Mankato weather by month
What a typical year looks like in Mankato, Minnesota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at ST. PETER, 17 km from Mankato; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 32.4 in823 mm
- Snow a year
- 38 in96 cm
- Last spring freeze
- May 2
- First fall freeze
- Oct 3
- Heating degree days
- 8,212
- Cooling degree days
- 578
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −16°−27° (heating, 99%) and 93°34° (cooling, 1%).
Month by month
Mankato in January
Highs average 22°−6° and lows 3°−16°, with 0.96 in24 mm of precipitation and 9 in22 cm of snow in a typical January.
- Record high
- 65°18° (1944)
- Record low
- −40° (1912)
- Heating degree days
- 1627
- Cooling degree days
- 0
Mankato in February
Highs average 27°−3° and lows 7°−14°, with 0.96 in24 mm of precipitation and 8 in21 cm of snow in a typical February.
- Record high
- 68°20° (1896)
- Record low
- −36°−38° (1895)
- Heating degree days
- 1350
- Cooling degree days
- 0
Mankato in March
Highs average 40°4° and lows 21°−6°, with 1.8 in45 mm of precipitation and 4 in11 cm of snow in a typical March.
- Record high
- 92°33° (1913)
- Record low
- −30°−34° (1948)
- Heating degree days
- 1077
- Cooling degree days
- 0
Mankato in April
Highs average 55°13° and lows 33°0°, with 3.1 in78 mm of precipitation and 2.7 in6.9 cm of snow in a typical April.
- Record high
- 94°34° (1980)
- Record low
- −5°−21° (1924)
- Heating degree days
- 636
- Cooling degree days
- 2
Mankato in May
Highs average 68°20° and lows 46°8°, with 4 in103 mm of precipitation in a typical May.
- Record high
- 107°42° (1934)
- Record low
- 14°−10° (1989)
- Heating degree days
- 278
- Cooling degree days
- 32
Mankato in June
Highs average 78°25° and lows 57°14°, with 5.1 in130 mm of precipitation in a typical June.
- Record high
- 104°40° (1934)
- Record low
- 32°0° (1945)
- Heating degree days
- 53
- Cooling degree days
- 125
Mankato in July
Highs average 82°28° and lows 61°16°, with 4.4 in112 mm of precipitation in a typical July.
- Record high
- 109°43° (1936)
- Record low
- 34°1° (1910)
- Heating degree days
- 10
- Cooling degree days
- 213
Mankato in August
Highs average 79°26° and lows 59°15°, with 3.6 in90 mm of precipitation in a typical August.
- Record high
- 104°40° (1936)
- Record low
- 34°1° (1931)
- Heating degree days
- 27
- Cooling degree days
- 154
Mankato in September
Highs average 72°22° and lows 49°9°, with 3.2 in80 mm of precipitation in a typical September.
- Record high
- 103°39° (1922)
- Record low
- 21°−6° (1939)
- Heating degree days
- 184
- Cooling degree days
- 48
Mankato in OctoberThis month
Highs average 58°15° and lows 35°2°, with 2.5 in64 mm of precipitation and 0.2 in0.5 cm of snow in a typical October.
- Record high
- 92°33° (1928)
- Record low
- 4°−16° (1925)
- Heating degree days
- 568
- Cooling degree days
- 4
Mankato in November
Highs average 42°5° and lows 23°−5°, with 1.7 in43 mm of precipitation and 3 in8 cm of snow in a typical November.
- Record high
- 81°27° (2006)
- Record low
- −22°−30° (1896)
- Heating degree days
- 982
- Cooling degree days
- 0
Mankato in December
Highs average 28°−2° and lows 11°−12°, with 1.2 in30 mm of precipitation and 11 in27 cm of snow in a typical December.
- Record high
- 69°21° (1998)
- Record low
- −32°−36° (1983)
- Heating degree days
- 1420
- Cooling degree days
- 0