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Average weather for St Mary's in May

It's cool to moderate in May in St Mary's with an average temperature of 15°C. Temperatures this month range from a low of 13°C to a high of 17°C. At night, you can expect temperatures between 9°C and 13°C.

Daily Temperature in May in St Mary's

Start of May

The month of May starts in St Mary's with cool temps, averaging around 14°C during the day and nights around 11°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.

Mid May

By mid-May, daytime temps rise to around 15°C, with nights around 11°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 St Mary's is around 16°C, while nighttime temps are about 12°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.

In May, there is an average of 40 mm of precipitation, spread over 8 days. The wind speed is around 5 Bft, mostly coming from the South.

St Mary's in May

New York
Temperature Average temperature
15°C 22°C
Sun Max. temperature
17°C 28°C
Sun Min. temperature
13°C -5°C
Rain Total precipitation
40 mm 105 mm
Rain Rainy days
8 days 14 days

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.

Is May a good time to visit St Mary's?

Looking for sun and warm weather? May isn’t a good month to be in St Mary's. The temperatures are too low for a warm stay this month.

Temperature records

With 22°C in 2020, St Mary's reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 10°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 15°C.

Check out the climate of St Mary's for all months and discover the best travel time

Daily Temperature in May in St Mary's

This chart shows the average daily high and low temperatures in May for St Mary's, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.

Daily Temperature in May in St Mary's

Daily Precipitation in May in St Mary's

The chart below shows the average daily precipitation in May for St Mary's, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.

A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 8 days of precipitation in St Mary's.

Daily Precipitation in May in St Mary's

Daily UV index in May in St Mary's

This chart shows the average daily UV index in May in St Mary's, 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.

Daily UV Index in May in St Mary's

Temperature in May in St Mary's over the years

This chart shows the average temperature in May in St Mary's, measured in degrees Celsius, over the past few years.

Temperature in May in St Mary's Over the Years

Total precipitation in May in St Mary's over the years

This chart shows the average precipitation in May in St Mary's, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.

Precipitation in May in St Mary's over the years

Daily weather in May for St Mary's

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

Weather experiences in May in St Mary's

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Average weather in St Mary's by month

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


Or check out the climate of St Mary's for all months at once

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