Climate averages 1991–2020

Iranshahr weather
in May.

A very hot, very dry month: the 4th warmest and the 2nd driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 39.4°C Daytime mean, May
Average low 23.5°C Night-time mean, May
Rainfall <1 mm Almost no rain
Daylight 13 h Sunrise to sunset, per day
Every month in Iranshahr · average highYear overview

May is a very hot month in Iranshahr: daytime highs average 39.4°C and nights cool to about 23.5°C. By daytime temperature it is the 4th warmest of the 12 months.

Rain is very rare: less than 1 mm falls in a typical May (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 28 min on an average May day.

The nearest other city in this atlas is Zahedan (256 km away). In May its highs average 32.5°C, 6.9°C cooler than Iranshahr, with 2.6 mm of rain.

Among the 128 cities listed in Iran, Iranshahr ranks 7th of 128 for the warmest May highs and 1st of 128 for the driest May (rainfall, lowest first). The mean May high of those 128 cities is 27.8°C; Iranshahr is 11.6°C warmer than that mean.

From May to June, average highs rise by 2.9°C to 42.2°C, and monthly rainfall rises from under 1 mm to 1.2 mm.

The annual picture

May in context

30-year average
Average highAverage low°C
Average daily high and low temperatures by month The same values are available in the monthly table below. Lines show mean daily maxima and minima, not a forecast interval. 51015202530354045 JanFebMarAprMayJunJulAugSepOctNovDec

Monthly rainfall

Average total · mm
Average monthly rainfall totalsEach bar is a mean monthly total over 1991–2020. Full numbers are in the table. JanFebMarAprMayJunJulAugSepOctNovDec 500

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Iranshahr climate table

1991–2020
Monthly climate averages for Iranshahr, 1991–2020
MonthAverage highHigh / lowAverage lowRainfall mm/monthRain days ≥1 mm/dayDaylight hours/dayDay­light h/day
January 20.1°C7.1°C7.1°C212.910.611 h
February 23.0°C9.3°C9.3°C172.711.211 h
March 27.5°C13.3°C13.3°C202.912.012 h
April 34.0°C18.6°C18.6°C4.30.612.813 h
May, selected 39.4°C23.5°C23.5°C0.30.113.513 h
June 42.2°C26.4°C26.4°C1.20.313.814 h
July 42.2°C27.5°C27.5°C1.80.513.714 h
August 41.0°C26.0°C26.0°C1.10.413.113 h
September 38.3°C22.3°C22.3°C0.10.012.312 h
October 33.6°C18.0°C18.0°C2.50.311.512 h
November 27.1°C12.4°C12.4°C2.70.710.811 h
December 22.3°C8.2°C8.2°C101.610.510 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

Distance from Iranshahr

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 limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Iranshahr) is explained once on the Iranshahr year overview and on the Sources, method and limits page.