May weather forecast
Weston, MA

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Weather in May

The last month of the spring, May, is a refreshing month in Weston, Massachusetts, with an average temperature ranging between min 49.6°F (9.8°C) and max 66.9°F (19.4°C).

Temperature

In May, the average high-temperature increases from a mild 55.9°F (13.3°C) in April to a still refreshing 66.9°F (19.4°C). Weston, in May, observes a steady average low-temperature of 49.6°F (9.8°C).

Humidity

In May, the average relative humidity is 73%.

Rainfall

In Weston, during May, the rain falls for 10.6 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, in Weston, there are 106.3 rainfall days, and 8.5" (216mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall in Weston. May is the last month it regularly snows. During 0.1 snowfall days, in May, Weston aggregates 0.04" (1mm) of snow. Throughout the year, in Weston, there are 19.6 snowfall days, and 4.02" (102mm) of snow is accumulated.

Daylight

In May, the average length of the day in Weston is 14h and 37min.
On the first day of May, sunrise is at 5:39 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:15 pm EDT.

Sunshine

In Weston, the average sunshine in May is 8.4h.

UV index

In Weston, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 5 during May translates into these guidelines:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

What are the temperatures in Weston in May?

The high-temperature, in May, in Weston, is 66.9°F (19.4°C), while the low-temperature averages to 49.6°F (9.8°C).

What is the average humidity in May in Weston?

The average relative humidity in May is 73%.

How much does it rain in Weston in May?

In Weston, Massachusetts, during May, the rain falls for 10.6 days and regularly aggregates up to 0.75" (19mm) of precipitation.

What is the last month it snows in Weston?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Weston aggregates 0.04" (1mm) of snow.

How many hours of daylight does Weston have in May?

The average day length in May in Weston, Massachusetts, is 14h and 37min.

When is the sunrise / sunset in May in Weston?

In May, on the first day of the month, sunrise is at 5:39 am and sunset at 7:45 pm. On the last day of the month, in Weston, sunrise is at 5:10 am and sunset at 8:15 pm EDT.

How many hours of sunshine does Weston have in May?

The average sunshine duration in May in Weston, Massachusetts, is 8.4h.

How high is the UV index in May in Weston?

In Weston, Massachusetts, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Weston, MA

Average temperature in May - Weston, MA
  • Average high temperature in May: 66.9°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.3°F).

  • Average low temperature in May: 49.6°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

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Average pressure in May
Weston, MA

Average pressure in May - Weston, MA
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in May
Weston, MA

Average wind speed in May - Weston, MA
  • Average wind speed in May: 7mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in May
Weston, MA

Average humidity in May - Weston, MA
  • Average humidity in May: 73%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).

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Average rainfall in May
Weston, MA

Average rainfall in May - Weston, MA
  • Average rainfall in May: 0.75"

The wettest months (with the highest rainfall) are April and November (0.87").
The driest month (with the least rainfall) is September (0.35").

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Average rainfall days in May
Weston, MA

Average rainfall days in May - Weston, MA
  • Average rainfall days in May: 10.6 days

The month with the highest number of rainy days is July (12.4 days).
The month with the least rainy days is January (5.3 days).

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Average snowfall in May
Weston, MA

Average snowfall in May - Weston, MA
  • Average snowfall in May: 0.04"

The month with the highest snowfall is December (1.14").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in May
Weston, MA

Average snowfall days in May - Weston, MA
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is February (5.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in May /
Average sunshine in May
Weston, MA

Average daylight in May / Average sunshine in May - Weston, MA
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in May: 8h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in May
Weston, MA

Average sunshine days in May - Weston, MA
  • Average sunshine days in May: 17 days

The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is June (15.8 days).

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Average UV index in May
Weston, MA

Average UV index in May - Weston, MA
  • Average UV index in May: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in May
Weston, MA

Average cloud cover in May - Weston, MA
  • Average cloud cover in May: 46

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in May
Weston, MA

Average visibility in May - Weston, MA
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Weston, Massachusetts, USA

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