CanadaThe weather in May in Thunder Bay
It's cool to moderate in May in Thunder Bay with an average temperature of 15°C. Temperatures this month range from a low of 11°C to a high of 19°C. At night, you can expect temperatures between 1°C and 9°C.
Looking for sun and warm weather? May isn’t a good month to be in Thunder Bay. The temperatures are too low for a warm stay this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for Thunder Bay, Canada. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 29°C in 2014, Thunder Bay reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 3°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of -7°C to a highest value of 14°C.
Precipitation and snowfall
In May, there is an average of 67 mm of precipitation, spread over 10 days. Of the total precipitation, about 3,3 cm falls as snow in May. The wind speed is around 4 Bft, mostly coming from the Southeast.
Daily weather in May for Thunder Bay
Click on any day in May to get detailed info about the usual weather on that day in Thunder Bay. Check out the historical temperatures and precipitation over the past 10 years on this day.
May weather comparison
| Thunder Bay | New York | |
|---|---|---|
| Average temperature | 15°C | 22°C |
| Max. temperature | 19°C | 28°C |
| Min. temperature | 1°C | -5°C |
| Total precipitation | 67 mm | 105 mm |
| Rainy days | 10 days | 14 days |
| Total snowfall | 3,3 cm | 0 cm |
| Snowy days | 2 days | 0 days |
Start of May
The month of May starts in Thunder Bay with cool temps, averaging around 13°C during the day and nights around 2°C.
Mid May
By mid-May, daytime temps rise to around 16°C, with nights around 4°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of May
By the end of May, the average daytime temperature in Thunder Bay is around 19°C, while nighttime temps are about 7°C. A shower might pop up, but overall, the weather will be dry and sunny.
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UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Thunder Bay for all months and discover the best travel time
Curious about the weather in other parts of Canada? Check out the climate and weather for spots like Vancouver, Toronto, Niagara Falls, or explore other destinations in Canada.
Temperature charts
These charts show the average temperatures in May in Thunder Bay, Canada. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in May in Thunder Bay
Temperature in May in Thunder Bay over the years
Precipitation charts
These charts show the average amount of precipitation in May in Thunder Bay, Canada. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in May in Thunder Bay
Total precipitation in May in Thunder Bay over the years
Daily Snowfall in May in Thunder Bay
Snowfall in May in Thunder Bay per year
Daily UV index in May in Thunder Bay
This chart shows the average daily UV index in May in Thunder Bay, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in May in Thunder Bay
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Average weather in Thunder Bay by month
Click on a month below to see detailed weather info for Thunder Bay. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.