Climate averages 1991–2020
Lāhījān weather
in September.
A warm, wet month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Lāhījān: daytime highs average 25.2°C and nights cool to about 18.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 158 mm of rain on roughly 14 days, which makes September a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 27 min on an average September day.
The nearest other city in this atlas is Rasht (38 km away). In September its highs average 24.6°C, 0.7°C cooler than Lāhījān, with 189 mm of rain.
Among the 128 cities listed in Iran, Lāhījān ranks 119th of 128 for the warmest September highs and 126th of 128 for the driest September (rainfall, lowest first). The mean September high of those 128 cities is 31.0°C; Lāhījān is 5.8°C cooler than that mean.
From September to October, average highs fall by 3.5°C to 21.7°C, and monthly rainfall rises from 158 mm to 174 mm.
The annual picture
September 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, selected | 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 | 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
September in nearby cities
- Rasht in SeptemberIran · 38 kmHigh 24.6°C · Low 18.3°C · 189 mm rain
- Bandar-e Anzalī in SeptemberIran · 57 kmHigh 24.5°C · Low 22.0°C · 151 mm rain
- Qazvin in SeptemberIran · 104 kmHigh 28.2°C · Low 15.5°C · 4.3 mm rain
- Moḩammadīyeh in SeptemberIran · 110 kmHigh 28.4°C · Low 14.9°C · 2.3 mm rain
- Alvand in SeptemberIran · 113 kmHigh 29.0°C · Low 14.9°C · 4.3 mm rain
- Tākestān in SeptemberIran · 129 kmHigh 29.2°C · Low 14.2°C · 2.0 mm rain
- Chālūs in SeptemberIran · 140 kmHigh 24.2°C · Low 21.1°C · 148 mm rain
- Zanjan in SeptemberIran · 147 kmHigh 25.6°C · Low 11.9°C · 7.9 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.