Ottawa
May
Weather in Ottawa for May 2027
Your guide to Ottawa weather in May - trends and predictions
In general, the average temperature in Ottawa at the beginning of May is 13.9 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 20.7 °C by the end of May.
Ottawa experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 87.1 mm.
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Temperatures
Rain 🌧️
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8
Dry days
23
Rainy days
0
Snow days
17°/7°
Temperatures
17 km/h
Avg max wind
74 %
Avg humidity
Ottawa Weather May
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Temperatures trend during May in Ottawa
See the weather trend as well as the moving average line
May weather in Ottawa day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Patchy rain possible | 11° /3° | 12.7 mm | 3 | |
| 2 May | Patchy rain possible | 12° /5° | 5.5 mm | 3 | |
| 3 May | Patchy rain possible | 12° /4° | 2.7 mm | 4 | |
| 4 May | Patchy rain possible | 14° /5° | 2.8 mm | 3 | |
| 5 May | Patchy rain possible | 15° /7° | 2.4 mm | 4 | |
| 6 May | Patchy rain possible | 17° /7° | 1.1 mm | 4 | |
| 7 May |  Overcast | 16° /5° | 1.2 mm | 5 | |
| 8 May |  Sunny | 13° /4° | 0.9 mm | 4 | |
| 9 May | Overcast | 14° /4° | 1.2 mm | 4 | |
| 10 May | Patchy rain possible | 16° /5° | 0.2 mm | 4 | |
| 11 May |  Partly cloudy | 16° /4° | 1.9 mm | 5 | |
| 12 May |  Cloudy | 17° /6° | 0.3 mm | 5 | |
| 13 May | Partly cloudy | 17° /7° | 5.3 mm | 4 | |
| 14 May | Partly cloudy | 18° /8° | 1.4 mm | 4 | |
| 15 May | Overcast | 20° /9° | 0 mm | 5 | |
| 16 May |  Heavy rain at times | 19° /9° | 1.4 mm | 5 | |
| 17 May | Sunny | 18° /9° | 4.7 mm | 5 | |
| 18 May | Sunny | 18° /7° | 2 mm | 5 | |
| 19 May | Overcast | 20° /8° | 0.2 mm | 4 | |
| 20 May | Overcast | 17° /10° | 8.4 mm | 5 | |
| 21 May | Patchy rain possible | 18° /8° | 1.7 mm | 5 | |
| 22 May | Sunny | 18° /6° | 7.7 mm | 5 | |
| 23 May | Overcast | 18° /8° | 0.4 mm | 5 | |
| 24 May |  Moderate or heavy rain shower | 12° /6° | 7.8 mm | 3 | |
| 25 May | Sunny | 19° /6° | 1.5 mm | 5 | |
| 26 May | Overcast | 22° /9° | 0.8 mm | 6 | |
| 27 May | Sunny | 22° /10° | 4.1 mm | 6 | |
| 28 May | Sunny | 22° /10° | 1.5 mm | 6 | |
| 29 May | Overcast | 18° /9° | 0.8 mm | 4 | |
| 30 May | Sunny | 20° /8° | 0 mm | 6 | |
| 31 May | Sunny | 22° /9° | 4.1 mm | 7 | |
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Important Notice
Our weather forecast for Ottawa 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 Ottawa forecast closer to your planned date for the most up-to-date weather information.
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Ottawa in May - FAQ
What are the expected maximum and minimum temperatures in Ottawa 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 Ottawa during May?
Moderate rainfall is anticipated in Ottawa during May, with a total of 87.1 mm spread over approximately 23 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Ottawa during May?
The average wind speed in Ottawa during May is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Ottawa
Explore the daily rainfall trends and prepare for Ottawas May weather 💧
Typically, Ottawa has 23 rainy days in May with a total of 87.1 mm of rainfall.
UV exposure in Ottawa during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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