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Regional Municipality of Waterloo (Kitchener)
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Weather in Regional Municipality of Waterloo for May 2026

Your guide to Regional Municipality of Waterloo weather in May - trends and predictions

    Official Weather Alert ⚠️

  • Frost Warning - See hour by hour.

    • Temperatures

  • Until now, May 2026 in Regional Municipality of Waterloo is cooler than usual, with temperatures averaging 11.3 °C, this is -2.9 °C below the typical seasonal average.

  • The forecast for the next days in Regional Municipality of Waterloo predicts temperatures to be around 15 °C, close to the historical average.

  • In general, the average temperature in Regional Municipality of Waterloo at the beginning of May is 13.7 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 19.4 °C by the end of May.

    • Rain 🌧️

  • Regional Municipality of Waterloo experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 137.1 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
10
Dry days
Average rainy days
21
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/7°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Regional Municipality of Waterloo Weather May

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

Temperatures trend during May in Regional Municipality of Waterloo

See the weather trend as well as the moving average line

May weather in Regional Municipality of Waterloo day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
1 May Heavy rain at times
Heavy rain at times
 11° /3° 15.3 mm 4
2 May Moderate rain at times
Moderate rain at times
 11° /3° 1.9 mm 4
3 May Moderate rain at times
Moderate rain at times
 13° /3° 2.1 mm 4
4 May Patchy rain possible
Patchy rain possible
 15° /6° 2.2 mm 4
5 May Patchy rain possible
Patchy rain possible
 14° /7° 0.3 mm 4
6 May Cloudy
Cloudy
 16° /5° 9.8 mm 5
7 May Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /5° 2.4 mm 5
8 May Cloudy
Cloudy
 16° /6° 0.3 mm 4
9 May Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /4° 3.1 mm 4
10 May Partly cloudy
Partly cloudy
 16° /4° 0.5 mm 6
11 May Sunny
Sunny
 12° /2° 0 mm 6.2
12 May Moderate rain
Moderate rain
 13° /0° 5.1 mm 6
13 May Moderate rain
Moderate rain
 11° /5° 6.8 mm 3.7
14 May Patchy rain possible
Patchy rain possible
 9° /3° 0.2 mm 2.3
15 May Moderate rain
Moderate rain
 12° /2° 5.6 mm 0.7
16 May Partly cloudy
Partly cloudy
 13° /1° 0 mm 3
17 May Patchy rain possible
Patchy rain possible
 20° /7° 1 mm 3
18 May Overcast
Overcast
 13° /8° 0 mm 3
19 May Moderate rain
Moderate rain
 19° /9° 5 mm 3
20 May Patchy rain possible
Patchy rain possible
 17° /10° 4.6 mm 4
21 May Mist
Mist
 18° /8° 0.1 mm 3
22 May Patchy rain possible
Patchy rain possible
 20° /8° 0.5 mm 3
23 May Partly cloudy
Partly cloudy
 15° /4° 0 mm 4
24 May Patchy rain possible
Patchy rain possible
 20° /12° 3.9 mm 4
25 May Sunny
Sunny
 18° /5° 0.9 mm 4
26 May Sunny
Sunny
 20° /6° 0 mm 5
27 May Sunny
Sunny
 20° /9° 1.1 mm 5
28 May Sunny
Sunny
 18° /10° 0.8 mm 5
29 May Sunny
Sunny
 19° /8° 12.6 mm 4
30 May Sunny
Sunny
 21° /9° 0 mm 5
31 May Sunny
Sunny
 20° /8° 3.8 mm 5
Next
Important Notice
Our weather forecast for Regional Municipality of Waterloo 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 Regional Municipality of Waterloo forecast closer to your planned date for the most up-to-date weather information.
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Regional Municipality of Waterloo in May - FAQ

What are the expected maximum and minimum temperatures in Regional Municipality of Waterloo during May?

Enjoy moderate daytime temperatures of up to 17° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Regional Municipality of Waterloo during May?

Significant rainfall exceeding 137.1 mm is expected in Regional Municipality of Waterloo during May, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Regional Municipality of Waterloo during May?

The average wind speed in Regional Municipality of Waterloo during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in Regional Municipality of Waterloo

Explore the daily rainfall trends and prepare for Regional Municipality of Waterloos May weather 💧
Typically, Regional Municipality of Waterloo has 21 rainy days in May with a total of 137.1 mm of rainfall.

UV exposure in Regional Municipality of Waterloo during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Location coordinates Where is Regional Municipality of Waterloo?

Get accurate weather forecasts for Regional Municipality of Waterloo, located at latitude 43.425 and longitude -80.511. Stay updated with localized weather information tailored for Regional Municipality of Waterloo.

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