St. Catharines WeatherThursday, October 15, 2026

Wednesday
Oct 14
16.6°aft. high
12a 18° —
1a 18.5° —
2a 17.3° —
3a 16.6° 1%
4a 16.2° 1%
5a 16.2° 2%
6a 15.7° 9%
7a 15.3° 17%
8a 14.7° 22%
9a 15.8° 6%
10a 17.1° 1%
11a 17.2° —
12p 16.5° —
1p 16.6° —
2p 16.6° —
3p 16.1° —
4p 16° —
5p 15.3° —
6p 15° —
7p 14.6° —
8p 14.1° —
9p 13.7° —
10p 13.7° —
11p 13.2° —
Today
Oct 15
14.5°aft. high
12a 13° —
1a 12.7° —
2a 12.4° —
3a 12° —
4a 11.7° —
5a 11.6° —
6a 11.5° 1%
7a 11° —
8a 10.6° —
9a 11.2° —
10a 11.2° —
11a 11.6° —
12p 12.9° —
1p 13.7° —
2p 14.2° —
3p 14.5° 1%
4p 14.1° 1%
5p 13.2° 2%
6p 11.8° 3%
7p 11.2° 3%
8p 11.7° 4%
9p 11.8° 4%
10p 11.4° 19%
11p 11.4° 36%
Friday
Oct 16
18.5°aft. high
12a 11.9° 45%
1a 12.7° 66%
2a 13.8° 57%
3a 16.5° 63%
4a 18.3° 57%
5a 19.3° 53%
6a 19.5° 39%
7a 19.7° 26%
8a 19.9° 23%
9a 20° 28%
10a 19.3° 29%
11a 18.5° 68%
12p 18.5° 68%
1p 17.5° 68%
2p 16.8° 32%
3p 15.3° 32%
4p 11.7° 32%
5p 10.5° 32%
6p 9.6° 32%
7p 9° 32%
8p 8.8° 9%
9p 8.1° 9%
10p 7.7° 9%
11p 7.4° 9%
Saturday
Oct 17
9.1°aft. high
12a 7.2° 9%
1a 7.1° 9%
2a 7.1° 3%
3a 6.6° 3%
4a 5.7° 3%
5a 4.9° 3%
6a 4.5° 3%
7a 4.3° 3%
8a 4.3° —
9a 4.6° —
10a 5° —
11a 5.7° —
12p 6.4° —
1p 7° —
2p 7.8° —
3p 8.6° —
4p 9.1° —
5p 8.7° —
6p 7.5° —
7p 6.8° —
8p 6.1° —
9p 5.6° —
10p 5.2° —
11p 5° —
Sunday
Oct 18
15°aft. high
12a 5.5° —
1a 5.7° —
2a 5.7° —
3a 6.2° —
4a 6.5° —
5a 6.1° —
6a 5.2° —
7a 5.2° —
8a 7.7° —
9a 10.9° —
10a 13.7° —
11a 13.9° —
12p 14.3° —
1p 14.6° —
2p 15° —
3p 14.8° —
4p 14.2° —
5p 13.2° —
6p 12.2° —
7p 11.5° —
8p 11.2° 1%
9p 12° 1%
10p 12.9° 1%
11p 12.7° 1%
Monday
Oct 19
17.4°aft. high
12a 12.4° 1%
1a 12.1° 1%
2a 11.9° 2%
3a 11.8° 2%
4a 11.7° 2%
5a 11.6° 2%
6a 11.4° 2%
7a 11.5° 2%
8a 12.8° 2%
9a 14.4° 2%
10a 15.6° 2%
11a 16.2° 2%
12p 16.8° 2%
1p 17.2° 2%
2p 17.4° 3%
3p 17.3° 3%
4p 17° 3%
5p 16° 3%
6p 14.7° 3%
7p 13.7° 3%
8p 13.2° 1%
9p 13° 1%
10p 12.8° 1%
11p 12.6° 1%
Tuesday
Oct 20
17.8°aft. high
12a 12.4° 1%
1a 12.2° 1%
2a 12° —
3a 11.7° —
4a 11.5° —
5a 11.2° —
6a 11° —
7a 11.2° —
8a 12.1° —
9a 13.6° —
10a 14.9° —
11a 16° —
12p 17° —
1p 17.7° —
2p 17.8° —
3p 17.5° —
4p 17° —
5p 16° —
6p 14.6° —
7p 13.6° —
8p 13.2° —
9p 13° —
10p 12.9° —
11p 12.6° —