Lamu weather by month
Lamu runs from about 26°C in August to 30°C in March, with April the wettest month at 314 mm.
warmest month
March
30°C
coolest month
August
26°C
wettest month
April
314 mm
worst air month
February
12 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 29°C | 36 mm | 355 h | 11 |
| February | 29°C | 15 mm | 324 h | 12 |
| March | 30°C | 42 mm | 349 h | 7 |
| April | 28°C | 314 mm | 265 h | 3 |
| May | 28°C | 153 mm | 300 h | 7 |
| June | 27°C | 92 mm | 331 h | 8 |
| July | 26°C | 79 mm | 326 h | 7 |
| August | 26°C | 58 mm | 334 h | 7 |
| September | 26°C | 47 mm | 352 h | 7 |
| October | 27°C | 46 mm | 367 h | 7 |
| November | 28°C | 113 mm | 350 h | 8 |
| December | 28°C | 49 mm | 367 h | 9 |
About 4,020 hours of sun a year. Roughly 104 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.