London (Ontario) weather by month & the best time to visit
Canada · city break · hot-summer continental climate
The best time to visit London (Ontario) is August — its sunniest month (Sunshine Score 80/100), with June and September close behind. London (Ontario) averages about 1,973 hours of sunshine a year. Daytime highs around 27°C / 81°F and roughly 55 mm of rain in August.
When is the best time to visit London (Ontario)?
For sunshine, the best time to visit London (Ontario) is August, then June and September. The dullest month is January (0/100, 40 mm of rain). The full month-by-month picture is in the table below.
How sunny is London (Ontario)?
London (Ontario) gets a moderate 1,973 hours of sunshine a year. 80 Sunshine Score points separate August (80) from January (0), so the month you pick matters. It ranks #143 of 242 destinations in Canada for annual sunshine, below the national median of 2,024 hours. The year's 661 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | -2° / 28°F | -8° / 18°F | 40 mm | 1 |
| February | 0 | -1° / 30°F | -9° / 16°F | 38 mm | 2 |
| March | 0 | 5° / 41°F | -4° / 25°F | 43 mm | 3 |
| April | 27 | 12° / 54°F | 1° / 34°F | 56 mm | 4 |
| May | 72 | 19° / 66°F | 7° / 45°F | 66 mm | 6 |
| June | 78 | 25° / 77°F | 13° / 55°F | 68 mm | 7 |
| July | 77 | 28° / 82°F | 17° / 63°F | 70 mm | 7 |
| August | 80 | 27° / 81°F | 16° / 61°F | 55 mm | 6 |
| September | 78 | 23° / 73°F | 12° / 54°F | 69 mm | 5 |
| October | 46 | 15° / 59°F | 6° / 43°F | 62 mm | 3 |
| November | 0 | 8° / 46°F | 0° / 32°F | 50 mm | 1 |
| December | 0 | 1° / 34°F | -4° / 25°F | 44 mm | 1 |
Nearest destinations
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London (Ontario): questions and answers
What kind of destination is London (Ontario)?
London (Ontario) is a city break in Canada with a hot-summer continental climate.
How many hours of sunshine does London (Ontario) get a year?
London (Ontario) gets about 1,973 hours of sunshine a year, at its best around August.
When is the best time to visit London (Ontario)?
The sunniest time to visit London (Ontario) is August, when the Sunshine Score peaks at 80/100 (with June and September close behind). Expect daytime highs around 27°C / 81°F.
What is the least sunny month in London (Ontario)?
January is the least sunny month in London (Ontario), scoring 0/100 with about 40 mm of rain.
How strong is the sun in London (Ontario)?
The typical midday UV index in London (Ontario) peaks around 7 (high) in June, easing to about 1 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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