August weather forecast
Manchester, NH

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The colorful buildings in the city of Manchester, New Hampshire, right next to scenic trees on the seashore, a beautiful glass image in the river below
The colorful buildings in the city of Manchester, New Hampshire, right next to scenic trees on the seashore, a beautiful glass image in the river below

Weather in August

August continues July's heat, but the decreasing daylight announces the imminent arrival of autumn. The month is typically defined by 1.1" (28mm) of rainfall. The decrease in wind speed at 5.1mph (8.2km/h) adds to the still, warm atmosphere. As the days shorten, anticipation builds for the brilliant fall colors that define New England's landscapes.

Temperature

August's presence marks an average high-temperature of a still warm 80.1°F (26.7°C), subtly varied from July's 81.7°F (27.6°C). In August, the average low-temperature is a refreshing 59.9°F (15.5°C).

Humidity

The average relative humidity in August in Manchester is 75%.

Rainfall

In Manchester, in August, it is raining for 10.4 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, in Manchester, there are 104.4 rainfall days, and 12.95" (329mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Manchester.

Daylight

The average length of the day in August is 13h and 53min.
On the first day of August, sunrise is at 5:37 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 7:21 pm EDT.

Sunshine

August has the most sunshine of the year in Manchester, with an average of 10.4h of sunshine.

UV index

The months with the highest UV index in Manchester are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum daily UV index of 6 during August morphs into the following directions:
Deflect overexposure. Sun protection is a necessity. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
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Frequently asked questions

What are August temperatures in Manchester?

The high-temperature, in August, in Manchester, records 80.1°F (26.7°C), while the low-temperature is 59.9°F (15.5°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in July is computed to be 86°F (30°C).

What is the average humidity in August in Manchester?

In Manchester, the average relative humidity in August is 75%.

How much does it rain in Manchester in August?

In Manchester, New Hampshire, in August, during 10.4 rainfall days, 1.1" (28mm) of precipitation is typically accumulated.

When it does not snow in Manchester?

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

What is the average length of the day in August in Manchester?

In August, the average day length in Manchester is 13h and 53min.

When are sunrise and sunset in August in Manchester?

On the first day of August, sunrise is at 5:37 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 7:21 pm EDT.

What month has the most sunshine in Manchester?

The month with the most sunshine in Manchester, New Hampshire, is August, with an average of 10.4h of sunshine.

How many hours of sunshine does Manchester have in August?

In August, the average sunshine duration is 10.4h.

When is the highest UV index in Manchester?

The months with the highest UV index in Manchester are June through August, with an average maximum UV index of 6.

What is the UV index reading in August in Manchester?

In August, the average daily maximum UV index in Manchester is 6. A UV Index estimate of 6 to 7 represents a high health 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
Manchester, NH

Average temperature in August - Manchester, NH
  • Average high temperature in August: 80.1°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in August: 59.9°F

The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in August
Manchester, NH

Average pressure in August - Manchester, 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 (29.92"Hg).

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Average wind speed in August
Manchester, NH

Average wind speed in August - Manchester, NH
  • Average wind speed in August: 5.1mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in August
Manchester, NH

Average humidity in August - Manchester, NH
  • Average humidity in August: 75%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in August
Manchester, NH

Average rainfall in August - Manchester, NH
  • Average rainfall in August: 1.1"

The wettest month (with the highest rainfall) is October (1.38").
The driest month (with the least rainfall) is January (0.75").

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Average rainfall days in August
Manchester, NH

Average rainfall days in August - Manchester, NH
  • Average rainfall days in August: 10.4 days

The month with the highest number of rainy days is June (12.1 days).
The month with the least rainy days is January (4.1 days).

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Average snowfall in August
Manchester, NH

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

The month with the highest snowfall is December (2.99").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Manchester, NH

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

The month with the highest number of snowfall days is January (7.1 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
Manchester, NH

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

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in August
Manchester, NH

Average sunshine days in August - Manchester, NH
  • Average sunshine days in August: 18 days

The months with the most sunshine days are January and December (21.3 days).
The month with the least sunshine days is June (16.7 days).

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Average UV index in August
Manchester, NH

Average UV index in August - Manchester, NH
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in August
Manchester, NH

Average cloud cover in August - Manchester, NH
  • Average cloud cover in August: 33

The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in August
Manchester, NH

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

The months with the highest visibility are January, April, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August, September and October (5mi).

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Manchester, New Hampshire, USA

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