Mercer weather by month
What a typical year looks like in Mercer, North Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Turtle Lake, 14 km from Mercer; records cover 1913–2026.
The year at a glance
- Precipitation a year
- 18.2 in463 mm
- Snow a year
- 44 in112 cm
- Last spring freeze
- May 15
- First fall freeze
- Sep 23
- Heating degree days
- 9,093
- Cooling degree days
- 412
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −23°−31° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Mercer in January
Highs average 20°−7° and lows 1°−17°, with 0.55 in14 mm of precipitation and 11 in27 cm of snow in a typical January.
- Record high
- 57°14° (2012)
- Record low
- −47°−44° (1916)
- Heating degree days
- 1688
- Cooling degree days
- 0
Mercer in February
Highs average 25°−4° and lows 4°−15°, with 0.42 in11 mm of precipitation and 7 in17 cm of snow in a typical February.
- Record high
- 65°18° (1958)
- Record low
- −50°−46° (1936)
- Heating degree days
- 1417
- Cooling degree days
- 0
Mercer in March
Highs average 37°3° and lows 16°−9°, with 0.84 in21 mm of precipitation and 6 in14 cm of snow in a typical March.
- Record high
- 80°27° (1946)
- Record low
- −34°−37° (1948)
- Heating degree days
- 1190
- Cooling degree days
- 0
Mercer in April
Highs average 54°12° and lows 28°−2°, with 1.3 in34 mm of precipitation and 2.3 in5.8 cm of snow in a typical April.
- Record high
- 95°35° (1980)
- Record low
- −8°−22° (1975)
- Heating degree days
- 729
- Cooling degree days
- 0
Mercer in May
Highs average 67°19° and lows 40°5°, with 2.6 in65 mm of precipitation and 0.6 in1.5 cm of snow in a typical May.
- Record high
- 98°37° (1925)
- Record low
- 11°−12° (1967)
- Heating degree days
- 365
- Cooling degree days
- 11
Mercer in June
Highs average 76°25° and lows 51°11°, with 3.5 in88 mm of precipitation in a typical June.
- Record high
- 108°42° (1936)
- Record low
- 29°−2° (1915)
- Heating degree days
- 104
- Cooling degree days
- 64
Mercer in July
Highs average 83°28° and lows 56°14°, with 2.6 in66 mm of precipitation in a typical July.
- Record high
- 115°46° (1936)
- Record low
- 34°1° (1927)
- Heating degree days
- 27
- Cooling degree days
- 168
Mercer in August
Highs average 82°28° and lows 54°12°, with 2.2 in56 mm of precipitation in a typical August.
- Record high
- 109°43° (1941)
- Record low
- 31°−1° (1982)
- Heating degree days
- 44
- Cooling degree days
- 137
Mercer in September
Highs average 72°22° and lows 44°7°, with 1.8 in45 mm of precipitation in a typical September.
- Record high
- 106°41° (1978)
- Record low
- 13°−11° (1942)
- Heating degree days
- 240
- Cooling degree days
- 31
Mercer in OctoberThis month
Highs average 55°13° and lows 32°0°, with 1.3 in33 mm of precipitation and 1.7 in4.3 cm of snow in a typical October.
- Record high
- 95°35° (1963)
- Record low
- −12°−24° (1919)
- Heating degree days
- 668
- Cooling degree days
- 1
Mercer in November
Highs average 38°3° and lows 19°−7°, with 0.61 in15 mm of precipitation and 9 in23 cm of snow in a typical November.
- Record high
- 78°26° (1999)
- Record low
- −27°−33° (1914)
- Heating degree days
- 1101
- Cooling degree days
- 0
Mercer in December
Highs average 25°−4° and lows 7°−14°, with 0.63 in16 mm of precipitation and 8 in20 cm of snow in a typical December.
- Record high
- 67°19° (1939)
- Record low
- −41° (1916)
- Heating degree days
- 1520
- Cooling degree days
- 0