Kansas City weather by month
Kansas City runs from about -4°C in January to 26°C in July, with May the wettest month at 186 mm.
warmest month
July
26°C
coolest month
January
-4°C
wettest month
May
186 mm
worst air month
August
12 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -4°C | 61 mm | 157 h | 9 |
| February | 6°C | 13 mm | 263 h | 11 |
| March | 10°C | 67 mm | 283 h | 7 |
| April | 15°C | 164 mm | 304 h | 6 |
| May | 20°C | 186 mm | 344 h | 6 |
| June | 25°C | 118 mm | 380 h | 9 |
| July | 26°C | 132 mm | 380 h | 10 |
| August | 25°C | 86 mm | 351 h | 12 |
| September | 22°C | 48 mm | 312 h | 11 |
| October | 17°C | 62 mm | 323 h | 6 |
| November | 9°C | 132 mm | 198 h | 6 |
| December | 3°C | 35 mm | 197 h | 8 |
About 3,492 hours of sun a year. Roughly 111 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.