Climate and monthly weather forecastLondon, Canada
Climate and monthly weather forecast
The climate of London
Situated in the Southwestern part of Ontario, Canada, London experiences a Humid Continental climate, classified as 'Dfb' under the Köppen climate classification system. This climate is characterized by significant temperature fluctuations and no dry season, with warm summers.The city experiences an annual high-temperature average, ranging from a chilly -2.8°C (27°F) in January to a relatively mild 25.5°C (77.9°F) in July. Similarly, the average low temperatures span from -8.2°C (17.2°F) in January and February to 15.4°C (59.7°F) in July. There is a consistent variation of both values through the year, indicating a broad range of weather conditions.
Rainfall is another significant feature with an even distribution amid the year, ranging from 20mm (0.79") in March to a peak of 45mm (1.77") in July. Snowfall mostly occurs from November to March, with the highest accumulation of 71mm (2.8") in January and no occurrences from May to September.
Relative humidity and cloud cover remain relatively stable throughout the year, exhibiting a range from 75% in April and May to 88% in January and February and from 33% in July to 76% in January respectively. The city's wind speed varies from 10.4km/h (6.5mph) in July to 17.9km/h (11.1mph) in January, providing a breezy climate in most times.
The best time to visit London
For those who enjoy warm summer temperatures, June through August presents the most appealing weather in London, Canada. During these months, the average high temperatures range between 18.7°C (65.7°F) and 25.5°C (77.9°F). July is prominently the warmest month, with an average maximum temperature of 25.5°C (77.9°F). Summer also sees extended daylight hours, yielding from 14.7 to 15.3 hours a day, ensuring ample time for outdoor activities. The rainfall during these months ranges between 29mm (1.14") and 45mm (1.77"), indicating an occasional respite from the summer heat.The worst time to visit London
January and February are generally deemed the least desirable times to visit London due to harsh winter conditions. The top temperatures during these months hover around -2.8°C (27°F) to -1.7°C (28.9°F), while the low temperatures plunge to -8.2°C (17.2°F). Additionally, these months experience substantial snowfall, with January bearing the brunt at 71mm (2.8"). The daylight hours are relatively limited during winter, ranging from 9.1 hours in December to 10.6 hours in February, restricting daylight tourism.Spring weather in London
During the spring months from March through May, London transitions from the cold winter temperatures to more moderate conditions. The high temperatures during this time rise steadily from 3.9°C (39°F) in March to 18.7°C (65.7°F) in May, providing a pleasant atmosphere. The low temperatures also see an uplift from -3.3°C (26.1°F) to 8.8°C (47.8°F) in the same period. These months mark the onset of increased daylight hours and rainfall, signifying the arrival of blooming season.Summer weather in London
The summer period from June through August is characterized by overall warm weather with an average high temperature gradient of 18.7°C (65.7°F) to 25.5°C (77.9°F). July offers the warmest climate with a high of 25.5°C (77.9°F) and a comfortable low of 15.4°C (59.7°F). Despite an increase in the amount of rainfall between 29mm (1.14") and 34mm (1.34"), summer offers the longest daylight hours ranging from 14.7 to 15.3 hours and extended sunshine hours up to 10.1 hours.Autumn weather in London
Autumn in London, spanning from September through November, is characterized by a slow drop in temperature, reduced daylight hours, and increased rainfall. This period sees a fluctuation in high temperatures from 21.3°C (70.3°F) in September to 6.5°C (43.7°F) in November, and low temperatures ranging from 11.7°C (53.1°F) to 0.6°C (33.1°F) in the same period. Rainfall increases during this season, peaking at 38mm (1.5") in October.Winter weather in London
Winter in London, from December through February, is marked by cold temperatures, increased snowfall, and reduced daylight hours. The average high temperature drops drastically from 0.7°C (33.3°F) in December to -2.8°C (27°F) in January, while the low temperatures vary from -3.8°C (25.2°F) to -8.2°C (17.2°F). Snowfall in this season can range from 51mm (2.01") to 71mm (2.8"), with the highest amount typically falling in January. Days in this season become shorter, with daylight hours fluctuating between 9.1 to 10.6.Weather in January
Winter reigns supreme in January, the first month of the year, soaking London, Canada in a chilly mixture of snow and rain. A profound contrast exists between the average high temperature, which sits at a frigid -2.8°C (27°F), and the average low of -8.2°C (17.2°F). Weather in January »Weather in February
February does not offer much relief from January's deep freeze. A minor uptick in average temperature, with the high at -1.7°C (28.9°F), saves grace. The days grow longer, nudging past 10 hours of daylight, providing a few more glimpses of the sun. Weather in February »Weather in March
March heralds the beginning of thawing with the transition into spring. Weather conditions change noticeably compared to February, with an average high temperature of 3.9°C (39°F). Snow gives way to rain, prompting the trees to shake off their winter slumbers and bud anew. Weather in March »Weather in April
April embodies the spirit of spring in London. The moderate high average temperature of 10.7°C (51.3°F) illustrates the progression towards milder weather. Sunlight dances through the city for over 13 hours per day, marking the blossoming of life after the winter's sterile descent. Weather in April »Weather in May
May is when London, Canada, truly enters its stride into warm weather, shedding the last vestiges of winter. The city heats up to an average maximum of 18.7°C (65.7°F), a veritable jump from April's temperatures. The landscape, blooming in technicolor, is inviting, drawing people outdoors, making cities come alive with radiant energy. Weather in May »Weather in June
June presages the arrival of summer in earnest. London, Canada basks in the warmth of the sun as the average high temperature ascends to 22.7°C (72.9°F). The day is experienced to the fullest with over 15 hours of daylight, which bathes the landscape in crisp, clear light. Weather in June »Weather in July
July is the high point of summer in London, Canada, serving the highest average high temperatures of 25.5°C (77.9°F). Balmy breezes sweep through the city, carrying the scents of flowering plants and green foliage. People engage in the dizzying array of summertime activities that the city has to offer. Weather in July »Weather in August
August closely follows July's footsteps in terms of temperature, with a high average of 24.5°C (76.1°F), signaling the continuation of summer. The weather is characterized by long daylight hours that make for ample time to enjoy outdoor activities. Weather in August »Weather in September
September marks the shift from summer into autumn in London. The average high temperature drops significantly to 21.3°C (70.3°F) from August's highs, indicating summer's slow descent. Autumn hues punctuate the cityscape, painting a picturesque tableau against a golden sunset. Weather in September »Weather in October
October plunges deeper into fall, with much cooler temperatures, the high averages around 13.8°C (56.8°F). A noticeable chill enters the air, the dwindling temperatures are an early reminder of the upcoming winter. Fall foliage takes on richer hues, the bright crimsons and golds becoming more prominent. Weather in October »Weather in November
November further embraces the cold as temperatures drop markedly to an average high of 6.5°C (43.7°F). The city of London starts to consider winter preparations earnestly. Most of the leaves have fallen, revealing bare trees that stand in stark contrast to November's often grey skies. Weather in November »Weather in December
December welcomes the cold embrace of winter once again, with a high temperature average of only 0.7°C (33.3°F). Snowflakes return to London's weather scene, covering the city in a layer of winter's blanket. The city settles into a quieter rhythm, the frenzied pace of summer and fall replaced by the slow, steady beat of winter. Weather in December »Updated: Feb 4, 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
London's coldest weather arrives in January, when temperatures average a high of -2.8°C (27°F) and a low of -8.2°C (17.2°F).
January and February, with an average relative humidity of 88%, are most humid months in London.
Throughout the year, there are 128.1 rainfall days, and 346mm (13.62") of precipitation is accumulated.
Months with snowfall in London, Canada, are January through May, October through December.
The month with the most snowfall in London, Canada, is January, when snow falls for 17.8 days and typically aggregates up to 71mm (2.8") of snow.
Throughout the year, in London, there are 68.4 snowfall days, and 277mm (10.91") of snow is accumulated.
January has the least sunshine of the year in London, with an average of 2.3h of sunshine.
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in London, Canada.
The month with the least rainfall in London is March, when the rain falls for 9.3 days and typically collects 20mm (0.79") of precipitation.
On Sunday, 10. March 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends on Sunday, 03. November 2024, at 2:00 am, and the time zone reverts from EDT to EST.
April and May, with an average relative humidity of 75%, are the least humid months.
The months with the highest UV index in London are May through August, with an average maximum UV index of 5.
In London, snow does not fall in June through September.
With an average of 15h and 18min of daylight, June has the longest days of the year in London, Canada.
July, noted for its average high-temperature of 25.5°C (77.9°F) and an average low-temperature of 15.4°C (59.7°F), is considered the warmest month in London.
The month with the most rainfall is July, when the rain falls for 12.9 days and typically aggregates up to 45mm (1.77") of precipitation.
July has the most sunshine of the year, with an average of 10.1h of sunshine.
The month with the shortest days in London is December, with an average of 9h and 6min of daylight.
Average temperature
London, Canada
The warmest month (with the highest average high temperature) is July (25.5°C).
The month with the lowest average high temperature is January (-2.8°C).
The month with the highest average low temperature is July (15.4°C).
The coldest months (with the lowest average low temperature) are January and February (-8.2°C).
Average pressure
London, Canada
- Average pressure in January:
1017.7mbar - Average pressure in February:
1017.6mbar - Average pressure in March:
1018.7mbar - Average pressure in April:
1014.8mbar - Average pressure in May:
1015.4mbar - Average pressure in June:
1013.4mbar
- Average pressure in July:
1014.3mbar - Average pressure in August:
1014.9mbar - Average pressure in September:
1017.1mbar - Average pressure in October:
1015.7mbar - Average pressure in November:
1018.6mbar - Average pressure in December:
1017.8mbar
The month with the highest atmospheric pressure is March (1018.7mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).
Average wind speed
London, Canada
- Average wind speed in January:
17.9km/h - Average wind speed in February:
17.3km/h - Average wind speed in March:
16.5km/h - Average wind speed in April:
16.7km/h - Average wind speed in May:
13.3km/h - Average wind speed in June:
11.9km/h
- Average wind speed in July:
10.4km/h - Average wind speed in August:
10.9km/h - Average wind speed in September:
11.8km/h - Average wind speed in October:
14.9km/h - Average wind speed in November:
16.2km/h - Average wind speed in December:
17.1km/h
The windiest month (with the highest average wind speed) is January (17.9km/h).
The calmest month (with the lowest average wind speed) is July (10.4km/h).
Average humidity
London, Canada
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall
London, Canada
The wettest month (with the highest rainfall) is July (45mm).
The driest month (with the least rainfall) is March (20mm).
Average rainfall days
London, Canada
- Average rainfall days in January:
5.7 days - Average rainfall days in February:
5.7 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
14.1 days - Average rainfall days in June:
12.2 days
- Average rainfall days in July:
12.9 days - Average rainfall days in August:
13 days - Average rainfall days in September:
10.6 days - Average rainfall days in October:
13.9 days - Average rainfall days in November:
9.4 days - Average rainfall days in December:
8 days
The month with the highest number of rainy days is May (14.1 days).
The months with the least rainy days are January and February (5.7 days).
Average snowfall
London, Canada
The month with the highest snowfall is January (71mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days
London, Canada
- Average snowfall days in January:
17.8 days - Average snowfall days in February:
15.2 days - Average snowfall days in March:
9.3 days - Average snowfall days in April:
3.8 days - Average snowfall days in May:
0.4 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:
0.5 days - Average snowfall days in November:
7 days - Average snowfall days in December:
14.4 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
London, Canada
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
2h and 18min - Average sunshine in February:
3h and 0min - Average sunshine in March:
5h and 6min - Average sunshine in April:
6h and 54min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
9h and 42min - Average sunshine in September:
8h and 6min - Average sunshine in October:
4h and 48min - Average sunshine in November:
4h and 6min - Average sunshine in December:
2h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days
London, Canada
- Average sunshine days in January:
9.3 days - Average sunshine days in February:
9.8 days - Average sunshine days in March:
13.7 days - Average sunshine days in April:
12 days - Average sunshine days in May:
14.2 days - Average sunshine days in June:
15 days
- Average sunshine days in July:
14.5 days - Average sunshine days in August:
14.4 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
13.9 days - Average sunshine days in November:
13.9 days - Average sunshine days in December:
10.6 days
The month with the most sunshine days is September (16.1 days).
The month with the least sunshine days is January (9.3 days).
Average UV index
London, Canada
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover
London, Canada
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility
London, Canada
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January and February (8km).
