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Monthly climate in Karaj, Iran

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Karaj features a hot-summer Mediterranean climate (Csa).Temperatures typically range between 1 °C (35 °F) and 29 °C (85 °F) through the year, but rarely can drop to -15 °C (5 °F) or can rise to as high as 40 °C (104 °F).The average annual precipitation amounts to about 316 mm (12.5 inches) and receives 52 rainy days on the 1 mm (0.04 inches) threshold annually.Karaj enjoys an average of 3899 hours of sunshine throughout the year, and daylight varies from 9 hours 46 minutes to 14 hours 31 minutes per day.

Monthly average temperatures in Karaj, Iran §

The warmest months in Karaj are June, July and August, with daily mean temperatures ranging from 27 to 29 °C (80 - 85 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 4 °C (35 - 39 °F) throughout the day. On average each year, Karaj experiences 129 days above 25 °C (77.0 °F) and 65 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Karaj, Iran.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 14°C
(58°F)		 16°C
(61°F)		 26°C
(79°F)		 29°C
(84°F)		 34°C
(93°F)		 38°C
(100°F)		 40°C
(104°F)		 39°C
(102°F)		 36°C
(96°F)		 29°C
(85°F)		 23°C
(74°F)		 17°C
(62°F)
Mean maximum 11°C
(53°F)		 13°C
(56°F)		 19°C
(67°F)		 25°C
(78°F)		 32°C
(90°F)		 36°C
(97°F)		 39°C
(102°F)		 38°C
(100°F)		 35°C
(94°F)		 28°C
(83°F)		 20°C
(68°F)		 14°C
(57°F)
Average high 7°C
(44°F)		 8°C
(47°F)		 13°C
(56°F)		 19°C
(67°F)		 26°C
(79°F)		 33°C
(92°F)		 36°C
(97°F)		 34°C
(94°F)		 30°C
(87°F)		 22°C
(72°F)		 13°C
(55°F)		 9°C
(48°F)
Daily mean 1°C
(35°F)		 3°C
(38°F)		 8°C
(47°F)		 14°C
(57°F)		 20°C
(68°F)		 27°C
(80°F)		 29°C
(85°F)		 28°C
(82°F)		 24°C
(75°F)		 16°C
(61°F)		 8°C
(47°F)		 4°C
(39°F)
Average low -3°C
(27°F)		 -2°C
(29°F)		 4°C
(39°F)		 9°C
(48°F)		 14°C
(57°F)		 19°C
(67°F)		 22°C
(73°F)		 21°C
(70°F)		 17°C
(63°F)		 10°C
(51°F)		 4°C
(39°F)		 -0°C
(32°F)
Mean minimum -11°C
(13°F)		 -10°C
(15°F)		 -2°C
(29°F)		 1°C
(35°F)		 9°C
(48°F)		 15°C
(59°F)		 18°C
(65°F)		 17°C
(64°F)		 12°C
(54°F)		 5°C
(42°F)		 -2°C
(29°F)		 -4°C
(24°F)
Minimum -14°C
(7°F)		 -15°C
(5°F)		 -5°C
(23°F)		 -1°C
(31°F)		 7°C
(45°F)		 13°C
(55°F)		 17°C
(62°F)		 14°C
(58°F)		 11°C
(53°F)		 4°C
(40°F)		 -4°C
(26°F)		 -9°C
(16°F)

Compare climate in Karaj with other places

Compare temperature, precipitation, sunshine, UV index in Karaj, Iran with other places around the world.

Monthly average precipitation in Karaj, Iran §

Karaj usually has the most precipitation in February, March and April, with an average of 8 rainy days and 53 mm (2.1 inches) of precipitation per month.The driest months in Karaj are July, August and September. On average, 1 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Karaj, Iran.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 34 (1.3) 56 (2.2) 49 (1.9) 54 (2.1) 24 (1.0) 4 (0.1) 2 (0.1) 0 (0.0) 1 (0.0) 20 (0.8) 39 (1.5) 33 (1.3)
Average precipitation days (≥ 1 mm) 5 8 9 9 5 0 0 0 0 4 6 6

Monthly sunshine hours in Karaj, Iran §

The sunniest months in Karaj are May, June and July, when the sun shines an average of 12 hours 48 minutes a day.Least sunny months in Karaj: January, February and November receive an average of 8 hours 24 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Karaj, Iran.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 227 268 321 336 383 396 398 379 343 311 260 270
Mean daily daylight hours 10h 1m 10h 52m 11h 58m 13h 6m 14h 3m 14h 31m 14h 16m 13h 26m 12h 22m 11h 14m 10h 16m 9h 46m

Solar UV radiation in Karaj, Iran §

Karaj experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Karaj UV Index data.

Average daily maximum UV levels by month for Karaj, Iran.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 4 5 8 9 12 12 11 10 10 7 4 3