Riverdale weather by month
What a typical year looks like in Riverdale, North Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Garrison, 18 km from Riverdale; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 18.2 in462 mm
- Snow a year
- 43 in108 cm
- Last spring freeze
- May 15
- First fall freeze
- Sep 22
- Heating degree days
- 8,958
- Cooling degree days
- 442
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −24°−31° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Riverdale in January
Highs average 20°−7° and lows 2°−17°, with 0.43 in11 mm of precipitation and 7 in17 cm of snow in a typical January.
- Record high
- 54°12° (2006)
- Record low
- −48°−44° (2009)
- Heating degree days
- 1688
- Cooling degree days
- 0
Riverdale in February
Highs average 24°−4° and lows 5°−15°, with 0.36 in9.1 mm of precipitation and 6 in16 cm of snow in a typical February.
- Record high
- 63°17° (1958)
- Record low
- −37°−38° (1986)
- Heating degree days
- 1408
- Cooling degree days
- 0
Riverdale in March
Highs average 37°3° and lows 17°−8°, with 0.67 in17 mm of precipitation and 7 in19 cm of snow in a typical March.
- Record high
- 78°26° (2012)
- Record low
- −31°−35° (2003)
- Heating degree days
- 1180
- Cooling degree days
- 0
Riverdale in April
Highs average 53°12° and lows 30°−1°, with 1.2 in31 mm of precipitation and 2.9 in7.4 cm of snow in a typical April.
- Record high
- 93°34° (1980)
- Record low
- −12°−24° (1982)
- Heating degree days
- 713
- Cooling degree days
- 0
Riverdale in May
Highs average 66°19° and lows 42°6°, with 2.8 in72 mm of precipitation and 1.3 in3.3 cm of snow in a typical May.
- Record high
- 96°36° (1969)
- Record low
- 12°−11° (1967)
- Heating degree days
- 350
- Cooling degree days
- 12
Riverdale in June
Highs average 75°24° and lows 53°12°, with 3.8 in96 mm of precipitation in a typical June.
- Record high
- 102°39° (2021)
- Record low
- 28°−2° (1982)
- Heating degree days
- 102
- Cooling degree days
- 66
Riverdale in July
Highs average 81°27° and lows 58°15°, with 2.7 in69 mm of precipitation in a typical July.
- Record high
- 105°41° (1977)
- Record low
- 35°2° (1967)
- Heating degree days
- 25
- Cooling degree days
- 174
Riverdale in August
Highs average 81°27° and lows 56°13°, with 2.1 in54 mm of precipitation in a typical August.
- Record high
- 108°42° (1949)
- Record low
- 29°−2° (1982)
- Heating degree days
- 41
- Cooling degree days
- 151
Riverdale in September
Highs average 71°22° and lows 46°8°, with 1.7 in43 mm of precipitation in a typical September.
- Record high
- 104°40° (1978)
- Record low
- 17°−8° (1974)
- Heating degree days
- 221
- Cooling degree days
- 37
Riverdale in OctoberThis month
Highs average 55°13° and lows 33°1°, with 1.3 in33 mm of precipitation and 2.5 in6.4 cm of snow in a typical October.
- Record high
- 95°35° (1953)
- Record low
- −3°−19° (1991)
- Heating degree days
- 651
- Cooling degree days
- 2
Riverdale in November
Highs average 38°3° and lows 20°−7°, with 0.63 in16 mm of precipitation and 6 in14 cm of snow in a typical November.
- Record high
- 75°24° (1999)
- Record low
- −27°−33° (1985)
- Heating degree days
- 1083
- Cooling degree days
- 0
Riverdale in December
Highs average 25°−4° and lows 9°−13°, with 0.45 in11 mm of precipitation and 10 in25 cm of snow in a typical December.
- Record high
- 61°16° (1979)
- Record low
- −42°−41° (1983)
- Heating degree days
- 1496
- Cooling degree days
- 0