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Monthly climate in Iisaku, Estonia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Iisaku features a humid continental climate (Dfb). Temperatures typically range between -3 °C (26 °F) and 18 °C (66 °F) through the year, but rarely can drop to -22 °C (-8 °F) or can rise to as high as 30 °C (87 °F). The average annual precipitation amounts to about 812 mm (32.0 inches) and receives 162 rainy days on the 1 mm (0.04 inches) threshold annually. Iisaku enjoys an average of 3253 hours of sunshine throughout the year, and daylight varies from 6 hours 16 minutes to 18 hours 22 minutes per day.

Monthly average temperatures in Iisaku, Estonia

The warmest months in Iisaku are June, July and August, with daily mean temperatures ranging from 17 to 18 °C (63 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to -2 °C (26 - 29 °F) throughout the day. On average each year, Iisaku experiences 12 days above 25 °C (77.0 °F) and 110 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Iisaku. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum7°C
(44°F)		7°C
(45°F)		9°C
(48°F)		18°C
(65°F)		25°C
(77°F)		30°C
(86°F)		30°C
(87°F)		29°C
(85°F)		24°C
(75°F)		17°C
(62°F)		11°C
(52°F)		7°C
(44°F)
Mean maximum4°C
(39°F)		4°C
(39°F)		7°C
(44°F)		14°C
(57°F)		21°C
(71°F)		25°C
(76°F)		27°C
(81°F)		25°C
(77°F)		21°C
(71°F)		14°C
(57°F)		9°C
(49°F)		4°C
(39°F)
Average high-1°C
(30°F)		-2°C
(29°F)		2°C
(35°F)		7°C
(45°F)		14°C
(57°F)		20°C
(69°F)		21°C
(71°F)		20°C
(68°F)		15°C
(60°F)		9°C
(49°F)		4°C
(40°F)		-0°C
(32°F)
Daily mean-3°C
(27°F)		-3°C
(26°F)		-1°C
(30°F)		4°C
(39°F)		11°C
(51°F)		17°C
(63°F)		18°C
(66°F)		17°C
(63°F)		13°C
(55°F)		7°C
(46°F)		3°C
(38°F)		-2°C
(29°F)
Average low-5°C
(24°F)		-5°C
(23°F)		-4°C
(25°F)		0°C
(33°F)		7°C
(45°F)		14°C
(57°F)		15°C
(60°F)		15°C
(58°F)		11°C
(51°F)		6°C
(43°F)		2°C
(36°F)		-3°C
(27°F)
Mean minimum-13°C
(8°F)		-14°C
(7°F)		-13°C
(8°F)		-5°C
(23°F)		1°C
(33°F)		7°C
(46°F)		11°C
(52°F)		10°C
(51°F)		5°C
(41°F)		-0°C
(32°F)		-4°C
(25°F)		-9°C
(16°F)
Minimum-18°C
(1°F)		-22°C
(-7°F)		-22°C
(-8°F)		-10°C
(15°F)		-1°C
(31°F)		5°C
(41°F)		9°C
(49°F)		9°C
(49°F)		3°C
(39°F)		-2°C
(29°F)		-7°C
(19°F)		-20°C
(-4°F)

Compare climate in Iisaku with other places

Compare temperature, precipitation, sunshine, UV index in Iisaku, Estonia with other places around the world.

Monthly average precipitation in Iisaku, Estonia

Iisaku usually has the most precipitation in July, August and October, with an average of 15 rainy days and 90 mm (3.5 inches) of precipitation per month. The driest months in Iisaku are January, February and March. On average, 49 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Iisaku. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)49 (1.9)49 (1.9)48 (1.9)50 (2.0)62 (2.5)64 (2.5)79 (3.1)90 (3.6)74 (2.9)100 (3.9)76 (3.0)70 (2.7)
Average precipitation days (≥ 1 mm)121312111111141614171516

Monthly sunshine hours in Iisaku, Estonia

The sunniest months in Iisaku are May, June and July, when the sun shines an average of 15 hours 13 minutes a day. Least sunny months in Iisaku: January, November and December receive an average of 2 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Iisaku. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours4912326435244448147440030220510648
Mean daily daylight hours7h 1m9h 15m11h 51m14h 31m16h 58m18h 22m17h 37m15h 22m12h 46m10h 8m7h 40m6h 16m

Solar UV radiation in Iisaku, Estonia

Iisaku experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 6 - 7, which corresponds to the High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 1. For more detailed information, check out our hourly Iisaku UV Index data.

Average daily maximum UV levels by month for Iisaku. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)123457764211