The hottest, coldest, wettest and snowiest days Winona has
recorded — the outer limits of what its weather can do, and how far
they sit beyond a normal day.
Based on 19 years of daily weather observations (2006–present), from the Wioa Muni-Max Conrad Fd Ap station 6 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.
The four kinds of extreme
The hottest, coldest, wettest and snowiest single days Winona
has recorded — each shown against what a normal day that time of year
looks like.
🔥Hottest day
104°FAug 23, 2023
The three most extreme on record
1104°FAug 23, 2023recent
2102°FJul 31, 2006
3102°FJul 6, 2012
❄️Coldest night
-29°FJan 16, 2009
The three most extreme on record
1-29°FJan 16, 2009
2-22°FMar 4, 2019
3-22°FJan 26, 2022
🌧️Most rain in one day
4.64 inOct 25, 2023
The three most extreme on record
14.64 inOct 25, 2023recent
23.44 inAug 28, 2021
32.73 inJun 18, 2021
In plain terms
Across the record, Winona has reached as high as 104°F and as low as −29°F. A single day has delivered over 5 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at LA Crosse Municipal Airport, a weather station, about 36 km from the city centre. The underlying daily records come from NOAA's global station network.