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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, like December, in Rathkarawwa, Sri Lanka, is another warm winter month, with an average temperature ranging between min 23.9°C (75°F) and max 29.2°C (84.6°F). Rathkarawwa records an average high-temperature of a still warm 29.2°C (84.6°F) in January, maintaining a close correlation with December's 29°C (84.2°F). Weather in January »
Weather in February
The last month of the winter, February, is also a moderately hot month in Rathkarawwa, Sri Lanka, with an average temperature ranging between min 24.3°C (75.7°F) and max 29.7°C (85.5°F). Rathkarawwa records a slight change with February's average high-temperatures adjusting to a still moderately hot 29.7°C (85.5°F) from January's 29.2°C (84.6°F). Weather in February »
Weather in March
March, the first month of the spring in Rathkarawwa, is a tropical month, with an average temperature fluctuating between 24.9°C (76.8°F) and 30.4°C (86.7°F). March's beginning signals an average high-temperature of a tropical 30.4°C (86.7°F), barely different from February's 29.7°C (85.5°F). Weather in March »
Weather in April
April, like March, is another hot spring month in Rathkarawwa, Sri Lanka, with an average temperature varying between 26°C (78.8°F) and 31.1°C (88°F). April, with its average high-temperature of 31.1°C (88°F) and an average low-temperature of 26°C (78.8°F), holds the record as the warmest month. For most parts of April, the heat index is calculated to be a blistering 40°C (104°F). Weather in April »
Weather in May
May, the last month of the spring in Rathkarawwa, is another tropical month, with an average temperature ranging between max 30.8°C (87.4°F) and min 26.7°C (80.1°F). During May, Rathkarawwa records an average high-temperature of a still hot 30.8°C (87.4°F), marking a slight divergence from April's 31.1°C (88°F). Weather in May »
Weather in June
The first month of the summer, June, is still a hot month in Rathkarawwa, Sri Lanka, with an average temperature ranging between min 26.6°C (79.9°F) and max 30.6°C (87.1°F). The transition from May to June sees an average high-temperature of a still tropical 30.6°C (87.1°F), indicating a minor variance from the prior month. Weather in June »
Weather in July
July, the same as June, in Rathkarawwa, Sri Lanka, is another tropical summer month, with temperature in the range of an average high of 30.7°C (87.3°F) and an average low of 26.3°C (79.3°F). Rathkarawwa sees the arrival of July with an average high-temperature of a still hot 30.7°C (87.3°F), indicating a subtle variation from June. Weather in July »
Weather in August
The last month of the summer, August, is another tropical month in Rathkarawwa, Sri Lanka, with an average temperature ranging between min 26.3°C (79.3°F) and max 30.4°C (86.7°F). Rathkarawwa records a slight change with August's average high-temperatures adjusting to a still tropical 30.4°C (86.7°F) from July's 30.7°C (87.3°F). Weather in August »
Weather in September
The first month of the autumn, September, is also a hot month in Rathkarawwa, Sri Lanka, with an average temperature varying between 30.1°C (86.2°F) and 26°C (78.8°F). The introduction of September notes a subtle temperature variation to a still hot 30.1°C (86.2°F) from August's 30.4°C (86.7°F). Weather in September »
Weather in October
October, the same as September, in Rathkarawwa, Sri Lanka, is another tropical autumn month, with an average temperature ranging between max 30°C (86°F) and min 25.9°C (78.6°F). Rathkarawwa notes an average high-temperature of a still hot 30°C (86°F) in October, hardly diverging from September. Weather in October »
Weather in November
The last month of the autumn, November, is also a moderately hot month in Rathkarawwa, Sri Lanka, with an average temperature ranging between max 29.2°C (84.6°F) and min 25.3°C (77.5°F). The commencement of November records an average high-temperature of a moderately hot 29.2°C (84.6°F), barely varying from October's 30°C (86°F). Weather in November »
Weather in December
The first month of the winter, December, is also a moderately hot month in Rathkarawwa, Sri Lanka, with an average temperature varying between 24.5°C (76.1°F) and 29°C (84.2°F). December, noted for its average high-temperature of 29°C (84.2°F) and an average low-temperature of 24.5°C (76.1°F), is considered the coldest month. December's mean heat index is calculated to be a very hot 35°C (95°F). Weather in December »
Updated: Aug 3, 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
How many days does it rain?
Throughout the year, there are 192.9 rainfall days, and 942mm (37.09") of precipitation is accumulated.
What is the month with the highest UV index?
January through September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Rathkarawwa.
What are the warmest months?
The warmest period is April, when temperatures fluctuate between an average high of 31.1°C (88°F) and a low of 26°C (78.8°F).
When are the longest days?
The month with the longest days is June, with an average of 12h and 30min of daylight.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 11.3h of sunshine.
What is the least humid month?
With an average relative humidity of 74%, July is the least humid month.
What is the driest month in Rathkarawwa?
July is the month with the least rainfall. Rain falls for 10.6 days and accumulates 16mm (0.63") of precipitation.
When is the lowest UV index?
October is the month with the lowest UV index, with an average maximum UV index of 6.
What is the most humid month?
November and December, with an average relative humidity of 79%, are most humid months in Rathkarawwa.
What is the rainiest month?
The month with the most rainfall in Rathkarawwa is November, when the rain falls for 25.3 days and typically aggregates up to 182mm (7.17") of precipitation.
What are the coldest months?
December, noted for its average high-temperature of 29°C (84.2°F) and an average low-temperature of 24.5°C (76.1°F), is considered the coldest month.
What is the month with the shortest days?
The month with the shortest days in Rathkarawwa is December, with an average of 11h and 42min of daylight.
Is there Daylight Saving Time (DST)?
Rathkarawwa does not observe Daylight Saving Time (DST). +0530 timezone is used over the entire year.
What is the month with the least sunshine?
December has the least sunshine of the year, with an average of 6.6h of sunshine.
Average temperature
Rathkarawwa, Sri Lanka
The warmest month (with the highest average high temperature) is April (31.1°C).
The month with the lowest average high temperature is December (29°C).
The month with the highest average low temperature is May (26.7°C).
The coldest month (with the lowest average low temperature) is January (23.9°C).
Average pressure
Rathkarawwa, Sri Lanka
- Average pressure in January:
1011.5mbar - Average pressure in February:
1011.2mbar - Average pressure in March:
1010.8mbar - Average pressure in April:
1009.8mbar - Average pressure in May:
1008.6mbar - Average pressure in June:
1008.7mbar
- Average pressure in July:
1008.7mbar - Average pressure in August:
1009.1mbar - Average pressure in September:
1009.8mbar - Average pressure in October:
1010mbar - Average pressure in November:
1009.8mbar - Average pressure in December:
1010.2mbar
The month with the highest atmospheric pressure is January (1011.5mbar).
The month with the lowest atmospheric pressure is May (1008.6mbar).
Average wind speed
Rathkarawwa, Sri Lanka
- Average wind speed in January:
16.7km/h - Average wind speed in February:
17.3km/h - Average wind speed in March:
13.3km/h - Average wind speed in April:
12km/h - Average wind speed in May:
21.4km/h - Average wind speed in June:
26.4km/h
- Average wind speed in July:
26.3km/h - Average wind speed in August:
26.1km/h - Average wind speed in September:
23.5km/h - Average wind speed in October:
16.8km/h - Average wind speed in November:
11.7km/h - Average wind speed in December:
14.4km/h
The windiest month (with the highest average wind speed) is June (26.4km/h).
The calmest month (with the lowest average wind speed) is November (11.7km/h).
Average humidity
Rathkarawwa, Sri Lanka
The months with the highest relative humidity are November and December (79%).
The month with the lowest relative humidity is July (74%).
Average rainfall
Rathkarawwa, Sri Lanka
The wettest month (with the highest rainfall) is November (182mm).
The driest month (with the least rainfall) is July (16mm).
Average rainfall days
Rathkarawwa, Sri Lanka
- Average rainfall days in January:
11.3 days - Average rainfall days in February:
10.9 days - Average rainfall days in March:
15.5 days - Average rainfall days in April:
22.8 days - Average rainfall days in May:
17.8 days - Average rainfall days in June:
10.7 days
- Average rainfall days in July:
10.6 days - Average rainfall days in August:
11 days - Average rainfall days in September:
14.4 days - Average rainfall days in October:
22.5 days - Average rainfall days in November:
25.3 days - Average rainfall days in December:
20.1 days
The month with the highest number of rainy days is November (25.3 days).
The month with the least rainy days is July (10.6 days).
Average daylight / Average sunshine
Rathkarawwa, 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 2min - 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:
9h and 1min - Average sunshine in February:
9h and 1min - Average sunshine in March:
9h and 2min - Average sunshine in April:
10h and 1min - Average sunshine in May:
10h and 5min - Average sunshine in June:
11h and 2min
- Average sunshine in July:
10h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
10h and 4min - Average sunshine in October:
8h and 3min - Average sunshine in November:
7h and 5min - Average sunshine in December:
6h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days
Rathkarawwa, Sri Lanka
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
13.3 days - Average sunshine days in April:
4.7 days - Average sunshine days in May:
9.6 days - Average sunshine days in June:
14.8 days
- Average sunshine days in July:
17.2 days - Average sunshine days in August:
15.7 days - Average sunshine days in September:
12.5 days - Average sunshine days in October:
7 days - Average sunshine days in November:
3.6 days - Average sunshine days in December:
9.2 days
The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is November (3.6 days).
Average UV index
Rathkarawwa, Sri Lanka
The months with the highest UV index are January, February, March, April, May, June, July, August, September, November and December (UV index 7).
The month with the lowest UV index is October (UV index 6).
Average cloud cover
Rathkarawwa, Sri Lanka
The month with the most cloud cover is November (Cloud cover 40).
The month with the least cloud cover is March (Cloud cover 21).
Average visibility
Rathkarawwa, Sri Lanka
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (10km).
The month with the lowest visibility is November (9km).
