Jackson weather by month
Jackson runs from about 7°C in January to 28°C in August, with May the wettest month at 235 mm.
warmest month
August
28°C
coolest month
January
7°C
wettest month
May
235 mm
worst air month
August
15 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 7°C | 169 mm | 213 h | 9 |
| February | 12°C | 87 mm | 222 h | 9 |
| March | 15°C | 193 mm | 255 h | 6 |
| April | 19°C | 171 mm | 266 h | 6 |
| May | 24°C | 235 mm | 319 h | 8 |
| June | 26°C | 78 mm | 366 h | 9 |
| July | 27°C | 128 mm | 329 h | 11 |
| August | 28°C | 47 mm | 356 h | 15 |
| September | 24°C | 134 mm | 292 h | 13 |
| October | 20°C | 14 mm | 334 h | 6 |
| November | 17°C | 188 mm | 251 h | 7 |
| December | 11°C | 83 mm | 231 h | 8 |
About 3,434 hours of sun a year. Roughly 153 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.