Regensburg weather by month
Regensburg runs from about 1°C in January to 21°C in August, with September the wettest month at 136 mm.
warmest month
August
21°C
coolest month
January
1°C
wettest month
September
136 mm
worst air month
December
16 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 1°C | 76 mm | 128 h | 14 |
| February | 6°C | 70 mm | 121 h | 13 |
| March | 8°C | 33 mm | 258 h | 14 |
| April | 10°C | 62 mm | 267 h | 9 |
| May | 15°C | 115 mm | 305 h | 6 |
| June | 18°C | 102 mm | 334 h | 7 |
| July | 20°C | 64 mm | 374 h | 5 |
| August | 21°C | 61 mm | 355 h | 8 |
| September | 16°C | 136 mm | 243 h | 7 |
| October | 11°C | 54 mm | 159 h | 8 |
| November | 4°C | 45 mm | 94 h | 14 |
| December | 1°C | 49 mm | 105 h | 16 |
About 2,743 hours of sun a year. Roughly 87 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 2026-05-27. Full method, licences and the list of sources we rejected are on the methodology page.