Climate averages 1991–2020
Kalmunai weather
in April.
A hot, moderately wet month: the 6th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a hot month in Kalmunai: daytime highs average 30.8°C and nights cool to about 25.8°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 70 mm of rain on roughly 13 days, which makes April a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average April day.
The nearest other city in this atlas is Batticaloa (37 km away). In April its highs average 31.8°C, 1.0°C warmer than Kalmunai, with 59 mm of rain.
Among the 12 cities listed in Sri Lanka, Kalmunai ranks joint 6th of 12 for the warmest April highs and 5th of 12 for the driest April (rainfall, lowest first). The mean April high of those 12 cities is 30.7°C; Kalmunai is 0.1°C warmer than that mean.
From April to May, average highs rise by 1.5°C to 32.3°C, and monthly rainfall falls from 70 mm to 59 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Batticaloa in AprilSri Lanka · 37 kmHigh 31.8°C · Low 25.3°C · 59 mm rain
- Kandy in AprilSri Lanka · 133 kmHigh 29.1°C · Low 21.5°C · 171 mm rain
- Trincomalee in AprilSri Lanka · 146 kmHigh 31.7°C · Low 26.2°C · 56 mm rain
- Ambalantota in AprilSri Lanka · 169 kmHigh 31.3°C · Low 25.2°C · 110 mm rain
- Matara in AprilSri Lanka · 217 kmHigh 29.9°C · Low 25.2°C · 182 mm rain
- Negombo in AprilSri Lanka · 222 kmHigh 30.7°C · Low 25.5°C · 163 mm rain
- Colombo in AprilSri Lanka · 225 kmHigh 30.8°C · Low 25.0°C · 167 mm rain
- Dehiwala-Mount Lavinia in AprilSri Lanka · 226 kmHigh 30.4°C · Low 25.0°C · 174 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.