Regional Municipality of Niagara (St. Catharines)
May
Weather in Regional Municipality of Niagara for May 2025
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 12.1 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 19.3 °C by the end of May.
With an average of 3 rainy days, Regional Municipality of Niagara experiences minimal rainfall in May.
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28
Dry days
3
Rainy days
0
Snow days
18°/8°
Temperatures
18 km/h
Avg max wind
77 %
Avg humidity
Regional Municipality of Niagara in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  11° | 2  10° | 3  12° | 4 12° | |||
| 5  12° | 6  15° | 7 13° | 8 18° | 9 12° | 10  14° | 11 15° |
| 12 17° | 13 17° | 14  13° | 15 17° | 16 17° | 17 14° | 18 16° |
| 19 18° | 20 17° | 21 21° | 22 20° | 23 20° | 24 18° | 25 17° |
| 26 18° | 27 20° | 28 20° | 29 19° | 30 19° | 31 22° |
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Temperatures trend during May in Regional Municipality of Niagara
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Patchy rain possible | 11° /5° | 0.5 mm | 3 | |
| 2 May | Heavy rain at times | 10° /5° | 3.2 mm | 3 | |
| 3 May | Moderate rain at times | 12° /6° | 5.4 mm | 3 | |
| 4 May | Patchy rain possible | 12° /7° | 0.8 mm | 3 | |
| 5 May | Overcast | 12° /7° | 0.8 mm | 3 | |
| 6 May | Sunny | 15° /7° | 0.1 mm | 5 | |
| 7 May | Heavy rain at times | 13° /7° | 3.2 mm | 3 | |
| 8 May | Overcast | 18° /9° | 1.1 mm | 4 | |
| 9 May | Moderate or heavy rain shower | 12° /8° | 4.2 mm | 3 | |
| 10 May | Partly cloudy | 14° /7° | 0.1 mm | 4 | |
| 11 May | Overcast | 15° /8° | 2.9 mm | 4 | |
| 12 May | Sunny | 17° /9° | 0.2 mm | 5 | |
| 13 May | Partly cloudy | 17° /10° | 5.9 mm | 5 | |
| 14 May | Cloudy | 13° /9° | 13.9 mm | 3 | |
| 15 May | Sunny | 17° /8° | 0 mm | 5 | |
| 16 May | Overcast | 17° /10° | 0 mm | 4 | |
| 17 May | Sunny | 14° /9° | 0.1 mm | 4 | |
| 18 May | Sunny | 16° /8° | 0.2 mm | 5 | |
| 19 May | Overcast | 18° /10° | 1.1 mm | 4 | |
| 20 May | Moderate or heavy rain shower | 17° /11° | 16.3 mm | 4 | |
| 21 May | Sunny | 21° /12° | 0.9 mm | 6 | |
| 22 May | Partly cloudy | 20° /12° | 2 mm | 5 | |
| 23 May | Cloudy | 20° /12° | 0.2 mm | 5 | |
| 24 May | Moderate rain at times | 18° /11° | 0.6 mm | 5 | |
| 25 May | Sunny | 17° /9° | 4.4 mm | 5 | |
| 26 May | Sunny | 18° /10° | 0 mm | 5 | |
| 27 May | Sunny | 20° /12° | 2 mm | 5 | |
| 28 May | Sunny | 20° /11° | 1.5 mm | 5 | |
| 29 May | Sunny | 19° /11° | 0 mm | 5 | |
| 30 May | Sunny | 19° /11° | 0 mm | 6 | |
| 31 May | Sunny | 22° /12° | 0 mm | 6 | |
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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.
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 18° and cooler nights around 8°. 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?
Significant rainfall exceeding 127.3 mm is expected in Regional Municipality of Niagara during May, occurring over more than 3 days. Preparing for wet conditions is recommended in your planning.
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 18 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Regional Municipality of Niagara
Explore the daily rainfall trends and prepare for Regional Municipality of Niagaras May weather 💧
UV exposure in Regional Municipality of Niagara during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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