Waterloo (Ontario) weather by month & the best time to visit
Canada · regional city · hot-summer continental climate
The best time to visit Waterloo (Ontario) is August — its sunniest month (Sunshine Score 79/100), with September and June close behind. Waterloo (Ontario) averages about 2,026 hours of sunshine a year. Daytime highs around 27°C / 81°F and roughly 63 mm of rain in August.
When is the best time to visit Waterloo (Ontario)?
For sunshine, the best time to visit Waterloo (Ontario) is August, then September and June. The dullest month is January (0/100, 50 mm of rain). The full month-by-month picture is in the table below.
How sunny is Waterloo (Ontario)?
Waterloo (Ontario) gets a moderate 2,026 hours of sunshine a year. 79 Sunshine Score points separate August (79) from January (0), so the month you pick matters. It ranks #121 of 242 destinations in Canada for annual sunshine, above the national median of 2,024 hours. The year's 763 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 | -3° / 27°F | -10° / 14°F | 50 mm | 1 |
| February | 0 | -2° / 28°F | -10° / 14°F | 47 mm | 2 |
| March | 0 | 4° / 39°F | -6° / 21°F | 51 mm | 3 |
| April | 19 | 11° / 52°F | 0° / 32°F | 69 mm | 4 |
| May | 71 | 19° / 66°F | 6° / 43°F | 73 mm | 6 |
| June | 77 | 24° / 75°F | 12° / 54°F | 73 mm | 7 |
| July | 76 | 28° / 82°F | 16° / 61°F | 77 mm | 7 |
| August | 79 | 27° / 81°F | 15° / 59°F | 63 mm | 6 |
| September | 78 | 23° / 73°F | 11° / 52°F | 70 mm | 5 |
| October | 38 | 14° / 57°F | 5° / 41°F | 74 mm | 3 |
| November | 0 | 7° / 45°F | -1° / 30°F | 62 mm | 1 |
| December | 0 | 0° / 32°F | -6° / 21°F | 54 mm | 1 |
Nearest destinations
Head-to-head
How Waterloo (Ontario) compares month by month: Waterloo (Ontario) vs Toronto · Waterloo (Ontario) vs Buffalo · Waterloo (Ontario) vs Rochester · all comparisons
Waterloo (Ontario): questions and answers
What kind of destination is Waterloo (Ontario)?
Waterloo (Ontario) is a regional city in Canada at 313 m elevation with a hot-summer continental climate.
How many hours of sunshine does Waterloo (Ontario) get a year?
Waterloo (Ontario) gets about 2,026 hours of sunshine a year, at its best around August.
When is the best time to visit Waterloo (Ontario)?
The sunniest time to visit Waterloo (Ontario) is August, when the Sunshine Score peaks at 79/100 (with September and June close behind). Expect daytime highs around 27°C / 81°F.
What is the least sunny month in Waterloo (Ontario)?
January is the least sunny month in Waterloo (Ontario), scoring 0/100 with about 50 mm of rain.
How strong is the sun in Waterloo (Ontario)?
The typical midday UV index in Waterloo (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.
Put the Waterloo (Ontario) sunshine badge on your site
A compact badge showing Waterloo (Ontario)'s sunshine at a glance — free to embed under CC BY 4.0. Paste this wherever you'd like it to appear:
Live preview — this is exactly what your readers see: