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Mount Lavinia-Dehiwala weather by month
Check out Mount Lavinia-Dehiwala weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.
Temperature in Mount Lavinia-Dehiwala (°C)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max temperature (daytime) | 31 |
31 |
32 |
32 |
31 |
30 |
30 |
30 |
30 |
30 |
30 |
30 |
| Min temperature (night-time) | 22 |
23 |
24 |
24 |
25 |
25 |
25 |
25 |
25 |
24 |
23 |
22 |
| Heat & Humidity | H |
H |
VH |
VH |
VH |
H |
H |
H |
H |
H |
H |
H |
| Sea temperature | 28 |
28 |
29 |
30 |
29 |
28 |
27 |
27 |
28 |
28 |
28 |
28 |
Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme
Sunshine & Daylight in Mount Lavinia-Dehiwala
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daily hours of sunshine | ||||||||||||
| Daily hours of daylight | 12 |
12 |
12 |
12 |
12 |
13 |
12 |
12 |
12 |
12 |
12 |
12 |
| UV Index (Maximum) | 11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
Rainfall in Mount Lavinia-Dehiwala
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of days with some rain | 5 |
5 |
9 |
14 |
14 |
15 |
11 |
11 |
14 |
16 |
15 |
10 |
| Average monthly rainfall (mm) | 55 |
74 |
136 |
250 |
382 |
186 |
124 |
116 |
236 |
371 |
306 |
166 |
More about Mount Lavinia-Dehiwala
Mount Lavinia-Dehiwala by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Sri Lanka
Expires at 23:59 on Tuesday 2nd Dec 2025 · View all TUI offers
The climate guide for Sri Lanka (Mount Lavinia-Dehiwala) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
What's the climate like in Mount Lavinia-Dehiwala?
Mount Lavinia-Dehiwala has a hot tropical climate with no dry season.
Mount Lavinia-Dehiwala weather in January
Expect daytime maximum temperatures of 31°C in Mount Lavinia-Dehiwala, Sri Lanka in January and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 55 mm of rainfall in the month.
- 31°C max day temperature
31 - 8 hours of sunshine per day
- 5 days with some rainfall
5 - 22°C min night temperature
22 - 12 hours of daylight per day
12 - High heat & humidity
H - 55 mm of monthly rainfall
55 - 11 (Extreme) UV index
11 - 28°C sea temperature
28
Mount Lavinia-Dehiwala weather in February
Expect daytime maximum temperatures of 31°C in Mount Lavinia-Dehiwala, Sri Lanka in February and high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 74 mm of rainfall in the month.
- 31°C max day temperature
31 - 9 hours of sunshine per day
- 5 days with some rainfall
5 - 23°C min night temperature
23 - 12 hours of daylight per day
12 - High heat & humidity
H - 74 mm of monthly rainfall
74 - 11+ (Extreme) UV index
11 - 28°C sea temperature
28
Mount Lavinia-Dehiwala weather in March
Expect daytime maximum temperatures of 32°C in Mount Lavinia-Dehiwala, Sri Lanka in March and very high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 136 mm of rainfall in the month.
- 32°C max day temperature
32 - 9 hours of sunshine per day
- 9 days with some rainfall
9 - 24°C min night temperature
24 - 12 hours of daylight per day
12 - Very High heat & humidity
VH - 136 mm of monthly rainfall
136 - 11+ (Extreme) UV index
11 - 29°C sea temperature
29
Mount Lavinia-Dehiwala weather in April
Expect daytime maximum temperatures of 32°C in Mount Lavinia-Dehiwala, Sri Lanka in April and very high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 14 days with some rainfall and typically 250 mm of rainfall in the month.
- 32°C max day temperature
32 - 8 hours of sunshine per day
- 14 days with some rainfall
14 - 24°C min night temperature
24 - 12 hours of daylight per day
12 - Very High heat & humidity
VH - 250 mm of monthly rainfall
250 - 11+ (Extreme) UV index
11 - 30°C sea temperature
30
Mount Lavinia-Dehiwala weather in May
Expect daytime maximum temperatures of 31°C in Mount Lavinia-Dehiwala, Sri Lanka in May and very high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 14 days with some rainfall and typically 382 mm of rainfall in the month.
- 31°C max day temperature
31 - 6 hours of sunshine per day
- 14 days with some rainfall
14 - 25°C min night temperature
25 - 12 hours of daylight per day
12 - Very High heat & humidity
VH - 382 mm of monthly rainfall
382 - 11+ (Extreme) UV index
11 - 29°C sea temperature
29
Mount Lavinia-Dehiwala weather in June
Expect daytime maximum temperatures of 30°C in Mount Lavinia-Dehiwala, Sri Lanka in June and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 15 days with some rainfall and typically 186 mm of rainfall in the month.
- 30°C max day temperature
30 - 6 hours of sunshine per day
- 15 days with some rainfall
15 - 25°C min night temperature
25 - 13 hours of daylight per day
13 - High heat & humidity
H - 186 mm of monthly rainfall
186 - 11+ (Extreme) UV index
11 - 28°C sea temperature
28
Mount Lavinia-Dehiwala weather in July
Expect daytime maximum temperatures of 30°C in Mount Lavinia-Dehiwala, Sri Lanka in July and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 124 mm of rainfall in the month.
- 30°C max day temperature
30 - 6 hours of sunshine per day
- 11 days with some rainfall
11 - 25°C min night temperature
25 - 12 hours of daylight per day
12 - High heat & humidity
H - 124 mm of monthly rainfall
124 - 11+ (Extreme) UV index
11 - 27°C sea temperature
27
Mount Lavinia-Dehiwala weather in August
Expect daytime maximum temperatures of 30°C in Mount Lavinia-Dehiwala, Sri Lanka in August and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 116 mm of rainfall in the month.
- 30°C max day temperature
30 - 6 hours of sunshine per day
- 11 days with some rainfall
11 - 25°C min night temperature
25 - 12 hours of daylight per day
12 - High heat & humidity
H - 116 mm of monthly rainfall
116 - 11+ (Extreme) UV index
11 - 27°C sea temperature
27
Mount Lavinia-Dehiwala weather in September
Expect daytime maximum temperatures of 30°C in Mount Lavinia-Dehiwala, Sri Lanka in September and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 14 days with some rainfall and typically 236 mm of rainfall in the month.
- 30°C max day temperature
30 - 6 hours of sunshine per day
- 14 days with some rainfall
14 - 25°C min night temperature
25 - 12 hours of daylight per day
12 - High heat & humidity
H - 236 mm of monthly rainfall
236 - 11+ (Extreme) UV index
11 - 28°C sea temperature
28
Mount Lavinia-Dehiwala weather in October
Expect daytime maximum temperatures of 30°C in Mount Lavinia-Dehiwala, Sri Lanka in October and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 16 days with some rainfall and typically 371 mm of rainfall in the month.
- 30°C max day temperature
30 - 6 hours of sunshine per day
- 16 days with some rainfall
16 - 24°C min night temperature
24 - 12 hours of daylight per day
12 - High heat & humidity
H - 371 mm of monthly rainfall
371 - 11+ (Extreme) UV index
11 - 28°C sea temperature
28
Mount Lavinia-Dehiwala weather in November
Expect daytime maximum temperatures of 30°C in Mount Lavinia-Dehiwala, Sri Lanka in November and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 15 days with some rainfall and typically 306 mm of rainfall in the month.
- 30°C max day temperature
30 - 7 hours of sunshine per day
- 15 days with some rainfall
15 - 23°C min night temperature
23 - 12 hours of daylight per day
12 - High heat & humidity
H - 306 mm of monthly rainfall
306 - 11 (Extreme) UV index
11 - 28°C sea temperature
28
Mount Lavinia-Dehiwala weather in December
Expect daytime maximum temperatures of 30°C in Mount Lavinia-Dehiwala, Sri Lanka in December and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 166 mm of rainfall in the month.
- 30°C max day temperature
30 - 7 hours of sunshine per day
- 10 days with some rainfall
10 - 22°C min night temperature
22 - 12 hours of daylight per day
12 - High heat & humidity
H - 166 mm of monthly rainfall
166 - 11 (Extreme) UV index
11 - 28°C sea temperature
28
More about Mount Lavinia-Dehiwala
Mount Lavinia-Dehiwala by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Sri Lanka
- Save up to £300 on holidays (Jan 2026-Nov 2027)
- Book online with TUI Black Friday discount code
- Sign up to myTUI. Discount varies by spend. T&Cs apply
Expires at 23:59 on Tuesday 2nd Dec 2025 · View all TUI offers
The climate guide for Sri Lanka (Mount Lavinia-Dehiwala) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about Sri Lanka
Compare Mount Lavinia-Dehiwala with the UK
Below the Mount Lavinia-Dehiwala chart shows average maximum daytime temperature for Mount Lavinia-Dehiwala, Sri Lanka and the UK (London).
Maximum daytime temperature (°C)
Metric (°C / mm) | Imperial (°F / inches)
Compare more Mount Lavinia-Dehiwala weather >>
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