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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Alton Bay, New Hampshire, is a freezing cold winter month, with an average temperature ranging between max 26.1°F (-3.3°C) and min 12.9°F (-10.6°C). Alton Bay's coldest temperatures are experienced in January, with average high temperatures of 26.1°F (-3.3°C) and lows of 12.9°F (-10.6°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Alton Bay, New Hampshire, with an average temperature varying between 29.3°F (-1.5°C) and 14.4°F (-9.8°C). February records an average high-temperature of a still freezing cold 29.3°F (-1.5°C), indicating a minor variation from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Alton Bay, is a wintry month, with an average temperature varying between 37.9°F (3.3°C) and 22.5°F (-5.3°C). March's arrival signals a subtle increase in average high-temperatures, moving from February's subzero cold 29.3°F (-1.5°C) to a wintry 37.9°F (3.3°C). Weather in March »
Weather in April
April is a fresh spring month in Alton Bay, New Hampshire, with an average temperature fluctuating between 50.9°F (10.5°C) and 33.6°F (0.9°C). The onset of April marks an increase in the average high-temperature, moving from an icy 37.9°F (3.3°C) in March to a fresh 50.9°F (10.5°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Alton Bay, New Hampshire, with an average temperature varying between 43.7°F (6.5°C) and 63.9°F (17.7°C). 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). Weather in May »
Weather in June
June, the first month of the summer in Alton Bay, is a pleasant month, with an average temperature varying between 71.6°F (22°C) and 51.3°F (10.7°C). Alton Bay in June experiences a slight uptick in the average high-temperature, adjusting from May's enjoyable 63.9°F (17.7°C) to a pleasant 71.6°F (22°C). Weather in June »
Weather in July
July in Alton Bay, New Hampshire, is a warm summer month, with an average temperature ranging between max 78.3°F (25.7°C) and min 57.6°F (14.2°C). The warmest period tends to be July, when average temperatures fluctuate between a high of 78.3°F (25.7°C) and a low of 57.6°F (14.2°C). Weather in July »
Weather in August
August, the last month of the summer in Alton Bay, is also a moderately hot month, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 77.2°F (25.1°C). The average high-temperature during August registers at a still moderately hot 77.2°F (25.1°C), closely corresponding to the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Alton Bay, is still a pleasant month, with an average temperature ranging between max 69.6°F (20.9°C) and min 49.6°F (9.8°C). The transition to September results in a modest reduction in average high-temperature, moving from a moderately hot 77.2°F (25.1°C) in August to a pleasant 69.6°F (20.9°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Alton Bay, New Hampshire, with temperature in the range of an average low of 40.8°F (4.9°C) and an average high of 55.9°F (13.3°C). With October's onset, the weather shows a temperature decrease, transitioning from an agreeable 69.6°F (20.9°C) in September to a refreshing 55.9°F (13.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Alton Bay, New Hampshire, with an average temperature varying between 43.3°F (6.3°C) and 30°F (-1.1°C). The onset of November entails a temperature shift, as the average high-temperature decreases from a refreshing 55.9°F (13.3°C) in October to a frosty 43.3°F (6.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Alton Bay, New Hampshire, with temperature in the range of an average high of 31.8°F (-0.1°C) and an average low of 21.6°F (-5.8°C). December brings a drop in Alton Bay's average high-temperature, falling from a frosty 43.3°F (6.3°C) in November to a freezing cold 31.8°F (-0.1°C). Weather in December »
Updated: Jul 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
Temperature records mark January as the coldest month, with highs averaging 26.1°F (-3.3°C) and lows at 12.9°F (-10.6°C).
What are the most humid months?
January and February, with an average relative humidity of 86%, are most humid months.
How much does it rain in Alton Bay?
In Alton Bay, during the entire year, the rain falls for 152 days and collects up to 29.09" (739mm) of precipitation.
When does it snow?
Months with snowfall are January through May, October through December.
How many days does it snow?
Throughout the year, in Alton Bay, there are 58.3 snowfall days, and 38.98" (990mm) of snow is accumulated.
What are the months with the lowest UV index?
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
When does it snow the most?
The month with the most snowfall is February, when snow falls for 12.4 days and typically aggregates up to 9.84" (250mm) of snow.
What is the month with the least sunshine in Alton Bay?
The month with the least sunshine is February, with an average of 4.5h of sunshine.
When is Daylight Saving Time (DST) in Alton Bay?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the least humid month?
The least humid month is April, with an average relative humidity of 76%.
When it does not snow?
In Alton Bay, snow does not fall in June through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 24min of daylight.
What is the month with the highest UV index?
June through August, with an average maximum UV index of 5, are months with the highest UV index.
What are the warmest months?
July brings the highest temperatures, with an average high of 78.3°F (25.7°C) and an average low of 57.6°F (14.2°C).
What month has the most sunshine?
August has the most sunshine of the year, with an average of 10.2h of sunshine.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 10.8 days and typically collects 1.61" (41mm) of precipitation.
What is the rainiest month?
October is the month with the most rainfall. Rain falls for 14.4 days and accumulates 3.19" (81mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 0min of daylight.
Average temperature
Alton Bay, NH
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).
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
Alton Bay, NH
- Average pressure in January:
30"Hg - Average pressure in February:
29.98"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.03"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
Alton Bay, NH
- Average wind speed in January:
7.1mph - Average wind speed in February:
7.1mph - Average wind speed in March:
6.9mph - Average wind speed in April:
6.8mph - Average wind speed in May:
5.7mph - Average wind speed in June:
5.2mph
- Average wind speed in July:
4.7mph - Average wind speed in August:
4.7mph - Average wind speed in September:
4.8mph - Average wind speed in October:
5.8mph - Average wind speed in November:
6.1mph - Average wind speed in December:
6.6mph
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
Alton Bay, NH
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (76%).
Average rainfall
Alton Bay, NH
- Average rainfall in January:
2.17" - Average rainfall in February:
2.13" - Average rainfall in March:
2.24" - Average rainfall in April:
2.99" - Average rainfall in May:
2.2" - Average rainfall in June:
2.64"
- Average rainfall in July:
2.09" - Average rainfall in August:
2.05" - Average rainfall in September:
1.61" - Average rainfall in October:
3.19" - Average rainfall in November:
2.87" - Average rainfall in December:
2.91"
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
Alton Bay, NH
- Average rainfall days in January:
10 days - Average rainfall days in February:
8.3 days - Average rainfall days in March:
11.7 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
15.2 days - Average rainfall days in June:
15 days
- Average rainfall days in July:
15.4 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
10.8 days - Average rainfall days in October:
14.4 days - Average rainfall days in November:
10.7 days - Average rainfall days in December:
10.4 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
Alton Bay, NH
- Average snowfall in January:
7.36" - Average snowfall in February:
9.84" - Average snowfall in March:
7.24" - Average snowfall in April:
3.7" - Average snowfall in May:
0.35" - Average snowfall in June:
0"
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
Alton Bay, NH
- Average snowfall days in January:
13.2 days - Average snowfall days in February:
12.4 days - Average snowfall days in March:
11.6 days - Average snowfall days in April:
4.3 days - Average snowfall days in May:
0.3 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
5.5 days - Average snowfall days in December:
10.6 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 / Average sunshine
Alton Bay, NH
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
9h and 0min
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 January:
4h and 5min - Average sunshine in February:
4h and 3min - Average sunshine in March:
5h and 3min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 0min - Average sunshine in June:
8h and 4min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 1min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
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
Alton Bay, NH
- Average sunshine days in January:
14.7 days - Average sunshine days in February:
12.6 days - Average sunshine days in March:
11.9 days - Average sunshine days in April:
11.4 days - Average sunshine days in May:
13.2 days - Average sunshine days in June:
13.2 days
- Average sunshine days in July:
13 days - Average sunshine days in August:
14.4 days - Average sunshine days in September:
16.9 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
16.3 days - Average sunshine days in December:
13.9 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
Alton Bay, NH
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
Alton Bay, NH
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
Alton Bay, NH
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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