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
Alton's weather in May shows a rise in the average high-temperature, moving up from April's cool 50.9°F (10.5°C) to an enjoyable 63.9°F (17.7°C). May sees the temperature falling to a mean low of 43.7°F (6.5°C).Humidity
The average relative humidity in May is 77%.Rainfall
In May, the rain falls for 15.2 days. Throughout May, 2.2" (56mm) of precipitation is accumulated. In Alton, during the entire year, the rain falls for 152 days and collects up to 29.09" (739mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Alton. May is the last month it regularly snows. During 0.3 snowfall days, in May, Alton aggregates 0.35" (9mm) of snow. In Alton, during the entire year, snow falls for 58.3 days and aggregates up to 38.98" (990mm) of snow.Daylight
The average length of the day in May 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, in Alton, sunrise is at 5:06 am and sunset at 8:18 pm EDT.
Sunshine
In Alton, New Hampshire, the average sunshine in May is 8h.UV index
In Alton, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In May, the maximum UV index of 4 suggests these recommendations:
Heed the precautions - It is counselled to guard against solar damage. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
What is the average May temperature in Alton?
What is the average humidity in May in Alton?
How many days does it rain in May in Alton?
What is the last month it snows in Alton?
What is the average length of the day in May in Alton?
What time are sunrise and sunset in May in Alton?
How long on average sun shines in May in Alton?
What is the UV index reading in May in Alton?
Average temperature in May
Alton, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, New Hampshire, USA
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