Climate averages 1991–2020
Zanjan weather
in December.
A cold, moderately wet month: the 10th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Zanjan: daytime highs average 4.9°C and nights cool to about -4.4°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 40 mm of rain on roughly 8 days, which makes December a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 42 min on an average December day.
The nearest other city in this atlas is Mīāneh (108 km away). In December its highs average 7.3°C, 2.4°C warmer than Zanjan, with 34 mm of rain.
Among the 128 cities listed in Iran, Zanjan ranks joint 122nd of 128 for the warmest December highs and joint 69th of 128 for the driest December (rainfall, lowest first). The mean December high of those 128 cities is 10.9°C; Zanjan is 6.0°C cooler than that mean.
From December to January, average highs fall by 2.7°C to 2.2°C, and monthly rainfall rises from 40 mm to 43 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
Zanjan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.2°C-7.2°C | -7.2°C | 43 | 9.0 | 10.010 h |
| February | 4.1°C-6.1°C | -6.1°C | 53 | 10.3 | 10.811 h |
| March | 10.2°C-1.5°C | -1.5°C | 68 | 12.9 | 11.912 h |
| April | 16.5°C3.7°C | 3.7°C | 76 | 13.4 | 13.113 h |
| May | 21.8°C8.5°C | 8.5°C | 58 | 12.4 | 14.114 h |
| June | 26.6°C12.1°C | 12.1°C | 16 | 4.6 | 14.615 h |
| July | 28.5°C13.9°C | 13.9°C | 9.7 | 2.8 | 14.414 h |
| August | 29.1°C14.4°C | 14.4°C | 5.8 | 2.1 | 13.614 h |
| September | 25.6°C11.9°C | 11.9°C | 7.9 | 2.1 | 12.512 h |
| October | 19.1°C7.2°C | 7.2°C | 35 | 6.6 | 11.311 h |
| November | 10.4°C0.5°C | 0.5°C | 55 | 8.6 | 10.310 h |
| December, selected | 4.9°C-4.4°C | -4.4°C | 40 | 7.9 | 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
- Mīāneh in DecemberIran · 108 kmHigh 7.3°C · Low -1.2°C · 34 mm rain
- Rasht in DecemberIran · 118 kmHigh 12.5°C · Low 4.8°C · 136 mm rain
- Bandar-e Anzalī in DecemberIran · 123 kmHigh 12.6°C · Low 9.6°C · 131 mm rain
- Tākestān in DecemberIran · 127 kmHigh 7.8°C · Low -2.0°C · 34 mm rain
- Qazvin in DecemberIran · 142 kmHigh 6.7°C · Low -1.1°C · 48 mm rain
- Lāhījān in DecemberIran · 147 kmHigh 13.4°C · Low 4.6°C · 124 mm rain
- Alvand in DecemberIran · 150 kmHigh 7.5°C · Low -1.7°C · 48 mm rain
- Moḩammadīyeh in DecemberIran · 159 kmHigh 7.2°C · Low -1.7°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 Zanjan) is explained once on the Zanjan year overview and on the Sources, method and limits page.