Climate averages 1991–2020
Zanjan weather
in May.
A mild, moderately wet month: the 5th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Zanjan: daytime highs average 21.8°C and nights cool to about 8.5°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 58 mm of rain on roughly 12 days, which makes May a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 06 min on an average May day.
The nearest other city in this atlas is Mīāneh (108 km away). In May its highs average 25.5°C, 3.7°C warmer than Zanjan, with 35 mm of rain.
Among the 128 cities listed in Iran, Zanjan ranks joint 116th of 128 for the warmest May highs and 122nd of 128 for the driest May (rainfall, lowest first). The mean May high of those 128 cities is 27.8°C; Zanjan is 6.1°C cooler than that mean.
From May to June, average highs rise by 4.8°C to 26.6°C, and monthly rainfall falls from 58 mm to 16 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Mīāneh in MayIran · 108 kmHigh 25.5°C · Low 11.6°C · 35 mm rain
- Rasht in MayIran · 118 kmHigh 22.2°C · Low 13.8°C · 55 mm rain
- Bandar-e Anzalī in MayIran · 123 kmHigh 19.8°C · Low 17.0°C · 29 mm rain
- Tākestān in MayIran · 127 kmHigh 25.8°C · Low 10.8°C · 22 mm rain
- Qazvin in MayIran · 142 kmHigh 24.0°C · Low 11.5°C · 33 mm rain
- Lāhījān in MayIran · 147 kmHigh 23.1°C · Low 14.3°C · 50 mm rain
- Alvand in MayIran · 150 kmHigh 24.8°C · Low 11.1°C · 33 mm rain
- Moḩammadīyeh in MayIran · 159 kmHigh 24.2°C · Low 10.9°C · 19 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.