Stockholm weather by month
Stockholm runs from about -4°C in January to 18°C in July, with July the wettest month at 103 mm.
warmest month
July
18°C
coolest month
January
-4°C
wettest month
July
103 mm
worst air month
March
7 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -4°C | 48 mm | 50 h | 5 |
| February | 0°C | 57 mm | 84 h | 5 |
| March | 2°C | 28 mm | 173 h | 7 |
| April | 4°C | 62 mm | 176 h | 4 |
| May | 13°C | 24 mm | 439 h | 3 |
| June | 17°C | 70 mm | 455 h | 4 |
| July | 18°C | 103 mm | 411 h | 5 |
| August | 18°C | 38 mm | 377 h | 4 |
| September | 14°C | 75 mm | 253 h | 5 |
| October | 9°C | 76 mm | 184 h | 4 |
| November | 3°C | 25 mm | 120 h | 6 |
| December | 1°C | 42 mm | 54 h | 5 |
About 2,776 hours of sun a year. Roughly 66 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.