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Monthly climate in Hamina, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Hamina features a humid continental climate (Dfb). Temperatures typically range between -4 °C (25 °F) and 18 °C (65 °F) through the year, but rarely can drop to -28 °C (-18 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 772 mm (30.4 inches) and receives 145 rainy days on the 1 mm (0.04 inches) threshold annually. Hamina enjoys an average of 3288 hours of sunshine throughout the year, and daylight varies from 5 hours 49 minutes to 18 hours 54 minutes per day.

Monthly average temperatures in Hamina, Finland

The warmest months in Hamina are June, July and August, with daily mean temperatures ranging from 16 to 18 °C (61 - 65 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -4 to -1 °C (25 - 30 °F) throughout the day. On average each year, Hamina experiences 10 days above 25 °C (77.0 °F) and 120 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hamina. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum7°C
(46°F)		7°C
(44°F)		9°C
(48°F)		19°C
(67°F)		26°C
(79°F)		30°C
(87°F)		31°C
(88°F)		30°C
(87°F)		22°C
(73°F)		16°C
(62°F)		12°C
(54°F)		6°C
(44°F)
Mean maximum4°C
(39°F)		4°C
(39°F)		7°C
(45°F)		14°C
(57°F)		21°C
(70°F)		24°C
(76°F)		28°C
(82°F)		25°C
(77°F)		20°C
(68°F)		15°C
(58°F)		10°C
(50°F)		5°C
(41°F)
Average high-1°C
(30°F)		-2°C
(29°F)		1°C
(35°F)		7°C
(45°F)		13°C
(56°F)		20°C
(68°F)		21°C
(71°F)		20°C
(68°F)		15°C
(59°F)		9°C
(49°F)		5°C
(40°F)		0°C
(33°F)
Daily mean-3°C
(27°F)		-4°C
(25°F)		-1°C
(30°F)		4°C
(39°F)		10°C
(50°F)		16°C
(61°F)		18°C
(65°F)		17°C
(62°F)		12°C
(54°F)		7°C
(45°F)		3°C
(38°F)		-1°C
(30°F)
Average low-5°C
(23°F)		-7°C
(20°F)		-5°C
(24°F)		-0°C
(32°F)		5°C
(42°F)		12°C
(53°F)		14°C
(57°F)		13°C
(56°F)		9°C
(49°F)		5°C
(41°F)		1°C
(35°F)		-3°C
(27°F)
Mean minimum-18°C
(0°F)		-16°C
(3°F)		-15°C
(5°F)		-7°C
(19°F)		-1°C
(30°F)		6°C
(43°F)		9°C
(49°F)		8°C
(47°F)		3°C
(38°F)		-2°C
(29°F)		-5°C
(23°F)		-9°C
(16°F)
Minimum-24°C
(-10°F)		-28°C
(-18°F)		-22°C
(-7°F)		-12°C
(10°F)		-3°C
(27°F)		2°C
(35°F)		8°C
(46°F)		7°C
(45°F)		-0°C
(32°F)		-4°C
(26°F)		-8°C
(18°F)		-18°C
(-0°F)

Compare climate in Hamina with other places

Compare temperature, precipitation, sunshine, UV index in Hamina, Finland with other places around the world.

Monthly average precipitation in Hamina, Finland

Hamina usually has the most precipitation in July, August and October, with an average of 13 rainy days and 85 mm (3.4 inches) of precipitation per month. The driest months in Hamina are April, May and June. On average, 47 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hamina. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)55 (2.2)56 (2.2)50 (2.0)43 (1.7)49 (1.9)48 (1.9)82 (3.2)90 (3.5)67 (2.6)84 (3.3)65 (2.6)82 (3.2)
Average precipitation days (≥ 1 mm)12111110910111312161416

Monthly sunshine hours in Hamina, Finland

The sunniest months in Hamina are May, June and July, when the sun shines an average of 15 hours 31 minutes a day. Least sunny months in Hamina: January, November and December receive an average of 2 hours 7 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hamina. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours4513225836545048848941029620010643
Mean daily daylight hours6h 39m9h 4m11h 51m14h 41m17h 20m18h 54m18h 3m15h 35m12h 48m10h 0m7h 22m5h 49m

Solar UV radiation in Hamina, Finland

Hamina experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 5 - 7, which corresponds to the Moderate / High category of sun exposure. January, February and November 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 Hamina UV Index data.

Average daily maximum UV levels by month for Hamina. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)113457754211