of 128 for the warmest December highs and 38th of 128 for the driest December (rainfall, lowest first). The mean December high of those 128 cities is 10.9°C; Khomeyn is 2.2°C cooler than that mean.
From December to January, average highs fall by 3.0°C to 5.7°C, and monthly rainfall rises from 28 mm to 30 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
Khomeyn climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.7°C-5.6°C | -5.6°C | 30 | 6.3 | 10.210 h |
| February | 8.2°C-4.1°C | -4.1°C | 32 | 6.3 | 11.011 h |
| March | 13.1°C-0.2°C | -0.2°C | 43 | 7.4 | 12.012 h |
| April | 19.0°C5.3°C | 5.3°C | 37 | 8.4 | 13.013 h |
| May | 25.2°C10.9°C | 10.9°C | 20 | 5.6 | 13.914 h |
| June | 31.8°C16.4°C | 16.4°C | 3.5 | 1.1 | 14.314 h |
| July | 35.0°C20.4°C | 20.4°C | 1.0 | 0.3 | 14.214 h |
| August | 34.1°C19.6°C | 19.6°C | 0.5 | 0.2 | 13.413 h |
| September | 29.6°C14.7°C | 14.7°C | 1.3 | 0.5 | 12.412 h |
| October | 22.4°C8.8°C | 8.8°C | 11 | 3.3 | 11.411 h |
| November | 13.9°C2.2°C | 2.2°C | 25 | 5.1 | 10.510 h |
| December, selected | 8.7°C-2.7°C | -2.7°C | 28 | 5.8 | 10.010 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
- Alīgūdarz in DecemberIran · 44 kmHigh 5.1°C · Low -5.7°C · 41 mm rain
- Arāk in DecemberIran · 62 kmHigh 8.3°C · Low -3.1°C · 31 mm rain
- Dorūd in DecemberIran · 96 kmHigh 8.7°C · Low -0.4°C · 87 mm rain
- Shahrak-e Pardīsān in DecemberIran · 122 kmHigh 10.6°C · Low 1.4°C · 21 mm rain
- Borūjerd in DecemberIran · 126 kmHigh 7.3°C · Low -1.2°C · 67 mm rain
- Kashan in DecemberIran · 130 kmHigh 10.9°C · Low 2.9°C · 25 mm rain
- Qom in DecemberIran · 133 kmHigh 10.8°C · Low 1.8°C · 19 mm rain
- Malāyer in DecemberIran · 137 kmHigh 6.7°C · Low -3.0°C · 47 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 Khomeyn) is explained once on the Khomeyn year overview and on the Sources, method and limits page.