May weather forecast
Waterville, ME

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Weather in May

May is a delightful month to be in Waterville, offering a perfect blend of warmth and precipitation. The mercury column in the thermometer stretches from 43°F (6.1°C) to 63°F (17.2°C) throughout May, making it the transition period from cool to warmer months. A marked difference can be observed as May progresses into June with the temperature and daylight hours on a steady rise. Evenings in May are colder than in June giving way to cooler nights. The blend of acceptable temperatures and sufficient rainfall positions May as a fitting month for outdoor activities.

Temperature

Waterville in May sees a temperature change, with average high-temperatures moving from a chilly 49.8°F (9.9°C) in April to an enjoyable 63°F (17.2°C). During May, Waterville's temperature falls to a steady low-temperature average of 43°F (6.1°C).

Humidity

In May, the average relative humidity in Waterville is 79%.

Rainfall

In Waterville, in May, it is raining for 15.9 days, with typically 2.24" (57mm) of accumulated precipitation. In Waterville, during the entire year, the rain falls for 140.4 days and collects up to 28.35" (720mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Waterville aggregates 0.71" (18mm) of snow. Throughout the year, in Waterville, there are 55.2 snowfall days, and 37.83" (961mm) of snow is accumulated.

Daylight

In Waterville, the average length of the day in May is 14h and 50min.
On the first day of the month, sunrise is at 5:27 am and sunset at 7:43 pm. On the last day of May, in Waterville, sunrise is at 4:56 am and sunset at 8:15 pm EDT.

Sunshine

In Waterville, Maine, the average sunshine in May is 7.6h.

UV index

In May, the average daily maximum UV index in Waterville is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In May, the average maximum UV index of 4 translates into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the average May temperature in Waterville?

An average high-temperature, in May, in Waterville, is 63°F (17.2°C) and the average low-temperature is 43°F (6.1°C).

What is the average humidity in May in Waterville?

The average relative humidity in May is 79%.

How much does it rain in Waterville in May?

In Waterville, Maine, in May, during 15.9 rainfall days, 2.24" (57mm) of precipitation is typically accumulated.

What is the last month it snows in Waterville?

May is the last month it regularly snows in Waterville, Maine. During 0.2 snowfall days, in May, Waterville aggregates 0.71" (18mm) of snow.

What is the average length of the day in May in Waterville?

In Waterville, Maine, the average day length in May is 14h and 50min.

When are sunrise and sunset in May in Waterville?

In May, on the first day of the month, sunrise is at 5:27 am and sunset at 7:43 pm. On the last day of the month, in Waterville, Maine, sunrise is at 4:56 am and sunset at 8:15 pm EDT.

How many hours of sunshine does Waterville have in May?

In May, the average sunshine duration in Waterville is 7.6h.

How high is the UV index in May in Waterville?

The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
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
Waterville, ME

Average temperature in May - Waterville, ME
  • Average high temperature in May: 63°F

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (25.3°F).

  • Average low temperature in May: 43°F

The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).

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Average pressure in May
Waterville, ME

Average pressure in May - Waterville, ME
  • Average pressure in May: 29.98"Hg

The months with the highest atmospheric pressure are September and November (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in May
Waterville, ME

Average wind speed in May - Waterville, ME
  • Average wind speed in May: 6.8mph

The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in May
Waterville, ME

Average humidity in May - Waterville, ME
  • Average humidity in May: 79%

The months with the highest relative humidity are February and March (85%).
The months with the lowest relative humidity are April and November (78%).

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Average rainfall in May
Waterville, ME

Average rainfall in May - Waterville, ME
  • Average rainfall in May: 2.24"

The wettest month (with the highest rainfall) is April (3.03").
The driest month (with the least rainfall) is September (1.54").

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Average rainfall days in May
Waterville, ME

Average rainfall days in May - Waterville, ME
  • Average rainfall days in May: 15.9 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (5.6 days).

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Average snowfall in May
Waterville, ME

Average snowfall in May - Waterville, ME
  • Average snowfall in May: 0.71"

The month with the highest snowfall is January (8.07").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Waterville, ME

Average snowfall days in May - Waterville, ME
  • Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is January (12.1 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
Waterville, ME

Average daylight in May / Average sunshine in May - Waterville, ME
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in May: 7h and 4min

The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

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Average sunshine days in May
Waterville, ME

Average sunshine days in May - Waterville, ME
  • Average sunshine days in May: 13.3 days

The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (11.5 days).

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Average UV index in May
Waterville, ME

Average UV index in May - Waterville, ME
  • Average UV index in May: 4

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in May
Waterville, ME

Average cloud cover in May - Waterville, ME
  • Average cloud cover in May: 52

The months with the most cloud cover are February, March and April (Cloud cover 54).
The months with the least cloud cover are August and September (Cloud cover 40).

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Average visibility in May
Waterville, ME

Average visibility in May - Waterville, ME
  • Average visibility in May: 5mi

The months with the highest visibility are November and December (6mi).
The month with the lowest visibility is August (4mi).

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Waterville, Maine, USA

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