Climate averages 1991–2020
Lāhījān weather
in December.
A cool, wet month: the 10th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Lāhījān: daytime highs average 13.4°C and nights cool to about 4.6°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 124 mm of rain on roughly 12 days, which makes December a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 39 min on an average December day.
The nearest other city in this atlas is Rasht (38 km away). In December its highs average 12.5°C, 1.0°C cooler than Lāhījān, with 136 mm of rain.
Among the 128 cities listed in Iran, Lāhījān ranks joint 36th of 128 for the warmest December highs and 120th of 128 for the driest December (rainfall, lowest first). The mean December high of those 128 cities is 10.9°C; Lāhījān is 2.5°C warmer than that mean.
From December to January, average highs fall by 1.9°C to 11.6°C, and monthly rainfall falls from 124 mm to 116 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
Lāhījān climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 11.6°C2.3°C | 2.3°C | 116 | 12.2 | 9.910 h |
| February | 11.6°C2.3°C | 2.3°C | 122 | 12.3 | 10.811 h |
| March | 14.8°C5.5°C | 5.5°C | 115 | 13.2 | 11.912 h |
| April | 18.8°C9.6°C | 9.6°C | 81 | 10.6 | 13.113 h |
| May | 23.1°C14.3°C | 14.3°C | 50 | 8.6 | 14.114 h |
| June | 26.7°C18.5°C | 18.5°C | 64 | 8.4 | 14.715 h |
| July | 28.5°C21.2°C | 21.2°C | 72 | 9.9 | 14.514 h |
| August | 28.9°C21.5°C | 21.5°C | 84 | 11.5 | 13.614 h |
| September | 25.2°C18.6°C | 18.6°C | 158 | 14.1 | 12.512 h |
| October | 21.7°C14.4°C | 14.4°C | 174 | 14.3 | 11.311 h |
| November | 16.8°C8.9°C | 8.9°C | 168 | 13.6 | 10.210 h |
| December, selected | 13.4°C4.6°C | 4.6°C | 124 | 11.7 | 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
- Rasht in DecemberIran · 38 kmHigh 12.5°C · Low 4.8°C · 136 mm rain
- Bandar-e Anzalī in DecemberIran · 57 kmHigh 12.6°C · Low 9.6°C · 131 mm rain
- Qazvin in DecemberIran · 104 kmHigh 6.7°C · Low -1.1°C · 48 mm rain
- Moḩammadīyeh in DecemberIran · 110 kmHigh 7.2°C · Low -1.7°C · 42 mm rain
- Alvand in DecemberIran · 113 kmHigh 7.5°C · Low -1.7°C · 48 mm rain
- Tākestān in DecemberIran · 129 kmHigh 7.8°C · Low -2.0°C · 34 mm rain
- Chālūs in DecemberIran · 140 kmHigh 12.6°C · Low 9.2°C · 156 mm rain
- Zanjan in DecemberIran · 147 kmHigh 4.9°C · Low -4.4°C · 40 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 Lāhījān) is explained once on the Lāhījān year overview and on the Sources, method and limits page.