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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Climate and monthly weather forecast
Weather in January
January, the same as December, is another warm winter month in Sirimalwatta, Sri Lanka, with temperature in the range of an average high of 28.3°C (82.9°F) and an average low of 18.2°C (64.8°F). January's arrival brings an average high-temperature of a still moderately hot 28.3°C (82.9°F), demonstrating subtle variation from the preceding month. Weather in January »
Weather in February
February, the last month of the winter in Sirimalwatta, is another warm month, with an average temperature varying between 18.1°C (64.6°F) and 29.7°C (85.5°F). In February, Sirimalwatta experiences a minor shift in meteorological conditions with average high-temperatures marked at a still moderately hot 29.7°C (85.5°F), closely mirroring the climate in January. Weather in February »
Weather in March
March, the first month of the spring in Sirimalwatta, is a hot month, with temperature in the range of an average high of 31.5°C (88.7°F) and an average low of 19.2°C (66.6°F). Sirimalwatta reaches its highest average temperatures in March, measuring 31.5°C (88.7°F) at the peak and 19.2°C (66.6°F) at the lowest. The heat index value during March is evaluated at a blistering 40°C (104°F). Weather in March »
Weather in April
April, the same as March, in Sirimalwatta, Sri Lanka, is another hot spring month, with an average temperature ranging between max 31.2°C (88.2°F) and min 20.8°C (69.4°F). April's presence marks an average high-temperature of a still tropical 31.2°C (88.2°F), subtly varied from March's 31.5°C (88.7°F). Weather in April »
Weather in May
May, the last month of the spring in Sirimalwatta, is also a hot month, with temperature in the range of an average high of 30.1°C (86.2°F) and an average low of 21.8°C (71.2°F). As May takes its course, Sirimalwatta's average high-temperature registers at a still hot 30.1°C (86.2°F), closely aligning with the preceding month. Weather in May »
Weather in June
June, the first month of the summer in Sirimalwatta, is also a moderately hot month, with an average temperature fluctuating between 29.3°C (84.7°F) and 21.8°C (71.2°F). Sirimalwatta's June average high-temperature settles at a moderately hot 29.3°C (84.7°F), showing a near match with the preceding month. Weather in June »
Weather in July
July, like June, in Sirimalwatta, Sri Lanka, is another warm summer month, with an average temperature varying between 21.4°C (70.5°F) and 29.3°C (84.7°F). Entering July, the average high-temperature is recorded at a still warm 29.3°C (84.7°F), maintaining parity with June. Weather in July »
Weather in August
August, the last month of the summer in Sirimalwatta, is another warm month, with an average temperature varying between 29.2°C (84.6°F) and 21.2°C (70.2°F). The ushering in of August brings an average high-temperature of a still warm 29.2°C (84.6°F), closely mirroring the 29.3°C (84.7°F) of July. Weather in August »
Weather in September
September, the first month of the autumn in Sirimalwatta, is also a moderately hot month, with an average temperature ranging between max 29.5°C (85.1°F) and min 21.1°C (70°F). The advent of September presents an average high-temperature of a still moderately hot 29.5°C (85.1°F), maintaining a close correlation with the preceding month. Weather in September »
Weather in October
October, like September, in Sirimalwatta, Sri Lanka, is a moderately hot autumn month, with temperature in the range of an average low of 20.7°C (69.3°F) and an average high of 29.4°C (84.9°F). With the onset of October, a modest change to a still moderately hot 29.4°C (84.9°F) from September's 29.5°C (85.1°F) is noted in high-temperature. Weather in October »
Weather in November
November, the last month of the autumn in Sirimalwatta, is also a moderately hot month, with temperature in the range of an average high of 28.3°C (82.9°F) and an average low of 20.1°C (68.2°F). As November unfolds, the average high-temperature reaches a still moderately hot 28.3°C (82.9°F), hinting at a slight fluctuation from the previous month. Weather in November »
Weather in December
The first month of the winter, December, is still a warm month in Sirimalwatta, Sri Lanka, with an average temperature fluctuating between 19.5°C (67.1°F) and 27.5°C (81.5°F). December is the month when Sirimalwatta sees the lowest average temperatures, with a high of 27.5°C (81.5°F) and a low of 19.5°C (67.1°F). December's average heat index is evaluated at a tropical 31°C (87.8°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
What is the driest month in Sirimalwatta?
The month with the least rainfall in Sirimalwatta is January, when the rain falls for 14.1 days and typically collects 38mm (1.5") of precipitation.
How much does it rain in Sirimalwatta?
In Sirimalwatta, during the entire year, the rain falls for 278.4 days and collects up to 1466mm (57.72") of precipitation.
What are the months with the highest UV index in Sirimalwatta?
January through September, November and December, with an average maximum UV index of 6, are months with the highest UV index.
What is the hottest time of year in Sirimalwatta?
With average temperatures fluctuating between a high of 31.5°C (88.7°F) and a low of 19.2°C (66.6°F), March stands out as the warmest month in Sirimalwatta.
What is the least humid month in Sirimalwatta?
March is the least humid month, with an average relative humidity of 74%.
When are the longest days in Sirimalwatta?
The month with the longest days is June, with an average of 12h and 30min of daylight.
What month has the most sunshine in Sirimalwatta?
The month with the most sunshine is June, with an average of 10.8h of sunshine.
What is the wettest month in Sirimalwatta?
October is the month with the most rainfall in Sirimalwatta, Sri Lanka. Rain falls for 27.4 days and accumulates 301mm (11.85") of precipitation.
When is the lowest UV index in Sirimalwatta?
The month with the lowest UV index in Sirimalwatta, Sri Lanka, is October, with an average maximum UV index of 5.
What is the coldest time of year in Sirimalwatta?
December proves to be the coldest month in Sirimalwatta, Sri Lanka, recording an average maximum temperature of 27.5°C (81.5°F) and a minimum temperature of 19.5°C (67.1°F).
What is the most humid month in Sirimalwatta?
With an average relative humidity of 84%, December is the most humid month.
What is the month with the shortest days in Sirimalwatta?
December has the shortest days of the year in Sirimalwatta, with an average of 11h and 42min of daylight.
Is there Daylight Saving Time (DST) in Sirimalwatta?
Sirimalwatta does not utilize Daylight Saving Time (DST). +0530 timezone is used over the entire year.
What is the month with the least sunshine in Sirimalwatta?
December has the least sunshine of the year in Sirimalwatta, with an average of 5.7h of sunshine.
Average temperature
Sirimalwatta, Sri Lanka
The warmest month (with the highest average high temperature) is March (31.5°C).
The month with the lowest average high temperature is December (27.5°C).
The months with the highest average low temperature are May and June (21.8°C).
The coldest month (with the lowest average low temperature) is February (18.1°C).
Average pressure
Sirimalwatta, Sri Lanka
- Average pressure in January:
1011.8mbar - Average pressure in February:
1011.5mbar - Average pressure in March:
1010.8mbar - Average pressure in April:
1009.6mbar - Average pressure in May:
1008.2mbar - Average pressure in June:
1008.1mbar
- Average pressure in July:
1008.2mbar - Average pressure in August:
1008.5mbar - Average pressure in September:
1009.3mbar - Average pressure in October:
1009.7mbar - Average pressure in November:
1009.8mbar - Average pressure in December:
1010.5mbar
The month with the highest atmospheric pressure is January (1011.8mbar).
The month with the lowest atmospheric pressure is June (1008.1mbar).
Average wind speed
Sirimalwatta, Sri Lanka
- Average wind speed in January:
7.7km/h - Average wind speed in February:
7.1km/h - Average wind speed in March:
5km/h - Average wind speed in April:
4.7km/h - Average wind speed in May:
9.3km/h - Average wind speed in June:
13.5km/h
- Average wind speed in July:
12.6km/h - Average wind speed in August:
11.6km/h - Average wind speed in September:
10.8km/h - Average wind speed in October:
6.8km/h - Average wind speed in November:
5.3km/h - Average wind speed in December:
6.7km/h
The windiest month (with the highest average wind speed) is June (13.5km/h).
The calmest month (with the lowest average wind speed) is April (4.7km/h).
Average humidity
Sirimalwatta, Sri Lanka
The month with the highest relative humidity is December (84%).
The month with the lowest relative humidity is March (74%).
Average rainfall
Sirimalwatta, Sri Lanka
- Average rainfall in January:
38mm - Average rainfall in February:
59mm - Average rainfall in March:
72mm - Average rainfall in April:
152mm - Average rainfall in May:
163mm - Average rainfall in June:
57mm
The wettest month (with the highest rainfall) is October (301mm).
The driest month (with the least rainfall) is January (38mm).
Average rainfall days
Sirimalwatta, Sri Lanka
- Average rainfall days in January:
14.1 days - Average rainfall days in February:
14.5 days - Average rainfall days in March:
18.9 days - Average rainfall days in April:
27 days - Average rainfall days in May:
28.6 days - Average rainfall days in June:
25.1 days
- Average rainfall days in July:
24.3 days - Average rainfall days in August:
25.8 days - Average rainfall days in September:
23.4 days - Average rainfall days in October:
27.4 days - Average rainfall days in November:
26.4 days - Average rainfall days in December:
22.9 days
The month with the highest number of rainy days is May (28.6 days).
The month with the least rainy days is January (14.1 days).
Average daylight / Average sunshine
Sirimalwatta, Sri Lanka
- Average daylight in January:
11h and 5min - Average daylight in February:
11h and 5min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 2min - Average daylight in May:
12h and 3min - Average daylight in June:
12h and 3min
- Average daylight in July:
12h and 3min - Average daylight in August:
12h and 2min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 0min - Average daylight in November:
11h and 5min - Average daylight in December:
11h and 4min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in January:
8h and 3min - Average sunshine in February:
8h and 4min - Average sunshine in March:
8h and 5min - Average sunshine in April:
9h and 2min - Average sunshine in May:
10h and 2min - Average sunshine in June:
10h and 5min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
8h and 4min - Average sunshine in September:
10h and 2min - Average sunshine in October:
7h and 5min - Average sunshine in November:
6h and 5min - Average sunshine in December:
5h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days
Sirimalwatta, Sri Lanka
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
12.4 days - Average sunshine days in March:
10.3 days - Average sunshine days in April:
1.8 days - Average sunshine days in May:
1.2 days - Average sunshine days in June:
1.7 days
- Average sunshine days in July:
2.8 days - Average sunshine days in August:
2.6 days - Average sunshine days in September:
3.9 days - Average sunshine days in October:
2.3 days - Average sunshine days in November:
3 days - Average sunshine days in December:
6.8 days
The month with the most sunshine days is January (14.8 days).
The month with the least sunshine days is May (1.2 days).
Average UV index
Sirimalwatta, Sri Lanka
The months with the highest UV index are January, February, March, April, May, June, July, August, September, November and December (UV index 6).
The month with the lowest UV index is October (UV index 5).
Average cloud cover
Sirimalwatta, Sri Lanka
The months with the most cloud cover are November and December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 27).
Average visibility
Sirimalwatta, Sri Lanka
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March, April, November and December (8km).
