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Monthly climate in Sumy, Ukraine

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Sumy features a humid continental climate (Dfb).Temperatures typically range between -4 °C (25 °F) and 21 °C (69 °F) through the year, but rarely can drop to -27 °C (-16 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 583 mm (23.0 inches) and receives 108 rainy days on the 1 mm (0.04 inches) threshold annually.Sumy enjoys an average of 3251 hours of sunshine throughout the year, and daylight varies from 7 hours 59 minutes to 16 hours 25 minutes per day.

Monthly average temperatures in Sumy, Ukraine §

The warmest months in Sumy are June, July and August, with daily mean temperatures ranging from 20 to 21 °C (68 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -1 °C (25 - 30 °F) throughout the day. On average each year, Sumy experiences 60 days above 25 °C (77.0 °F) and 111 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sumy, Ukraine.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 7°C
(45°F)		 9°C
(48°F)		 18°C
(65°F)		 24°C
(76°F)		 30°C
(86°F)		 35°C
(95°F)		 33°C
(92°F)		 34°C
(93°F)		 33°C
(92°F)		 23°C
(74°F)		 16°C
(61°F)		 11°C
(51°F)
Mean maximum 4°C
(40°F)		 6°C
(43°F)		 13°C
(55°F)		 22°C
(71°F)		 27°C
(81°F)		 31°C
(88°F)		 32°C
(89°F)		 33°C
(91°F)		 30°C
(87°F)		 21°C
(70°F)		 12°C
(54°F)		 7°C
(44°F)
Average high -2°C
(29°F)		 -1°C
(31°F)		 5°C
(42°F)		 13°C
(56°F)		 19°C
(67°F)		 25°C
(78°F)		 26°C
(79°F)		 27°C
(80°F)		 21°C
(70°F)		 14°C
(57°F)		 5°C
(40°F)		 1°C
(33°F)
Daily mean -4°C
(25°F)		 -3°C
(26°F)		 1°C
(35°F)		 9°C
(48°F)		 15°C
(59°F)		 20°C
(68°F)		 21°C
(69°F)		 21°C
(69°F)		 15°C
(60°F)		 9°C
(49°F)		 2°C
(36°F)		 -1°C
(30°F)
Average low -7°C
(20°F)		 -6°C
(21°F)		 -2°C
(28°F)		 3°C
(38°F)		 9°C
(49°F)		 15°C
(59°F)		 15°C
(60°F)		 14°C
(58°F)		 10°C
(50°F)		 5°C
(41°F)		 -0°C
(32°F)		 -3°C
(27°F)
Mean minimum -18°C
(-1°F)		 -17°C
(2°F)		 -11°C
(13°F)		 -3°C
(27°F)		 3°C
(38°F)		 9°C
(48°F)		 10°C
(50°F)		 8°C
(47°F)		 1°C
(34°F)		 -3°C
(27°F)		 -8°C
(18°F)		 -11°C
(13°F)
Minimum -27°C
(-16°F)		 -23°C
(-10°F)		 -19°C
(-2°F)		 -8°C
(18°F)		 0°C
(33°F)		 4°C
(40°F)		 9°C
(48°F)		 6°C
(44°F)		 -1°C
(31°F)		 -6°C
(21°F)		 -11°C
(13°F)		 -21°C
(-5°F)

Compare climate in Sumy with other places

Compare temperature, precipitation, sunshine, UV index in Sumy, Ukraine with other places around the world.

Monthly average precipitation in Sumy, Ukraine §

Sumy usually has the most precipitation in May, July and December, with an average of 11 rainy days and 72 mm (2.8 inches) of precipitation per month.The driest months in Sumy are August, October and November. On average, 34 mm (1.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sumy, Ukraine.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 43 (1.7) 45 (1.8) 40 (1.6) 40 (1.6) 64 (2.5) 58 (2.3) 84 (3.3) 28 (1.1) 39 (1.5) 36 (1.4) 37 (1.4) 69 (2.7)
Average precipitation days (≥ 1 mm) 9 8 10 8 10 11 12 5 8 7 7 13

Monthly sunshine hours in Sumy, Ukraine §

The sunniest months in Sumy are June, July and August, when the sun shines an average of 13 hours 44 minutes a day.Least sunny months in Sumy: January, November and December receive an average of 3 hours 2 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sumy, Ukraine.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 68 146 265 332 398 421 439 403 320 242 136 75
Mean daily daylight hours 8h 28m 10h 0m 11h 54m 13h 51m 15h 33m 16h 25m 15h 58m 14h 27m 12h 34m 10h 38m 8h 55m 7h 59m

Solar UV radiation in Sumy, Ukraine §

Sumy 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 Sumy UV Index data.

Average daily maximum UV levels by month for Sumy, Ukraine.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 2 4 5 7 8 8 7 6 3 2 1