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Okmulgee climate
Typical historical weather for Okmulgee, 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 Okmulgee. Planning a garden? See the gardening & growing season planner. Or browse the 365-day climate calendar.
Annual average
17.2°C
across all months
Warmest month
33.8°C
Jul average high
Coolest month
-0.5°C
Jan average low
Annual rainfall
1165mm
total per year
Okmulgee is typically hottest in July and coolest in January, a swing of about 34.3°C across the year. About 39% 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 | 10°C · record 17.1°C–24.9°C | -0.5°C · record -16.7°C–-4.2°C | 66mm | 7 | 66% | 3.5 m/s | 48% | 2.7 kWh/m² |
| Feb | 12.9°C · record 20.5°C–30.2°C | 1.6°C · record -24.7°C–-3.9°C | 70mm | 8 | 65% | 3.8 m/s | 55% | 3.4 kWh/m² |
| Mar | 18.8°C · record 22.8°C–34.1°C | 7.6°C · record -13°C–1.5°C | 104mm | 10 | 62% | 4.1 m/s | 50% | 4.5 kWh/m² |
| Apr | 22.1°C · record 26.9°C–34.2°C | 11.2°C · record -2.9°C–5.1°C | 169mm | 11 | 64% | 4.1 m/s | 53% | 5.3 kWh/m² |
| May | 26.3°C · record 30.1°C–35.3°C | 16.6°C · record 6.1°C–13.6°C | 177mm | 13 | 71% | 3.4 m/s | 56% | 5.8 kWh/m² |
| Jun | 31.6°C · record 34.3°C–37.3°C | 21.7°C · record 12.8°C–17.4°C | 104mm | 8 | 69% | 3.1 m/s | 48% | 6.7 kWh/m² |
| Jul | 33.8°C · record 36.3°C–42.9°C | 23.6°C · record 18.2°C–22.6°C | 80mm | 8 | 68% | 2.8 m/s | 43% | 6.7 kWh/m² |
| Aug | 33.2°C · record 35.8°C–41°C | 22.8°C · record 16.8°C–19.7°C | 78mm | 9 | 68% | 2.8 m/s | 44% | 6 kWh/m² |
| Sep | 30.4°C · record 34.1°C–37.9°C | 19.3°C · record 8.6°C–21°C | 89mm | 7 | 67% | 2.9 m/s | 38% | 5.2 kWh/m² |
| Oct | 24.1°C · record 31.6°C–33.4°C | 12.6°C · record -2.4°C–6.5°C | 106mm | 9 | 65% | 3.6 m/s | 37% | 4 kWh/m² |
| Nov | 17.8°C · record 23.1°C–29.8°C | 6.3°C · record -8.7°C–-0.4°C | 66mm | 6 | 66% | 3.6 m/s | 42% | 2.9 kWh/m² |
| Dec | 12.7°C · record 18.7°C–28.6°C | 2.6°C · record -15.8°C–-2.2°C | 57mm | 6 | 66% | 3.5 m/s | 50% | 2.4 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 +0.2°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 +207.69mm per decade over the same period.
2025 (the most recent year on file) averaged 17.4°C, above the 9-year baseline of 17.3°C by 0.19 standard deviations.
Typical extremes per year
Rainy days
102.1 days
≥1.0mm rain
Heavy rain days
15.6 days
≥20mm rain
Extreme heat days
0.9 days
daily high ≥40°C
Frost days
43.4 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
42.9°C
20 July 2018
2018 was 1.54 SD below the 9-year average that year
Coldest day
-24.7°C
16 February 2021
2021 was 0.37 SD below the 9-year average that year
Wettest day
122.2mm
29 April 2017
2017 was 0.78 SD above the 9-year average that year
Windiest day
9.2m/s
19 March 2025
2025 was 0.19 SD above the 9-year average that year
See the detail: Okmulgee on 29 April 2017.
Nearby cities
Frequently asked questions about Okmulgee's climate
What is the hottest month in Okmulgee?
July is typically the warmest month in Okmulgee, with an average high of 33.8°C. January is typically the coolest, averaging -0.5°C overnight.
How much does it rain in Okmulgee?
Okmulgee gets about 1165mm of rain a year on average, with roughly 39% of it falling in the three wettest months (May is typically the wettest, December the driest).
How many extremely hot or cold days does Okmulgee have?
On average, Okmulgee sees about 0.9 day(s) a year at or above 40°C and about 43.4 day(s) at or below 0°C, based on 10 years of data.
Is Okmulgee getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about +0.24°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 Okmulgee?
The hottest day on file is 20 July 2018 at 42.9°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
- Okmulgee — 35.500°, -96.000°, ERA5 grid cell center, 14.2 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 (2026-07-20). Historical climate data for Okmulgee, United States (35.50°N, 96.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Okmulgee, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Okmulgee, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Okmulgee, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.