Gampaha District (Negombo)
December
Weather in Gampaha District for December 2025
Your guide to Gampaha District weather in December - trends and predictions
Until now, December 2025 in Gampaha District has been nearly identical to the historical average, with a temperature of 28.5 °C (showing only a slight deviation of -0.4 °C).
The forecast for the next days in Gampaha District predicts temperatures to be around 28 °C, close to the historical average.
In general, the average temperature in Gampaha District at the beginning of December is 29 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 28.3 °C by the end of December.
Gampaha District experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 116.5 mm.
Temperatures
Rain 🌧️
9
Dry days
22
Rainy days
0
Snow days
29°/24°
Temperatures
17 km/h
Avg max wind
80 %
Avg humidity
Gampaha District Weather December
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Temperatures trend during December in Gampaha District
See the weather trend as well as the moving average line
December weather in Gampaha District day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Patchy rain possible | 28° /24° | 0.5 mm | 6 | |
| 2 Dec. |  Overcast | 28° /24° | 0 mm | 7 | |
| 3 Dec. | Overcast | 29° /23° | 0 mm | 6 | |
| 4 Dec. | Patchy rain possible | 29° /23° | 3.1 mm | 6 | |
| 5 Dec. |  Moderate rain at times | 29° /23° | 4.4 mm | 6 | |
| 6 Dec. |  Cloudy | 30° /23° | 2.3 mm | 7 | |
| 7 Dec. |  Heavy rain at times | 30° /23° | 4.8 mm | 7 | |
| 8 Dec. | Moderate or heavy rain shower | 30° /23° | 4.8 mm | 7 | |
| 9 Dec. | Patchy rain possible | 29° /23° | 0.4 mm | 7 | |
| 10 Dec. | Patchy rain possible | 29° /23° | 3.5 mm | 6 | |
| 11 Dec. | Heavy rain at times | 28° /23° | 2.8 mm | 6 | |
| 12 Dec. | Moderate or heavy rain shower | 28° /23° | 11.6 mm | 6 | |
| 13 Dec. | Patchy rain possible | 29° /23° | 5.2 mm | 6 | |
| 14 Dec. | Moderate or heavy rain shower | 29° /23° | 7.7 mm | 6 | |
| 15 Dec. |  Partly cloudy | 29° /24° | 0 mm | 7 | |
| 16 Dec. | Patchy rain possible | 29° /23° | 4.3 mm | 2 | |
| 17 Dec. |  Moderate rain | 29° /24° | 5.5 mm | 2 | |
| 18 Dec. | Patchy rain possible | 30° /24° | 2 mm | 1.7 | |
| 19 Dec. | Patchy rain possible | 29° /24° | 0.4 mm | 2.6 | |
| 20 Dec. |  Sunny | 28° /23° | 0 mm | 7 | |
| 21 Dec. | Sunny | 29° /23° | 0 mm | 7 | |
| 22 Dec. | Sunny | 29° /23° | 0 mm | 7 | |
| 23 Dec. | Sunny | 29° /23° | 0 mm | 7 | |
| 24 Dec. | Sunny | 28° /23° | 0 mm | 7 | |
| 25 Dec. | Partly cloudy | 28° /23° | 0 mm | 7 | |
| 26 Dec. | Patchy rain possible | 27° /24° | 0.4 mm | 6 | |
| 27 Dec. | Partly cloudy | 27° /24° | 0 mm | 7 | |
| 28 Dec. | Partly cloudy | 27° /24° | 0 mm | 7 | |
| 29 Dec. | Moderate or heavy rain shower | 30° /23° | 5.2 mm | 7 | |
| 30 Dec. | Moderate or heavy rain shower | 30° /23° | 10.7 mm | 7 | |
| 31 Dec. | Light rain shower | 29° /24° | 7.4 mm | 6 | |
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Important Notice
Our weather forecast for Gampaha District in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Gampaha District forecast closer to your planned date for the most up-to-date weather information.
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Gampaha District in December - FAQ
What are the expected maximum and minimum temperatures in Gampaha District during December?
During December, expect a variety of temperatures with highs around 29° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Gampaha District during December?
Significant rainfall exceeding 116.5 mm is expected in Gampaha District during December, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Gampaha District during December?
The average wind speed in Gampaha District during December is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Gampaha District
Explore the daily rainfall trends and prepare for Gampaha Districts December weather 💧
Typically, Gampaha District has 22 rainy days in December with a total of 116.5 mm of rainfall.
UV exposure in Gampaha District during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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