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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 snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Harrow, United Kingdom, is a frosty winter month, with an average temperature ranging between max 6.7°C (44.1°F) and min 1.9°C (35.4°F). Harrow's January weather, marked by an average high temperature of 6.7°C (44.1°F) and an average low temperature of 1.9°C (35.4°F), is the coldest in the year. Weather in January »
Weather in February
February, the last month of the winter in Harrow, is also a frosty month, with an average temperature ranging between max 7.5°C (45.5°F) and min 2.5°C (36.5°F). Harrow measures an average high-temperature of a still frosty 7.5°C (45.5°F) in February, nearly consistent with the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Harrow, United Kingdom, with an average temperature fluctuating between 3.3°C (37.9°F) and 10.4°C (50.7°F). March is marked by an average high-temperature of a cool 10.4°C (50.7°F), almost identical to the preceding month. Weather in March »
Weather in April
April in Harrow, United Kingdom, is a refreshing spring month, with an average temperature fluctuating between 5.4°C (41.7°F) and 14.2°C (57.6°F). April brings a slight rise in Harrow's average high-temperature, moving from a cool 10.4°C (50.7°F) in March to a mild 14.2°C (57.6°F). Weather in April »
Weather in May
May, the last month of the spring in Harrow, is a refreshing month, with an average temperature varying between 16.5°C (61.7°F) and 7.9°C (46.2°F). May is marked by an average high-temperature of a still refreshing 16.5°C (61.7°F), almost identical to the preceding month. Weather in May »
Weather in June
June, the first month of the summer in Harrow, is still a refreshing month, with temperature in the range of an average low of 10.8°C (51.4°F) and an average high of 19.5°C (67.1°F). Harrow's June weather indicates a minor increase in high-temperatures, edging from May's enjoyable 16.5°C (61.7°F) to a still refreshing 19.5°C (67.1°F). Weather in June »
Weather in July
July in Harrow, United Kingdom, is an agreeable summer month, with an average temperature fluctuating between 21.8°C (71.2°F) and 13.2°C (55.8°F). July is the warmest month of the year, registering average temperatures as high as 21.8°C (71.2°F) and as low as 13.2°C (55.8°F). Weather in July »
Weather in August
The last month of the summer, August, is another pleasant month in Harrow, United Kingdom, with an average temperature ranging between min 13.7°C (56.7°F) and max 21.6°C (70.9°F). As July transitions into August, Harrow records an average high-temperature of a still pleasant 21.6°C (70.9°F), showing a gentle shift from the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Harrow, is also an enjoyable month, with an average temperature ranging between max 18.8°C (65.8°F) and min 11.2°C (52.2°F). September registers an average high-temperature of a comfortable 18.8°C (65.8°F), slightly varied from August's 21.6°C (70.9°F). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Harrow, United Kingdom, with an average temperature ranging between max 15°C (59°F) and min 8.9°C (48°F). The arrival of October corresponds with a light shift in temperature, down from an enjoyable 18.8°C (65.8°F) in September to a still refreshing 15°C (59°F). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Harrow, United Kingdom, with an average temperature ranging between max 10.2°C (50.4°F) and min 5.6°C (42.1°F). The average high-temperature slightly decreases in November, shifting from a moderate 15°C (59°F) in October to a cool 10.2°C (50.4°F). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Harrow, United Kingdom, with an average temperature fluctuating between 3.3°C (37.9°F) and 7.6°C (45.7°F). The average high-temperature during December registers at a frosty 7.6°C (45.7°F), closely corresponding to the preceding month. Weather in December »
[Resources]Frequently asked questions
What is the coldest month in Harrow?
January, marked by an average high-temperature of 6.7°C (44.1°F) and a low-temperature of 1.9°C (35.4°F), is the coldest month in Harrow.
What is the driest month in Harrow?
January is the month with the least rainfall in Harrow, United Kingdom. Rain falls for 11 days and accumulates 19mm (0.75") of precipitation.
How many days does it rain in Harrow?
Throughout the year, in Harrow, United Kingdom, there are 165.8 rainfall days, and 345mm (13.58") of precipitation is accumulated.
When does it snow in Harrow?
Months with snowfall in Harrow, United Kingdom, are January through March, November and December.
How many days does it snow in Harrow?
In Harrow, United Kingdom, during the entire year, snow falls for 5.5 days and aggregates up to 40mm (1.57") of snow.
When is the lowest UV index in Harrow?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Harrow, United Kingdom.
What is the snowiest month in Harrow?
The month with the most snowfall is February, when snow falls for 2.1 days and typically aggregates up to 16mm (0.63") of snow.
What is the month with the least sunshine in Harrow?
The month with the least sunshine in Harrow is February, with an average of 3.7h of sunshine.
When it does not snow in Harrow?
In Harrow, United Kingdom, snow does not fall in April through October.
What is the rainiest month in Harrow?
The month with the most rainfall in Harrow, United Kingdom, is June, when the rain falls for 17.4 days and typically aggregates up to 46mm (1.81") of precipitation.
When are the longest days in Harrow?
June has the longest days of the year, with an average of 16h and 36min of daylight.
What are the months with the highest UV index in Harrow?
June and July, with an average maximum UV index of 5, are months with the highest UV index in Harrow.
What part of the year is the hottest in Harrow?
July stands out as Harrow's warmest month, with an average high-temperature of 21.8°C (71.2°F) and a low-temperature of 13.2°C (55.8°F).
What is the least humid month in Harrow?
July and August, with an average relative humidity of 74%, are the least humid months in Harrow, United Kingdom.
What are the months with the most sunshine in Harrow?
July and August, with an average of 8h of sunshine, are months with the most sunshine.
When is Daylight Saving Time (DST) in Harrow?
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.
What is the most humid month in Harrow?
The most humid month is December, with an average relative humidity of 89%.
What is the month with the shortest days in Harrow?
December has the shortest days of the year, with an average of 7h and 54min of daylight.
Average temperature
Harrow, United Kingdom
The warmest month (with the highest average high temperature) is July (21.8°C).
The month with the lowest average high temperature is January (6.7°C).
The month with the highest average low temperature is August (13.7°C).
The coldest month (with the lowest average low temperature) is January (1.9°C).
Average pressure
Harrow, United Kingdom
- Average pressure in January:
1014.5mbar - Average pressure in February:
1013.8mbar - Average pressure in March:
1015.5mbar - Average pressure in April:
1015.7mbar - Average pressure in May:
1016.8mbar - Average pressure in June:
1016.2mbar
- Average pressure in July:
1015.3mbar - Average pressure in August:
1014.8mbar - Average pressure in September:
1016.9mbar - Average pressure in October:
1015.1mbar - Average pressure in November:
1010.5mbar - Average pressure in December:
1014.4mbar
The month with the highest atmospheric pressure is September (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).
Average wind speed
Harrow, United Kingdom
- Average wind speed in January:
16.8km/h - Average wind speed in February:
17.6km/h - Average wind speed in March:
16.1km/h - Average wind speed in April:
13.5km/h - Average wind speed in May:
13.5km/h - Average wind speed in June:
13km/h
- Average wind speed in July:
12.7km/h - Average wind speed in August:
12.9km/h - Average wind speed in September:
12.8km/h - Average wind speed in October:
14.6km/h - Average wind speed in November:
15.8km/h - Average wind speed in December:
17.3km/h
The windiest month (with the highest average wind speed) is February (17.6km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity
Harrow, United Kingdom
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are July and August (74%).
Average rainfall
Harrow, United Kingdom
The wettest month (with the highest rainfall) is June (46mm).
The driest month (with the least rainfall) is January (19mm).
Average rainfall days
Harrow, United Kingdom
- Average rainfall days in January:
11 days - Average rainfall days in February:
10.8 days - Average rainfall days in March:
12.7 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
17.4 days
- Average rainfall days in July:
18.4 days - Average rainfall days in August:
16.7 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
12.5 days - Average rainfall days in November:
11 days - Average rainfall days in December:
12.2 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is February (10.8 days).
Average snowfall
Harrow, United Kingdom
The month with the highest snowfall is February (16mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Harrow, United Kingdom
- Average snowfall days in January:
1.8 days - Average snowfall days in February:
2.1 days - Average snowfall days in March:
0.7 days - Average snowfall days in April:
0.1 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:
0.2 days - Average snowfall days in December:
0.6 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Harrow, United Kingdom
- Average daylight in January:
8h and 2min - Average daylight in February:
10h and 0min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 5min - Average daylight in May:
15h and 4min - Average daylight in June:
16h and 4min
- Average daylight in July:
16h and 1min - Average daylight in August:
14h and 4min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 4min - Average daylight in November:
8h and 5min - Average daylight in December:
7h and 5min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
3h and 4min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 4min - Average sunshine in May:
7h and 3min - Average sunshine in June:
7h and 3min
- Average sunshine in July:
8h and 0min - Average sunshine in August:
8h and 0min - Average sunshine in September:
7h and 1min - Average sunshine in October:
4h and 4min - Average sunshine in November:
4h and 1min - Average sunshine in December:
4h and 2min
The months with the most sunshine are July and August (Average sunshine: 8h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days
Harrow, United Kingdom
- Average sunshine days in January:
16 days - Average sunshine days in February:
13.6 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
11.9 days - Average sunshine days in May:
9.8 days - Average sunshine days in June:
9.7 days
- Average sunshine days in July:
9.3 days - Average sunshine days in August:
10.3 days - Average sunshine days in September:
14.1 days - Average sunshine days in October:
14.9 days - Average sunshine days in November:
16 days - Average sunshine days in December:
16.3 days
The month with the most sunshine days is December (16.3 days).
The month with the least sunshine days is July (9.3 days).
Average UV index
Harrow, 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
Harrow, United Kingdom
The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are April and September (Cloud cover 49).
Average visibility
Harrow, United Kingdom
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
The month with the lowest visibility is November (8km).
Harrow, United Kingdom
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