Home   Weather   Canada   Sarnia   Hour-by-hour
Flag for Canada

Hour-by-Hour Forecast for Sarnia, Ontario, Canada

Currently: 77 °F. Sunny. (Weather station: Sarnia Airport, Canada). See more current weather

Hour-by-hour Forecast in Sarnia — Graph

°F
Time
Wind
(mph)
Rain/Snow
()
Temp
(°F)
63
66
69
72
75
78
81
84
87
90
93
Thursday, August 7, 2025
9 pm
74
10
10 pm
69
10
11 pm
66
10
Friday, August 8, 2025
12 am
66
9
1 am
66
8
2 am
65
7
3 am
65
7
4 am
65
7
5 am
65
7
6 am
65
7
7 am
66
7
8 am
69
7
9 am
73
8
10 am
78
8
11 am
81
9
12 pm
83
10
1 pm
84
11
2 pm
84
12
3 pm
85
12
4 pm
85
11
5 pm
84
11
6 pm
84
11
7 pm
82
11
8 pm
80
12
9 pm
77
11
10 pm
73
11
11 pm
70
10
Saturday, August 9, 2025
12 am
70
10
1 am
70
10
2 am
69
10
3 am
69
10
4 am
70
9
5 am
69
8
6 am
69
9
7 am
70
9
8 am
72
9
9 am
76
10
10 am
79
11
11 am
82
12
12 pm
84
13
1 pm
85
14
2 pm
86
15
3 pm
87
14
4 pm
87
14
5 pm
87
14
6 pm
86
14
7 pm
84
14
8 pm
82
14
9 pm
79
13
10 pm
75
13
11 pm
73
13
Sunday, August 10, 2025
12 am
73
11
1 am
72
10
2 am
70
8
3 am
70
8
4 am
70
8
5 am
70
9
6 am
70
9
7 am
71
9
8 am
73
9
9 am
77
10
10 am
82
11
11 am
85
12
12 pm
87
12
1 pm
88
13
2 pm
90
14
3 pm
90
14
4 pm
91
14
5 pm
90
15
6 pm
90
13
7 pm
89
12
8 pm
85
10
9 pm
82
10
10 pm
77
10
11 pm
75
9
Monday, August 11, 2025
12 am
74
9
1 am
74
9
2 am
73
9
3 am
72
9
4 am
72
9
5 am
71
9
6 am
71
10
7 am
72
11
8 am
75
11
9 am
79
12
10 am
83
13
11 am
86
14
12 pm
88
14
1 pm
89
14
2 pm
91
15
3 pm
91
15
4 pm
91
15
5 pm
90
15
6 pm
89
13
7 pm
88
11
8 pm
85
9
9 pm
82
8
10 pm
78
7
11 pm
74
7
Tuesday, August 12, 2025
12 am
73
7
1 am
74
7
2 am
74
7
3 am
74
7
0.02
4 am
73
7
0.02
5 am
72
7
0.02
6 am
71
7
0.02
7 am
71
6
0.02
8 am
73
5
0.01
9 am
75
6
10 am
78
6
11 am
80
7
12 pm
83
8
1 pm
84
9
2 pm
86
10
3 pm
87
10
4 pm
87
10
5 pm
88
10
6 pm
85
8
0.01
7 pm
82
7
0.02
8 pm
80
6
0.01
9 pm
78
6
10 pm
76
6
11 pm
73
7
Wednesday, August 13, 2025
12 am
71
7
1 am
71
7
2 am
73
7
0.02
3 am
73
7
0.03
4 am
71
6
0.05
5 am
70
6
0.06
6 am
70
5
0.07
7 am
70
5
0.06
8 am
72
5
0.04
9 am
75
7
0.01
10 am
80
8
11 am
83
10
12 pm
86
11
1 pm
88
11
2 pm
89
11
3 pm
90
12
4 pm
91
12
5 pm
91
13
6 pm
89
12
7 pm
85
11
8 pm
82
10
9 pm
81
10
10 pm
79
9
11 pm
77
8
Thursday, August 14, 2025
12 am
76
7
0.01
1 am
76
7
0.02
2 am
74
6
0.02
3 am
73
6
0.01
4 am
74
7
0.01
5 am
73
7
0.02
6 am
73
7
0.02
7 am
72
6
0.02
8 am
73
5
0.02
9 am
74
6
10 am
77
6
11 am
79
7
12 pm
80
7
1 pm
82
6
Thu, Aug 7 at 9:00 pm
74 °F
Clear.
Feels Like: 76 °F
Humidity: 68%
Precipitation: Rain: 0 Snow: 0
Precipitation Chance: 0%
SSE
Wind: 10 mph

Detailed Hourly Forecast — Next 24 hours

Scroll right to see more
 ConditionsComfortPrecipitation
Time TempWeatherFeels LikeWind HumidityChanceAmount
9:00 pm
Thu, Aug 7
74 °FClear.76 °F10 mph68%0%0.00" (snow)
0.00" (rain)
10:00 pm69 °FScattered clouds.69 °F10 mph80%0%0.00" (snow)
0.00" (rain)
11:00 pm66 °FPartly cloudy.66 °F10 mph88%0%0.00" (snow)
0.00" (rain)
12:00 am
Fri, Aug 8
66 °FScattered clouds.66 °F9 mph88%0%0.00" (snow)
0.00" (rain)
1:00 am66 °FMostly clear.66 °F8 mph88%0%0.00" (snow)
0.00" (rain)
2:00 am65 °FClear.65 °F7 mph91%0%0.00" (snow)
0.00" (rain)
3:00 am65 °FClear.65 °F7 mph93%0%0.00" (snow)
0.00" (rain)
4:00 am65 °FClear.65 °F7 mph92%0%0.00" (snow)
0.00" (rain)
5:00 am65 °FClear.65 °F7 mph92%0%0.00" (snow)
0.00" (rain)
6:00 am65 °FClear.65 °F7 mph94%0%0.00" (snow)
0.00" (rain)
7:00 am66 °FMostly sunny.66 °F7 mph95%0%0.00" (snow)
0.00" (rain)
8:00 am69 °FScattered clouds.69 °F7 mph92%0%0.00" (snow)
0.00" (rain)
9:00 am72 °FScattered clouds.72 °F8 mph84%0%0.00" (snow)
0.00" (rain)
10:00 am78 °FBroken clouds.79 °F8 mph74%0%0.00" (snow)
0.00" (rain)
11:00 am81 °FOvercast.84 °F9 mph68%0%0.00" (snow)
0.00" (rain)
12:00 pm83 °FOvercast.86 °F10 mph64%0%0.00" (snow)
0.00" (rain)
1:00 pm84 °FOvercast.88 °F11 mph61%0%0.00" (snow)
0.00" (rain)
2:00 pm84 °FOvercast.88 °F12 mph58%0%0.00" (snow)
0.00" (rain)
3:00 pm85 °FCloudy.88 °F12 mph56%2%0.00" (snow)
0.00" (rain)
4:00 pm85 °FMostly cloudy.88 °F11 mph55%3%0.00" (snow)
0.00" (rain)
5:00 pm84 °FBroken clouds.87 °F11 mph56%5%0.00" (snow)
0.00" (rain)
6:00 pm84 °FThundershowers. Partly cloudy.87 °F11 mph57%14%0.00" (snow)
0.00" (rain)
7:00 pm82 °FBroken clouds.84 °F11 mph60%9%0.00" (snow)
0.00" (rain)
8:00 pm80 °FCloudy.82 °F12 mph65%0%0.00" (snow)
0.00" (rain)
* Updated Thursday, August 7, 2025 3:42:33 pm Sarnia time - Weather by CustomWeather, © 2025

14 days extended forecast