Climate averages 1991–2020
Alvand weather
in December.
A cold, moderately wet 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 cold month in Alvand: daytime highs average 7.5°C and nights cool to about -1.7°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 48 mm of rain on roughly 9 days, which makes December a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 45 min on an average December day.
The nearest other city in this atlas is Qazvin (10 km away). In December its highs average 6.7°C, 0.7°C cooler than Alvand, with 48 mm of rain.
Among the 128 cities listed in Iran, Alvand ranks joint 90th of 128 for the warmest December highs and joint 85th of 128 for the driest December (rainfall, lowest first). The mean December high of those 128 cities is 10.9°C; Alvand is 3.4°C cooler than that mean.
From December to January, average highs fall by 2.4°C to 5.1°C, and monthly rainfall falls from 48 mm to 47 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
Alvand 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-4.5°C | -4.5°C | 47 | 8.1 | 10.010 h |
| February | 7.2°C-3.2°C | -3.2°C | 57 | 9.2 | 10.811 h |
| March | 12.8°C0.9°C | 0.9°C | 72 | 11.0 | 11.912 h |
| April | 19.0°C6.2°C | 6.2°C | 74 | 11.1 | 13.113 h |
| May | 24.8°C11.1°C | 11.1°C | 33 | 8.3 | 14.114 h |
| June | 30.6°C15.4°C | 15.4°C | 7.4 | 2.0 | 14.615 h |
| July | 33.5°C18.1°C | 18.1°C | 4.4 | 1.3 | 14.414 h |
| August | 33.4°C18.2°C | 18.2°C | 3.0 | 0.7 | 13.514 h |
| September | 29.0°C14.9°C | 14.9°C | 4.3 | 1.2 | 12.412 h |
| October | 21.9°C9.6°C | 9.6°C | 30 | 5.4 | 11.311 h |
| November | 13.0°C2.9°C | 2.9°C | 55 | 8.1 | 10.310 h |
| December, selected | 7.5°C-1.7°C | -1.7°C | 48 | 8.5 | 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
December in nearby cities
- Qazvin in DecemberIran · 10 kmHigh 6.7°C · Low -1.1°C · 48 mm rain
- Moḩammadīyeh in DecemberIran · 11 kmHigh 7.2°C · Low -1.7°C · 42 mm rain
- Tākestān in DecemberIran · 36 kmHigh 7.8°C · Low -2.0°C · 34 mm rain
- Naz̧arābād in DecemberIran · 55 kmHigh 7.7°C · Low -1.4°C · 40 mm rain
- Mehestan in DecemberIran · 65 kmHigh 5.8°C · Low -3.4°C · 34 mm rain
- Kamālshahr in DecemberIran · 81 kmHigh 7.5°C · Low -2.9°C · 38 mm rain
- Moḩammad Shahr in DecemberIran · 90 kmHigh 8.0°C · Low -2.9°C · 37 mm rain
- Karaj in DecemberIran · 92 kmHigh 7.5°C · Low -3.3°C · 37 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 Alvand) is explained once on the Alvand year overview and on the Sources, method and limits page.
Qazvin lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.