Climate averages 1991–2020

Orūmīyeh weather
by month.

See how the year changes. July has the highest average daily maximum; August has the lowest average monthly rainfall.

Pleasant-weather months by our simple rule: JuneSeptemberOctober

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

Warmest month 30.3°C July, average high
Coolest month -5.6°C January, average low
Wettest month 59 mm March, monthly total
Driest month 4.7 mm August, monthly total
The year at a glance · average highYear overview

Across the year Orūmīyeh averages a daytime high of 16.7°C and a nighttime low of 6.7°C, with about 371 mm of rain on roughly 65 days. July is the warmest month (average high 30.3°C) and January the coolest (2.4°C). March is the wettest month with 59 mm; August is the driest with 4.7 mm.

Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): June, September and October. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.

The annual picture

A year in Orūmīyeh

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. -10-505101520253035 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 1000

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

Every month, side by side

Orūmīyeh climate table

1991–2020
Monthly climate averages for Orūmīyeh, 1991–2020
MonthAverage highHigh / lowAverage lowRainfall mm/monthRain days ≥1 mm/dayDaylight hours/dayDay­light h/day
January 2.4°C-5.6°C-5.6°C416.69.910 h
February 4.1°C-4.5°C-4.5°C436.910.811 h
March 9.3°C-0.6°C-0.6°C598.911.912 h
April 15.7°C4.6°C4.6°C478.213.113 h
May 21.3°C9.9°C9.9°C418.414.214 h
June 27.1°C15.2°C15.2°C132.714.715 h
July 30.3°C19.2°C19.2°C5.91.414.514 h
August 30.2°C19.1°C19.1°C4.71.413.614 h
September 25.8°C14.7°C14.7°C9.02.212.512 h
October 19.0°C9.2°C9.2°C264.911.311 h
November 10.7°C2.2°C2.2°C416.910.210 h
December 4.9°C-3.0°C-3.0°C407.09.610 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

Nearby cities

Distance from Orūmīyeh

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
What do the high and low temperatures mean?

We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.

How is a rain day counted?

A local calendar day (standard time, UTC+3:30, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.

Where do the numbers come from?

ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 37.60°, 45.10° (6 km from the city centre), adjusted down by 0.1°C for the difference between the city's elevation (1,350 m) and the cell's (1,342 m). Rain comes from the 0.25° cell at 37.50°, 45.00°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.

Does this page show sunshine, humidity or sea temperature?

No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.