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Monthly climate in Zanjan, Iran

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Zanjan features a humid continental climate (Dsb). Temperatures typically range between -2 °C (28 °F) and 22 °C (73 °F) through the year, but rarely can drop to -24 °C (-11 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 529 mm (20.8 inches) and receives 95 rainy days on the 1 mm (0.04 inches) threshold annually. Zanjan enjoys an average of 3850 hours of sunshine throughout the year, and daylight varies from 9 hours 40 minutes to 14 hours 36 minutes per day.

Monthly average temperatures in Zanjan, Iran

The warmest months in Zanjan are June, July and August, with daily mean temperatures ranging from 21 to 22 °C (69 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 1 °C (28 - 34 °F) throughout the day. On average each year, Zanjan experiences 97 days above 25 °C (77.0 °F) and 106 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Zanjan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(58°F)		17°C
(64°F)		25°C
(77°F)		28°C
(82°F)		32°C
(90°F)		36°C
(97°F)		38°C
(101°F)		36°C
(97°F)		35°C
(95°F)		28°C
(83°F)		22°C
(73°F)		18°C
(64°F)
Mean maximum10°C
(50°F)		13°C
(55°F)		19°C
(66°F)		23°C
(74°F)		29°C
(85°F)		34°C
(93°F)		37°C
(99°F)		35°C
(96°F)		33°C
(92°F)		27°C
(81°F)		18°C
(65°F)		12°C
(55°F)
Average high3°C
(38°F)		5°C
(42°F)		11°C
(52°F)		16°C
(62°F)		22°C
(72°F)		29°C
(85°F)		31°C
(88°F)		29°C
(85°F)		27°C
(81°F)		19°C
(67°F)		10°C
(51°F)		6°C
(44°F)
Daily mean-2°C
(28°F)		0°C
(32°F)		5°C
(42°F)		10°C
(50°F)		15°C
(59°F)		21°C
(69°F)		22°C
(73°F)		21°C
(70°F)		18°C
(65°F)		12°C
(54°F)		5°C
(41°F)		1°C
(34°F)
Average low-7°C
(20°F)		-5°C
(24°F)		0°C
(32°F)		4°C
(39°F)		9°C
(48°F)		13°C
(55°F)		15°C
(60°F)		14°C
(57°F)		11°C
(52°F)		6°C
(43°F)		1°C
(34°F)		-3°C
(27°F)
Mean minimum-17°C
(3°F)		-14°C
(7°F)		-6°C
(22°F)		-3°C
(26°F)		5°C
(40°F)		9°C
(48°F)		11°C
(53°F)		10°C
(50°F)		5°C
(41°F)		-0°C
(32°F)		-7°C
(20°F)		-9°C
(16°F)
Minimum-24°C
(-11°F)		-23°C
(-10°F)		-11°C
(13°F)		-5°C
(22°F)		2°C
(36°F)		7°C
(44°F)		8°C
(47°F)		5°C
(42°F)		4°C
(39°F)		-2°C
(29°F)		-9°C
(16°F)		-13°C
(9°F)

Compare climate in Zanjan with other places

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

Monthly average precipitation in Zanjan, Iran

Zanjan usually has the most precipitation in February, March and April, with an average of 12 rainy days and 79 mm (3.1 inches) of precipitation per month. The driest months in Zanjan 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 Zanjan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)42 (1.6)75 (3.0)69 (2.7)92 (3.6)60 (2.4)15 (0.6)11 (0.4)8 (0.3)8 (0.3)37 (1.4)62 (2.5)49 (1.9)
Average precipitation days (≥ 1 mm)71014141343217119

Monthly sunshine hours in Zanjan, Iran

The sunniest months in Zanjan are May, June and July, when the sun shines an average of 12 hours 52 minutes a day. Least sunny months in Zanjan: January, February and November receive an average of 8 hours 7 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Zanjan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours223256312333385400398382340305250260
Mean daily daylight hours9h 57m10h 50m11h 58m13h 8m14h 7m14h 36m14h 21m13h 29m12h 22m11h 12m10h 12m9h 40m

Solar UV radiation in Zanjan, Iran

Zanjan experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 12 - 13, 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 5. For more detailed information, check out our hourly Zanjan UV Index data.

Average daily maximum UV levels by month for Zanjan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)569101312121110754