Cleveland weather by month
Cleveland runs from about -1°C in January to 23°C in July, with August the wettest month at 150 mm.
warmest month
July
23°C
coolest month
January
-1°C
wettest month
August
150 mm
worst air month
February
12 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -1°C | 112 mm | 91 h | 7 |
| February | 2°C | 28 mm | 232 h | 12 |
| March | 4°C | 71 mm | 224 h | 9 |
| April | 10°C | 129 mm | 282 h | 9 |
| May | 16°C | 95 mm | 351 h | 8 |
| June | 21°C | 115 mm | 361 h | 7 |
| July | 23°C | 84 mm | 389 h | 12 |
| August | 22°C | 150 mm | 363 h | 11 |
| September | 20°C | 75 mm | 284 h | 10 |
| October | 15°C | 85 mm | 298 h | 5 |
| November | 9°C | 99 mm | 151 h | 6 |
| December | 2°C | 133 mm | 107 h | 7 |
About 3,133 hours of sun a year. Roughly 119 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 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.