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Gampaha District (Negombo)
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Weather in Gampaha District for December 2025

Your guide to Gampaha District weather in December - trends and predictions

    Temperatures

  • In general, the average temperature in Gampaha District at the beginning of December is 28.9 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 29.3 °C by the end of December.

    • Rain 🌧️

  • Gampaha District experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 116.5 mm.

Average dry days
9
Dry days
Average rainy days
22
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/24°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Gampaha District Weather December

Move between months or click on a day
November
January
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
28°
2
Overcast
28°
3
Overcast
29°
4
Patchy rain possible
29°
5
Moderate rain at times
29°
6
Cloudy
30°
7
Heavy rain at times
29°
8
Moderate or heavy rain shower
30°
9
Patchy rain possible
30°
10
Patchy rain possible
29°
11
Heavy rain at times
28°
12
Moderate or heavy rain shower
28°
13
Patchy rain possible
29°
14
Moderate or heavy rain shower
28°
15
Partly cloudy
29°
16
Moderate rain at times
28°
17
Moderate or heavy rain shower
28°
18
Moderate rain at times
28°
19
Moderate rain at times
28°
20
Heavy rain at times
29°
21
Moderate rain at times
29°
22
Moderate rain at times
29°
23
Sunny
29°
24
Sunny
28°
25
Sunny
29°
26
Sunny
29°
27
Moderate or heavy rain shower
29°
28
Patchy rain possible
29°
29
Moderate or heavy rain shower
30°
30
Moderate or heavy rain shower
30°
31
Light rain shower
29°

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

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
1 Dec. Patchy rain possible
Patchy rain possible
 28° /25° 0.6 mm 6
2 Dec. Overcast
Overcast
 28° /25° 0 mm 6
3 Dec. Overcast
Overcast
 29° /24° 0 mm 6
4 Dec. Patchy rain possible
Patchy rain possible
 29° /23° 0.1 mm 6
5 Dec. Moderate rain at times
Moderate rain at times
 29° /24° 3.8 mm 6
6 Dec. Cloudy
Cloudy
 30° /24° 0 mm 7
7 Dec. Heavy rain at times
Heavy rain at times
 29° /23° 2.2 mm 6
8 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /24° 6.2 mm 6
9 Dec. Patchy rain possible
Patchy rain possible
 30° /23° 0.5 mm 7
10 Dec. Patchy rain possible
Patchy rain possible
 29° /23° 0.3 mm 6
11 Dec. Heavy rain at times
Heavy rain at times
 28° /24° 2.7 mm 6
12 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 28° /24° 14.4 mm 6
13 Dec. Patchy rain possible
Patchy rain possible
 29° /24° 7.9 mm 6
14 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 28° /24° 14.5 mm 6
15 Dec. Partly cloudy
Partly cloudy
 29° /24° 0 mm 7
16 Dec. Moderate rain at times
Moderate rain at times
 28° /23° 2.5 mm 6
17 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 28° /23° 9.9 mm 6
18 Dec. Moderate rain at times
Moderate rain at times
 28° /24° 1.3 mm 6
19 Dec. Moderate rain at times
Moderate rain at times
 28° /24° 1.9 mm 6
20 Dec. Heavy rain at times
Heavy rain at times
 29° /25° 6.5 mm 6
21 Dec. Moderate rain at times
Moderate rain at times
 29° /24° 4.5 mm 6
22 Dec. Moderate rain at times
Moderate rain at times
 29° /24° 2.5 mm 6
23 Dec. Sunny
Sunny
 29° /24° 0 mm 7
24 Dec. Sunny
Sunny
 28° /23° 0 mm 7
25 Dec. Sunny
Sunny
 29° /23° 0 mm 7
26 Dec. Sunny
Sunny
 29° /22° 0 mm 7
27 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /23° 10.1 mm 6
28 Dec. Patchy rain possible
Patchy rain possible
 29° /23° 0.8 mm 6
29 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /23° 5.2 mm 7
30 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /23° 10.7 mm 7
31 Dec. Light rain shower
Light rain shower
 29° /24° 7.4 mm 6
Next
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 💧

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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Location coordinates Where is Gampaha District?

Get accurate weather forecasts for Gampaha District, located at latitude 7.208 and longitude 79.836. Stay updated with localized weather information tailored for Gampaha District.

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