May weather forecast
Monmouth, ME

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Weather in May

May, the last month of the spring in Monmouth, is a comfortable month, with an average temperature varying between 63.1°F (17.3°C) and 44.1°F (6.7°C).

Temperature

May's arrival is marked by an increase in the average high-temperature, moving from a cool 50°F (10°C) in April to a refreshing 63.1°F (17.3°C). Monmouth observes an average low-temperature of 44.1°F (6.7°C) during May nights.

Humidity

In May, the average relative humidity is 78%.

Rainfall

In Monmouth, during May, the rain falls for 13.1 days and regularly aggregates up to 1.54" (39mm) of precipitation. Throughout the year, there are 119.4 rainfall days, and 17.17" (436mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Monmouth aggregates 0.24" (6mm) of snow. In Monmouth, during the entire year, snow falls for 39.3 days and aggregates up to 19.37" (492mm) of snow.

Daylight

In May, the average length of the day is 14h and 47min.
On the first day of May in Monmouth, sunrise is at 5:29 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 4:59 am and sunset at 8:16 pm EDT.

Sunshine

In Monmouth, Maine, the average sunshine in May is 8h.

UV index

In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In May, the average maximum UV index of 4 translates into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Opt for tightly woven and loose clothing to enhance protection from the Sun. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Updated: Jun 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in May?

In Monmouth, 63.1°F (17.3°C) is the average high-temperature and 44.1°F (6.7°C) is the average low-temperature during May.

What is the average humidity in May?

The average relative humidity in May is 78%.

How many days does it rain in May?

In May, the rain falls for 13.1 days. Throughout May, 1.54" (39mm) of precipitation is accumulated.

What is the last month it snows?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Monmouth aggregates 0.24" (6mm) of snow.

What is the average length of the day in May?

The average day length in May is 14h and 47min.

What time are sunrise and sunset in May?

In May, on the first day of the month, sunrise is at 5:29 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 4:59 am and sunset at 8:16 pm EDT.

How long on average sun shines in May?

The average sunshine duration in May is 8h.

What is the UV index reading in May?

In May, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to the Sun's 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
Monmouth, ME

Average temperature in May - Monmouth, ME
  • Average high temperature in May: 63.1°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (26.6°F).

  • Average low temperature in May: 44.1°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).

Average pressure in May
Monmouth, ME

Average pressure in May - Monmouth, ME
  • Average pressure in May: 29.99"Hg

The month with the highest atmospheric pressure is November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in May
Monmouth, ME

Average wind speed in May - Monmouth, ME
  • Average wind speed in May: 6.3mph

The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

Average humidity in May
Monmouth, ME

Average humidity in May - Monmouth, ME
  • Average humidity in May: 78%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is November (76%).

Average rainfall in May
Monmouth, ME

Average rainfall in May - Monmouth, ME
  • Average rainfall in May: 1.54"

The wettest month (with the highest rainfall) is June (1.93").
The driest month (with the least rainfall) is September (0.91").

Average rainfall days in May
Monmouth, ME

Average rainfall days in May - Monmouth, ME
  • Average rainfall days in May: 13.1 days

The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is February (4.2 days).

Average snowfall in May
Monmouth, ME

Average snowfall in May - Monmouth, ME
  • Average snowfall in May: 0.24"

The month with the highest snowfall is February (5.35").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in May
Monmouth, ME

Average snowfall days in May - Monmouth, ME
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Monmouth, ME

Average daylight in May / Average sunshine in May - Monmouth, 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: 8h and 0min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in May
Monmouth, ME

Average sunshine days in May - Monmouth, ME
  • Average sunshine days in May: 15.6 days

The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is July (13.8 days).

Average UV index in May
Monmouth, ME

Average UV index in May - Monmouth, 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).

Average cloud cover in May
Monmouth, ME

Average cloud cover in May - Monmouth, ME
  • Average cloud cover in May: 49

The months with the most cloud cover are March and April (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 35).

Average visibility in May
Monmouth, ME

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

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

Monmouth, Maine, USA

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