August weather forecast
Rochester, MA

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Weather in August

August, the last month of the summer in Rochester, is also a moderately hot month, with an average temperature fluctuating between 66.7°F (19.3°C) and 76.6°F (24.8°C).

Temperature

In Rochester, temperatures reach their average annual highs in August, measuring 76.6°F (24.8°C) and a minimum average of 66.7°F (19.3°C).

Humidity

The average relative humidity in August is 78%.

Rainfall

In August, the rain falls for 12.6 days. Throughout August, 1.18" (30mm) of precipitation is accumulated. In Rochester, during the entire year, the rain falls for 136.3 days and collects up to 15.63" (397mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in August is 13h and 49min.
On the first day of the month, sunrise is at 5:38 am and sunset at 8:01 pm. On the last day of August, sunrise is at 6:08 am and sunset at 7:17 pm EDT.

Sunshine

August has the most sunshine of the year, with an average of 10.7h 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 reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 6 in August converts into the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.

Frequently asked questions

What is the hottest time of year in Rochester?

The month of August sees the average highest temperatures, reaching 76.6°F (24.8°C) at the peak and 66.7°F (19.3°C) at the low.

What are August temperatures?

An average high-temperature, in August, in Rochester, is 76.6°F (24.8°C) and the average low-temperature is 66.7°F (19.3°C).

What is the average humidity in August?

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

How much does it rain in August?

In Rochester, Massachusetts, in August, during 12.6 rainfall days, 1.18" (30mm) of precipitation is typically accumulated.

When it does not snow?

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 in Rochester is 13h and 49min.

What time are sunrise and sunset in August?

On the first day of August, sunrise is at 5:38 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 7:17 pm EDT.

What month has the most sunshine?

August has the most sunshine of the year, with an average of 10.7h of sunshine.

How long on average sun shines in August?

In August, the average sunshine duration is 10.7h.

What are the months with the highest UV index?

The 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 August, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high hazard to health 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
Rochester, MA

Average temperature in August - Rochester, MA
  • Average high temperature in August: 76.6°F

The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in August: 66.7°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).

Average pressure in August
Rochester, MA

Average pressure in August - Rochester, MA
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in August
Rochester, MA

Average wind speed in August - Rochester, MA
  • Average wind speed in August: 8.3mph

The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).

Average humidity in August
Rochester, MA

Average humidity in August - Rochester, MA
  • Average humidity in August: 78%

The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are March and November (74%).

Average rainfall in August
Rochester, MA

Average rainfall in August - Rochester, MA
  • Average rainfall in August: 1.18"

The wettest month (with the highest rainfall) is October (1.89").
The driest month (with the least rainfall) is February (0.98").

Average rainfall days in August
Rochester, MA

Average rainfall days in August - Rochester, MA
  • Average rainfall days in August: 12.6 days

The months with the highest number of rainy days are May and July (14.1 days).
The month with the least rainy days is February (7.7 days).

Average snowfall in August
Rochester, MA

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

The month with the highest snowfall is February (1.1").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Rochester, MA

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

The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Rochester, MA

Average daylight in August / Average sunshine in August - Rochester, MA
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in August: 10h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in August
Rochester, MA

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

The month with the most sunshine days is December (17.7 days).
The month with the least sunshine days is April (14.3 days).

Average UV index in August
Rochester, MA

Average UV index in August - Rochester, MA
  • 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).

Average cloud cover in August
Rochester, MA

Average cloud cover in August - Rochester, MA
  • Average cloud cover in August: 28

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in August
Rochester, MA

Average visibility in August - Rochester, MA
  • Average visibility in August: 6mi

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

Rochester, Massachusetts, USA

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