August weather forecast
Alton Bay, NH

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Weather in August

The last month of the summer, August, is also a moderately hot month in Alton Bay, New Hampshire, with an average temperature fluctuating between 56.3°F (13.5°C) and 77.2°F (25.1°C).

Temperature

Alton Bay marks the onset of August with an average high-temperature of a still warm 77.2°F (25.1°C), a subtle shift from July's 78.3°F (25.7°C). Throughout the month of August, Alton Bay witnesses an average low-temperature of 56.3°F (13.5°C).

Humidity

In August, the average relative humidity is 79%.

Rainfall

In August, in Alton Bay, the rain falls for 14.3 days. Throughout August, 2.05" (52mm) of precipitation is accumulated. In Alton Bay, New Hampshire, during the entire year, the rain falls for 152 days and collects up to 29.09" (739mm) of precipitation.

Snowfall

June through September are months without snowfall in Alton Bay.

Daylight

The average length of the day in August in Alton Bay is 13h and 55min.
On the first day of the month, sunrise is at 5:35 am and sunset at 8:07 pm. On the last day of August, sunrise is at 6:08 am and sunset at 7:21 pm EDT.

Sunshine

The month with the most sunshine in Alton Bay is August, with an average of 10.2h of sunshine.

UV index

The months with the highest UV index in Alton Bay are June through August, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 5 during August translates into these guidelines:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
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Frequently asked questions

What are August temperatures in Alton Bay?

The high-temperature, in August, in Alton Bay, records 77.2°F (25.1°C), while the low-temperature is 56.3°F (13.5°C).

What is the average humidity in August in Alton Bay?

In August, the average relative humidity in Alton Bay, New Hampshire, is 79%.

How many days does it rain in August in Alton Bay?

In August, in Alton Bay, New Hampshire, the rain falls for 14.3 days. Throughout August, 2.05" (52mm) of precipitation is accumulated.

When it does not snow in Alton Bay?

In Alton Bay, New Hampshire, snow does not fall in June through September.

What is the average length of the day in August in Alton Bay?

In Alton Bay, the average day length in August is 13h and 55min.

When are sunrise and sunset in August in Alton Bay?

In August, on the first day of the month, sunrise is at 5:35 am and sunset at 8:07 pm. On the last day of the month, in Alton Bay, New Hampshire, sunrise is at 6:08 am and sunset at 7:21 pm EDT.

What month has the most sunshine in Alton Bay?

With an average of 10.2h of sunshine, August has the most sunshine of the year in Alton Bay.

How many hours of sunshine does Alton Bay have in August?

In Alton Bay, the average sunshine duration in August is 10.2h.

What are the months with the highest UV index in Alton Bay?

June through August, with an average maximum UV index of 5, are months with the highest UV index.

What is the UV index reading in August in Alton Bay?

In August, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Alton Bay, NH

Average temperature in August - Alton Bay, NH
  • Average high temperature in August: 77.2°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 August: 56.3°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).

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Average pressure in August
Alton Bay, NH

Average pressure in August - Alton Bay, NH
  • Average pressure in August: 29.96"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).

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Average wind speed in August
Alton Bay, NH

Average wind speed in August - Alton Bay, NH
  • Average wind speed in August: 4.7mph

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).

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Average humidity in August
Alton Bay, NH

Average humidity in August - Alton Bay, NH
  • Average humidity in August: 79%

The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in August
Alton Bay, NH

Average rainfall in August - Alton Bay, NH
  • Average rainfall in August: 2.05"

The wettest month (with the highest rainfall) is October (3.19").
The driest month (with the least rainfall) is September (1.61").

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Average rainfall days in August
Alton Bay, NH

Average rainfall days in August - Alton Bay, NH
  • Average rainfall days in August: 14.3 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).

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Average snowfall in August
Alton Bay, NH

Average snowfall in August - Alton Bay, NH
  • Average snowfall in August: 0"

The month with the highest snowfall is February (9.84").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Alton Bay, NH

Average snowfall days in August - Alton Bay, NH
  • Average snowfall days in August: 0 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).

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Average daylight in August /
Average sunshine in August
Alton Bay, NH

Average daylight in August / Average sunshine in August - Alton Bay, NH
  • Average daylight in August: 13h and 5min

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 August: 10h and 1min

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).

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Average sunshine days in August
Alton Bay, NH

Average sunshine days in August - Alton Bay, NH
  • Average sunshine days in August: 14.4 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).

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Average UV index in August
Alton Bay, NH

Average UV index in August - Alton Bay, NH
  • Average UV index in August: 5

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).

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Average cloud cover in August
Alton Bay, NH

Average cloud cover in August - Alton Bay, NH
  • Average cloud cover in August: 35

The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in August
Alton Bay, NH

Average visibility in August - Alton Bay, NH
  • Average visibility in August: 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).

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Alton Bay, New Hampshire, USA

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