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Monthly climate in Glen Ullin, North Dakota, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Glen Ullin features a humid continental climate (Dfb). Temperatures typically range between -10 °C (14 °F) and 23 °C (73 °F) through the year, but rarely can drop to -36 °C (-32 °F) or can rise to as high as 40 °C (104 °F). The average annual precipitation amounts to about 469 mm (18.5 inches) and receives 76 rainy days on the 1 mm (0.04 inches) threshold annually. Glen Ullin enjoys an average of 3143 hours of sunshine throughout the year, and daylight varies from 8 hours 35 minutes to 15 hours 47 minutes per day.

Monthly average temperatures in Glen Ullin, North Dakota, United States §

The warmest months in Glen Ullin are June, July and August, with daily mean temperatures ranging from 20 to 23 °C (68 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -10 to -5 °C (14 - 23 °F) throughout the day. On average each year, Glen Ullin experiences 71 days above 25 °C (77.0 °F) and 161 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Glen Ullin, 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 10°C
(50°F)		 14°C
(58°F)		 19°C
(66°F)		 26°C
(78°F)		 31°C
(89°F)		 36°C
(97°F)		 40°C
(104°F)		 38°C
(101°F)		 35°C
(96°F)		 32°C
(90°F)		 24°C
(75°F)		 17°C
(63°F)
Mean maximum 8°C
(47°F)		 10°C
(50°F)		 15°C
(60°F)		 23°C
(73°F)		 29°C
(84°F)		 31°C
(88°F)		 35°C
(96°F)		 36°C
(97°F)		 32°C
(90°F)		 26°C
(79°F)		 17°C
(64°F)		 12°C
(54°F)
Average high -4°C
(26°F)		 -5°C
(24°F)		 5°C
(41°F)		 10°C
(51°F)		 19°C
(66°F)		 26°C
(80°F)		 29°C
(85°F)		 27°C
(82°F)		 22°C
(72°F)		 12°C
(54°F)		 5°C
(41°F)		 -0°C
(31°F)
Daily mean -8°C
(17°F)		 -10°C
(14°F)		 -1°C
(31°F)		 4°C
(40°F)		 13°C
(55°F)		 20°C
(68°F)		 23°C
(73°F)		 21°C
(70°F)		 16°C
(60°F)		 6°C
(43°F)		 -1°C
(31°F)		 -5°C
(23°F)
Average low -13°C
(10°F)		 -15°C
(6°F)		 -6°C
(22°F)		 -1°C
(30°F)		 6°C
(44°F)		 14°C
(57°F)		 16°C
(62°F)		 14°C
(57°F)		 9°C
(49°F)		 1°C
(34°F)		 -5°C
(23°F)		 -9°C
(15°F)
Mean minimum -27°C
(-16°F)		 -28°C
(-18°F)		 -19°C
(-3°F)		 -12°C
(12°F)		 -1°C
(31°F)		 7°C
(44°F)		 12°C
(53°F)		 7°C
(46°F)		 2°C
(35°F)		 -9°C
(16°F)		 -15°C
(5°F)		 -24°C
(-10°F)
Minimum -32°C
(-26°F)		 -36°C
(-32°F)		 -28°C
(-18°F)		 -18°C
(0°F)		 -3°C
(26°F)		 4°C
(40°F)		 9°C
(49°F)		 6°C
(44°F)		 -1°C
(30°F)		 -16°C
(4°F)		 -18°C
(0°F)		 -29°C
(-20°F)

Compare climate in Glen Ullin with other places

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

Monthly average precipitation in Glen Ullin, North Dakota, United States §

Glen Ullin usually has the most precipitation in May, July and August, with an average of 8 rainy days and 65 mm (2.6 inches) of precipitation per month. The driest months in Glen Ullin are January, February and November. On average, 15 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Glen Ullin, 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) 12 (0.5) 16 (0.6) 25 (1.0) 28 (1.1) 61 (2.4) 54 (2.1) 61 (2.4) 72 (2.8) 51 (2.0) 51 (2.0) 17 (0.7) 20 (0.8)
Average precipitation days (≥ 1 mm) 3 5 5 7 9 9 9 8 6 7 4 4

Monthly sunshine hours in Glen Ullin, North Dakota, United States §

The sunniest months in Glen Ullin are June, July and August, when the sun shines an average of 11 hours 53 minutes a day. Least sunny months in Glen Ullin: January, November and December receive an average of 5 hours 44 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Glen Ullin, 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 152 209 242 260 318 375 380 338 272 217 194 182
Mean daily daylight hours 9h 0m 10h 19m 11h 57m 13h 37m 15h 3m 15h 47m 15h 23m 14h 6m 12h 29m 10h 49m 9h 20m 8h 35m

Solar UV radiation in Glen Ullin, North Dakota, United States §

Glen Ullin experiences the highest level of ultraviolet (UV) radiation in April, June 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 Glen Ullin UV Index data.

Average daily maximum UV levels by month for Glen Ullin, 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 9 8 10 9 9 7 5 3 2

Detailed Monthly Weather Insights for Glen Ullin, North Dakota, United States

Discover in-depth weather details for every month in Glen Ullin. 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 Glen Ullin'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.