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Monthly climate in Heris, Iran

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Heris features a humid continental climate (Dsb). Temperatures typically range between -6 °C (22 °F) and 22 °C (72 °F) through the year, but rarely can drop to -27 °C (-16 °F) or can rise to as high as 37 °C (98 °F). The average annual precipitation amounts to about 429 mm (16.9 inches) and receives 82 rainy days on the 1 mm (0.04 inches) threshold annually. Heris enjoys an average of 3909 hours of sunshine throughout the year, and daylight varies from 9 hours 32 minutes to 14 hours 46 minutes per day.

Monthly average temperatures in Heris, Iran

The warmest months in Heris are June, July and August, with daily mean temperatures ranging from 20 to 22 °C (68 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -1 °C (22 - 31 °F) throughout the day. On average each year, Heris experiences 89 days above 25 °C (77.0 °F) and 127 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Heris. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(56°F)		16°C
(60°F)		22°C
(71°F)		25°C
(77°F)		30°C
(87°F)		34°C
(94°F)		37°C
(98°F)		35°C
(95°F)		34°C
(94°F)		27°C
(81°F)		21°C
(70°F)		15°C
(59°F)
Mean maximum7°C
(45°F)		11°C
(52°F)		17°C
(63°F)		22°C
(71°F)		28°C
(82°F)		32°C
(90°F)		36°C
(97°F)		34°C
(93°F)		32°C
(90°F)		25°C
(77°F)		17°C
(63°F)		11°C
(53°F)
Average high1°C
(34°F)		4°C
(39°F)		10°C
(50°F)		15°C
(60°F)		21°C
(70°F)		28°C
(82°F)		30°C
(86°F)		29°C
(84°F)		26°C
(79°F)		19°C
(66°F)		10°C
(51°F)		5°C
(42°F)
Daily mean-6°C
(22°F)		-2°C
(28°F)		4°C
(39°F)		9°C
(48°F)		14°C
(57°F)		20°C
(68°F)		22°C
(72°F)		21°C
(70°F)		18°C
(64°F)		11°C
(52°F)		4°C
(39°F)		-1°C
(31°F)
Average low-11°C
(12°F)		-8°C
(18°F)		-2°C
(29°F)		2°C
(36°F)		7°C
(46°F)		12°C
(54°F)		15°C
(60°F)		14°C
(57°F)		11°C
(51°F)		4°C
(40°F)		-1°C
(31°F)		-5°C
(24°F)
Mean minimum-20°C
(-4°F)		-17°C
(1°F)		-9°C
(16°F)		-4°C
(25°F)		3°C
(37°F)		8°C
(47°F)		11°C
(52°F)		11°C
(51°F)		5°C
(41°F)		-2°C
(29°F)		-7°C
(20°F)		-14°C
(8°F)
Minimum-27°C
(-16°F)		-22°C
(-8°F)		-17°C
(1°F)		-8°C
(18°F)		1°C
(34°F)		6°C
(44°F)		9°C
(48°F)		6°C
(43°F)		3°C
(37°F)		-6°C
(22°F)		-9°C
(16°F)		-24°C
(-11°F)

Compare climate in Heris with other places

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

Monthly average precipitation in Heris, Iran

Heris usually has the most precipitation in February, March and April, with an average of 11 rainy days and 66 mm (2.6 inches) of precipitation per month. The driest months in Heris are July, August and September. On average, 9 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Heris. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)31 (1.2)56 (2.2)65 (2.6)77 (3.0)49 (1.9)15 (0.6)11 (0.4)8 (0.3)9 (0.4)32 (1.3)35 (1.4)42 (1.7)
Average precipitation days (≥ 1 mm)691213114212688

Monthly sunshine hours in Heris, Iran

The sunniest months in Heris are May, June and July, when the sun shines an average of 13 hours 9 minutes a day. Least sunny months in Heris: January, November and December receive an average of 7 hours 57 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Heris. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours215266317335394403412393342312259257
Mean daily daylight hours9h 49m10h 45m11h 57m13h 12m14h 14m14h 46m14h 29m13h 34m12h 23m11h 9m10h 5m9h 32m

Solar UV radiation in Heris, Iran

Heris experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 12 - 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 Heris UV Index data.

Average daily maximum UV levels by month for Heris. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)45109121212119743