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Monthly climate in Siljan, Vestfold og Telemark, Norway

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Siljan features a humid continental climate (Dfb).Temperatures typically range between -1 °C (30 °F) and 17 °C (63 °F) through the year, but rarely can drop to -16 °C (3 °F) or can rise to as high as 30 °C (87 °F).The average annual precipitation amounts to about 1161 mm (45.7 inches) and receives 141 rainy days on the 1 mm (0.04 inches) threshold annually.Siljan enjoys an average of 3435 hours of sunshine throughout the year, and daylight varies from 6 hours 15 minutes to 18 hours 23 minutes per day.

Monthly average temperatures in Siljan, Vestfold og Telemark, Norway §

The warmest months in Siljan are June, July and August, with daily mean temperatures ranging from 16 to 17 °C (60 - 63 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to -1 °C (30 - 31 °F) throughout the day. On average each year, Siljan experiences 9 days above 25 °C (77.0 °F) and 113 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Siljan, Vestfold og Telemark, Norway.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 10°C
(51°F)		 11°C
(53°F)		 15°C
(60°F)		 21°C
(70°F)		 27°C
(82°F)		 28°C
(83°F)		 30°C
(87°F)		 26°C
(80°F)		 24°C
(76°F)		 18°C
(64°F)		 15°C
(59°F)		 10°C
(50°F)
Mean maximum 7°C
(46°F)		 8°C
(46°F)		 13°C
(55°F)		 17°C
(64°F)		 23°C
(74°F)		 24°C
(76°F)		 27°C
(80°F)		 25°C
(77°F)		 21°C
(70°F)		 15°C
(59°F)		 12°C
(54°F)		 8°C
(46°F)
Average high 1°C
(34°F)		 2°C
(35°F)		 5°C
(42°F)		 10°C
(50°F)		 15°C
(59°F)		 20°C
(68°F)		 21°C
(71°F)		 20°C
(67°F)		 16°C
(61°F)		 10°C
(51°F)		 5°C
(42°F)		 1°C
(35°F)
Daily mean -1°C
(30°F)		 -1°C
(30°F)		 1°C
(35°F)		 5°C
(42°F)		 10°C
(51°F)		 16°C
(60°F)		 17°C
(63°F)		 16°C
(60°F)		 12°C
(54°F)		 7°C
(46°F)		 3°C
(38°F)		 -1°C
(31°F)
Average low -4°C
(25°F)		 -4°C
(25°F)		 -2°C
(28°F)		 1°C
(33°F)		 6°C
(42°F)		 11°C
(52°F)		 12°C
(55°F)		 12°C
(53°F)		 9°C
(49°F)		 5°C
(41°F)		 1°C
(34°F)		 -3°C
(28°F)
Mean minimum -12°C
(11°F)		 -12°C
(11°F)		 -10°C
(14°F)		 -6°C
(22°F)		 -1°C
(30°F)		 7°C
(44°F)		 8°C
(47°F)		 7°C
(44°F)		 4°C
(40°F)		 -2°C
(28°F)		 -6°C
(21°F)		 -9°C
(15°F)
Minimum -14°C
(6°F)		 -16°C
(3°F)		 -16°C
(4°F)		 -11°C
(13°F)		 -4°C
(25°F)		 4°C
(40°F)		 7°C
(44°F)		 5°C
(42°F)		 1°C
(35°F)		 -4°C
(26°F)		 -10°C
(14°F)		 -12°C
(11°F)

Compare climate in Siljan with other places

Compare temperature, precipitation, sunshine, UV index in Siljan, Vestfold og Telemark, Norway with other places around the world.

Monthly average precipitation in Siljan, Vestfold og Telemark, Norway §

Siljan usually has the most precipitation in September, October and December, with an average of 14 rainy days and 131 mm (5.2 inches) of precipitation per month.The driest months in Siljan are January, March and April. On average, 65 mm (2.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Siljan, Vestfold og Telemark, Norway.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) 76 (3.0) 79 (3.1) 79 (3.1) 39 (1.5) 86 (3.4) 94 (3.7) 104 (4.1) 94 (3.7) 126 (5.0) 137 (5.4) 116 (4.6) 130 (5.1)
Average precipitation days (≥ 1 mm) 9 11 9 6 11 12 12 13 13 15 14 16

Monthly sunshine hours in Siljan, Vestfold og Telemark, Norway §

The sunniest months in Siljan are May, June and July, when the sun shines an average of 14 hours 39 minutes a day.Least sunny months in Siljan: January, November and December receive an average of 3 hours 33 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Siljan, Vestfold og Telemark, Norway.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 95 180 287 368 420 456 472 407 283 232 132 98
Mean daily daylight hours 7h 0m 9h 15m 11h 52m 14h 32m 16h 59m 18h 23m 17h 38m 15h 22m 12h 45m 10h 7m 7h 39m 6h 15m

Solar UV radiation in Siljan, Vestfold og Telemark, Norway §

Siljan 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 Siljan UV Index data.

Average daily maximum UV levels by month for Siljan, Vestfold og Telemark, Norway.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 7 7 5 4 2 1 1