Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
With the onset of May, Alton Bay experiences a temperature shift, with the average high-temperature moving from a cool 50.9°F (10.5°C) in April to a comfortable 63.9°F (17.7°C). Alton Bay temperatures generally rest at a low of 43.7°F (6.5°C) during the May nights.Humidity
In Alton Bay, the average relative humidity in May is 77%.Rainfall
In Alton Bay, in May, during 15.2 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. In Alton Bay, during the entire year, the rain falls for 152 days and collects up to 29.09" (739mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Alton Bay aggregates 0.35" (9mm) of snow. Throughout the year, there are 58.3 snowfall days, and 38.98" (990mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 43min.On the first day of the month, sunrise is at 5:36 am and sunset at 7:47 pm. On the last day of May, sunrise is at 5:06 am and sunset at 8:18 pm EDT.
Sunshine
The average sunshine in May is 8h.UV index
In Alton Bay, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In May, the maximum UV index of 4 transforms into these recommendations:
Act with care - The need to guard against sun damage is communicated. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Alton Bay have in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Alton Bay have in May?
How high is the UV index in May?
Average temperature in May
Alton Bay, NH
- Average high temperature in May: 63.9°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in May: 43.7°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure in May
Alton Bay, NH
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Alton Bay, NH
- Average wind speed in May: 5.7mph
The windiest months (with the highest average wind speed) are January and February (7.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in May
Alton Bay, NH
- Average humidity in May: 77%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Alton Bay, NH
- Average rainfall in May: 2.2"
The wettest month (with the highest rainfall) is October (3.19").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in May
Alton Bay, NH
- Average rainfall days in May: 15.2 days
The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in May
Alton Bay, NH
- Average snowfall in May: 0.35"
The month with the highest snowfall is February (9.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Alton Bay, NH
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Alton Bay, NH
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in May
Alton Bay, NH
- Average sunshine days in May: 13.2 days
The month with the most sunshine days is September (16.9 days).
The month with the least sunshine days is April (11.4 days).
Average UV index in May
Alton Bay, NH
- 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
Alton Bay, NH
- Average cloud cover in May: 50
The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in May
Alton Bay, NH
- Average visibility in May: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February and September (4mi).
Alton Bay, New Hampshire, USA
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