Weather for the next 7 days in Sarnia, an urban area in Ontario, Canada.

Weather in Sarnia for today, Friday, 17 Jul 2026

Sunrise: 06:01
Sunset: 21:01
Moonrise: 09:52
Moonset: 23:02
UV Index: 2

02:00

05:00

08:00

11:00

14:00

17:00

20:00

23:00

Clear

Sunny

Smoky haze

Sunny

Clear

Temperature

18°C

19°C

22°C

27°C

30°C

29°C

25°C

19°C

Feels Like

18°C

19°C

22°C

27°C

29°C

26°C

19°C

Precipitation

0 mm

Probability

3 %

2 %

4 %

1 %

3 %

13 %

Cloud Cover

12 %

9 %

24 %

12 %

13 %

8 %

11 %

5 %

Wind Speed

6 km/h

5 km/h

8 km/h

15 km/h

19 km/h

14 km/h

11 km/h

Wind Direction

NNW

WNW

WSW

SSW

Wind Gusts

12 km/h

10 km/h

9 km/h

17 km/h

22 km/h

23 km/h

Humidity

52 %

50 %

53 %

37 %

36 %

42 %

53 %

90 %

Dew Point

8°C

12°C

11°C

13°C

15°C

17°C

00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23

Weather in Sarnia for tomorrow, Saturday, 18 Jul 2026

Sunrise: 06:02
Sunset: 21:00
Moonrise: 11:04
Moonset: 23:22
UV Index: 6

02:00

05:00

08:00

11:00

14:00

17:00

20:00

23:00

Patchy rain nearby

Mist

Fog

Cloudy

Patchy rain nearby

Light rain shower

Moderate or heavy rain shower

Partly Cloudy

Temperature

18°C

19°C

21°C

22°C

30°C

28°C

25°C

20°C

Feels Like

18°C

19°C

21°C

25°C

32°C

30°C

27°C

20°C

Precipitation

0.2 mm

0 mm

0.1 mm

0 mm

1.2 mm

3.8 mm

0 mm

Probability

42 %

37 %

54 %

30 %

8 %

57 %

78 %

23 %

Cloud Cover

72 %

99 %

100 %

85 %

61 %

69 %

74 %

53 %

Wind Speed

11 km/h

10 km/h

15 km/h

17 km/h

22 km/h

19 km/h

14 km/h

Wind Direction

SSW

WNW

Wind Gusts

23 km/h

21 km/h

17 km/h

23 km/h

27 km/h

39 km/h

40 km/h

27 km/h

Humidity

93 %

94 %

98 %

96 %

56 %

68 %

84 %

97 %

Dew Point

17°C

18°C

20°C

22°C

20°C

21°C

22°C

20°C

00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23

Weather in Sarnia for Sunday, 19 Jul 2026

Sunrise: 06:03
Sunset: 20:59
Moonrise: 12:13
Moonset: 23:42
UV Index: 7

02:00

05:00

08:00

11:00

14:00

17:00

20:00

23:00

Patchy rain nearby

Overcast

Patchy rain nearby

Partly Cloudy

Patchy rain nearby

Clear

Temperature

20°C

19°C

18°C

23°C

26°C

27°C

22°C

17°C

Feels Like

20°C

19°C

18°C

25°C

27°C

25°C

17°C

Precipitation

0 mm

Probability

25 %

34 %

31 %

15 %

6 %

5 %

19 %

15 %

Cloud Cover

63 %

100 %

80 %

44 %

53 %

73 %

5 %

Wind Speed

17 km/h

15 km/h

14 km/h

6 km/h

11 km/h

8 km/h

Wind Direction

NNW

NNE

WSW

Wind Gusts

32 km/h

24 km/h

23 km/h

18 km/h

17 km/h

7 km/h

17 km/h

16 km/h

Humidity

96 %

92 %

69 %

56 %

50 %

77 %

92 %

Dew Point

19°C

17°C

16°C

18°C

16°C

00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23

Weather in Sarnia for Monday, 20 Jul 2026

Sunrise: 06:04
Sunset: 20:58
Moonrise: 13:21
Moonset: 19:00
UV Index: 7

02:00

05:00

08:00

11:00

14:00

17:00

20:00

23:00

Mist

Partly Cloudy

Overcast

Partly Cloudy

Sunny

Light rain shower

Temperature

17°C

20°C

23°C

26°C

28°C

25°C

21°C

Feels Like

17°C

20°C

25°C

27°C

29°C

26°C

21°C

Precipitation

0 mm

0.3 mm

Probability

23 %

16 %

20 %

9 %

3 %

7 %

50 %

Cloud Cover

29 %

34 %

100 %

63 %

19 %

23 %

86 %

Wind Speed

9 km/h

8 km/h

10 km/h

17 km/h

22 km/h

27 km/h

26 km/h

24 km/h

Wind Direction

SSW

WSW

Wind Gusts

20 km/h

16 km/h

14 km/h

20 km/h

26 km/h

31 km/h

38 km/h

37 km/h

Humidity

95 %

96 %

89 %

73 %

61 %

54 %

70 %

95 %

Dew Point

17°C

18°C

19°C

20°C

00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23

Weather in Sarnia for Tuesday, 21 Jul 2026

Sunrise: 06:05
Sunset: 20:57
Moonrise: 14:27
Moonset: 00:02
UV Index: 5

02:00

05:00

08:00

11:00

14:00

17:00

20:00

23:00

Light rain shower

Clear

Sunny

Patchy rain nearby

Clear

Temperature

14°C

12°C

15°C

20°C

19°C

17°C

15°C

Feels Like

12°C

10°C

14°C

20°C

19°C

17°C

14°C

Precipitation

0.4 mm

0 mm

0.1 mm

0 mm

Probability

56 %

12 %

9 %

3 %

12 %

13 %

20 %

10 %

Cloud Cover

99 %

0 %

5 %

21 %

85 %

89 %

75 %

24 %

Wind Speed

26 km/h

20 km/h

17 km/h

31 km/h

24 km/h

17 km/h

Wind Direction

NNW

WNW

NNW

Wind Gusts

39 km/h

37 km/h

25 km/h

35 km/h

29 km/h

36 km/h

28 km/h

Humidity

91 %

87 %

79 %

53 %

57 %

58 %

72 %

76 %

Dew Point

13°C

10°C

11°C

10°C

12°C

11°C

00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23

Weather in Sarnia for Wednesday, 22 Jul 2026

Sunrise: 06:06
Sunset: 20:56
Moonrise: 15:33
Moonset: 00:25
UV Index: 6

02:00

05:00

08:00

11:00

14:00

17:00

20:00

23:00

Clear

Sunny

Partly Cloudy

Sunny

Clear

Temperature

11°C

15°C

21°C

23°C

19°C

15°C

Feels Like

11°C

10°C

15°C

21°C

24°C

19°C

15°C

Precipitation

0 mm

Probability

11 %

13 %

8 %

3 %

2 %

1 %

3 %

6 %

Cloud Cover

11 %

15 %

7 %

16 %

29 %

16 %

2 %

7 %

Wind Speed

9 km/h

12 km/h

17 km/h

19 km/h

17 km/h

5 km/h

10 km/h

Wind Direction

NNW

WSW

WNW

Wind Gusts

18 km/h

20 km/h

19 km/h

22 km/h

19 km/h

9 km/h

20 km/h

Humidity

84 %

86 %

75 %

49 %

39 %

38 %

57 %

68 %

Dew Point

9°C

11°C

10°C

9°C

8°C

11°C

9°C

00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23

Weather in Sarnia for Thursday, 23 Jul 2026

Sunrise: 06:07
Sunset: 20:56
Moonrise: 16:38
Moonset: 00:53
UV Index: 6

02:00

05:00

08:00

11:00

14:00

17:00

20:00

23:00

Clear

Sunny

Cloudy

Light rain shower

Patchy rain nearby

Partly Cloudy

Temperature

14°C

15°C

19°C

24°C

23°C

22°C

19°C

Feels Like

14°C

19°C

25°C

22°C

19°C

Precipitation

0 mm

0.2 mm

0.1 mm

0 mm

Probability

7 %

6 %

5 %

7 %

17 %

13 %

10 %

Cloud Cover

8 %

9 %

6 %

72 %

50 %

68 %

82 %

46 %

Wind Speed

8 km/h

9 km/h

10 km/h

17 km/h

19 km/h

22 km/h

14 km/h

7 km/h

Wind Direction

SSW

Wind Gusts

17 km/h

20 km/h

18 km/h

20 km/h

23 km/h

27 km/h

21 km/h

14 km/h

Humidity

73 %

69 %

67 %

49 %

54 %

58 %

70 %

Dew Point

9°C

12°C

14°C

13°C

00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23

Weather forecast interval

• Sarnia - 7 days
• Sarnia - 15 days

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Weather for the next 7 days in Sarnia, an urban area in Ontario, Canada.

Weather in Sarnia for today, Friday, 17 Jul 2026

Weather in Sarnia for tomorrow, Saturday, 18 Jul 2026

Weather in Sarnia for Sunday, 19 Jul 2026

Weather in Sarnia for Monday, 20 Jul 2026

Weather in Sarnia for Tuesday, 21 Jul 2026

Weather in Sarnia for Wednesday, 22 Jul 2026

Weather in Sarnia for Thursday, 23 Jul 2026

Weather forecast interval

Major cities in Ontario

Provinces in Canada

Hourly Weather Forecast

Daily Weather Forecast