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Weather in Dehiwala-Mount Lavinia for September 2025

Your guide to Dehiwala-Mount Lavinia weather in September - trends and predictions
  • In general, the average temperature in Dehiwala-Mount Lavinia at the beginning of September is 27.6 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 28.1 °C by the end of September.

  • Dehiwala-Mount Lavinia experiences an exceptionally high level of rainfall in September, with more than 24 rainy days on average.

  • Is September a good time to visit Dehiwala-Mount Lavinia? check out the best time to travel to Dehiwala-Mount Lavinia page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
4
Dry days
Average rainy days
26
Rainy days
Average snowy days
0
Snow days
Average temperatures
27°/25°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
85 %
Avg humidity

Dehiwala-Mount Lavinia in September average weather

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Temperatures trend during September in Dehiwala-Mount Lavinia

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
27° /24° 24.2 mm 6
2 Sept. Torrential rain shower
Torrential rain shower
27° /25° 37.1 mm 6
3 Sept. Torrential rain shower
Torrential rain shower
27° /24° 51.6 mm 6
4 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
28° /25° 26.6 mm 6
5 Sept. Torrential rain shower
Torrential rain shower
28° /25° 39 mm 6
6 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
28° /25° 33.5 mm 6
7 Sept. Torrential rain shower
Torrential rain shower
28° /25° 36.7 mm 6
8 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
28° /25° 27.4 mm 6
9 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
28° /25° 36.7 mm 6
10 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
27° /25° 27.6 mm 6
11 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
27° /25° 32.4 mm 6
12 Sept. Overcast
Overcast
28° /25° 3.7 mm 6
13 Sept. Overcast
Overcast
28° /25° 5.1 mm 6
14 Sept. Partly cloudy
Partly cloudy
28° /25° 8.7 mm 7
15 Sept. Cloudy
Cloudy
28° /26° 7.7 mm 6
16 Sept. Patchy rain possible
Patchy rain possible
29° /25° 10.9 mm 6
17 Sept. Light rain shower
Light rain shower
29° /25° 12.6 mm 6
18 Sept. Light rain shower
Light rain shower
28° /25° 11.2 mm 6
19 Sept. Light rain shower
Light rain shower
28° /25° 10.1 mm 6
20 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
27° /25° 25.6 mm 6
21 Sept. Light rain shower
Light rain shower
28° /24° 9.2 mm 6
22 Sept. Patchy rain possible
Patchy rain possible
28° /25° 9.4 mm 6
23 Sept. Light rain shower
Light rain shower
28° /25° 9.1 mm 6
24 Sept. Patchy rain possible
Patchy rain possible
28° /25° 16.5 mm 6
25 Sept. Light rain shower
Light rain shower
28° /25° 17.2 mm 6
26 Sept. Light rain shower
Light rain shower
28° /25° 15.3 mm 6
27 Sept. Light rain shower
Light rain shower
28° /25° 22.7 mm 6
28 Sept. Light rain shower
Light rain shower
28° /25° 15.2 mm 6
29 Sept. Light rain shower
Light rain shower
29° /25° 15 mm 7
30 Sept. Light rain shower
Light rain shower
28° /25° 13.1 mm 6
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Important Notice
Our weather forecast for Dehiwala-Mount Lavinia in September 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 Dehiwala-Mount Lavinia forecast closer to your planned date for the most up-to-date weather information.

Dehiwala-Mount Lavinia in September - FAQ

What are the expected maximum and minimum temperatures in Dehiwala-Mount Lavinia during September?
During September, expect a variety of temperatures with highs around 27° and lows near 25°, suitable for diverse activities and preferences.
How much rainfall should be expected in Dehiwala-Mount Lavinia during September?
Significant rainfall exceeding 804.9 mm is expected in Dehiwala-Mount Lavinia during September, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Dehiwala-Mount Lavinia during September?
The average wind speed in Dehiwala-Mount Lavinia during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Dehiwala-Mount Lavinia in September?

As you prepare for your trip to Dehiwala-Mount Lavinia in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Dehiwala-Mount Lavinia, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips

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Location coordinates Where is Dehiwala-Mount Lavinia?

Get accurate weather forecasts for Dehiwala-Mount Lavinia, located at latitude 6.84 and longitude 79.871. Stay updated with localized weather information tailored for Dehiwala-Mount Lavinia.

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