Climate averages 1991–2020
Khomeyn weather
in May.
A warm, fairly dry month: the 5th warmest and the 6th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Khomeyn: daytime highs average 25.2°C and nights cool to about 10.9°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 20 mm of rain on roughly 6 days, which makes May a fairly dry month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 53 min on an average May day.
The nearest other city in this atlas is Alīgūdarz (44 km away). In May its highs average 21.6°C, 3.6°C cooler than Khomeyn, with 16 mm of rain.
Among the 128 cities listed in Iran, Khomeyn ranks joint 75th of 128 for the warmest May highs and 69th of 128 for the driest May (rainfall, lowest first). The mean May high of those 128 cities is 27.8°C; Khomeyn is 2.6°C cooler than that mean.
From May to June, average highs rise by 6.6°C to 31.8°C, and monthly rainfall falls from 20 mm to 3.5 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
Khomeyn climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.7°C-5.6°C | -5.6°C | 30 | 6.3 | 10.210 h |
| February | 8.2°C-4.1°C | -4.1°C | 32 | 6.3 | 11.011 h |
| March | 13.1°C-0.2°C | -0.2°C | 43 | 7.4 | 12.012 h |
| April | 19.0°C5.3°C | 5.3°C | 37 | 8.4 | 13.013 h |
| May, selected | 25.2°C10.9°C | 10.9°C | 20 | 5.6 | 13.914 h |
| June | 31.8°C16.4°C | 16.4°C | 3.5 | 1.1 | 14.314 h |
| July | 35.0°C20.4°C | 20.4°C | 1.0 | 0.3 | 14.214 h |
| August | 34.1°C19.6°C | 19.6°C | 0.5 | 0.2 | 13.413 h |
| September | 29.6°C14.7°C | 14.7°C | 1.3 | 0.5 | 12.412 h |
| October | 22.4°C8.8°C | 8.8°C | 11 | 3.3 | 11.411 h |
| November | 13.9°C2.2°C | 2.2°C | 25 | 5.1 | 10.510 h |
| December | 8.7°C-2.7°C | -2.7°C | 28 | 5.8 | 10.010 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
- Alīgūdarz in MayIran · 44 kmHigh 21.6°C · Low 7.4°C · 16 mm rain
- Arāk in MayIran · 62 kmHigh 24.3°C · Low 10.1°C · 24 mm rain
- Dorūd in MayIran · 96 kmHigh 25.2°C · Low 13.9°C · 24 mm rain
- Shahrak-e Pardīsān in MayIran · 122 kmHigh 30.3°C · Low 16.9°C · 9.5 mm rain
- Borūjerd in MayIran · 126 kmHigh 24.3°C · Low 12.9°C · 37 mm rain
- Kashan in MayIran · 130 kmHigh 29.8°C · Low 16.7°C · 13 mm rain
- Qom in MayIran · 133 kmHigh 31.0°C · Low 17.7°C · 8.8 mm rain
- Malāyer in MayIran · 137 kmHigh 23.2°C · Low 10.5°C · 26 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 Khomeyn) is explained once on the Khomeyn year overview and on the Sources, method and limits page.