May weather forecastAlton, NH
May
Weather in May
In May, the season of rejuvenation progresses, casting a warm glow over Alton. May’s weather builds upon April’s patterns, further increasing the temperature, but distinctively lowers the rainfall to 2.2" (56mm), marking the end of spring showers. The decrease in rainfall fosters the growth of flourishing green landscapes across the town. With an average high temperature of 63.9°F (17.7°C), locals get to experience the true spring warmth. The shift in weather from April to May ushers in a festive mood and triggers the start of numerous outdoor activities.Temperature
As Alton, New Hampshire, welcomes May, the average high-temperature sees a rise, transitioning from a cool 50.9°F (10.5°C) in April to a refreshing 63.9°F (17.7°C). Alton records an average low-temperature of 43.7°F (6.5°C) throughout the month of May.Humidity
In May, the average relative humidity is 77%.Rainfall
In Alton, New Hampshire, in May, it is raining for 15.2 days, with typically 2.2" (56mm) of accumulated precipitation. 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. May is the last month it regularly snows. During 0.3 snowfall days, in May, Alton aggregates 0.35" (9mm) of snow. Throughout the year, there are 58.3 snowfall days, and 38.98" (990mm) of snow is accumulated.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, sunrise is at 5:06 am and sunset at 8:18 pm EDT.
Sunshine
In Alton, the average sunshine in May is 8h.UV index
In Alton, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 4 in May, converts into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 42min
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).
