May weather forecast
Waterbury, CT

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Weather in May

May in Waterbury offers a prelude to summer, with temperatures rising between 48.9°F (9.4°C) to 68.2°F (20.1°C). This is the month when outdoor activities become commonplace following the retreat of cold weather. May sees the city basking in sunlight with the landscape painted in varied shades of green. The days get longer and the evenings lighter, bringing a sense of renewal and optimism.

Temperature

In Waterbury, the average high-temperature in May increases from a mild 56.7°F (13.7°C) in April to a pleasant 68.2°F (20.1°C). Waterbury experiences a nighttime temperature average of 48.9°F (9.4°C) during May.

Humidity

In May, the average relative humidity is 75%.

Rainfall

In Waterbury, in May, it is raining for 16.8 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, in Waterbury, there are 158.5 rainfall days, and 34.57" (878mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Waterbury are January through May, October through December. May is the last month it regularly snows in Waterbury. During 0.1 snowfall days, in May, Waterbury aggregates 0.16" (4mm) of snow. In Waterbury, during the entire year, snow falls for 34.9 days and aggregates up to 20.35" (517mm) of snow.

Daylight

In May, the average length of the day is 14h and 32min.
On the first day of May in Waterbury, sunrise is at 5:47 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 5:20 am and sunset at 8:19 pm EDT.

Sunshine

The average sunshine in May is 8.2h.

UV index

The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In May, the maximum UV index of 5 translates into these guidelines:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the usual temperature for Waterbury in May?

In Waterbury, 68.2°F (20.1°C) is the average high-temperature and 48.9°F (9.4°C) is the average low-temperature during May.

What is the average humidity in May in Waterbury?

In Waterbury, the average relative humidity in May is 75%.

How much does it rain in Waterbury in May?

In May, in Waterbury, the rain falls for 16.8 days. Throughout May, 2.64" (67mm) of precipitation is accumulated.

What is the last month it snows in Waterbury?

May is the last month it regularly snows in Waterbury. During 0.1 snowfall days, in May, Waterbury aggregates 0.16" (4mm) of snow.

How many hours of daylight does Waterbury have in May?

In May, the average day length is 14h and 32min.

What time are sunrise and sunset in May in Waterbury?

In May, on the first day of the month, sunrise is at 5:47 am and sunset at 7:50 pm. On the last day of the month, in Waterbury, sunrise is at 5:20 am and sunset at 8:19 pm EDT.

How many hours of sunshine does Waterbury have in May?

In May, the average sunshine duration in Waterbury, Connecticut, is 8.2h.

How high is the UV index in May in Waterbury?

In Waterbury, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Waterbury, CT

Average temperature in May - Waterbury, CT
  • Average high temperature in May: 68.2°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.3°F).

  • Average low temperature in May: 48.9°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).

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Average pressure in May
Waterbury, CT

Average pressure in May - Waterbury, CT
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Waterbury, CT

Average wind speed in May - Waterbury, CT
  • Average wind speed in May: 6.4mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in May
Waterbury, CT

Average humidity in May - Waterbury, CT
  • Average humidity in May: 75%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in May
Waterbury, CT

Average rainfall in May - Waterbury, CT
  • Average rainfall in May: 2.64"

The wettest month (with the highest rainfall) is December (3.78").
The driest month (with the least rainfall) is September (2.13").

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Average rainfall days in May
Waterbury, CT

Average rainfall days in May - Waterbury, CT
  • Average rainfall days in May: 16.8 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall in May
Waterbury, CT

Average snowfall in May - Waterbury, CT
  • Average snowfall in May: 0.16"

The month with the highest snowfall is February (5.39").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Waterbury, CT

Average snowfall days in May - Waterbury, CT
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is February (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Waterbury, CT

Average daylight in May / Average sunshine in May - Waterbury, CT
  • Average daylight in May: 14h and 3min

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

  • Average sunshine in May: 8h and 1min

The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days in May
Waterbury, CT

Average sunshine days in May - Waterbury, CT
  • Average sunshine days in May: 12.5 days

The month with the most sunshine days is January (18.1 days).
The month with the least sunshine days is June (11.1 days).

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Average UV index in May
Waterbury, CT

Average UV index in May - Waterbury, CT
  • 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
Waterbury, CT

Average cloud cover in May - Waterbury, CT
  • Average cloud cover in May: 49

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in May
Waterbury, CT

Average visibility in May - Waterbury, CT
  • Average visibility in May: 5mi

The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).

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Waterbury, Connecticut, USA

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