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Monthly climate in Casselton, North Dakota, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Casselton features a humid continental climate (Dfb). Temperatures typically range between -12 °C (11 °F) and 23 °C (73 °F) through the year, but rarely can drop to -37 °C (-34 °F) or can rise to as high as 39 °C (103 °F). The average annual precipitation amounts to about 633 mm (24.9 inches) and receives 82 rainy days on the 1 mm (0.04 inches) threshold annually. Casselton enjoys an average of 3032 hours of sunshine throughout the year, and daylight varies from 8 hours 34 minutes to 15 hours 48 minutes per day.

Monthly average temperatures in Casselton, North Dakota, United States §

The warmest months in Casselton are June, July and August, with daily mean temperatures ranging from 20 to 23 °C (69 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -12 to -7 °C (11 - 19 °F) throughout the day. On average each year, Casselton experiences 65 days above 25 °C (77.0 °F) and 160 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Casselton, North Dakota, 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 5°C
(42°F)		 13°C
(56°F)		 23°C
(74°F)		 24°C
(75°F)		 34°C
(94°F)		 39°C
(103°F)		 35°C
(95°F)		 35°C
(95°F)		 33°C
(91°F)		 28°C
(83°F)		 24°C
(75°F)		 11°C
(53°F)
Mean maximum 4°C
(39°F)		 5°C
(42°F)		 14°C
(57°F)		 22°C
(72°F)		 30°C
(87°F)		 32°C
(90°F)		 33°C
(92°F)		 32°C
(90°F)		 31°C
(88°F)		 24°C
(75°F)		 13°C
(56°F)		 8°C
(46°F)
Average high -7°C
(19°F)		 -7°C
(20°F)		 3°C
(37°F)		 10°C
(50°F)		 20°C
(68°F)		 27°C
(80°F)		 28°C
(83°F)		 26°C
(79°F)		 21°C
(71°F)		 12°C
(53°F)		 3°C
(37°F)		 -3°C
(26°F)
Daily mean -12°C
(12°F)		 -12°C
(11°F)		 -2°C
(28°F)		 4°C
(40°F)		 14°C
(57°F)		 21°C
(70°F)		 23°C
(73°F)		 20°C
(69°F)		 16°C
(61°F)		 7°C
(45°F)		 -2°C
(29°F)		 -7°C
(19°F)
Average low -16°C
(4°F)		 -17°C
(2°F)		 -7°C
(20°F)		 -1°C
(31°F)		 8°C
(46°F)		 15°C
(59°F)		 17°C
(63°F)		 15°C
(59°F)		 11°C
(51°F)		 2°C
(36°F)		 -6°C
(22°F)		 -12°C
(11°F)
Mean minimum -31°C
(-24°F)		 -30°C
(-22°F)		 -20°C
(-4°F)		 -10°C
(14°F)		 -0°C
(31°F)		 8°C
(48°F)		 11°C
(53°F)		 9°C
(48°F)		 2°C
(36°F)		 -8°C
(18°F)		 -16°C
(4°F)		 -27°C
(-17°F)
Minimum -37°C
(-34°F)		 -35°C
(-31°F)		 -27°C
(-15°F)		 -16°C
(4°F)		 -4°C
(25°F)		 6°C
(44°F)		 9°C
(49°F)		 8°C
(46°F)		 -2°C
(29°F)		 -12°C
(11°F)		 -18°C
(-0°F)		 -31°C
(-24°F)

Compare climate in Casselton with other places

Compare temperature, precipitation, sunshine, UV index in Casselton, North Dakota, United States with other places around the world.

Monthly average precipitation in Casselton, North Dakota, United States §

Casselton usually has the most precipitation in June, August and October, with an average of 8 rainy days and 89 mm (3.5 inches) of precipitation per month. The driest months in Casselton are January, February and November. On average, 18 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Casselton, North Dakota, 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) 17 (0.7) 20 (0.8) 26 (1.0) 47 (1.9) 57 (2.2) 98 (3.9) 74 (2.9) 87 (3.4) 68 (2.7) 82 (3.2) 17 (0.7) 39 (1.5)
Average precipitation days (≥ 1 mm) 3 5 5 7 9 9 8 9 7 8 5 7

Monthly sunshine hours in Casselton, North Dakota, United States §

The sunniest months in Casselton are June, July and August, when the sun shines an average of 11 hours 28 minutes a day. Least sunny months in Casselton: January, November and December receive an average of 5 hours 17 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Casselton, North Dakota, 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 144 208 247 256 309 358 372 324 260 207 177 164
Mean daily daylight hours 8h 59m 10h 18m 11h 57m 13h 38m 15h 4m 15h 48m 15h 23m 14h 6m 12h 29m 10h 49m 9h 20m 8h 34m

Solar UV radiation in Casselton, North Dakota, United States §

Casselton experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 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 Casselton UV Index data.

Average daily maximum UV levels by month for Casselton, North Dakota, 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 7 8 10 9 8 7 5 3 2

Detailed Monthly Weather Insights for Casselton, North Dakota, United States

Discover in-depth weather details for every month in Casselton. 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 Casselton'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.