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Monthly climate in Chelan, Washington, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Chelan features a humid continental climate (Dsb). Temperatures typically range between -2 °C (28 °F) and 22 °C (72 °F) through the year, but rarely can drop to -19 °C (-1 °F) or can rise to as high as 43 °C (109 °F). The average annual precipitation amounts to about 450 mm (17.7 inches) and receives 80 rainy days on the 1 mm (0.04 inches) threshold annually. Chelan enjoys an average of 3027 hours of sunshine throughout the year, and daylight varies from 8 hours 28 minutes to 15 hours 54 minutes per day.

Monthly average temperatures in Chelan, Washington, United States §

The warmest months in Chelan are June, July and August, with daily mean temperatures ranging from 18 to 22 °C (65 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to -2 °C (28 - 29 °F) throughout the day. On average each year, Chelan experiences 66 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 Chelan, Washington, United States. 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)		 12°C
(55°F)		 18°C
(64°F)		 25°C
(76°F)		 31°C
(87°F)		 43°C
(109°F)		 40°C
(105°F)		 38°C
(100°F)		 35°C
(96°F)		 26°C
(79°F)		 15°C
(60°F)		 14°C
(58°F)
Mean maximum 5°C
(41°F)		 9°C
(48°F)		 15°C
(59°F)		 20°C
(69°F)		 28°C
(83°F)		 32°C
(90°F)		 36°C
(97°F)		 37°C
(98°F)		 31°C
(88°F)		 20°C
(69°F)		 14°C
(58°F)		 8°C
(46°F)
Average high 0°C
(32°F)		 2°C
(36°F)		 8°C
(47°F)		 13°C
(56°F)		 20°C
(68°F)		 24°C
(76°F)		 29°C
(85°F)		 29°C
(84°F)		 22°C
(72°F)		 13°C
(55°F)		 6°C
(43°F)		 1°C
(33°F)
Daily mean -2°C
(28°F)		 -2°C
(29°F)		 3°C
(38°F)		 8°C
(47°F)		 14°C
(58°F)		 18°C
(65°F)		 22°C
(72°F)		 22°C
(71°F)		 16°C
(61°F)		 8°C
(47°F)		 3°C
(37°F)		 -2°C
(29°F)
Average low -5°C
(24°F)		 -5°C
(24°F)		 -1°C
(30°F)		 3°C
(37°F)		 8°C
(46°F)		 11°C
(53°F)		 14°C
(58°F)		 14°C
(58°F)		 10°C
(51°F)		 4°C
(39°F)		 -0°C
(32°F)		 -4°C
(25°F)
Mean minimum -13°C
(10°F)		 -12°C
(10°F)		 -8°C
(18°F)		 -3°C
(28°F)		 2°C
(35°F)		 6°C
(43°F)		 10°C
(49°F)		 9°C
(48°F)		 4°C
(40°F)		 -3°C
(27°F)		 -6°C
(22°F)		 -12°C
(11°F)
Minimum -17°C
(1°F)		 -14°C
(6°F)		 -15°C
(6°F)		 -4°C
(25°F)		 0°C
(32°F)		 4°C
(40°F)		 9°C
(48°F)		 7°C
(45°F)		 2°C
(36°F)		 -7°C
(19°F)		 -9°C
(16°F)		 -19°C
(-1°F)

Compare climate in Chelan with other places

Compare temperature, precipitation, sunshine, UV index in Chelan, Washington, United States with other places around the world.

Monthly average precipitation in Chelan, Washington, United States §

Chelan usually has the most precipitation in January, February and December, with an average of 12 rainy days and 69 mm (2.7 inches) of precipitation per month. The driest months in Chelan are June, July and August. On average, 5 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Chelan, Washington, United States. 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) 62 (2.4) 41 (1.6) 36 (1.4) 22 (0.9) 9 (0.4) 2 (0.1) 4 (0.2) 23 (0.9) 48 (1.9) 57 (2.2) 70 (2.8)
Average precipitation days (≥ 1 mm) 13 11 8 6 5 3 0 1 3 6 12 12

Monthly sunshine hours in Chelan, Washington, United States §

The sunniest months in Chelan are June, July and August, when the sun shines an average of 12 hours 31 minutes a day. Least sunny months in Chelan: January, November and December receive an average of 3 hours 27 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Chelan, Washington, United States. 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 78 161 240 285 350 376 416 360 286 231 139 99
Mean daily daylight hours 8h 54m 10h 15m 11h 57m 13h 40m 15h 9m 15h 54m 15h 29m 14h 9m 12h 29m 10h 46m 9h 15m 8h 28m

Solar UV radiation in Chelan, Washington, United States §

Chelan experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Chelan UV Index data.

Average daily maximum UV levels by month for Chelan, Washington, United States. 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 4 5 6 8 9 10 9 7 5 3 2

Detailed Monthly Weather Insights for Chelan, Washington, United States

Discover in-depth weather details for every month in Chelan. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Chelan's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.