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Weather in Sarnia for October 2026

Your guide to Sarnia weather in October - trends and predictions

    Temperatures

  • So far, October 2026 in Sarnia is slightly warmer than the historical average by 0.7 °C.

  • The forecast for the coming days of October 2026 predicts a temperature of 17 °C , which is warmer than usual.

  • In general, the average temperature in Sarnia at the beginning of October is 21.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.3 °C by the end of October.

    • Rain 🌧️

  • Sarnia experiences moderate rainfall in October, with an average of 9 rainy days and a total precipitation of 95.5 mm.

    • More

  • Is October a good time to visit Sarnia? check out the best time to travel to Sarnia page.

  • ✨ Is October a good time to visit Sarnia? – Ask the AI Weatherman

Average dry days
22
Dry days
Average rainy days
9
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/8°
Temperatures
Average wind speed
24 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Sarnia Weather October

Move between months or click on a day
September
November
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light rain
21°
2
Light rain
21°
3
Fog
23°
4
Fog
24°
5
Sunny
22°
6
Light rain
21°
7
Light rain
18°
8
Cloudy
14°
9
Patchy rain possible
15°
10
Overcast
16°
11
Patchy rain possible
16°
12
Patchy rain possible
18°
13
Overcast
18°
14
Light rain
13°
15
Moderate rain
12°
16
Light rain
14°
17
Overcast
14°
18
Light rain
18°
19
Moderate rain
19°
20
Light rain shower
17°
21
Patchy rain possible
17°
22
Patchy rain possible
14°
23
Patchy rain possible
14°
24
Patchy rain possible
15°
25
Light drizzle
15°
26
Overcast
14°
27
Overcast
15°
28
Overcast
19°
29
Patchy rain possible
22°
30
Sunny
16°
31
Overcast
16°

Temperatures trend during October in Sarnia

See the weather trend as well as the moving average line

October weather in Sarnia day by day

Click on a date for more information
September November
Date Weather Temperatures Rain UV More
1 Oct. Light rain
Light rain
 21° /12° 5.2 mm 4
2 Oct. Light rain
Light rain
 21° /10° 6.3 mm 4
3 Oct. Fog
Fog
 23° /10° 0 mm 4.7
4 Oct. Fog
Fog
 24° /13° 0.8 mm 4.6
5 Oct. Sunny
Sunny
 22° /13° 0.4 mm 4.6
6 Oct. Light rain
Light rain
 21° /11° 3.1 mm 4.5
7 Oct. Light rain
Light rain
 18° /10° 2.9 mm 4
8 Oct. Cloudy
Cloudy
 14° /7° 0.2 mm 4
9 Oct. Patchy rain possible
Patchy rain possible
 15° /6° 0 mm 3
10 Oct. Overcast
Overcast
 16° /7° 0 mm 3
11 Oct. Patchy rain possible
Patchy rain possible
 16° /9° 0.7 mm 3
12 Oct. Patchy rain possible
Patchy rain possible
 18° /10° 0.5 mm 3
13 Oct. Overcast
Overcast
 18° /10° 0.8 mm 3
14 Oct. Light rain
Light rain
 13° /9° 7.7 mm 3
15 Oct. Moderate rain
Moderate rain
 12° /8° 12.8 mm 2
16 Oct. Light rain
Light rain
 14° /7° 2.7 mm 3
17 Oct. Overcast
Overcast
 14° /6° 0.5 mm 3
18 Oct. Light rain
Light rain
 18° /7° 7.6 mm 3.5
19 Oct. Moderate rain
Moderate rain
 19° /8° 23 mm 3.5
20 Oct. Light rain shower
Light rain shower
 17° /7° 0.5 mm 3.4
21 Oct. Patchy rain possible
Patchy rain possible
 17° /8° 2.3 mm 3.3
22 Oct. Patchy rain possible
Patchy rain possible
 14° /7° 1.2 mm 3
23 Oct. Patchy rain possible
Patchy rain possible
 14° /6° 0 mm 3
24 Oct. Patchy rain possible
Patchy rain possible
 15° /5° 0.1 mm 3
25 Oct. Light drizzle
Light drizzle
 15° /7° 0.9 mm 3
26 Oct. Overcast
Overcast
 14° /10° 0 mm 2.5
27 Oct. Overcast
Overcast
 15° /7° 0 mm 2.8
28 Oct. Overcast
Overcast
 19° /9° 0 mm 2.8
29 Oct. Patchy rain possible
Patchy rain possible
 22° /13° 1.4 mm 2.5
30 Oct. Sunny
Sunny
 16° /10° 0 mm 4
31 Oct. Overcast
Overcast
 16° /10° 0 mm 4
Next
Important Notice
Our weather forecast for Sarnia in October is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sarnia forecast closer to your planned date for the most up-to-date weather information.
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Sarnia in October - FAQ

What are the expected maximum and minimum temperatures in Sarnia during October?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Sarnia during October?
Moderate rainfall is anticipated in Sarnia during October, with a total of 95.5 mm spread over approximately 9 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Sarnia during October?
The average wind speed in Sarnia during October is 24 km/h, suggesting breezy to windy conditions, depending on your activities.

October rainfall patterns in Sarnia

Explore the daily rainfall trends and prepare for Sarnias October weather 💧
Typically, Sarnia has 9 rainy days in October with a total of 95.5 mm of rainfall.

UV exposure in Sarnia during October

Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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Get accurate weather forecasts for Sarnia, located at latitude 42.979 and longitude -82.404. Stay updated with localized weather information tailored for Sarnia.

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