Raleigh weather by month
Raleigh runs from about 6°C in January to 26°C in July, with September the wettest month at 206 mm.
warmest month
July
26°C
coolest month
January
6°C
wettest month
September
206 mm
worst air month
February
13 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 6°C | 119 mm | 208 h | 11 |
| February | 8°C | 61 mm | 239 h | 13 |
| March | 13°C | 154 mm | 258 h | 9 |
| April | 17°C | 42 mm | 307 h | 8 |
| May | 21°C | 137 mm | 326 h | 8 |
| June | 26°C | 46 mm | 383 h | 10 |
| July | 26°C | 204 mm | 303 h | 12 |
| August | 24°C | 164 mm | 323 h | 11 |
| September | 22°C | 206 mm | 271 h | 9 |
| October | 16°C | 6 mm | 310 h | 7 |
| November | 13°C | 65 mm | 246 h | 8 |
| December | 7°C | 70 mm | 234 h | 10 |
About 3,408 hours of sun a year. Roughly 128 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.