Regional Municipality of Niagara (St. Catharines)
May
Weather in Regional Municipality of Niagara for May 2026
Your guide to Regional Municipality of Niagara weather in May - trends and predictions
In general, the average temperature in Regional Municipality of Niagara at the beginning of May is 12.6 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 17.7 °C by the end of May.
The climate of Regional Municipality of Niagara in May is notably wet, with an average of 15 rainy days, and a total of 71.6 mm of precipitation.
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Temperatures
Rain 🌧️
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16
Dry days
15
Rainy days
0
Snow days
16°/9°
Temperatures
20 km/h
Avg max wind
77 %
Avg humidity
Regional Municipality of Niagara Weather May
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Temperatures trend during May in Regional Municipality of Niagara
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May weather in Regional Municipality of Niagara day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Patchy rain possible | 11° /5° | 9.6 mm | 3 | |
| 2 May |  Heavy rain at times | 12° /7° | 8.1 mm | 3 | |
| 3 May |  Moderate rain at times | 11° /5° | 3.6 mm | 3 | |
| 4 May | Patchy rain possible | 11° /6° | 8 mm | 3 | |
| 5 May |  Overcast | 13° /7° | 0.5 mm | 3 | |
| 6 May |  Sunny | 15° /8° | 3.4 mm | 4 | |
| 7 May | Heavy rain at times | 15° /7° | 2.1 mm | 3 | |
| 8 May | Overcast | 15° /7° | 2 mm | 3 | |
| 9 May | Moderate or heavy rain shower | 12° /6° | 2.8 mm | 3 | |
| 10 May |  Partly cloudy | 15° /5° | 0.1 mm | 4 | |
| 11 May | Overcast | 15° /6° | 1.9 mm | 4 | |
| 12 May | Sunny | 18° /7° | 0.1 mm | 5 | |
| 13 May | Partly cloudy | 18° /11° | 11.1 mm | 4 | |
| 14 May |  Cloudy | 16° /11° | 9.2 mm | 4 | |
| 15 May | Sunny | 18° /10° | 1 mm | 5 | |
| 16 May | Overcast | 19° /10° | 27.3 mm | 4 | |
| 17 May | Sunny | 16° /9° | 5 mm | 4 | |
| 18 May | Sunny | 15° /8° | 0.1 mm | 4 | |
| 19 May | Overcast | 17° /9° | 0.7 mm | 4 | |
| 20 May | Moderate or heavy rain shower | 16° /9° | 10.9 mm | 4 | |
| 21 May | Sunny | 18° /10° | 11.9 mm | 5 | |
| 22 May | Partly cloudy | 17° /11° | 20.4 mm | 4 | |
| 23 May | Cloudy | 17° /10° | 0.1 mm | 4 | |
| 24 May | Moderate rain at times | 17° /9° | 0.4 mm | 4 | |
| 25 May | Sunny | 16° /8° | 3 mm | 4 | |
| 26 May | Sunny | 17° /8° | 0 mm | 5 | |
| 27 May | Sunny | 18° /10° | 1.3 mm | 4 | |
| 28 May | Sunny | 18° /11° | 1 mm | 4 | |
| 29 May | Sunny | 17° /11° | 13.6 mm | 4 | |
| 30 May | Sunny | 19° /11° | 0 mm | 5 | |
| 31 May | Sunny | 19° /11° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Regional Municipality of Niagara 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 Niagara forecast closer to your planned date for the most up-to-date weather information.
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Regional Municipality of Niagara in May - FAQ
What are the expected maximum and minimum temperatures in Regional Municipality of Niagara during May?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Regional Municipality of Niagara during May?
Moderate rainfall is anticipated in Regional Municipality of Niagara during May, with a total of 71.6 mm spread over approximately 15 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Regional Municipality of Niagara during May?
The average wind speed in Regional Municipality of Niagara during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Regional Municipality of Niagara
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