Annual mean 10°C · wettest around April · prevailing wind W
Warmest
25.1 °C
Coldest
-2.2 °C
Wettest
19%
Windiest
4.5 m/s
Prevailing
W
3.7 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in St. Catharines over the whole year is 10°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -3°C. St. Catharines has no sharply defined rainy season: the chance of rain on a given day runs from 9% in July, the driest month, to 17% in April, the wettest. Winds in St. Catharines are highest in February, averaging 3.8 m/s (14 km/h), and lightest in July, at 2.4 m/s (9 km/h). The prevailing wind is from the W. The clearest skies in St. Catharines come in July, when the sky is typically 38% covered; January is the cloudiest month, at 70%.
Month by month St. Catharines climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-2°C
-3°C
-8°C
14%
70%
3.7 m/s
0
0
1
February
-0°C
-3°C
-7°C
15%
62%
3.8 m/s
0
0
3
March
3°C
0°C
-2°C
14%
54%
3.7 m/s
1
0
10
April
9°C
4°C
4°C
17%
52%
3.3 m/s
7
0
31
May
16°C
11°C
13°C
13%
46%
2.7 m/s
37
7
64
June
22°C
17°C
20°C
12%
41%
2.7 m/s
70
22
63
July
25°C
20°C
25°C
9%
38%
2.4 m/s
70
51
34
August
24°C
19°C
24°C
10%
40%
2.5 m/s
72
48
38
September
21°C
16°C
20°C
10%
41%
2.5 m/s
69
21
65
October
14°C
10°C
11°C
16%
52%
3.1 m/s
30
2
61
November
7°C
4°C
2°C
15%
59%
3.5 m/s
4
0
22
December
2°C
0°C
-4°C
16%
69%
3.6 m/s
0
0
4
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short St. Catharines weather by season
Year round, St. Catharines has days of about -2°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -3°C to 20°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around April and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
St. Catharines weather in winterDecember to February
High -0°CLow -2°CRain 15%
Winter in St. Catharines has typical daily highs of about -0°C and lows of about -2°C, with a 15% chance of rain on a given day.
St. Catharines weather in springMarch to May
High 9°CLow 5°CRain 14%
Spring in St. Catharines has typical daily highs of about 9°C and lows of about 5°C, with a 14% chance of rain on a given day.
St. Catharines weather in summerJune to August
High 24°CLow 18°CRain 10%
Summer in St. Catharines has typical daily highs of about 24°C and lows of about 18°C, with a 10% chance of rain on a given day.
St. Catharines weather in autumnSeptember to November
High 14°CLow 10°CRain 13%
Autumn in St. Catharines has typical daily highs of about 14°C and lows of about 10°C, with a 13% chance of rain on a given day.
When is the rainy season in St. Catharines?
St. Catharines has no sharply defined rainy season: the chance of rain on a given day runs from 9% in July, the driest month, to 17% in April, the wettest.
What time of year is St. Catharines windiest?
Winds in St. Catharines are highest in February, averaging 3.8 m/s (14 km/h), and lightest in July, at 2.4 m/s (9 km/h). The prevailing wind is from the W.
What is the average temperature in St. Catharines year round?
The average temperature in St. Catharines over the whole year is 10°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -3°C.