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Monthly climate in Napoleon, North Dakota, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Napoleon features a humid continental climate (Dfb). Temperatures typically range between -12 °C (11 °F) and 22 °C (73 °F) through the year, but rarely can drop to -37 °C (-34 °F) or can rise to as high as 38 °C (100 °F). The average annual precipitation amounts to about 578 mm (22.7 inches) and receives 78 rainy days on the 1 mm (0.04 inches) threshold annually. Napoleon enjoys an average of 3100 hours of sunshine throughout the year, and daylight varies from 8 hours 37 minutes to 15 hours 44 minutes per day.

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

The warmest months in Napoleon are June, July and August, with daily mean temperatures ranging from 20 to 22 °C (68 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -12 to -6 °C (11 - 21 °F) throughout the day. On average each year, Napoleon experiences 63 days above 25 °C (77.0 °F) and 164 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Napoleon, 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 7°C
(45°F)		 10°C
(50°F)		 19°C
(67°F)		 24°C
(75°F)		 31°C
(88°F)		 38°C
(100°F)		 36°C
(98°F)		 37°C
(99°F)		 33°C
(92°F)		 28°C
(83°F)		 23°C
(73°F)		 14°C
(57°F)
Mean maximum 5°C
(40°F)		 6°C
(44°F)		 13°C
(56°F)		 21°C
(71°F)		 28°C
(83°F)		 31°C
(88°F)		 34°C
(93°F)		 33°C
(92°F)		 31°C
(87°F)		 24°C
(75°F)		 15°C
(59°F)		 9°C
(48°F)
Average high -6°C
(21°F)		 -7°C
(20°F)		 3°C
(37°F)		 9°C
(49°F)		 18°C
(65°F)		 26°C
(79°F)		 28°C
(83°F)		 26°C
(80°F)		 21°C
(71°F)		 11°C
(52°F)		 4°C
(39°F)		 -2°C
(28°F)
Daily mean -10°C
(14°F)		 -12°C
(11°F)		 -2°C
(29°F)		 4°C
(39°F)		 12°C
(55°F)		 20°C
(68°F)		 22°C
(73°F)		 20°C
(69°F)		 15°C
(60°F)		 6°C
(43°F)		 -1°C
(30°F)		 -6°C
(21°F)
Average low -15°C
(6°F)		 -17°C
(2°F)		 -7°C
(20°F)		 -2°C
(29°F)		 6°C
(44°F)		 14°C
(57°F)		 17°C
(62°F)		 14°C
(58°F)		 10°C
(50°F)		 1°C
(35°F)		 -6°C
(22°F)		 -10°C
(13°F)
Mean minimum -29°C
(-21°F)		 -29°C
(-20°F)		 -20°C
(-4°F)		 -12°C
(11°F)		 -2°C
(29°F)		 7°C
(45°F)		 11°C
(52°F)		 8°C
(47°F)		 2°C
(35°F)		 -9°C
(16°F)		 -15°C
(6°F)		 -26°C
(-15°F)
Minimum -37°C
(-34°F)		 -33°C
(-27°F)		 -28°C
(-18°F)		 -19°C
(-2°F)		 -4°C
(25°F)		 5°C
(41°F)		 9°C
(49°F)		 7°C
(45°F)		 -1°C
(31°F)		 -13°C
(8°F)		 -17°C
(2°F)		 -31°C
(-24°F)

Compare climate in Napoleon with other places

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

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

Napoleon usually has the most precipitation in June, July and August, with an average of 8 rainy days and 84 mm (3.3 inches) of precipitation per month. The driest months in Napoleon are January, February and November. On average, 16 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Napoleon, 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) 15 (0.6) 17 (0.7) 26 (1.0) 35 (1.4) 61 (2.4) 85 (3.3) 73 (2.9) 94 (3.7) 61 (2.4) 66 (2.6) 17 (0.7) 29 (1.1)
Average precipitation days (≥ 1 mm) 4 5 4 8 9 8 8 9 7 7 4 5

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

The sunniest months in Napoleon are June, July and August, when the sun shines an average of 11 hours 45 minutes a day. Least sunny months in Napoleon: January, November and December receive an average of 5 hours 33 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Napoleon, 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 144 205 247 258 314 366 379 335 266 214 190 176
Mean daily daylight hours 9h 2m 10h 20m 11h 57m 13h 36m 15h 1m 15h 44m 15h 21m 14h 4m 12h 29m 10h 50m 9h 22m 8h 37m

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

Napoleon 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 Napoleon UV Index data.

Average daily maximum UV levels by month for Napoleon, 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) 3 5 5 9 9 10 9 9 7 5 3 2

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

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