Oklahoma City weather by month
Oklahoma City runs from about 1°C in January to 29°C in August, with November the wettest month at 184 mm.
warmest month
August
29°C
coolest month
January
1°C
wettest month
November
184 mm
worst air month
August
10 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 1°C | 78 mm | 208 h | 10 |
| February | 10°C | 45 mm | 254 h | 7 |
| March | 13°C | 50 mm | 280 h | 6 |
| April | 17°C | 87 mm | 302 h | 6 |
| May | 22°C | 97 mm | 339 h | 7 |
| June | 28°C | 59 mm | 369 h | 8 |
| July | 28°C | 110 mm | 371 h | 8 |
| August | 29°C | 77 mm | 368 h | 10 |
| September | 24°C | 88 mm | 328 h | 9 |
| October | 21°C | 15 mm | 331 h | 6 |
| November | 12°C | 184 mm | 244 h | 4 |
| December | 8°C | 23 mm | 224 h | 6 |
About 3,618 hours of sun a year. Roughly 93 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.