Climate averages 1991–2020
Hamadān weather
in May.
A warm, fairly dry month: the 5th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Hamadān: daytime highs average 23.8°C and nights cool to about 11.9°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 39 mm of rain on roughly 9 days, which makes May a fairly dry month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 58 min on an average May day.
The nearest other city in this atlas is Malāyer (62 km away). In May its highs average 23.2°C, 0.6°C cooler than Hamadān, with 26 mm of rain.
Among the 128 cities listed in Iran, Hamadān ranks joint 94th of 128 for the warmest May highs and 107th of 128 for the driest May (rainfall, lowest first). The mean May high of those 128 cities is 27.8°C; Hamadān is 4.1°C cooler than that mean.
From May to June, average highs rise by 7.2°C to 30.9°C, and monthly rainfall falls from 39 mm to 4.9 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
Hamadān climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.6°C-4.6°C | -4.6°C | 48 | 9.0 | 10.110 h |
| February | 5.5°C-3.3°C | -3.3°C | 55 | 9.8 | 10.911 h |
| March | 11.4°C1.1°C | 1.1°C | 77 | 12.0 | 11.912 h |
| April | 17.6°C6.3°C | 6.3°C | 69 | 13.2 | 13.013 h |
| May, selected | 23.8°C11.9°C | 11.9°C | 39 | 9.3 | 14.014 h |
| June | 30.9°C17.5°C | 17.5°C | 4.9 | 1.5 | 14.414 h |
| July | 34.9°C20.9°C | 20.9°C | 1.6 | 0.5 | 14.214 h |
| August | 34.4°C20.8°C | 20.8°C | 1.4 | 0.6 | 13.513 h |
| September | 29.4°C16.6°C | 16.6°C | 2.0 | 0.7 | 12.412 h |
| October | 21.9°C10.6°C | 10.6°C | 26 | 5.8 | 11.311 h |
| November | 12.8°C3.5°C | 3.5°C | 49 | 8.2 | 10.410 h |
| December | 7.0°C-1.3°C | -1.3°C | 48 | 7.8 | 9.910 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
- Malāyer in MayIran · 62 kmHigh 23.2°C · Low 10.5°C · 26 mm rain
- Nahāvand in MayIran · 69 kmHigh 23.2°C · Low 11.7°C · 31 mm rain
- Qorveh in MayIran · 76 kmHigh 21.9°C · Low 7.8°C · 23 mm rain
- Borūjerd in MayIran · 103 kmHigh 24.3°C · Low 12.9°C · 37 mm rain
- Arāk in MayIran · 134 kmHigh 24.3°C · Low 10.1°C · 24 mm rain
- Kermanshah in MayIran · 143 kmHigh 24.9°C · Low 12.1°C · 30 mm rain
- Khorramabad in MayIran · 147 kmHigh 27.1°C · Low 13.4°C · 22 mm rain
- Sanandaj in MayIran · 149 kmHigh 23.6°C · Low 10.9°C · 29 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 Hamadān) is explained once on the Hamadān year overview and on the Sources, method and limits page.