Nashville weather by month
Nashville runs from about 2°C in January to 26°C in July, with September the wettest month at 273 mm.
warmest month
July
26°C
coolest month
January
2°C
wettest month
September
273 mm
worst air month
September
11 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 2°C | 139 mm | 182 h | 10 |
| February | 9°C | 121 mm | 222 h | 10 |
| March | 12°C | 82 mm | 269 h | 7 |
| April | 16°C | 162 mm | 275 h | 6 |
| May | 21°C | 183 mm | 310 h | 6 |
| June | 25°C | 155 mm | 348 h | 9 |
| July | 26°C | 139 mm | 344 h | 11 |
| August | 26°C | 44 mm | 382 h | 11 |
| September | 23°C | 273 mm | 272 h | 11 |
| October | 17°C | 11 mm | 318 h | 5 |
| November | 13°C | 140 mm | 196 h | 7 |
| December | 7°C | 134 mm | 173 h | 8 |
About 3,291 hours of sun a year. Roughly 157 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.