Dehradun weather by month
Dehradun runs from about 11°C in January to 30°C in June, with July the wettest month at 445 mm.
warmest month
June
30°C
coolest month
January
11°C
wettest month
July
445 mm
worst air month
December
56 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 11°C | 3 mm | 297 h | 52 |
| February | 13°C | 91 mm | 261 h | 39 |
| March | 18°C | 46 mm | 316 h | 30 |
| April | 23°C | 1 mm | 335 h | 16 |
| May | 28°C | 35 mm | 369 h | 29 |
| June | 30°C | 73 mm | 333 h | 30 |
| July | 27°C | 445 mm | 271 h | 27 |
| August | 26°C | 341 mm | 253 h | 27 |
| September | 25°C | 211 mm | 262 h | 29 |
| October | 22°C | 1 mm | 338 h | 27 |
| November | 17°C | 0 mm | 289 h | 33 |
| December | 12°C | 18 mm | 265 h | 56 |
About 3,589 hours of sun a year. Roughly 108 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.