August weather forecast and climate
Manchester, NH

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, the last month of the summer, in Manchester, is another warm month, with average temperature varying between 59.9°F (15.5°C) and 80.1°F (26.7°C).

Temperature

In August, the average high-temperature is relatively the same as in July - a still moderately hot 80.1°F (26.7°C). In August, in Manchester, the average low-temperature is 59.9°F (15.5°C).

Humidity

The average relative humidity in Manchester, New Hampshire, is 75%.

Rainfall

In August, in Manchester, the rain falls for 10.4 days. Throughout August, 1.1" (28mm) of precipitation is accumulated. Throughout the year, 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 Manchester is 13.9h.

Sunshine

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

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV rays for average individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in August in Manchester?

The average high-temperature, in August, in Manchester, New Hampshire, is 80.1°F (26.7°C), while the average low-temperature is 59.9°F (15.5°C).

What is the average humidity in August in Manchester?

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

How many days does it rain in August in Manchester?

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 length of the day in Manchester is 13.9h.

What month has the most sunshine in Manchester?

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

How long on average sun shines in August in Manchester?

In August, the average sunshine is 10.4h.

When is the highest UV index in Manchester?

Months with the highest UV index 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 reading of 6 to 7 represents a high health threat from unprotected exposure to the UV radiation.

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"

The month with the highest atmospheric pressure is November (30.07").
The month with the lowest atmospheric pressure is June (29.92").

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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").
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).
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: 13.9h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in August: 10.4h

The month with the most sunshine is August (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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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

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

Months with the highest UV index are June, July and August (UV index 6).
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

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

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