Ottawa
May
Weather in Ottawa for May 2025
Your guide to Ottawa weather in May - trends and predictions
In general, the average temperature in Ottawa at the beginning of May is 13.7 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 21 °C by the end of May.
Ottawa in May brings notable rainfall, with an average of 17 rainy days and a total precipitation of 95.5 mm.
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Temperatures
Rain 🌧️
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14
Dry days
17
Rainy days
0
Snow days
17°/7°
Temperatures
16 km/h
Avg max wind
75 %
Avg humidity
Ottawa in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  12° | 2  13° | 3 11° | 4  11° | |||
| 5 12° | 6  18° | 7  19° | 8  14° | 9 14° | 10  17° | 11 18° |
| 12 17° | 13 15° | 14 18° | 15 21° | 16 16° | 17 16° | 18 17° |
| 19 21° | 20 19° | 21 21° | 22 21° | 23 22° | 24 13° | 25 17° |
| 26 20° | 27 21° | 28 22° | 29 20° | 30 22° | 31 25° |
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Temperatures trend during May in Ottawa
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 | Moderate or heavy rain shower | 12° /4° | 23.8 mm | 3 | |
| 2 May | Heavy rain at times | 13° /6° | 4.6 mm | 3 | |
| 3 May | Moderate or heavy rain shower | 11° /5° | 5.3 mm | 3 | |
| 4 May | Patchy rain possible | 11° /6° | 3.7 mm | 3 | |
| 5 May | Patchy rain possible | 12° /7° | 3.6 mm | 3 | |
| 6 May | Cloudy | 18° /7° | 0.3 mm | 4 | |
| 7 May | Overcast | 19° /7° | 0 mm | 5 | |
| 8 May | Sunny | 14° /6° | 1.1 mm | 4 | |
| 9 May | Sunny | 14° /4° | 0.5 mm | 4 | |
| 10 May | Partly cloudy | 17° /5° | 0.1 mm | 5 | |
| 11 May | Partly cloudy | 18° /7° | 2.1 mm | 5 | |
| 12 May | Cloudy | 17° /9° | 0.6 mm | 4 | |
| 13 May | Partly cloudy | 15° /6° | 2.6 mm | 5 | |
| 14 May | Partly cloudy | 18° /7° | 2.1 mm | 5 | |
| 15 May | Partly cloudy | 21° /7° | 0.1 mm | 5 | |
| 16 May | Heavy rain at times | 16° /7° | 2.4 mm | 4 | |
| 17 May | Sunny | 16° /6° | 0.6 mm | 5 | |
| 18 May | Sunny | 17° /7° | 1.2 mm | 5 | |
| 19 May | Overcast | 21° /7° | 0 mm | 5 | |
| 20 May | Moderate or heavy rain shower | 19° /13° | 16.1 mm | 4 | |
| 21 May | Patchy rain possible | 21° /12° | 3.3 mm | 5 | |
| 22 May | Sunny | 21° /8° | 1.3 mm | 6 | |
| 23 May | Sunny | 22° /9° | 0.1 mm | 6 | |
| 24 May | Moderate or heavy rain shower | 13° /6° | 8 mm | 3 | |
| 25 May | Sunny | 17° /4° | 0.7 mm | 5 | |
| 26 May | Overcast | 20° /7° | 0 mm | 5 | |
| 27 May | Sunny | 21° /9° | 8.1 mm | 6 | |
| 28 May | Sunny | 22° /10° | 2.9 mm | 6 | |
| 29 May | Sunny | 20° /9° | 0 mm | 5 | |
| 30 May | Sunny | 22° /7° | 0 mm | 6 | |
| 31 May | Sunny | 25° /10° | 0 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.
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 95.5 mm spread over approximately 17 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 16 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 💧
UV exposure in Ottawa during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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