Munnar weather by month
Munnar runs from about 17°C in January to 21°C in April, with June the wettest month at 852 mm.
warmest month
April
21°C
coolest month
January
17°C
wettest month
June
852 mm
worst air month
February
31 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 17°C | 170 mm | 323 h | 30 |
| February | 18°C | 38 mm | 337 h | 31 |
| March | 20°C | 27 mm | 370 h | 26 |
| April | 21°C | 68 mm | 355 h | 22 |
| May | 20°C | 829 mm | 232 h | 12 |
| June | 18°C | 852 mm | 160 h | 6 |
| July | 17°C | 796 mm | 138 h | 5 |
| August | 18°C | 413 mm | 230 h | 6 |
| September | 18°C | 232 mm | 291 h | 7 |
| October | 18°C | 416 mm | 240 h | 11 |
| November | 17°C | 266 mm | 245 h | 22 |
| December | 17°C | 148 mm | 305 h | 31 |
About 3,226 hours of sun a year. Roughly 246 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 2026-05-25. Full method, licences and the list of sources we rejected are on the methodology page.