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Sri Jayewardenepura Kotte weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Sri Jayewardenepura Kotte?
For a warm holiday, the best week has been 1–7 January (Weather Index 80). Favourable start dates for a 7-day trip run from 21 December to 24 January. February and March are warmest (34°C), February is driest and February, March and April have the most sun.
- Warmest
- February and March 34°C
- Coolest
- June to November 30°C
- Driest
- February 26% rain-day chance
- Wettest
- June 97% rain-day chance
- Sunniest
- February, March and April 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 Sri Jayewardenepura Kotte
Sri Jayewardenepura Kotte 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 | 32.2 | 23.5 | 29.7 | 9.2 | 85.5 | 10.3 |
| February | 33.8 | 24.2 | 26.4 | 7.4 | 47.3 | 11.2 |
| March | 33.9 | 25.2 | 50.6 | 15.7 | 90.0 | 10.9 |
| April | 33.1 | 25.5 | 83.3 | 25.0 | 161.2 | 10.5 |
| May | 31.1 | 25.8 | 94.8 | 29.4 | 359.3 | 8.7 |
| June | 30.3 | 25.8 | 97.0 | 29.1 | 252.8 | 9.7 |
| July | 30.1 | 25.6 | 88.4 | 27.4 | 196.3 | 9.9 |
| August | 29.9 | 25.4 | 89.0 | 27.6 | 226.8 | 9.8 |
| September | 29.9 | 25.1 | 91.7 | 27.5 | 238.3 | 9.2 |
| October | 30.0 | 24.5 | 92.6 | 28.7 | 373.5 | 8.5 |
| November | 30.3 | 24.0 | 82.7 | 24.8 | 400.4 | 8.1 |
| December | 31.0 | 23.7 | 52.3 | 16.2 | 146.4 | 9.6 |
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.