What is the hottest month in Napoleon?

July is the warmest month in Napoleon, with an average high of 81.6°F.

What is the coldest month in Napoleon?

January is the coldest month in Napoleon, with an average low of 0.5°F.

What month does Napoleon get the most rain?

June is typically the wettest month in Napoleon, with about 3.83 inches of precipitation.

What plant hardiness zone is Napoleon in?

Napoleon is approximately in USDA plant hardiness Zone 5b, based on the average annual extreme minimum temperature.

Napoleon, ND

Climate overview — based on NOAA 1991-2020 normals from NAPOLEON, ND US.

Dfb Warm-summer humid continental climate 5b USDA hardiness Zone 5b

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Napoleon has an annual average temperature of 41.2°F with about 20.7 inches of precipitation per year and 53.2 inches of snow. The warmest month is July (average high 81.6°F), and the coldest is January (average low 0.5°F). June is typically the wettest month (3.83 in) and January the driest (0.55 in). Snow typically falls from October through May.

Pleasant months

1 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

59.4°F

warmest to coldest month

Heating need

8,793

HDD/yr

Cooling need

228

CDD/yr

Best time to visit Napoleon

Full guide →

Climate change signal

All-time records →

16 of 366 (4.4%) of Napoleon's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.

1890s		10
1900s		32
1910s		37
1920s		39
1930s		83
1940s		14
1950s		28
1960s		22
1970s		14
1980s		24
1990s		16
2000s		22
2010s		15
2020s		10

Bars: number of all-time daily heat records still standing that were set in each decade.

Monthly averages

Month	Avg High	Avg Low	Avg Temp	Precipitation	Snow	Rainy days
January	19.8°F	0.5°F	10.2°F	0.55 in	9.6 in	7
February	24.4°F	4.0°F	14.2°F	0.56 in	7.9 in	6
March	36.7°F	16.4°F	26.5°F	0.93 in	9.2 in	6
April	52.9°F	28.8°F	40.8°F	1.69 in	5.7 in	7
May	65.9°F	41.8°F	53.8°F	2.82 in	0.7 in	10
June	75.4°F	52.8°F	64.1°F	3.83 in	—	11
July	81.6°F	57.7°F	69.6°F	3.06 in	—	9
August	80.7°F	55.4°F	68.0°F	2.40 in	—	7
September	71.1°F	46.1°F	58.6°F	1.79 in	—	7
October	55.3°F	32.6°F	43.9°F	1.73 in	2.5 in	7
November	38.4°F	18.6°F	28.5°F	0.66 in	6.6 in	5
December	25.0°F	7.5°F	16.3°F	0.71 in	11.0 in	6