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Saint Catharines Weather in September
Saint Catharines in September averages 22°C (72°F) during the day and 16°C (61°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Saint Catharines in September
Typically, you can expect about 10 days of rain this month, with 93 mm (3.7 in) on average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Saint Catharines in September
September in Saint Catharines is generally excellent, with days reaching 22°C (72°F) and nights settling around 16°C (61°F). Overall, the month follows a fairly predictable daily temperature pattern. At 16°C (61°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Saint Catharines in September
Expect a lot of sunshine this month, with about 206 hours of sun. These sunny conditions add to the overall experience.Our weather planner can help you find worldwide destinations with pleasant weather during this period. July, August and September typically offer the best weather for Saint Catharines.
Saint Catharines Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
22°C (72°F)
Chance of Rain
34%
Precipitation
93 mm (3.7 in)
Rainy days
10 days
Humidity
74% *
Sunshine
206 hours *
Percentage Sunshine
55% *
* Data from: Buffalo, the United States of America (42 KM, 26 Miles).
Saint Catharines Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Saint Catharines - and find the best time to visit.
Best Places in Canada in September
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Saint Catharines in September
For Saint Catharines in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Saint Catharines in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Barbeque8/10 -
Camping8/10 -
Outdoor sports9/10
Saint Catharines 3-Day Forecast
More climate data for Saint Catharines
Temperature Rainfall Sunshine Humidity
See the full Saint Catharines climate overview or explore weather in Canada.
Popular in September
Where to go in September - average daytime high across popular destinations.
Toronto
22°C (72°F) Niagara Falls23°C (73°F) Montréal
22°C (72°F) Ottawa22°C (72°F) Quebec City
20°C (68°F) Vancouver19°C (66°F) Calgary19°C (66°F) Whistler15°C (59°F) Bucket list
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