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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 Hiriwadunna, Sri Lanka, is a moderately hot winter month, with temperature in the range of an average high of 29.3°C (84.7°F) and an average low of 20°C (68°F). Hiriwadunna experiences its coldest period in January and December, averaging a high-temperature of 29.3°C (84.7°F). The heat index for January is appraised at a sweltering 36°C (96.8°F). Weather in January »
Weather in February
February, the last month of the winter in Hiriwadunna, is a hot month, with an average temperature fluctuating between 31.3°C (88.3°F) and 20°C (68°F). The shift into February reveals an average high-temperature of a tropical 31.3°C (88.3°F), closely mirroring January's climate. Weather in February »
Weather in March
March, the first month of the spring in Hiriwadunna, is still a hot month, with an average temperature fluctuating between 33.8°C (92.8°F) and 21.1°C (70°F). As Hiriwadunna welcomes March, the average high-temperature stabilizes at a still hot 33.8°C (92.8°F), showing little deviation from February's 31.3°C (88.3°F). Weather in March »
Weather in April
April, the same as March, in Hiriwadunna, Sri Lanka, is another hot spring month, with temperature in the range of an average low of 23.5°C (74.3°F) and an average high of 34.9°C (94.8°F). In Hiriwadunna, Sri Lanka, April is the month with the highest recorded average temperatures, measuring a high of 34.9°C (94.8°F) and a low of 23.5°C (74.3°F). The heat index in April is appraised at a life-threatening hot 52°C (125.6°F). Weather in April »
Weather in May
The last month of the spring, May, is also a hot month in Hiriwadunna, Sri Lanka, with an average temperature varying between 34.2°C (93.6°F) and 24.5°C (76.1°F). Hiriwadunna's weather in May indicates an average high-temperature of a still hot 34.2°C (93.6°F), nearly consistent with the 34.9°C (94.8°F) of April. Weather in May »
Weather in June
The first month of the summer, June, is also a hot month in Hiriwadunna, Sri Lanka, with an average temperature ranging between max 33.6°C (92.5°F) and min 24.8°C (76.6°F). June registers an average high-temperature of a still hot 33.6°C (92.5°F), slightly varied from May's 34.2°C (93.6°F). Weather in June »
Weather in July
July, like June, is another tropical summer month in Hiriwadunna, Sri Lanka, with an average temperature varying between 33.5°C (92.3°F) and 24.5°C (76.1°F). The onset of July manifests an average high-temperature of a still hot 33.5°C (92.3°F), demonstrating a minor variation from the preceding month. Weather in July »
Weather in August
August, the last month of the summer in Hiriwadunna, is another tropical month, with an average temperature varying between 24.3°C (75.7°F) and 33.7°C (92.7°F). Hiriwadunna's average high-temperature in August sits at a still hot 33.7°C (92.7°F), showing little difference from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Hiriwadunna, is still a tropical month, with an average temperature fluctuating between 33.9°C (93°F) and 24.1°C (75.4°F). Hiriwadunna, Sri Lanka, records an average high-temperature of a still hot 33.9°C (93°F) in September, closely mirroring the climate of the previous month. Weather in September »
Weather in October
October, the same as September, in Hiriwadunna, Sri Lanka, is another hot autumn month, with an average temperature varying between 23.2°C (73.8°F) and 32.7°C (90.9°F). Transitioning from September to October, Hiriwadunna observes an average high-temperature of a still hot 32.7°C (90.9°F), differing subtly from the previous month. Weather in October »
Weather in November
The last month of the autumn, November, is also a hot month in Hiriwadunna, Sri Lanka, with an average temperature varying between 22°C (71.6°F) and 30.5°C (86.9°F). The introduction of November sees an average high-temperature of a still tropical 30.5°C (86.9°F), hardly deviating from October. Weather in November »
Weather in December
December, the first month of the winter in Hiriwadunna, is still a warm month, with an average temperature varying between 21.4°C (70.5°F) and 29.3°C (84.7°F). Hiriwadunna experiences the lowest of its temperatures in January and December, when the average high-temperatures rise to 29.3°C (84.7°F). December's mean heat index is appraised at a fiery hot 37°C (98.6°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 coldest month in Hiriwadunna?
January and December in Hiriwadunna, Sri Lanka, are characterised by lowest temperatures, with an average high of 29.3°C (84.7°F).
How many days does it rain in Hiriwadunna?
Throughout the year, in Hiriwadunna, there are 196.8 rainfall days, and 943mm (37.13") of precipitation is accumulated.
When is the lowest UV index in Hiriwadunna?
January, November and December, with an average maximum UV index of 6, are months with the lowest UV index.
What are the months with the highest UV index in Hiriwadunna?
The months with the highest UV index in Hiriwadunna are February through October, with an average maximum UV index of 7.
What is the hottest time of year in Hiriwadunna?
Hiriwadunna notes the warmest temperatures in April, with a average high of 34.9°C (94.8°F) and a low of 23.5°C (74.3°F).
What is the least humid month in Hiriwadunna?
The months with the lowest humidity in Hiriwadunna, Sri Lanka, are June through September, with an average relative humidity of 67%.
What is the driest month in Hiriwadunna?
The month with the least rainfall is June, when the rain falls for 7.8 days and typically collects 15mm (0.59") of precipitation.
When are the longest days in Hiriwadunna?
The month with the longest days in Hiriwadunna is June, with an average of 12h and 36min of daylight.
What month has the most sunshine in Hiriwadunna?
The month with the most sunshine is June, with an average of 11.3h of sunshine.
What is the wettest month in Hiriwadunna?
The month with the most rainfall in Hiriwadunna is October, when the rain falls for 22.6 days and typically aggregates up to 214mm (8.43") of precipitation.
What is the most humid month in Hiriwadunna?
December is the most humid month in Hiriwadunna, with an average relative humidity of 84%.
What is the month with the shortest days in Hiriwadunna?
The month with the shortest days in Hiriwadunna, Sri Lanka, is December, with an average of 11h and 42min of daylight.
Is there Daylight Saving Time (DST) in Hiriwadunna?
Hiriwadunna does not utilize Daylight Saving Time (DST). +0530 timezone is used throughout the entire year.
What is the month with the least sunshine in Hiriwadunna?
December has the least sunshine of the year in Hiriwadunna, Sri Lanka, with an average of 4.9h of sunshine.
Average temperature
Hiriwadunna, Sri Lanka
The warmest month (with the highest average high temperature) is April (34.9°C).
The months with the lowest average high temperature are January and December (29.3°C).
The month with the highest average low temperature is June (24.8°C).
The coldest months (with the lowest average low temperature) are January and February (20°C).
Average pressure
Hiriwadunna, Sri Lanka
- Average pressure in January:
1012mbar - Average pressure in February:
1011.6mbar - Average pressure in March:
1010.8mbar - Average pressure in April:
1009.4mbar - Average pressure in May:
1007.8mbar - Average pressure in June:
1007.5mbar
- Average pressure in July:
1007.6mbar - Average pressure in August:
1008mbar - Average pressure in September:
1008.8mbar - Average pressure in October:
1009.5mbar - Average pressure in November:
1009.8mbar - Average pressure in December:
1010.6mbar
The month with the highest atmospheric pressure is January (1012mbar).
The month with the lowest atmospheric pressure is June (1007.5mbar).
Average wind speed
Hiriwadunna, Sri Lanka
- Average wind speed in January:
9.9km/h - Average wind speed in February:
10.3km/h - Average wind speed in March:
8.7km/h - Average wind speed in April:
7.1km/h - Average wind speed in May:
15.9km/h - Average wind speed in June:
23.8km/h
- Average wind speed in July:
22.6km/h - Average wind speed in August:
21.3km/h - Average wind speed in September:
18.7km/h - Average wind speed in October:
11.1km/h - Average wind speed in November:
7.9km/h - Average wind speed in December:
9.1km/h
The windiest month (with the highest average wind speed) is June (23.8km/h).
The calmest month (with the lowest average wind speed) is April (7.1km/h).
Average humidity
Hiriwadunna, Sri Lanka
The month with the highest relative humidity is December (84%).
The months with the lowest relative humidity are June, July, August and September (67%).
Average rainfall
Hiriwadunna, Sri Lanka
The wettest month (with the highest rainfall) is October (214mm).
The driest month (with the least rainfall) is June (15mm).
Average rainfall days
Hiriwadunna, Sri Lanka
- Average rainfall days in January:
16 days - Average rainfall days in February:
13.1 days - Average rainfall days in March:
14 days - Average rainfall days in April:
23.6 days - Average rainfall days in May:
17.4 days - Average rainfall days in June:
7.8 days
- Average rainfall days in July:
10.3 days - Average rainfall days in August:
11.5 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
22.6 days - Average rainfall days in November:
24.1 days - Average rainfall days in December:
22.9 days
The month with the highest number of rainy days is November (24.1 days).
The month with the least rainy days is June (7.8 days).
Average daylight / Average sunshine
Hiriwadunna, Sri Lanka
- Average daylight in January:
11h and 4min - 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 4min
- 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:
11h and 5min - 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 36min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in January:
7h and 2min - Average sunshine in February:
8h and 1min - Average sunshine in March:
9h and 1min - Average sunshine in April:
10h and 1min - Average sunshine in May:
11h and 1min - Average sunshine in June:
11h and 2min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
9h and 4min - Average sunshine in September:
10h and 5min - Average sunshine in October:
8h and 2min - Average sunshine in November:
6h and 2min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days
Hiriwadunna, Sri Lanka
- Average sunshine days in January:
11.7 days - Average sunshine days in February:
12.7 days - Average sunshine days in March:
14.5 days - Average sunshine days in April:
4.3 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
15.7 days
- Average sunshine days in July:
16 days - Average sunshine days in August:
14.7 days - Average sunshine days in September:
13.3 days - Average sunshine days in October:
6.4 days - Average sunshine days in November:
4.2 days - Average sunshine days in December:
5.9 days
The month with the most sunshine days is July (16 days).
The month with the least sunshine days is November (4.2 days).
Average UV index
Hiriwadunna, Sri Lanka
The months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, November and December (UV index 6).
Average cloud cover
Hiriwadunna, Sri Lanka
The month with the most cloud cover is December (Cloud cover 56).
The month with the least cloud cover is May (Cloud cover 26).
Average visibility
Hiriwadunna, Sri Lanka
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are January and December (7km).
