The weather in May in Saint John

It's hot in May in Saint John with an average temperature of 31°C. Temperatures this month range from a low of 30°C to a high of 31°C. At night, you can expect temperatures between 25°C and 27°C.

May is a good month to be in Saint John for sunny weather. You’ll have high temperatures and not too much rain.

Average temperatures and precipitation

This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for Saint John, Grenada. 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 32°C in 2017, Saint John reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 26°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 18°C to a highest value of 28°C.

Rainfall amount

In May, there is an average of 40 mm of precipitation, spread over 7 days. The wind speed is around 6 Bft, mostly coming from the East.

Daily weather in May for Saint John

Click on any day in May to get detailed info about the usual weather on that day in Saint John. Check out the historical temperatures and precipitation over the past 10 years on this day.

May weather comparison

  Saint John New York
Average temperature 31°C 22°C
Max. temperature 31°C 28°C
Min. temperature 25°C -5°C
Total precipitation 40 mm 105 mm
Rainy days 7 days 14 days

Start of May

The month of May starts in Saint John with hot temps, averaging around 31°C during the day and nights around 27°C.

Mid May

By mid-May, daytime temps stay steady at around 31°C, with nights around 27°C. Not much precipitation expected during this period. It’s mostly dry and sunny.

End of May

By the end of May, the average daytime temperature in Saint John is around 31°C, while nighttime temps are about 27°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.

UV index

The UV index is a maximum of 10 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 Saint John for all months and discover the best travel time

Temperature charts

These charts show the average temperatures in May in Saint John, Grenada. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.

Daily Temperature in May in Saint John

Temperature in May in Saint John over the years

Precipitation charts

These charts show the average amount of precipitation in May in Saint John, Grenada. 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 Saint John

Total precipitation in May in Saint John over the years

Daily UV index in May in Saint John

This chart shows the average daily UV index in May in Saint John, 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 Saint John

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Average weather in Saint John by month

Click on a month below to see detailed weather info for Saint John. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.