Climate averages 1991–2020
Negombo weather
in July.
A hot, wet month: the 11th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Negombo: daytime highs average 28.5°C and nights cool to about 25.2°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 176 mm of rain on roughly 25 days, which makes July a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average July day.
The nearest other city in this atlas is Colombo (30 km away). In July its highs average 28.5°C, about as warm as Negombo, with 183 mm of rain.
Among the 12 cities listed in Sri Lanka, Negombo ranks joint 7th of 12 for the warmest July highs and 9th of 12 for the driest July (rainfall, lowest first). The mean July high of those 12 cities is 30.2°C; Negombo is 1.7°C cooler than that mean.
From July to August, average highs fall by 0.1°C to 28.4°C, and monthly rainfall falls from 176 mm to 165 mm.
The annual picture
July 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
Negombo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.2°C23.2°C | 23.2°C | 38 | 6.2 | 11.812 h |
| February | 31.8°C23.7°C | 23.7°C | 40 | 6.5 | 11.912 h |
| March | 31.8°C24.8°C | 24.8°C | 76 | 15.8 | 12.112 h |
| April | 30.7°C25.5°C | 25.5°C | 163 | 26.0 | 12.312 h |
| May | 29.6°C25.7°C | 25.7°C | 255 | 28.6 | 12.412 h |
| June | 28.8°C25.4°C | 25.4°C | 224 | 27.0 | 12.513 h |
| July, selected | 28.5°C25.2°C | 25.2°C | 176 | 24.5 | 12.512 h |
| August | 28.4°C25.0°C | 25.0°C | 165 | 23.9 | 12.412 h |
| September | 28.6°C24.9°C | 24.9°C | 215 | 25.3 | 12.212 h |
| October | 28.8°C24.5°C | 24.5°C | 315 | 26.4 | 12.012 h |
| November | 29.0°C24.0°C | 24.0°C | 271 | 22.3 | 11.812 h |
| December | 29.1°C23.5°C | 23.5°C | 137 | 14.1 | 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
July in nearby cities
- Colombo in JulySri Lanka · 30 kmHigh 28.5°C · Low 24.8°C · 183 mm rain
- Dehiwala-Mount Lavinia in JulySri Lanka · 41 kmHigh 28.2°C · Low 24.8°C · 205 mm rain
- Kandy in JulySri Lanka · 88 kmHigh 26.7°C · Low 21.3°C · 83 mm rain
- Galle in JulySri Lanka · 136 kmHigh 27.8°C · Low 24.9°C · 214 mm rain
- Matara in JulySri Lanka · 160 kmHigh 28.3°C · Low 24.8°C · 159 mm rain
- Ambalantota in JulySri Lanka · 178 kmHigh 31.2°C · Low 25.6°C · 45 mm rain
- Batticaloa in JulySri Lanka · 212 kmHigh 34.5°C · Low 26.5°C · 24 mm rain
- Trincomalee in JulySri Lanka · 216 kmHigh 33.6°C · Low 26.3°C · 31 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 Negombo) is explained once on the Negombo year overview and on the Sources, method and limits page.