Climate averages 1991–2020
Kalmunai weather
in August.
A hot, moderately wet month: the 3rd warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Kalmunai: daytime highs average 32.8°C and nights cool to about 26.1°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 42 mm of rain on roughly 9 days, which makes August a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 22 min on an average August day.
The nearest other city in this atlas is Batticaloa (37 km away). In August its highs average 34.2°C, 1.4°C warmer than Kalmunai, with 31 mm of rain.
Among the 12 cities listed in Sri Lanka, Kalmunai ranks 3rd of 12 for the warmest August highs and 3rd of 12 for the driest August (rainfall, lowest first). The mean August high of those 12 cities is 30.0°C; Kalmunai is 2.8°C warmer than that mean.
From August to September, average highs fall by 0.8°C to 32.0°C, and monthly rainfall rises from 42 mm to 67 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Kalmunai climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.0°C24.0°C | 24.0°C | 186 | 17.8 | 11.712 h |
| February | 27.8°C24.1°C | 24.1°C | 96 | 13.2 | 11.912 h |
| March | 29.5°C24.7°C | 24.7°C | 60 | 10.0 | 12.112 h |
| April | 30.8°C25.8°C | 25.8°C | 70 | 13.3 | 12.312 h |
| May | 32.3°C26.6°C | 26.6°C | 59 | 11.6 | 12.512 h |
| June | 33.2°C26.6°C | 26.6°C | 31 | 6.7 | 12.513 h |
| July | 33.2°C26.4°C | 26.4°C | 31 | 7.5 | 12.513 h |
| August, selected | 32.8°C26.1°C | 26.1°C | 42 | 9.3 | 12.412 h |
| September | 32.0°C25.9°C | 25.9°C | 67 | 13.6 | 12.212 h |
| October | 30.2°C25.2°C | 25.2°C | 164 | 20.8 | 12.012 h |
| November | 28.2°C24.5°C | 24.5°C | 280 | 24.8 | 11.812 h |
| December | 27.2°C24.2°C | 24.2°C | 310 | 22.6 | 11.712 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Batticaloa in AugustSri Lanka · 37 kmHigh 34.2°C · Low 26.1°C · 31 mm rain
- Kandy in AugustSri Lanka · 133 kmHigh 26.8°C · Low 21.1°C · 90 mm rain
- Trincomalee in AugustSri Lanka · 146 kmHigh 33.3°C · Low 26.0°C · 45 mm rain
- Ambalantota in AugustSri Lanka · 169 kmHigh 31.2°C · Low 25.3°C · 52 mm rain
- Matara in AugustSri Lanka · 217 kmHigh 28.2°C · Low 24.7°C · 159 mm rain
- Negombo in AugustSri Lanka · 222 kmHigh 28.4°C · Low 25.0°C · 165 mm rain
- Colombo in AugustSri Lanka · 225 kmHigh 28.4°C · Low 24.6°C · 168 mm rain
- Dehiwala-Mount Lavinia in AugustSri Lanka · 226 kmHigh 28.1°C · Low 24.7°C · 183 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Kalmunai) is explained once on the Kalmunai year overview and on the Sources, method and limits page.