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Monthly climate in Lahti, Finland

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Lahti features a humid continental climate (Dfb).Temperatures typically range between -5 °C (24 °F) and 17 °C (64 °F) through the year, but rarely can drop to -28 °C (-17 °F) or can rise to as high as 31 °C (87 °F).The average annual precipitation amounts to about 726 mm (28.6 inches) and receives 143 rainy days on the 1 mm (0.04 inches) threshold annually.Lahti enjoys an average of 3058 hours of sunshine throughout the year, and daylight varies from 5 hours 40 minutes to 19 hours 4 minutes per day.

Monthly average temperatures in Lahti, Finland §

The warmest months in Lahti are June, July and August, with daily mean temperatures ranging from 16 to 17 °C (61 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to -2 °C (24 - 28 °F) throughout the day. On average each year, Lahti experiences 11 days above 25 °C (77.0 °F) and 136 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Lahti, Finland.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
(46°F)		 7°C
(46°F)		 11°C
(52°F)		 20°C
(69°F)		 28°C
(83°F)		 31°C
(87°F)		 30°C
(87°F)		 31°C
(87°F)		 23°C
(73°F)		 18°C
(64°F)		 12°C
(53°F)		 5°C
(42°F)
Mean maximum 4°C
(39°F)		 4°C
(40°F)		 9°C
(48°F)		 15°C
(60°F)		 24°C
(76°F)		 25°C
(78°F)		 27°C
(82°F)		 26°C
(79°F)		 20°C
(69°F)		 15°C
(59°F)		 9°C
(49°F)		 4°C
(40°F)
Average high -2°C
(29°F)		 -2°C
(28°F)		 2°C
(36°F)		 7°C
(45°F)		 14°C
(58°F)		 20°C
(69°F)		 21°C
(70°F)		 20°C
(68°F)		 14°C
(58°F)		 8°C
(47°F)		 4°C
(39°F)		 -1°C
(31°F)
Daily mean -4°C
(25°F)		 -5°C
(24°F)		 -2°C
(29°F)		 3°C
(38°F)		 10°C
(50°F)		 16°C
(61°F)		 17°C
(64°F)		 16°C
(61°F)		 11°C
(52°F)		 6°C
(43°F)		 2°C
(36°F)		 -2°C
(28°F)
Average low -6°C
(21°F)		 -7°C
(19°F)		 -5°C
(23°F)		 -1°C
(31°F)		 5°C
(41°F)		 11°C
(52°F)		 13°C
(56°F)		 12°C
(54°F)		 8°C
(46°F)		 4°C
(39°F)		 0°C
(33°F)		 -4°C
(25°F)
Mean minimum -20°C
(-4°F)		 -18°C
(-1°F)		 -17°C
(2°F)		 -7°C
(19°F)		 -2°C
(29°F)		 6°C
(42°F)		 8°C
(47°F)		 7°C
(45°F)		 1°C
(35°F)		 -3°C
(27°F)		 -8°C
(18°F)		 -11°C
(13°F)
Minimum -25°C
(-13°F)		 -28°C
(-17°F)		 -25°C
(-13°F)		 -11°C
(12°F)		 -3°C
(27°F)		 2°C
(35°F)		 7°C
(45°F)		 6°C
(43°F)		 -1°C
(30°F)		 -5°C
(23°F)		 -10°C
(14°F)		 -20°C
(-4°F)

Compare climate in Lahti with other places

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

Monthly average precipitation in Lahti, Finland §

Lahti usually has the most precipitation in July, August and October, with an average of 13 rainy days and 78 mm (3.1 inches) of precipitation per month.The driest months in Lahti are February, March and April. On average, 46 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Lahti, Finland.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) 49 (1.9) 45 (1.8) 45 (1.8) 48 (1.9) 54 (2.1) 63 (2.5) 77 (3.0) 80 (3.2) 62 (2.5) 78 (3.1) 54 (2.1) 71 (2.8)
Average precipitation days (≥ 1 mm) 11 11 11 11 10 11 12 13 11 15 11 16

Monthly sunshine hours in Lahti, Finland §

The sunniest months in Lahti are May, June and July, when the sun shines an average of 14 hours 53 minutes a day.Least sunny months in Lahti: January, November and December receive an average of 1 hours 48 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Lahti, Finland.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 43 136 241 348 428 474 466 385 256 154 83 38
Mean daily daylight hours 6h 32m 9h 1m 11h 51m 14h 44m 17h 27m 19h 4m 18h 11m 15h 39m 12h 49m 9h 58m 7h 16m 5h 40m

Solar UV radiation in Lahti, Finland §

Lahti 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 Lahti UV Index data.

Average daily maximum UV levels by month for Lahti, Finland.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) 1 1 3 4 5 6 7 5 3 2 1 1