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Weather in Sarnia for May 2027

Your guide to Sarnia weather in May - trends and predictions

    Temperatures

  • In general, the average temperature in Sarnia at the beginning of May is 12.4 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 17.8 °C by the end of May.

    • Rain 🌧️

  • Sarnia experiences moderate rainfall in May, with an average of 10 rainy days and a total precipitation of 128.7 mm.

    • More

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

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

Average dry days
21
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/8°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Sarnia Weather May

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

Temperatures trend during May in Sarnia

See the weather trend as well as the moving average line

May weather in Sarnia day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
1 May Light rain
Light rain
 12° /5° 5.4 mm 4
2 May Patchy rain possible
Patchy rain possible
 8° /4° 2.4 mm 4
3 May Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /4° 7.2 mm 4
4 May Light rain
Light rain
 14° /6° 7.3 mm 5
5 May Light rain
Light rain
 14° /6° 4.9 mm 4
6 May Light rain
Light rain
 13° /6° 3.7 mm 5
7 May Light rain
Light rain
 15° /6° 3.3 mm 5
8 May Overcast
Overcast
 14° /6° 0.1 mm 4
9 May Patchy rain possible
Patchy rain possible
 12° /6° 1.5 mm 4
10 May Overcast
Overcast
 15° /6° 0.4 mm 5
11 May Patchy rain possible
Patchy rain possible
 13° /6° 2.4 mm 5
12 May Patchy rain possible
Patchy rain possible
 17° /7° 1.1 mm 6
13 May Light rain
Light rain
 18° /10° 6.4 mm 4
14 May Light rain
Light rain
 14° /8° 4 mm 4
15 May Sunny
Sunny
 18° /8° 0 mm 6
16 May Light rain
Light rain
 22° /11° 6.6 mm 6
17 May Light rain
Light rain
 17° /10° 3 mm 5
18 May Sunny
Sunny
 19° /10° 0.9 mm 5
19 May Moderate or heavy rain shower
Moderate or heavy rain shower
 20° /11° 5.1 mm 5
20 May Light rain
Light rain
 17° /7° 3 mm 4
21 May Heavy rain
Heavy rain
 16° /11° 31.3 mm 4
22 May Light rain
Light rain
 18° /10° 6.4 mm 6
23 May Light rain
Light rain
 16° /10° 3.3 mm 4
24 May Overcast
Overcast
 16° /9° 0.6 mm 4
25 May Light rain
Light rain
 17° /9° 2.7 mm 6
26 May Sunny
Sunny
 19° /9° 0 mm 6
27 May Patchy rain possible
Patchy rain possible
 19° /10° 2.1 mm 6
28 May Sunny
Sunny
 15° /10° 0.2 mm 6
29 May Moderate rain
Moderate rain
 16° /9° 12.7 mm 6
30 May Sunny
Sunny
 17° /9° 0 mm 6
31 May Sunny
Sunny
 21° /9° 0.6 mm 6
Next
Important Notice
Our weather forecast for Sarnia in May 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 May - FAQ

What are the expected maximum and minimum temperatures in Sarnia during May?
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 May?
Significant rainfall exceeding 128.7 mm is expected in Sarnia during May, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Sarnia during May?
The average wind speed in Sarnia during May is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in Sarnia

Explore the daily rainfall trends and prepare for Sarnias May weather 💧
Typically, Sarnia has 10 rainy days in May with a total of 128.7 mm of rainfall.

UV exposure in Sarnia during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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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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