Thiruvananthapuram weather by month
Thiruvananthapuram runs from about 26°C in October to 29°C in April, with May the wettest month at 749 mm.
warmest month
April
29°C
coolest month
October
26°C
wettest month
May
749 mm
worst air month
December
34 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 27°C | 76 mm | 329 h | 29 |
| February | 28°C | 15 mm | 340 h | 28 |
| March | 28°C | 54 mm | 369 h | 21 |
| April | 29°C | 162 mm | 351 h | 18 |
| May | 27°C | 749 mm | 216 h | 10 |
| June | 26°C | 407 mm | 215 h | 9 |
| July | 26°C | 287 mm | 238 h | 10 |
| August | 26°C | 282 mm | 275 h | 11 |
| September | 26°C | 116 mm | 304 h | 10 |
| October | 26°C | 380 mm | 264 h | 11 |
| November | 26°C | 225 mm | 229 h | 16 |
| December | 26°C | 84 mm | 303 h | 34 |
About 3,433 hours of sun a year. Roughly 221 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.