August weather forecast
Merrimac, MA

Weather in August

The last month of the summer, August, is another warm month in Merrimac, Massachusetts, with temperature in the range of an average high of 79.9°F (26.6°C) and an average low of 61.9°F (16.6°C).

Temperature

In August, the average high-temperature is practically the same as in July - a still warm 79.9°F (26.6°C). In Merrimac, in August, the average low-temperature is 61.9°F (16.6°C).

Humidity

The average relative humidity in August is 75%.

Rainfall

In August, the rain falls for 7.8 days. Throughout August, 0.35" (9mm) of precipitation is accumulated. Throughout the year, in Merrimac, there are 78.3 rainfall days, and 5.43" (138mm) of precipitation is accumulated.

Snowfall

In Merrimac snow does not fall in June through October.

Daylight

In Merrimac, the average length of the day is 13.9h.

Sunshine

August has the most sunshine of the year in Merrimac, with an average of 10.6h of sunshine.

UV index

Months with the highest UV index in Merrimac are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to the UV radiation for the average person.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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 average humidity in August in Merrimac?

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

How much does it rain in Merrimac in August?

In August, the rain falls for 7.8 days. Throughout August, 0.35" (9mm) of precipitation is accumulated.

When it does not snow in Merrimac?

June through October are months without snowfall in Merrimac.

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

The average length of the day in August is 13.9h.

What month has the most sunshine in Merrimac?

August has the most sunshine of the year in Merrimac, Massachusetts, with an average of 10.6h of sunshine.

How long on average sun shines in August in Merrimac?

In Merrimac, Massachusetts, the average sunshine in August is 10.6h.

What is the month with the highest UV index in Merrimac?

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

How high is the UV index in August in Merrimac?

In August, the average daily maximum UV index in Merrimac, Massachusetts, is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to the Sun's UV rays.

Average temperature in August
Merrimac, MA

Average temperature in August - Merrimac, MA
  • Average high temperature in August: 79.9°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in August: 61.9°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

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Average pressure in August
Merrimac, MA

Average pressure in August - Merrimac, MA
  • Average pressure in August: 29.97"

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

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Average wind speed in August
Merrimac, MA

Average wind speed in August - Merrimac, MA
  • Average wind speed in August: 5.7mph

The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity in August
Merrimac, MA

Average humidity in August - Merrimac, MA
  • Average humidity in August: 75%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (71%).

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Average rainfall in August
Merrimac, MA

Average rainfall in August - Merrimac, MA
  • Average rainfall in August: 0.35"

The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.2").

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Average rainfall days in August
Merrimac, MA

Average rainfall days in August - Merrimac, MA
  • Average rainfall days in August: 7.8 days

The month with the highest number of rainy days is July (8.8 days).
The month with the least rainy days is January (3.6 days).

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Average snowfall in August
Merrimac, MA

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

The month with the highest snowfall is December (0.71").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in August
Merrimac, MA

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

The month with the highest number of snowfall days is February (5.3 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in August / Average sunshine in August - Merrimac, MA
  • 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: 10.6h

The month with the most sunshine is August (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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Average sunshine days in August
Merrimac, MA

Average sunshine days in August - Merrimac, MA
  • Average sunshine days in August: 20.3 days

The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is April (18.4 days).

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Average UV index in August
Merrimac, MA

Average UV index in August - Merrimac, MA
  • 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
Merrimac, MA

Average cloud cover in August - Merrimac, MA
  • Average cloud cover in August: 31

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in August
Merrimac, MA

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

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

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