Napoleon weather by month
What a typical year looks like in Napoleon, North Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Napoleon, 1 km from Napoleon; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 20.7 in527 mm
- Snow a year
- 53 in135 cm
- Last spring freeze
- May 14
- First fall freeze
- Sep 28
- Heating degree days
- 9,063
- Cooling degree days
- 440
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −22°−30° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Napoleon in January
Highs average 20°−7° and lows 1°−17°, with 0.55 in14 mm of precipitation and 10 in24 cm of snow in a typical January.
- Record high
- 57°14° (1981)
- Record low
- −46°−43° (1916)
- Heating degree days
- 1700
- Cooling degree days
- 0
Napoleon in February
Highs average 24°−4° and lows 4°−16°, with 0.56 in14 mm of precipitation and 8 in20 cm of snow in a typical February.
- Record high
- 63°17° (2016)
- Record low
- −47°−44° (1936)
- Heating degree days
- 1422
- Cooling degree days
- 0
Napoleon in March
Highs average 37°3° and lows 16°−9°, with 0.93 in24 mm of precipitation and 9 in23 cm of snow in a typical March.
- Record high
- 87°31° (1910)
- Record low
- −34°−37° (1948)
- Heating degree days
- 1192
- Cooling degree days
- 0
Napoleon in April
Highs average 53°12° and lows 29°−2°, with 1.7 in43 mm of precipitation and 6 in14 cm of snow in a typical April.
- Record high
- 94°34° (1980)
- Record low
- −11°−24° (1975)
- Heating degree days
- 725
- Cooling degree days
- 0
Napoleon in May
Highs average 66°19° and lows 42°5°, with 2.8 in72 mm of precipitation and 0.7 in1.8 cm of snow in a typical May.
- Record high
- 107°42° (1934)
- Record low
- 8°−13° (1907)
- Heating degree days
- 360
- Cooling degree days
- 14
Napoleon in June
Highs average 75°24° and lows 53°12°, with 3.8 in97 mm of precipitation in a typical June.
- Record high
- 108°42° (1933)
- Record low
- 25°−4° (1897)
- Heating degree days
- 99
- Cooling degree days
- 72
Napoleon in July
Highs average 82°28° and lows 58°14°, with 3.1 in78 mm of precipitation in a typical July.
- Record high
- 118°48° (1936)
- Record low
- 25°−4° (1893)
- Heating degree days
- 27
- Cooling degree days
- 172
Napoleon in August
Highs average 81°27° and lows 55°13°, with 2.4 in61 mm of precipitation in a typical August.
- Record high
- 111°44° (1902)
- Record low
- 25°−4° (1908)
- Heating degree days
- 46
- Cooling degree days
- 140
Napoleon in September
Highs average 71°22° and lows 46°8°, with 1.8 in45 mm of precipitation in a typical September.
- Record high
- 107°42° (1897)
- Record low
- 10°−12° (1907)
- Heating degree days
- 232
- Cooling degree days
- 40
Napoleon in OctoberThis month
Highs average 55°13° and lows 33°0°, with 1.7 in44 mm of precipitation and 2.5 in6.4 cm of snow in a typical October.
- Record high
- 95°35° (1910)
- Record low
- −8°−22° (1919)
- Heating degree days
- 654
- Cooling degree days
- 2
Napoleon in November
Highs average 38°4° and lows 19°−7°, with 0.66 in17 mm of precipitation and 7 in17 cm of snow in a typical November.
- Record high
- 76°24° (2016)
- Record low
- −27°−33° (1964)
- Heating degree days
- 1095
- Cooling degree days
- 0
Napoleon in December
Highs average 25°−4° and lows 8°−14°, with 0.71 in18 mm of precipitation and 11 in28 cm of snow in a typical December.
- Record high
- 70°21° (1894)
- Record low
- −48°−44° (1916)
- Heating degree days
- 1511
- Cooling degree days
- 0