August weather forecast
Rochester, NH

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Weather in August

August carries the warmth of July forward, though with a slight dip in the average highest temperature to 77.4°F (25.2°C). The transition from the peak summer season progresses slowly, with declining daylight hours and a drop in rainfall. The weather in August remains conducive to activities outdoors, with only infrequent showers to briefly dampen the warm, sunny days. The blend of sunlight and warmth in August maintains the summer spirit in Rochester, despite minor dips in temperature numbers.

Temperature

With the onset of August, a modest change to a still moderately hot 77.4°F (25.2°C) from July's 78.3°F (25.7°C) is noted in high-temperature. During the nights in August, an average low-temperature of 59.4°F (15.2°C) is observed in Rochester.

Humidity

In August, the average relative humidity in Rochester is 79%.

Rainfall

In Rochester, during August, the rain falls for 13.7 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Rochester, during the entire year, the rain falls for 143.1 days and collects up to 29.06" (738mm) of precipitation.

Snowfall

June through September are months without snowfall in Rochester, New Hampshire.

Daylight

The average length of the day in August in Rochester is 13h and 55min.
On the first day of August in Rochester, sunrise is at 5:34 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:07 am and sunset at 7:20 pm EDT.

Sunshine

With an average of 10.4h of sunshine, August has the most sunshine of the year in Rochester.

UV index

The months with the highest UV index are July and August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 6 in August transforms into the following instructions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
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Frequently asked questions

What are August temperatures in Rochester?

The high-temperature, in August, in Rochester, is 77.4°F (25.2°C), while the low-temperature averages to 59.4°F (15.2°C).

What is the average humidity in August in Rochester?

In August, the average relative humidity in Rochester is 79%.

How much does it rain in Rochester in August?

In Rochester, New Hampshire, in August, it is raining for 13.7 days, with typically 2.01" (51mm) of accumulated precipitation.

When it does not snow in Rochester?

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

How many hours of daylight does Rochester have in August?

The average day length in August is 13h and 55min.

What time are sunrise and sunset in August in Rochester?

In August, on the first day of the month, sunrise is at 5:34 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:07 am and sunset at 7:20 pm EDT.

What month has the most sunshine in Rochester?

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

How long on average sun shines in August in Rochester?

In Rochester, New Hampshire, the average sunshine duration in August is 10.4h.

What are the months with the highest UV index in Rochester?

The months with the highest UV index are July and August, with an average maximum UV index of 6.

What is the UV index intensity in August in Rochester?

In Rochester, New Hampshire, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to 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
Rochester, NH

Average temperature in August - Rochester, NH
  • Average high temperature in August: 77.4°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 (29.7°F).

  • Average low temperature in August: 59.4°F

The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

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Average pressure in August
Rochester, NH

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

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in August
Rochester, NH

Average wind speed in August - Rochester, NH
  • Average wind speed in August: 5.5mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in August
Rochester, NH

Average humidity in August - Rochester, NH
  • Average humidity in August: 79%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in August
Rochester, NH

Average rainfall in August - Rochester, NH
  • Average rainfall in August: 2.01"

The wettest months (with the highest rainfall) are October and December (3.11").
The driest month (with the least rainfall) is September (1.5").

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Average rainfall days in August
Rochester, NH

Average rainfall days in August - Rochester, NH
  • Average rainfall days in August: 13.7 days

The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is February (6.8 days).

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Average snowfall in August
Rochester, NH

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

The month with the highest snowfall is December (6.69").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Rochester, NH

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

The month with the highest number of snowfall days is January (10.4 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
Rochester, NH

Average daylight in August / Average sunshine in August - Rochester, 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 0min).

  • 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 42min).

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Average sunshine days in August
Rochester, NH

Average sunshine days in August - Rochester, NH
  • Average sunshine days in August: 15.3 days

The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is April (13.3 days).

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Average UV index in August
Rochester, NH

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

The months with the highest UV index are 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
Rochester, NH

Average cloud cover in August - Rochester, NH
  • Average cloud cover in August: 32

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in August
Rochester, NH

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

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

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Rochester, New Hampshire, USA

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