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Oshkosh climate
Typical historical weather for Oshkosh, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Data last updated: 31 December 2025
Want today's actual conditions instead? See the current forecast for Oshkosh. Planning a garden? See the gardening & growing season planner. Or browse the 365-day climate calendar.
Annual average
10.4°C
across all months
Warmest month
31.3°C
Jul average high
Coolest month
-7.7°C
Feb average low
Annual rainfall
482mm
total per year
Oshkosh is typically hottest in July and coolest in February, a swing of about 39°C across the year. About 45% of annual rainfall falls in the three wettest months (May is typically wettest, December 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 | 4.1°C · record 14.4°C–17.1°C | -7.5°C · record -26°C–-12.6°C | 18mm | 4 | 63% | 4.3 m/s | 48% | 2.5 kWh/m² |
| Feb | 5.1°C · record 13.5°C–25.4°C | -7.7°C · record -35.3°C–-12.1°C | 19mm | 5 | 59% | 4.6 m/s | 48% | 3.6 kWh/m² |
| Mar | 11.7°C · record 20.4°C–28.1°C | -2.3°C · record -24.9°C–-6.6°C | 47mm | 7 | 57% | 4.7 m/s | 52% | 4.8 kWh/m² |
| Apr | 16°C · record 25.5°C–33.9°C | 1.2°C · record -14°C–-1.6°C | 59mm | 8 | 54% | 5.2 m/s | 51% | 6 kWh/m² |
| May | 20.4°C · record 27°C–33.6°C | 7.7°C · record -4.2°C–4.4°C | 105mm | 13 | 63% | 4.6 m/s | 54% | 6.4 kWh/m² |
| Jun | 28.6°C · record 30.9°C–41.1°C | 14.7°C · record 5.7°C–10.2°C | 54mm | 9 | 56% | 4.3 m/s | 44% | 7.4 kWh/m² |
| Jul | 31.3°C · record 35.6°C–40.3°C | 17.4°C · record 9.7°C–14.8°C | 45mm | 10 | 59% | 4 m/s | 41% | 7.2 kWh/m² |
| Aug | 30°C · record 34.3°C–39.2°C | 16°C · record 8°C–12.3°C | 41mm | 8 | 60% | 4 m/s | 39% | 6.4 kWh/m² |
| Sep | 26.8°C · record 33.1°C–38.6°C | 11.8°C · record 1.5°C–6.4°C | 35mm | 6 | 55% | 4.2 m/s | 34% | 5.3 kWh/m² |
| Oct | 17.7°C · record 27.3°C–31.4°C | 3.3°C · record -18.2°C–-1.6°C | 26mm | 5 | 57% | 4.5 m/s | 36% | 3.8 kWh/m² |
| Nov | 12°C · record 19.5°C–27.5°C | -2°C · record -18.9°C–-5.7°C | 18mm | 4 | 57% | 4.3 m/s | 42% | 2.7 kWh/m² |
| Dec | 6.6°C · record 11.9°C–23.6°C | -6°C · record -29.7°C–-9.5°C | 17mm | 3 | 58% | 4.6 m/s | 46% | 2.2 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 +0.3°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 -242.41mm per decade over the same period.
2025 (the most recent year on file) averaged 10.9°C, above the 9-year baseline of 10.5°C by 0.76 standard deviations.
Typical extremes per year
Rainy days
82 days
≥1.0mm rain
Heavy rain days
3.5 days
≥20mm rain
Extreme heat days
0.4 days
daily high ≥40°C
Frost days
143.5 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
41.1°C
13 June 2022
2022 was 0.06 SD above the 9-year average that year
Coldest day
-35.3°C
15 February 2021
2021 was 1.32 SD above the 9-year average that year
Wettest day
47.1mm
16 April 2016
2016 was 0.71 SD above the 9-year average that year
Windiest day
13m/s
14 January 2021
2021 was 1.32 SD above the 9-year average that year
See the detail: Oshkosh on 16 April 2016.
Nearby cities
Frequently asked questions about Oshkosh's climate
What is the hottest month in Oshkosh?
July is typically the warmest month in Oshkosh, with an average high of 31.3°C. February is typically the coolest, averaging -7.7°C overnight.
How much does it rain in Oshkosh?
Oshkosh gets about 482mm of rain a year on average, with roughly 45% of it falling in the three wettest months (May is typically the wettest, December the driest).
How many extremely hot or cold days does Oshkosh have?
On average, Oshkosh sees about 0.4 day(s) a year at or above 40°C and about 143.5 day(s) at or below 0°C, based on 10 years of data.
Is Oshkosh getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about +0.3°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 Oshkosh?
The hottest day on file is 13 June 2022 at 41.1°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
- Oshkosh — 41.500°, -102.250°, ERA5 grid cell center, 13.2 km from requested point
- Time zone
- America/Denver
- 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 (2026-07-21). Historical climate data for Oshkosh, United States (41.50°N, 102.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Oshkosh, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Oshkosh, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Oshkosh, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.