Arāk climate
Arāk is warmest in July, with average highs of 34 °C, and coldest in January, when nights average -6.6 °C. March is the wettest month (51 mm) and August the driest (0.7 mm). Figures are 1991–2020 climate normals.
Across a full year Arāk averages 263 mm of rain, 139 days above 25 °C and 113 days below freezing.
Iran · population 503,647 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month July 34 °C
- Coldest month January -6.6 °C
- Driest month August 1 mm
- Wettest month March 51 mm
- Least cloud September 8 % cloud
- Hottest on record July 39 °C
- Coldest on record January -27 °C
What to expectArāk through the year
Arāk has a clear annual cycle: average daily highs run from 5.0 °C in January to 34 °C in July, a swing of 28 °C in mean temperature across the year.
Counted across a normal year, 139 days a year reach 25 °C, 88 of them reach 30 °C, 113 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in July.
Rain is strongly seasonal. March averages 51 mm against 1 mm in August — 69 times as much. Planning around the dry months matters more here than planning around temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 5.0 °C | 32 mm | 46 % |
| February | 7.4 °C | 33 mm | 42 % |
| March | 12.6 °C | 51 mm | 44 % |
| April | 18.4 °C | 42 mm | 45 % |
| May | 24.3 °C | 23 mm | 33 % |
| June | 30.7 °C | 4 mm | 13 % |
| July | 33.9 °C | 1 mm | 16 % |
| August | 33.1 °C | 1 mm | 13 % |
| September | 28.7 °C | 1 mm | 8 % |
| October | 21.6 °C | 14 mm | 25 % |
| November | 13.1 °C | 31 mm | 41 % |
| December | 8.1 °C | 32 mm | 45 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | 5.0 °C | -6.6 °C | -1.2 °C | 16.4 °C | -26.7 °C | 0 | 0 | 30 |
| February | 7.4 °C | -5.0 °C | 1.0 °C | 19.8 °C | -24.0 °C | 0 | 0 | 26 |
| March | 12.6 °C | -0.8 °C | 6.1 °C | 26.6 °C | -22.3 °C | 0 | 0 | 18 |
| April | 18.4 °C | 4.5 °C | 11.8 °C | 27.8 °C | -10.9 °C | 1 | 0 | 2 |
| May | 24.3 °C | 10.0 °C | 17.7 °C | 33.1 °C | 0.7 °C | 14 | 1 | 0 |
| June | 30.7 °C | 15.8 °C | 23.9 °C | 38.2 °C | 8.4 °C | 29 | 19 | 0 |
| July | 33.9 °C | 19.8 °C | 27.3 °C | 39.2 °C | 13.9 °C | 31 | 29 | 0 |
| August | 33.1 °C | 18.9 °C | 26.4 °C | 38.2 °C | 10.0 °C | 31 | 29 | 0 |
| September | 28.7 °C | 14.0 °C | 21.6 °C | 34.5 °C | 5.8 °C | 27 | 11 | 0 |
| October | 21.6 °C | 7.9 °C | 14.7 °C | 29.2 °C | 0.4 °C | 6 | 0 | 0 |
| November | 13.1 °C | 1.3 °C | 6.9 °C | 22.5 °C | -9.7 °C | 0 | 0 | 10 |
| December | 8.1 °C | -3.4 °C | 1.8 °C | 20.7 °C | -17.6 °C | 0 | 0 | 27 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 32 mm | 6 | 10 h/day | 46 % | 68 % | 13 km/h |
| February | 33 mm | 6 | 11 h/day | 42 % | 64 % | 16 km/h |
| March | 51 mm | 8 | 12 h/day | 44 % | 59 % | 18 km/h |
| April | 42 mm | 8 | 13 h/day | 45 % | 53 % | 19 km/h |
| May | 23 mm | 5 | 14 h/day | 33 % | 40 % | 18 km/h |
| June | 4 mm | 1 | 14 h/day | 13 % | 25 % | 16 km/h |
| July | 1 mm | 0 | 14 h/day | 16 % | 23 % | 16 km/h |
| August | 1 mm | 0 | 13 h/day | 13 % | 22 % | 16 km/h |
| September | 1 mm | 0 | 12 h/day | 8 % | 26 % | 15 km/h |
| October | 14 mm | 3 | 11 h/day | 25 % | 42 % | 14 km/h |
| November | 31 mm | 6 | 10 h/day | 41 % | 61 % | 13 km/h |
| December | 32 mm | 6 | 9.9 h/day | 45 % | 66 % | 12 km/h |
How Arāk compares
The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.
| Destination | Summer high | Winter low | Rain per year | Days above 25 °C |
|---|---|---|---|---|
| Arāk | 34 °C | -6.6 °C | 263 mm | 139 |
| Malāyer · Iran | 34 °C | -6.9 °C | 361 mm | 133 |
| Borūjerd · Iran | 35 °C | -5.2 °C | 512 mm | 145 |
| Sāveh · Iran | 38 °C | -2.2 °C | 227 mm | 179 |
| Qom · Iran | 39 °C | -0.7 °C | 143 mm | 187 |
| Hamadān · Iran | 35 °C | -4.9 °C | 410 mm | 137 |
| Khorramabad · Iran | 38 °C | -3.0 °C | 573 mm | 169 |
Planning a trip? See the best time to visit Arāk.
QuestionsCommon questions about Arāk’s climate
When is the best time to visit Arāk?
That depends on what you want, so the honest answer is a comparison rather than a single month. May, June, September sit closest to 20 °C on average, July is the warmest month and August the driest. The month-by-month table above has the full picture.
How hot does Arāk get?
In July, the warmest month, daily highs average 34 °C. About 88 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.
How cold does it get in winter?
Nights average -6.6 °C in January, the coldest month. A normal year has 113 nights below freezing.
Which month is wettest in Arāk?
March, averaging 51 mm over 8 days with rain. The driest month is August with 1 mm. The year as a whole averages 263 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Arāk rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.