Winona weather by month
What a typical year looks like in Winona, Missouri: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Winona 3 SW, 6 km from Winona; records cover 2010–2026.
The year at a glance
- Precipitation a year
- 50.5 in1284 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 17
- Heating degree days
- 5,028
- Cooling degree days
- 1,034
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 6°−14° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Winona in January
Highs average 43°6° and lows 20°−7°, with 3.1 in77 mm of precipitation in a typical January.
- Record high
- 74°23° (2026)
- Record low
- −14°−26° (2026)
- Heating degree days
- 1043
- Cooling degree days
- 0
Winona in February
Highs average 48°9° and lows 24°−5°, with 3.1 in78 mm of precipitation in a typical February.
- Record high
- 87°31° (2024)
- Record low
- −9°−23° (2015)
- Heating degree days
- 819
- Cooling degree days
- 0
Winona in March
Highs average 57°14° and lows 31°−1°, with 4.7 in120 mm of precipitation in a typical March.
- Record high
- 94°34° (2026)
- Record low
- 3°−16° (2019)
- Heating degree days
- 653
- Cooling degree days
- 1
Winona in April
Highs average 67°19° and lows 39°4°, with 5.3 in135 mm of precipitation in a typical April.
- Record high
- 89°32° (2012)
- Record low
- 18°−8° (2021)
- Heating degree days
- 363
- Cooling degree days
- 6
Winona in May
Highs average 75°24° and lows 50°10°, with 6.6 in167 mm of precipitation in a typical May.
- Record high
- 93°34° (2012)
- Record low
- 28°−2° (2020)
- Heating degree days
- 134
- Cooling degree days
- 65
Winona in June
Highs average 83°28° and lows 60°15°, with 4 in101 mm of precipitation in a typical June.
- Record high
- 106°41° (2012)
- Record low
- 42°6° (2019)
- Heating degree days
- 11
- Cooling degree days
- 203
Winona in July
Highs average 88°31° and lows 64°18°, with 4.3 in109 mm of precipitation in a typical July.
- Record high
- 106°41° (2012)
- Record low
- 48°9° (2013)
- Heating degree days
- 1
- Cooling degree days
- 339
Winona in August
Highs average 87°31° and lows 62°16°, with 3.8 in97 mm of precipitation in a typical August.
- Record high
- 104°40° (2011)
- Record low
- 45°7° (2025)
- Heating degree days
- 3
- Cooling degree days
- 292
Winona in September
Highs average 80°27° and lows 53°11°, with 4.1 in103 mm of precipitation in a typical September.
- Record high
- 105°41° (2026)
- Record low
- 34°1° (2022)
- Heating degree days
- 76
- Cooling degree days
- 110
Winona in OctoberThis month
Highs average 69°20° and lows 41°5°, with 3.7 in94 mm of precipitation in a typical October.
- Record high
- 94°34° (2026)
- Record low
- 15°−9° (2017)
- Heating degree days
- 333
- Cooling degree days
- 17
Winona in November
Highs average 56°13° and lows 31°−1°, with 4.6 in116 mm of precipitation in a typical November.
- Record high
- 83°28° (2016)
- Record low
- 7°−14° (2019)
- Heating degree days
- 645
- Cooling degree days
- 1
Winona in December
Highs average 46°8° and lows 23°−5°, with 3.4 in86 mm of precipitation in a typical December.
- Record high
- 78°26° (2025)
- Record low
- −8°−22° (2022)
- Heating degree days
- 947
- Cooling degree days
- 0