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Sri Lanka
Moratuwa weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Moratuwa?
For a warm holiday, the best week has been 15–21 January (Weather Index 78). Favourable start dates for a 7-day trip run from 23 December to 27 January. February and March are warmest (33°C), February is driest and February and March have the most sun.
- Warmest
- February and March 33°C
- Coolest
- June to November 30°C
- Driest
- February 33% rain-day chance
- Wettest
- May and June 97% rain-day chance
- Sunniest
- February and March 11 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 Moratuwa
Moratuwa 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 | 31.6 | 23.5 | 41.3 | 12.8 | 114.8 | 10.3 |
| February | 32.6 | 24.2 | 33.2 | 9.3 | 68.7 | 11.1 |
| March | 32.6 | 24.9 | 57.4 | 17.8 | 120.6 | 10.9 |
| April | 32.4 | 25.3 | 87.0 | 26.1 | 170.2 | 10.4 |
| May | 30.8 | 25.9 | 96.8 | 30.0 | 371.0 | 8.6 |
| June | 30.1 | 25.9 | 97.3 | 29.2 | 266.7 | 9.7 |
| July | 29.9 | 25.7 | 91.3 | 28.3 | 203.1 | 9.7 |
| August | 29.7 | 25.4 | 89.7 | 27.8 | 218.2 | 9.7 |
| September | 29.7 | 25.1 | 93.7 | 28.1 | 244.6 | 9.2 |
| October | 29.8 | 24.6 | 93.2 | 28.9 | 335.1 | 8.5 |
| November | 30.2 | 24.1 | 84.3 | 25.3 | 387.5 | 8.0 |
| December | 30.7 | 23.7 | 59.0 | 18.3 | 185.1 | 9.5 |
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.