Toronto weather in May
In May, Toronto has an average high of 14 °C58 °F and an average low of 7 °C45 °F, with about 73 mm2.9 in of precipitation. It is the 6th warmest month of the year and ranks 3rd for precipitation.
How May compares with other months
Compared with April, May is 5.8 °C10.4 °F warmer on average. Compared with June, May is 6.3 °C11.4 °F cooler on average. Daylight lasts about 14.7 hours around the middle of the month. Average relative humidity is 78% and the average cloud amount 74%.
Is May a good time to visit Toronto?
May is not among the most comfortable months by our comfort score: it is cool (average high 14 °C58 °F) and it is fairly wet (73 mm2.9 in). The most comfortable months in Toronto are June–September.
What to wear in May
For Toronto in May, pack long sleeves, a sweater and a medium jacket.
May in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Toronto | 1458 | 745 | 732.9 |
| Markham | 1865 | 744 | 672.7 |
| Brampton | 1967 | 745 | 742.9 |
| Ajax | 1864 | 846 | 662.6 |
| Oshawa | 1864 | 745 | 662.6 |
| St. Catharines | 1763 | 948 | 813.2 |
| Guelph | 1966 | 643 | 742.9 |
| Barrie | 1762 | 643 | 582.3 |
| Brantford | 1967 | 846 | 773.0 |
Nearby places that are more than 1 °C1.8 °F warmer in May: Markham, Brampton, Ajax and Oshawa.
Other months in Toronto
- January−1 °C31 °F / −5 °C22 °F
- February−1 °C31 °F / −6 °C22 °F
- March3 °C38 °F / −3 °C27 °F
- April8 °C47 °F / 2 °C35 °F
- May14 °C58 °F / 7 °C45 °F
- June21 °C69 °F / 14 °C57 °F
- July25 °C76 °F / 18 °C64 °F
- August24 °C76 °F / 18 °C65 °F
- September21 °C69 °F / 15 °C59 °F
- October14 °C57 °F / 9 °C47 °F
- November7 °C45 °F / 3 °C37 °F
- December2 °C36 °F / −2 °C28 °F
Frequently asked questions
How warm is Toronto in May?
In May the average high in Toronto is 14 °C (58 °F) and the average low is 7 °C (45 °F).
Does it rain a lot in Toronto in May?
On average about 73 mm (2.9 in) of precipitation falls in May; it ranks 3rd of the 12 months.
Is May the warmest month in Toronto?
No. The warmest month in Toronto is July, with an average high of 25 °C (76 °F). The coldest month is February, with an average low of -6 °C (22 °F).
How long is the day in Toronto in May?
In the middle of May the day in Toronto lasts about 14.7 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Toronto in May?
The average relative humidity in May is about 78%. This is a long-term average for the whole day.
How cloudy is Toronto in May?
On average about 74% of the sky is covered by cloud in May. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 99 m, while Toronto lies at about 161 m. Temperatures on this page were therefore adjusted by −0.4 °C0.7 °F using the standard lapse rate of 6.5 °C per 1,000 m.