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Watamu weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Watamu?
For a warm holiday, the best week has been 4–10 September (Weather Index 98). Favourable start dates for a 7-day trip run from 14 July to 20 September. March is warmest (32°C), February is driest and October to February have the most sun.
- Warmest
- March 32°C
- Coolest
- June to September 28°C
- Driest
- February 5% rain-day chance
- Wettest
- April 76% rain-day chance
- Sunniest
- October to February 12 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Watamu
Watamu historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 30.9 | 25.3 | 8.4 | 2.6 | 11.1 | 11.5 |
| February | 31.1 | 25.3 | 5.4 | 1.5 | 7.3 | 11.6 |
| March | 31.9 | 26.0 | 27.4 | 8.5 | 34.6 | 11.2 |
| April | 31.1 | 26.0 | 76.0 | 22.8 | 136.8 | 10.0 |
| May | 29.2 | 25.3 | 65.8 | 20.4 | 167.8 | 9.9 |
| June | 28.3 | 24.5 | 50.0 | 15.0 | 58.5 | 10.9 |
| July | 27.6 | 23.7 | 42.9 | 13.3 | 38.6 | 10.9 |
| August | 27.6 | 23.4 | 42.3 | 13.1 | 33.9 | 11.1 |
| September | 28.3 | 23.8 | 36.0 | 10.8 | 34.2 | 11.5 |
| October | 29.2 | 24.4 | 41.0 | 12.7 | 87.2 | 11.5 |
| November | 30.2 | 25.2 | 50.0 | 15.0 | 77.6 | 11.6 |
| December | 30.9 | 25.6 | 32.6 | 10.1 | 43.3 | 11.7 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.