Climate and monthly weather forecastHarleston, United Kingdom
Climate and monthly weather forecast
Weather in January
January, like December, is a frosty winter month in Harleston, United Kingdom, with temperature in the range of an average high of 6.4°C (43.5°F) and an average low of 2.6°C (36.7°F). Harleston's January weather reaches an average high of 6.4°C (43.5°F) and an average low of 2.6°C (36.7°F), making it the coldest month. Weather in January »Weather in February
The last month of the winter, February, is another chilly month in Harleston, United Kingdom, with temperature in the range of an average high of 7.2°C (45°F) and an average low of 2.8°C (37°F). February reports an average high-temperature of a still chilly 7.2°C (45°F), slightly varied from January's 6.4°C (43.5°F). Weather in February »Weather in March
March, the first month of the spring in Harleston, is still a chilly month, with an average temperature varying between 3.9°C (39°F) and 9.6°C (49.3°F). During March, the average high-temperature is a still chilly 9.6°C (49.3°F), maintaining a close resemblance to that of the preceding month. Weather in March »Weather in April
April is a fresh spring month in Harleston, United Kingdom, with temperature in the range of an average low of 5.7°C (42.3°F) and an average high of 12.7°C (54.9°F). Harleston's transition into April is marked by a minor temperature shift, moving from a frosty 9.6°C (49.3°F) in March to a fresh 12.7°C (54.9°F). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Harleston, United Kingdom, with an average temperature fluctuating between 8.1°C (46.6°F) and 14.9°C (58.8°F). With the arrival of May, Harleston's average high-temperature registers at a refreshing 14.9°C (58.8°F), indicating a subtle variation from the previous month. Weather in May »Weather in June
The first month of the summer, June, is a refreshing month in Harleston, United Kingdom, with an average temperature fluctuating between 10.6°C (51.1°F) and 17.8°C (64°F). Harleston signifies an average high-temperature of a comfortable 17.8°C (64°F) in June, closely mirroring the 14.9°C (58.8°F) of May. Weather in June »Weather in July
July in Harleston, United Kingdom, is a pleasant summer month, with temperature in the range of an average low of 13.3°C (55.9°F) and an average high of 20.5°C (68.9°F). As Harleston, United Kingdom, transitions into July, the average high-temperature stands at a pleasant 20.5°C (68.9°F), offering little variation from the preceding month. Weather in July »Weather in August
The last month of the summer, August, is also an agreeable month in Harleston, United Kingdom, with temperature in the range of an average low of 14.3°C (57.7°F) and an average high of 20.9°C (69.6°F). August is Harleston's warmest month, registering average high temperatures of 20.9°C (69.6°F) and lows of 14.3°C (57.7°F). Weather in August »Weather in September
The first month of the autumn, September, is also an enjoyable month in Harleston, United Kingdom, with an average temperature varying between 18.3°C (64.9°F) and 12.3°C (54.1°F). Harleston marks the onset of September with an average high-temperature of a refreshing 18.3°C (64.9°F), a subtle shift from August's 20.9°C (69.6°F). Weather in September »Weather in October
October, like September, is another mild autumn month in Harleston, United Kingdom, with an average temperature ranging between min 10°C (50°F) and max 14.5°C (58.1°F). October ushers in a minute temperature change, with average high-temperatures reducing from September's refreshing 18.3°C (64.9°F) to a moderate 14.5°C (58.1°F). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Harleston, United Kingdom, with an average temperature varying between 6.5°C (43.7°F) and 10.3°C (50.5°F). November's arrival signals a moderate reduction in the average high-temperature, easing from a moderate 14.5°C (58.1°F) in October to a fresh 10.3°C (50.5°F). Weather in November »Weather in December
December, the first month of the winter in Harleston, is also a frosty month, with temperature in the range of an average low of 3.9°C (39°F) and an average high of 7.4°C (45.3°F). The beginning of December reveals an average high-temperature of a chilly 7.4°C (45.3°F), showing minimal deviation from the previous month. Weather in December »Updated: Feb 8, 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 lowest temperatures are recorded in January, with averages reaching a high of 6.4°C (43.5°F) and a low of 2.6°C (36.7°F).
Throughout the year, in Harleston, there are 159.6 rainfall days, and 268mm (10.55") of precipitation is accumulated.
Months with snowfall in Harleston are January through April, November and December.
In Harleston, during the entire year, snow falls for 11.4 days and aggregates up to 52mm (2.05") of snow.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
February is the month with the most snowfall. Snow falls for 3.8 days and accumulates 20mm (0.79") of snow.
The month with the least sunshine in Harleston is February, with an average of 3.8h of sunshine.
The month with the least rainfall is April, when the rain falls for 11.5 days and typically collects 12mm (0.47") of precipitation.
May through October are months without snowfall in Harleston.
With an average of 16h and 42min of daylight, June has the longest days of the year.
June and July, with an average maximum UV index of 5, are months with the highest UV index.
The months with the most rainfall in Harleston are July and December, with an average 29mm (1.14") of precipitation.
August is the month when Harleston's temperatures reach their peak, with averages of 20.9°C (69.6°F) and lows of 14.3°C (57.7°F).
The least humid month is August, with an average relative humidity of 75%.
August has the most sunshine of the year, with an average of 8.8h of sunshine.
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time ends, and the time zone changes from BST to GMT. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to BST.
December is the most humid month in Harleston, United Kingdom, with an average relative humidity of 88%.
With an average of 7h and 48min of daylight, December has the shortest days of the year.
Average temperature
Harleston, United Kingdom
The warmest month (with the highest average high temperature) is August (20.9°C).
The month with the lowest average high temperature is January (6.4°C).
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (2.6°C).
Average pressure
Harleston, United Kingdom
- Average pressure in January:
1013.8mbar - Average pressure in February:
1013.3mbar - Average pressure in March:
1015.2mbar - Average pressure in April:
1015.8mbar - Average pressure in May:
1016.6mbar - Average pressure in June:
1016mbar
- Average pressure in July:
1014.9mbar - Average pressure in August:
1014.4mbar - Average pressure in September:
1016.5mbar - Average pressure in October:
1014.8mbar - Average pressure in November:
1010.2mbar - Average pressure in December:
1013.5mbar
The month with the highest atmospheric pressure is May (1016.6mbar).
The month with the lowest atmospheric pressure is November (1010.2mbar).
Average wind speed
Harleston, United Kingdom
- Average wind speed in January:
19.5km/h - Average wind speed in February:
20km/h - Average wind speed in March:
17.8km/h - Average wind speed in April:
15.1km/h - Average wind speed in May:
15km/h - Average wind speed in June:
14.1km/h
- Average wind speed in July:
13.7km/h - Average wind speed in August:
14.4km/h - Average wind speed in September:
14.8km/h - Average wind speed in October:
17.1km/h - Average wind speed in November:
18.4km/h - Average wind speed in December:
20.3km/h
The windiest month (with the highest average wind speed) is December (20.3km/h).
The calmest month (with the lowest average wind speed) is July (13.7km/h).
Average humidity
Harleston, United Kingdom
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (75%).
Average rainfall
Harleston, United Kingdom
The wettest months (with the highest rainfall) are July and December (29mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days
Harleston, United Kingdom
- Average rainfall days in January:
13.4 days - Average rainfall days in February:
11.6 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
11.5 days - Average rainfall days in May:
13.3 days - Average rainfall days in June:
12.7 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
15.1 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
14.3 days - Average rainfall days in November:
14.3 days - Average rainfall days in December:
13.9 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is September (11.3 days).
Average snowfall
Harleston, United Kingdom
The month with the highest snowfall is February (20mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days
Harleston, United Kingdom
- Average snowfall days in January:
3.2 days - Average snowfall days in February:
3.8 days - Average snowfall days in March:
1.5 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
2.1 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Harleston, United Kingdom
- Average daylight in January:
8h and 18min - Average daylight in February:
9h and 54min - Average daylight in March:
11h and 54min - Average daylight in April:
14h and 0min - Average daylight in May:
15h and 48min - Average daylight in June:
16h and 42min
- Average daylight in July:
16h and 12min - Average daylight in August:
14h and 36min - Average daylight in September:
12h and 42min - Average daylight in October:
10h and 36min - Average daylight in November:
8h and 48min - Average daylight in December:
7h and 48min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
3h and 48min - Average sunshine in March:
5h and 36min - Average sunshine in April:
8h and 12min - Average sunshine in May:
7h and 54min - Average sunshine in June:
8h and 0min
- Average sunshine in July:
8h and 18min - Average sunshine in August:
8h and 48min - Average sunshine in September:
7h and 42min - Average sunshine in October:
4h and 30min - Average sunshine in November:
4h and 6min - Average sunshine in December:
4h and 18min
The month with the most sunshine is August (Average sunshine: 8h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days
Harleston, United Kingdom
- Average sunshine days in January:
12.4 days - Average sunshine days in February:
11.3 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
14.4 days - Average sunshine days in June:
12.5 days
- Average sunshine days in July:
10.6 days - Average sunshine days in August:
12.9 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
13.3 days - Average sunshine days in November:
12.4 days - Average sunshine days in December:
13 days
The months with the most sunshine days are March and April (15.3 days).
The month with the least sunshine days is July (10.6 days).
Average UV index
Harleston, United Kingdom
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Harleston, United Kingdom
The months with the most cloud cover are January and February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 43).
Average visibility
Harleston, United Kingdom
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
