Climate averages 1991–2020
Zanjan weather
in September.
A warm, very dry month: the 4th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Zanjan: daytime highs average 25.6°C and nights cool to about 11.9°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 7.9 mm of rain on roughly 2 days, which makes September a very dry month (the 2nd 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 Mīāneh (108 km away). In September its highs average 29.1°C, 3.6°C warmer than Zanjan, with 5.9 mm of rain.
Among the 128 cities listed in Iran, Zanjan ranks 117th of 128 for the warmest September highs and 110th of 128 for the driest September (rainfall, lowest first). The mean September high of those 128 cities is 31.0°C; Zanjan is 5.5°C cooler than that mean.
From September to October, average highs fall by 6.4°C to 19.1°C, and monthly rainfall rises from 7.9 mm to 35 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
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, selected | 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 | 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
September in nearby cities
- Mīāneh in SeptemberIran · 108 kmHigh 29.1°C · Low 14.9°C · 5.9 mm rain
- Rasht in SeptemberIran · 118 kmHigh 24.6°C · Low 18.3°C · 189 mm rain
- Bandar-e Anzalī in SeptemberIran · 123 kmHigh 24.5°C · Low 22.0°C · 151 mm rain
- Tākestān in SeptemberIran · 127 kmHigh 29.2°C · Low 14.2°C · 2.0 mm rain
- Qazvin in SeptemberIran · 142 kmHigh 28.2°C · Low 15.5°C · 4.3 mm rain
- Lāhījān in SeptemberIran · 147 kmHigh 25.2°C · Low 18.6°C · 158 mm rain
- Alvand in SeptemberIran · 150 kmHigh 29.0°C · Low 14.9°C · 4.3 mm rain
- Moḩammadīyeh in SeptemberIran · 159 kmHigh 28.4°C · Low 14.9°C · 2.3 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.