Env. Canada, European, American side by side around St. Catharines and nearby towns.Live rain radar →
Loading the three model maps…
Next 14 hours
consensus of the three models
7-day forecast
where the models agree, and where they split
St. Catharines, 08 is at its warmest in Jul (average highs near 27°C) and coldest in Feb (lows around -3°C), with roughly 1000 mm of precipitation across the year. Below, compare what Env. Canada, European, American forecast for St. Catharines right now, and see exactly where they disagree.
St. Catharines climate by month
average daytime high and overnight low across a typical year
Jan
2°
-2°
Feb
5°
-3°
Mar
7°
0°
Apr
13°
5°
May
19°
10°
Jun
23°
16°
Jul
27°
19°
Aug
25°
18°
Sep
22°
16°
Oct
17°
11°
Nov
10°
4°
Dec
5°
0°
Common questions
What's the weather in St. Catharines today?
On this page we show what Env. Canada, European, American each forecast for St. Catharines today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in St. Catharines today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from Env. Canada, European, American for St. Catharines and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for St. Catharines?
No single model is always right. Env. Canada, European, American each run their own physics, so we line all three up: when they agree the St. Catharines forecast is reliable, and when they split you should expect surprises. See our tested CA accuracy scoreboard for how the models compare.
What is the warmest month in St. Catharines?
Jul is typically the warmest month in St. Catharines, with average highs around 27°C.
How cold does St. Catharines get?
The coldest month in St. Catharines is Feb, when overnight lows average about -3°C.
How much rain does St. Catharines get?
St. Catharines sees roughly 1000 mm of precipitation a year, with Apr usually the wettest month.
The forecasts Canadians check
Environment Canada runs the national GEM model as open data, so it sits right in the comparison above. The Weather Network and AccuWeather keep theirs closed, so we link you to them.