Arak climate
Arak (Iran) has a cold semi-arid climate (Köppen BSk). The average temperature over the year is 14 °C57 °F, and about 219 mm8.6 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Arak climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 643 | −524 | 134 | 271.1 |
| Feb | 948 | −326 | 337 | 220.9 |
| Mar | 1558 | 032 | 745 | 341.3 |
| Apr | 2067 | 541 | 1254 | 411.6 |
| May | 2679 | 1050 | 1865 | 150.6 |
| Jun | 3493 | 1560 | 2576 | 80.3 |
| Jul | 3798 | 1966 | 2882 | 10.0 |
| Aug | 3595 | 1864 | 2780 | 00.0 |
| Sep | 3187 | 1457 | 2272 | 10.0 |
| Oct | 2373 | 847 | 1660 | 140.5 |
| Nov | 1356 | 133 | 745 | 271.1 |
| Dec | 847 | −327 | 337 | 281.1 |
| Year | 3798 | −524 | 1457 | 2198.6 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 68% | 56% | 2.8 | 10:07 |
| Feb | 64% | 55% | 3.8 | 10:55 |
| Mar | 58% | 53% | 4.9 | 11:53 |
| Apr | 56% | 55% | 5.8 | 12:00 |
| May | 44% | 44% | 7.0 | 13:55 |
| Jun | 26% | 23% | 8.2 | 14:25 |
| Jul | 21% | 27% | 7.7 | 14:13 |
| Aug | 20% | 23% | 7.3 | 13:25 |
| Sep | 23% | 24% | 6.3 | 12:20 |
| Oct | 37% | 38% | 4.6 | 11:16 |
| Nov | 58% | 46% | 3.2 | 10:20 |
| Dec | 66% | 47% | 2.6 | 9:53 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Arak is like
The warmest month is July, with an average high of 37 °C98 °F and a low of 19 °C66 °F. The coldest is January, when highs average 6 °C43 °F and lows −5 °C24 °F. Seasons are strongly marked: the warmest month is on average 26.9 °C48.4 °F warmer than the coldest.
It is dry, with about 219 mm8.6 in of precipitation per year. The wettest three-month stretch is February–April, which brings 44% of the annual total. Months with less than 20 mm0.8 in on average: May–October. The wettest month is April (41 mm1.6 in), the driest is August (0 mm0.0 in).
Relative humidity ranges from 20% in August to 68% in January. The clearest skies (lowest average cloud amount, 23%) are typical of August. Average wind speed near the ground ranges from 8 km/h (5 mph) in November to 12 km/h (7 mph) in March. Daylight lasts from about 9.9 hours in December to 14.4 hours in June.
A lasting snow cover is typical in December–February, when the average snow depth in the reanalysis exceeds 10 cm (deepest in January, about 13 cm).
Best time to visit Arak
Based on these averages, the most comfortable months for sightseeing and outdoor activities are April and May and October: average highs of 20 °C67 °F to 26 °C79 °F with 14 mm0.5 in to 41 mm1.6 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 6 °C43 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Arak
- Winter (December–February) — highs 643 to 9 °C48 °F, lows −524 to −3 °C27 °F, about 26 mm1.0 in of precipitation a month. Pack a warm coat, layers and closed shoes, an extra layer for the cooler mornings and evenings and shoes with good grip, as frost is common.
- Spring (March–May) — highs 1558 to 26 °C79 °F, lows 032 to 10 °C50 °F, about 30 mm1.2 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 3493 to 37 °C98 °F, lows 1560 to 19 °C66 °F, about 3 mm0.1 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 1356 to 31 °C87 °F, lows 133 to 14 °C57 °F, about 14 mm0.6 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
How Arak compares
Compared with Qom, about 124 km to the northeast, Arak is on average 5 °C8.9 °F cooler and receives 6% more precipitation (219 mm8.6 in vs 207 mm8.1 in). The difference is largest in May (6.1 °C10.9 °F cooler).
Of the 82 places in Iran covered by World Climates, Arak is the 62nd warmest by annual mean temperature and the 52nd wettest by annual precipitation. See all of them on the Iran climate page.
Places in other countries with the most similar temperature and rainfall pattern: Istaravshan (Tajikistan, BSk), Samarkand (Uzbekistan, BSk) and Angren (Uzbekistan, Csa).
Nearby places
- Malayer 84 km · 13 °C56 °F · 303 mm12 in
- Dorud 89 km · 16 °C62 °F · 350 mm14 in
- Borujerd 90 km · 15 °C59 °F · 324 mm13 in
- Saveh 119 km · 18 °C65 °F · 248 mm9.8 in
- Qom 124 km · 19 °C66 °F · 207 mm8.1 in
- Hamadan 134 km · 12 °C54 °F · 284 mm11 in
- Khorramabad 141 km · 18 °C65 °F · 357 mm14 in
- Kashan 160 km · 20 °C67 °F · 156 mm6.2 in
Frequently asked questions
What is the warmest month in Arak?
July is the warmest month in Arak, with an average high of 37 °C (98 °F) and an average low of 19 °C (66 °F).
What is the coldest month in Arak?
January is the coldest month, with an average high of 6 °C (43 °F) and an average low of -5 °C (24 °F).
When does it rain the most in Arak?
April is the wettest month with about 41 mm (1.6 in) of precipitation; August is the driest with about 0 mm (0.0 in).
What is the best time to visit Arak?
Judging by long-term averages, the most comfortable months are April and May and October.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 2,016 m, while Arak lies at about 1,738 m. Temperatures on this page were therefore adjusted by +1.8 °C3.3 °F using the standard lapse rate of 6.5 °C per 1,000 m.