Weather in Negombo: December
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Average day temperature: | 86.7°F |
| Average night temperature: | 75.7°F | |
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Sea water temperature: | 83.3°F |
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Number of sunny days: | 11 days |
| Day length: | 11.7 - 11.8 hours | |
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Number of rainy days: | 9 days |
| Precipitation totals: | 5.4 in. | |
| more information | ||
14 days
forecast
forecast
| Negombo |
sea water
temperature
temperature
| Negombo |
Air temperature in December, °F
Show year:
2025
2024
2023
The highest day temperature during December of 2025 was 85°F. At the same time the lowest night temperature was 73°F. Daily and nightly averages during December were 83.0°F and 75.3°F.
Sea water temperature in Negombo in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 82.2°F. The highest and lowest sea temperatures during the month were 82.9°F and 81.3°F.
Sunny, partly cloudy and cloudy days
Mostly all days in December are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Negombo in December is 4.9 in.
Wind speed in December, mph
The average wind speed value in December is 9.5 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 6.4.
Best time for vacation in Negombo
Negombo on a weather map
Places in Sri Lanka:
Name
°F
24 Hours Forecast
Negombo
Local time: 11:12
December 30, tuesday
1200
82°F
SE
17 mph
17 mph
1500
81°F
S
17 mph
17 mph
1800
79°F
S
14 mph
14 mph
2100
79°F
S
12 mph
12 mph
December 31, wednesday
0000
77°F
SW
11 mph
11 mph
0300
75°F
SW
11 mph
11 mph
0600
75°F
SW
9 mph
9 mph
0900
81°F
S
9 mph
9 mph
