Waterloo
May
Weather in Waterloo for May 2026
Your guide to Waterloo weather in May - trends and predictions
In general, the average temperature in Waterloo at the beginning of May is 14.4 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 19.4 °C by the end of May.
Waterloo experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 137.1 mm.
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Temperatures
Rain 🌧️
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10
Dry days
21
Rainy days
0
Snow days
17°/7°
Temperatures
20 km/h
Avg max wind
74 %
Avg humidity
Waterloo Weather May
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Temperatures trend during May in Waterloo
See the weather trend as well as the moving average line
May weather in Waterloo day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Heavy rain at times | 12° /4° | 20.4 mm | 3 | |
| 2 May |  Moderate rain at times | 12° /4° | 2 mm | 3 | |
| 3 May | Moderate rain at times | 13° /4° | 2.3 mm | 3 | |
| 4 May |  Patchy rain possible | 14° /6° | 2.8 mm | 3 | |
| 5 May | Patchy rain possible | 15° /8° | 0.2 mm | 4 | |
| 6 May |  Cloudy | 17° /6° | 12.2 mm | 4 | |
| 7 May | Moderate or heavy rain shower | 18° /6° | 3 mm | 4 | |
| 8 May | Cloudy | 18° /7° | 0.2 mm | 4 | |
| 9 May | Moderate or heavy rain shower | 16° /4° | 2.4 mm | 4 | |
| 10 May |  Sunny | 18° /5° | 0.6 mm | 5 | |
| 11 May |  Overcast | 16° /6° | 1 mm | 4 | |
| 12 May |  Partly cloudy | 22° /7° | 0.2 mm | 5 | |
| 13 May | Overcast | 19° /11° | 5.1 mm | 5 | |
| 14 May | Overcast | 17° /9° | 6.1 mm | 4 | |
| 15 May | Sunny | 21° /8° | 1.8 mm | 5 | |
| 16 May | Overcast | 22° /10° | 3.9 mm | 5 | |
| 17 May | Sunny | 17° /7° | 6.7 mm | 4 | |
| 18 May | Sunny | 17° /6° | 0.8 mm | 4 | |
| 19 May | Overcast | 21° /7° | 2.1 mm | 5 | |
| 20 May | Heavy rain at times | 18° /7° | 7.9 mm | 4 | |
| 21 May | Sunny | 18° /10° | 21 mm | 4 | |
| 22 May | Overcast | 18° /10° | 11.2 mm | 4 | |
| 23 May | Overcast | 17° /7° | 3.7 mm | 4 | |
| 24 May | Patchy rain possible | 17° /7° | 0.1 mm | 4 | |
| 25 May | Sunny | 18° /5° | 0.9 mm | 4 | |
| 26 May | Sunny | 20° /6° | 0 mm | 5 | |
| 27 May | Sunny | 20° /9° | 1.1 mm | 5 | |
| 28 May | Sunny | 18° /10° | 0.8 mm | 5 | |
| 29 May | Sunny | 19° /8° | 12.6 mm | 4 | |
| 30 May | Sunny | 21° /9° | 0 mm | 5 | |
| 31 May | Sunny | 20° /8° | 3.8 mm | 5 | |
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Important Notice
Our weather forecast for 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 Waterloo forecast closer to your planned date for the most up-to-date weather information.
Change Month
Waterloo in May - FAQ
What are the expected maximum and minimum temperatures in 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 Waterloo during May?
Significant rainfall exceeding 137.1 mm is expected in 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 Waterloo during May?
The average wind speed in Waterloo during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Waterloo
Explore the daily rainfall trends and prepare for Waterloos May weather 💧
UV exposure in Waterloo during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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