Climate and monthly weather forecastChilaw, Sri Lanka
Climate and monthly weather forecast
Weather in January
January in Chilaw, Sri Lanka, is a tropical winter month, with an average temperature fluctuating between 22.8°C (73°F) and 30.8°C (87.4°F). During January, the average high-temperature is a tropical 30.8°C (87.4°F), maintaining a close resemblance to that of the preceding month. Weather in January »Weather in February
The last month of the winter, February, is another tropical month in Chilaw, Sri Lanka, with an average temperature varying between 31.7°C (89.1°F) and 23.1°C (73.6°F). February's onset sees an average high-temperature of a still hot 31.7°C (89.1°F), exhibiting a slight fluctuation from the previous month. Weather in February »Weather in March
March, the first month of the spring in Chilaw, is still a hot month, with temperature in the range of an average low of 24.5°C (76.1°F) and an average high of 32.1°C (89.8°F). In Chilaw, Sri Lanka, temperatures reach their average annual highs in March, measuring 32.1°C (89.8°F) and a minimum average of 24.5°C (76.1°F). For March, the heat index is appraised at a scorching 43°C (109.4°F). Weather in March »Weather in April
April, like March, is a hot spring month in Chilaw, Sri Lanka, with an average temperature fluctuating between 32°C (89.6°F) and 26°C (78.8°F). The advent of April sees the average high-temperature at a still hot 32°C (89.6°F), subtly shifted from March's 32.1°C (89.8°F). Weather in April »Weather in May
May, the last month of the spring in Chilaw, is also a hot month, with temperature in the range of an average high of 30.8°C (87.4°F) and an average low of 26.4°C (79.5°F). Chilaw's average high-temperature in May sits at a still hot 30.8°C (87.4°F), showing little difference from the previous month. Weather in May »Weather in June
June, the first month of the summer in Chilaw, is also a moderately hot month, with temperature in the range of an average low of 25.9°C (78.6°F) and an average high of 29.6°C (85.3°F). The shift into June finds Chilaw at an average high-temperature of a warm 29.6°C (85.3°F), closely comparable to May's conditions. Weather in June »Weather in July
July, the same as June, is another warm summer month in Chilaw, Sri Lanka, with temperature in the range of an average high of 29.2°C (84.6°F) and an average low of 25.5°C (77.9°F). Chilaw's July weather reaches an average high of 29.2°C (84.6°F) and an average low of 25.5°C (77.9°F), making it the coldest month. The heat index in July is appraised at a sweltering 36°C (96.8°F). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Chilaw, Sri Lanka, with an average temperature fluctuating between 29.3°C (84.7°F) and 25.4°C (77.7°F). Chilaw experiences a minor change to a still moderately hot 29.3°C (84.7°F) in average high-temperature during August, closely reflecting July. Weather in August »Weather in September
September, the first month of the autumn in Chilaw, is still a warm month, with an average temperature fluctuating between 29.5°C (85.1°F) and 25.2°C (77.4°F). The advent of September reveals an average high-temperature of a still warm 29.5°C (85.1°F), showing minimal difference from the prior month. Weather in September »Weather in October
October, like September, in Chilaw, Sri Lanka, is a moderately hot autumn month, with an average temperature varying between 29.9°C (85.8°F) and 25.1°C (77.2°F). October is marked by an average high-temperature of a still warm 29.9°C (85.8°F), almost identical to the preceding month. Weather in October »Weather in November
November, the last month of the autumn in Chilaw, is a hot month, with an average temperature ranging between min 24.5°C (76.1°F) and max 30.2°C (86.4°F). November's arrival shows an average high-temperature of a hot 30.2°C (86.4°F), hardly different from the previous month. Weather in November »Weather in December
December, the first month of the winter in Chilaw, is also a moderately hot month, with an average temperature ranging between max 29.9°C (85.8°F) and min 23.7°C (74.7°F). Chilaw's weather in December displays an average high-temperature of a warm 29.9°C (85.8°F), showing minor disparity from November's 30.2°C (86.4°F). Weather in December »Updated: Feb 6, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The months with the lowest humidity are January and February, with an average relative humidity of 73%.
The month with the least rainfall in Chilaw is January, when the rain falls for 9.7 days and typically collects 29mm (1.14") of precipitation.
Throughout the year, in Chilaw, there are 265.4 rainfall days, and 1744mm (68.66") of precipitation is accumulated.
The months with the most sunshine in Chilaw are January through April, with an average of 9.2h of sunshine.
The months with the highest UV index in Chilaw are January through April, July, September, November and December, with an average maximum UV index of 7.
Chilaw, Sri Lanka, experiences its average highest temperatures in March, reaching a peak of 32.1°C (89.8°F) and a minimum of 24.5°C (76.1°F).
April is the month with the warmest seawater in Chilaw, with an average sea temperature of 29.6°C (85.3°F).
May, June, August and October, with an average maximum UV index of 6, are months with the lowest UV index.
June through August, with an average relative humidity of 82%, are most humid months.
June is the month with the most rainfall. Rain falls for 27.6 days and accumulates 231mm (9.09") of precipitation.
June has the longest days of the year, with an average of 12h and 36min of daylight.
July is the month when Chilaw, Sri Lanka, sees the average lowest temperatures, with a high of 29.2°C (84.6°F) and a low of 25.5°C (77.9°F).
August is the month with the coldest seawater in Chilaw, with an average sea temperature of 27°C (80.6°F).
With an average of 6.6h of sunshine, November has the least sunshine of the year in Chilaw, Sri Lanka.
With an average of 11h and 42min of daylight, December has the shortest days of the year in Chilaw.
Chilaw, Sri Lanka, does not observe Daylight Saving Time (DST). +0530 timezone is used over the entire year.
Average temperature
Chilaw, Sri Lanka
The warmest month (with the highest average high temperature) is March (32.1°C).
The month with the lowest average high temperature is July (29.2°C).
The month with the highest average low temperature is May (26.4°C).
The coldest month (with the lowest average low temperature) is January (22.8°C).
Average pressure
Chilaw, Sri Lanka
- Average pressure in January:
1011.7mbar - Average pressure in February:
1011.3mbar - Average pressure in March:
1010.7mbar - Average pressure in April:
1009.6mbar - Average pressure in May:
1008.4mbar - Average pressure in June:
1008.4mbar
- Average pressure in July:
1008.5mbar - Average pressure in August:
1008.8mbar - Average pressure in September:
1009.6mbar - Average pressure in October:
1009.9mbar - Average pressure in November:
1009.8mbar - Average pressure in December:
1010.5mbar
The month with the highest atmospheric pressure is January (1011.7mbar).
The months with the lowest atmospheric pressure are May and June (1008.4mbar).
Average wind speed
Chilaw, Sri Lanka
- Average wind speed in January:
16.2km/h - Average wind speed in February:
12.9km/h - Average wind speed in March:
9.1km/h - Average wind speed in April:
10km/h - Average wind speed in May:
15.5km/h - Average wind speed in June:
18.3km/h
- Average wind speed in July:
17.1km/h - Average wind speed in August:
17km/h - Average wind speed in September:
16km/h - Average wind speed in October:
11.8km/h - Average wind speed in November:
10.3km/h - Average wind speed in December:
14.1km/h
The windiest month (with the highest average wind speed) is June (18.3km/h).
The calmest month (with the lowest average wind speed) is March (9.1km/h).
Average humidity
Chilaw, Sri Lanka
The months with the highest relative humidity are June, July and August (82%).
The months with the lowest relative humidity are January and February (73%).
Average rainfall
Chilaw, Sri Lanka
- Average rainfall in January:
29mm - Average rainfall in February:
36mm - Average rainfall in March:
55mm - Average rainfall in April:
112mm - Average rainfall in May:
204mm - Average rainfall in June:
231mm
- Average rainfall in July:
177mm - Average rainfall in August:
210mm - Average rainfall in September:
153mm - Average rainfall in October:
224mm - Average rainfall in November:
174mm - Average rainfall in December:
139mm
The wettest month (with the highest rainfall) is June (231mm).
The driest month (with the least rainfall) is January (29mm).
Average rainfall days
Chilaw, Sri Lanka
- Average rainfall days in January:
9.7 days - Average rainfall days in February:
10.2 days - Average rainfall days in March:
18.2 days - Average rainfall days in April:
23.4 days - Average rainfall days in May:
26.3 days - Average rainfall days in June:
27.6 days
- Average rainfall days in July:
27.7 days - Average rainfall days in August:
28.4 days - Average rainfall days in September:
24.4 days - Average rainfall days in October:
25.9 days - Average rainfall days in November:
23.3 days - Average rainfall days in December:
20.3 days
The month with the highest number of rainy days is August (28.4 days).
The month with the least rainy days is January (9.7 days).
Average sea temperature
Chilaw, Sri Lanka
The best month for swimming (with the highest average sea temperature) is April (29.6°C).
The coldest month (with the lowest average sea temperature) is August (27°C).
Average daylight / Average sunshine
Chilaw, Sri Lanka
- Average daylight in January:
11h and 42min - Average daylight in February:
11h and 54min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 18min - Average daylight in May:
12h and 30min - Average daylight in June:
12h and 36min
- Average daylight in July:
12h and 30min - Average daylight in August:
12h and 24min - Average daylight in September:
12h and 12min - Average daylight in October:
12h and 0min - Average daylight in November:
11h and 48min - Average daylight in December:
11h and 42min
The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in January:
9h and 12min - Average sunshine in February:
9h and 12min - Average sunshine in March:
9h and 12min - Average sunshine in April:
9h and 12min - Average sunshine in May:
8h and 48min - Average sunshine in June:
8h and 12min
- Average sunshine in July:
8h and 0min - Average sunshine in August:
7h and 30min - Average sunshine in September:
7h and 42min - Average sunshine in October:
7h and 48min - Average sunshine in November:
6h and 36min - Average sunshine in December:
7h and 0min
The months with the most sunshine are January, February, March and April (Average sunshine: 9h and 12min).
The month with the least sunshine is November (Average sunshine: 6h and 36min).
Average sunshine days
Chilaw, Sri Lanka
- Average sunshine days in January:
20 days - Average sunshine days in February:
16.5 days - Average sunshine days in March:
10.4 days - Average sunshine days in April:
4.6 days - Average sunshine days in May:
3.6 days - Average sunshine days in June:
1.7 days
- Average sunshine days in July:
2.1 days - Average sunshine days in August:
1.2 days - Average sunshine days in September:
3 days - Average sunshine days in October:
3.3 days - Average sunshine days in November:
6.3 days - Average sunshine days in December:
9.5 days
The month with the most sunshine days is January (20 days).
The month with the least sunshine days is August (1.2 days).
Average UV index
Chilaw, Sri Lanka
The months with the highest UV index are January, February, March, April, July, September, November and December (UV index 7).
The months with the lowest UV index are May, June, August and October (UV index 6).
Average cloud cover
Chilaw, Sri Lanka
The month with the most cloud cover is June (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 21).
Average visibility
Chilaw, Sri Lanka
The months with the highest visibility are January, February, March, April, June, July, September and December (10km).
The months with the lowest visibility are May, August, October and November (9km).
