August weather forecast
Bristol, NH

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Weather in August

The last month of the summer, August, is another warm month in Bristol, New Hampshire, with an average temperature fluctuating between 55.2°F (12.9°C) and 76.6°F (24.8°C).

Temperature

The advent of August brings an average high-temperature of a still moderately hot 76.6°F (24.8°C), almost identical to the preceding month. In the month of August, the temperature generally rests at an average low of 55.2°F (12.9°C).

Humidity

In August, the average relative humidity is 78%.

Rainfall

In Bristol, in August, during 14.7 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. Throughout the year, there are 157.6 rainfall days, and 27.72" (704mm) of precipitation is accumulated.

Snowfall

In Bristol, snow does not fall in June through September.

Daylight

In August, the average length of the day in Bristol is 13h and 56min.
On the first day of August, sunrise is at 5:37 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 7:23 pm EDT.

Sunshine

The month with the most sunshine is August, with an average of 10h of sunshine.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 5 in August translates into the following instructions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Updated: Jul 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in August?

The average high-temperature and low-temperature during August are 76.6°F (24.8°C) and 55.2°F (12.9°C) respectively.

What is the average humidity in August?

In Bristol, the average relative humidity in August is 78%.

How many days does it rain in August?

In August, the rain falls for 14.7 days. Throughout August, 1.89" (48mm) of precipitation is accumulated.

When it does not snow?

In Bristol, snow does not fall in June through September.

How many hours of daylight does Bristol have in August?

The average day length in August is 13h and 56min.

When are sunrise and sunset in August?

On the first day of August, sunrise is at 5:37 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 7:23 pm EDT.

What month has the most sunshine in Bristol?

With an average of 10h of sunshine, August has the most sunshine of the year.

How long on average sun shines in August?

In August, the average sunshine duration is 10h.

When is the highest UV index in Bristol?

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

What is the UV index reading in August?

In August, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
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
Bristol, NH

Average temperature in August - Bristol, NH
  • Average high temperature in August: 76.6°F

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (25.7°F).

  • Average low temperature in August: 55.2°F

The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).

Average pressure in August
Bristol, NH

Average pressure in August - Bristol, NH
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in August
Bristol, NH

Average wind speed in August - Bristol, 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 month (with the lowest average wind speed) is August (4.7mph).

Average humidity in August
Bristol, NH

Average humidity in August - Bristol, NH
  • Average humidity in August: 78%

The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (75%).

Average rainfall in August
Bristol, NH

Average rainfall in August - Bristol, NH
  • Average rainfall in August: 1.89"

The wettest month (with the highest rainfall) is October (3.15").
The driest month (with the least rainfall) is September (1.85").

Average rainfall days in August
Bristol, NH

Average rainfall days in August - Bristol, NH
  • Average rainfall days in August: 14.7 days

The month with the highest number of rainy days is April (15.7 days).
The month with the least rainy days is January (10.1 days).

Average snowfall in August
Bristol, NH

Average snowfall in August - Bristol, NH
  • Average snowfall in August: 0"

The month with the highest snowfall is February (9.41").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Bristol, NH

Average snowfall days in August - Bristol, NH
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Bristol, NH

Average daylight in August / Average sunshine in August - Bristol, 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

The month with the most sunshine is August (Average sunshine: 10h).
The month with the least sunshine is February (Average sunshine: 4h).

Average sunshine days in August
Bristol, NH

Average sunshine days in August - Bristol, NH
  • Average sunshine days in August: 13.8 days

The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is February (10.2 days).

Average UV index in August
Bristol, NH

Average UV index in August - Bristol, NH
  • Average UV index in August: 5

The months with the highest UV index are May, 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 August
Bristol, NH

Average cloud cover in August - Bristol, NH
  • Average cloud cover in August: 36

The months with the most cloud cover are February and March (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 36).

Average visibility in August
Bristol, NH

Average visibility in August - Bristol, NH
  • Average visibility in August: 5mi

The months with the highest visibility are April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February, March and September (4mi).

Bristol, New Hampshire, USA

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