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Monthly climate in Kostomloty, Poland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Kostomloty features a humid continental climate (Dfb). Temperatures typically range between -2 °C (30 °F) and 20 °C (68 °F) through the year, but rarely can drop to -24 °C (-11 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 735 mm (28.9 inches) and receives 131 rainy days on the 1 mm (0.04 inches) threshold annually. Kostomloty enjoys an average of 3250 hours of sunshine throughout the year, and daylight varies from 7 hours 50 minutes to 16 hours 36 minutes per day.

Monthly average temperatures in Kostomloty, Poland

The warmest months in Kostomloty are June, July and August, with daily mean temperatures ranging from 19 to 20 °C (67 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 1 °C (30 - 34 °F) throughout the day. On average each year, Kostomloty experiences 48 days above 25 °C (77.0 °F) and 88 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Kostomloty. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum10°C
(50°F)		16°C
(61°F)		18°C
(65°F)		27°C
(81°F)		30°C
(86°F)		34°C
(94°F)		36°C
(97°F)		34°C
(94°F)		29°C
(84°F)		23°C
(74°F)		18°C
(65°F)		12°C
(54°F)
Mean maximum7°C
(45°F)		11°C
(52°F)		16°C
(61°F)		23°C
(74°F)		27°C
(80°F)		30°C
(86°F)		32°C
(89°F)		32°C
(89°F)		27°C
(81°F)		21°C
(70°F)		15°C
(60°F)		9°C
(49°F)
Average high1°C
(33°F)		2°C
(36°F)		7°C
(45°F)		13°C
(57°F)		19°C
(66°F)		25°C
(77°F)		25°C
(77°F)		25°C
(78°F)		20°C
(67°F)		14°C
(57°F)		7°C
(45°F)		3°C
(37°F)
Daily mean-2°C
(30°F)		-0°C
(32°F)		3°C
(38°F)		8°C
(47°F)		14°C
(57°F)		20°C
(67°F)		20°C
(68°F)		19°C
(67°F)		15°C
(58°F)		10°C
(50°F)		5°C
(41°F)		1°C
(34°F)
Average low-4°C
(26°F)		-3°C
(27°F)		-1°C
(30°F)		3°C
(38°F)		8°C
(47°F)		14°C
(57°F)		15°C
(59°F)		14°C
(57°F)		10°C
(50°F)		6°C
(44°F)		3°C
(37°F)		-1°C
(30°F)
Mean minimum-14°C
(7°F)		-11°C
(13°F)		-9°C
(17°F)		-3°C
(26°F)		1°C
(34°F)		7°C
(44°F)		10°C
(50°F)		8°C
(47°F)		3°C
(38°F)		0°C
(32°F)		-4°C
(26°F)		-7°C
(20°F)
Minimum-24°C
(-11°F)		-16°C
(3°F)		-18°C
(-1°F)		-6°C
(21°F)		-1°C
(30°F)		4°C
(39°F)		7°C
(45°F)		7°C
(45°F)		1°C
(35°F)		-2°C
(28°F)		-7°C
(19°F)		-13°C
(9°F)

Compare climate in Kostomloty with other places

Compare temperature, precipitation, sunshine, UV index in Kostomloty, Poland with other places around the world.

Monthly average precipitation in Kostomloty, Poland

Kostomloty usually has the most precipitation in May, July and August, with an average of 12 rainy days and 87 mm (3.4 inches) of precipitation per month. The driest months in Kostomloty are January, March and November. On average, 39 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Kostomloty. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)42 (1.7)43 (1.7)40 (1.6)47 (1.8)88 (3.5)82 (3.2)85 (3.4)88 (3.5)68 (2.7)63 (2.5)36 (1.4)52 (2.1)
Average precipitation days (≥ 1 mm)10101110131014111111812

Monthly sunshine hours in Kostomloty, Poland

The sunniest months in Kostomloty are May, June and July, when the sun shines an average of 13 hours 23 minutes a day. Least sunny months in Kostomloty: January, November and December receive an average of 3 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Kostomloty. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours9916625733139241542438529022815998
Mean daily daylight hours8h 20m9h 56m11h 54m13h 55m15h 41m16h 36m16h 7m14h 32m12h 35m10h 35m8h 48m7h 50m

Solar UV radiation in Kostomloty, Poland

Kostomloty experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 7 - 8, which corresponds to the High / Very High category of sun exposure. January, February and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Kostomloty UV Index data.

Average daily maximum UV levels by month for Kostomloty. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)124678876321