Home / United States / Winona
Winona climate
Typical historical weather for Winona, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Want today's actual conditions instead? See the current forecast for Winona. Planning a garden? See the gardening & growing season planner. Or browse the 365-day climate calendar.
Annual average
18.5°C
across all months
Warmest month
33°C
Jul average high
Coolest month
2.6°C
Jan average low
Annual rainfall
1376mm
total per year
Winona is typically hottest in July and coolest in January, a swing of about 30.4°C across the year. About 34% of annual rainfall falls in the three wettest months (March is typically wettest, September driest).
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
| Month | Avg high | Avg low | Rainfall | Wet days | Humidity | Wind | Cloud | Solar |
|---|---|---|---|---|---|---|---|---|
| Jan | 12.5°C · record 20.6–25.1°C | 2.6°C · record -13.4–-1.9°C | 138mm | 11 | 70% | 3.2 m/s | 56% | 2.7 kWh/m² |
| Feb | 16.4°C · record 22.2–29.2°C | 5.7°C · record -12.5–-1.5°C | 162mm | 13 | 71% | 3.3 m/s | 61% | 3.1 kWh/m² |
| Mar | 20.5°C · record 24.6–30.5°C | 9.4°C · record -3.8–3°C | 165mm | 12 | 66% | 3.3 m/s | 59% | 4.4 kWh/m² |
| Apr | 23.5°C · record 27.1–30.9°C | 12.6°C · record 0.3–7.3°C | 142mm | 11 | 68% | 3.2 m/s | 55% | 5.5 kWh/m² |
| May | 27.9°C · record 30.5–35.6°C | 17.9°C · record 6.5–13.6°C | 103mm | 13 | 72% | 2.6 m/s | 56% | 6.1 kWh/m² |
| Jun | 31.7°C · record 32.7–38.7°C | 21.8°C · record 15.1–18.8°C | 106mm | 13 | 71% | 2.3 m/s | 55% | 6.3 kWh/m² |
| Jul | 33°C · record 35.2–37.5°C | 23.5°C · record 17.8–22°C | 99mm | 15 | 74% | 2.1 m/s | 55% | 6.2 kWh/m² |
| Aug | 32.7°C · record 34.6–38.8°C | 22.7°C · record 16.1–22.1°C | 101mm | 13 | 73% | 2.1 m/s | 51% | 5.7 kWh/m² |
| Sep | 31°C · record 33.3–38.1°C | 19.9°C · record 9.9–19.1°C | 73mm | 8 | 69% | 2.3 m/s | 42% | 5.1 kWh/m² |
| Oct | 25.8°C · record 29.8–37°C | 13.6°C · record 0.4–7°C | 81mm | 7 | 68% | 2.7 m/s | 38% | 4.1 kWh/m² |
| Nov | 18.9°C · record 23.2–30.4°C | 7.3°C · record -6.4–1.5°C | 87mm | 9 | 71% | 2.8 m/s | 46% | 3.1 kWh/m² |
| Dec | 14.9°C · record 21.3–26.4°C | 5°C · record -13.8–0.5°C | 117mm | 11 | 73% | 3.1 m/s | 58% | 2.3 kWh/m² |
"Avg high"/"Avg low" is the mean daily high/low for that month, averaged across every year on file. The "record" figure alongside it is a different statistic — the single hottest (or coldest) hour ever recorded during that month across all years — so it can sit above or below the average and does not describe the average's year-to-year spread. A "wet day" is any day with at least 1.0mm of rain.
Year to year
Annual average temperature, 2016–2025.
Across these 10 years, the annual average has moved by about -0.01°C per decade. That’s a short window for a reliable long-term climate trend — treat it as indicative, not definitive.
Annual rainfall has moved by about -122.48mm per decade over the same period.
2025 (the most recent year on file) averaged 18.543261955644464°C, below the 9-year baseline of 18.56°C by 0.06 standard deviations.
Typical extremes per year
Rainy days
134.5 days
≥1.0mm rain
Heavy rain days
18.8 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
27.7 days
daily low ≤0°C
Averaged across 10 years on file. Thresholds match PastClimate's data pipeline definitions — see data & sources.
Records on file
Ranked across 10 years of data currently on file (2016–2025).
Hottest day
38.8°C
24 August 2023
2023 was 1.97 SD above the 9-year average that year
Coldest day
-13.8°C
23 December 2022
2022 was 0.68 SD below the 9-year average that year
Wettest day
80.8mm
2 January 2020
2020 was 0.49 SD below the 9-year average that year
Windiest day
6.9m/s
8 June 2020
2020 was 0.49 SD below the 9-year average that year
See the detail: Winona on 2 January 2020.
Nearby cities
Carrollton
23.2 km away
Grenada
27.8 km away
Greenwood
46.4 km away
Eupora
46.4 km away
Walthall
46.4 km away
Tchula
54.1 km away
Want a side-by-side view instead? Compare Winona with another city.
Frequently asked questions about Winona's climate
What is the hottest month in Winona?
July is typically the warmest month in Winona, with an average high of 33°C. January is typically the coolest, averaging 2.6°C overnight.
How much does it rain in Winona?
Winona gets about 1376mm of rain a year on average, with roughly 34% of it falling in the three wettest months (March is typically the wettest, September the driest).
How many extremely hot or cold days does Winona have?
On average, Winona sees about 0 day(s) a year at or above 40°C and about 27.7 day(s) at or below 0°C, based on 10 years of data.
Is Winona getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about -0.01°C per decade. That's a short window for a reliable long-term climate trend — treat it as indicative, not definitive.
What is the hottest day on record for Winona?
The hottest day on file is 24 August 2023 at 38.8°C, out of 10 year(s) searched.
Data & provenance
↓ Download monthly CSVData source & coverage — ERA5 reanalysis, 2016–2025 (10 years)details
- Source
- ERA5 reanalysis, accessed via the Copernicus Climate Change Service (C3S) Climate Data Store
- Data type
- Reanalysis — a physically consistent reconstruction combining a forecast model with historical observations, not a live station reading or a forecast
- Coverage
- 2016–2025 (10 years) for United States
- Location
- Winona — 33.500°, -89.750°, ERA5 grid cell center, 2.8 km from requested point
- Time zone
- America/Chicago
- What's shown here
- Monthly and annual averages, and dated extreme-value records, derived from an hourly base record.
- Spatial resolution
- 0.25° (~25 km) distributed grid — ERA5's native model resolution is finer; this is the publicly distributed regridded product
- Version / refreshed
- Methodology v2026.07 · data last refreshed December 31, 2025
- Limitations
- A model reconstruction, not a station observation — hyper-local extremes (a single storm cell, an urban heat pocket) can differ from a nearby gauge. See the full methodology.
- Attribution
- Generated using Copernicus Climate Change Service information
Cite this data
PastClimate (2026-07-18). Historical climate data for Winona, United States (33.50°N, 89.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Winona, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Winona, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Winona, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.