Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
In Merrimac, August's average high-temperature stands at a still warm 79.9°F (26.6°C), closely related to the preceding month. Throughout August, Merrimac records an average temperature of 61.9°F (16.6°C) at night.Humidity
In Merrimac, 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. In Merrimac, during the entire year, the rain falls for 78.3 days and collects up to 5.43" (138mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
The average length of the day in August is 13h and 53min.On the first day of August, sunrise is at 5:36 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 7:19 pm EDT.
Sunshine
With an average of 10.6h of sunshine, August has the most sunshine of the year in Merrimac.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 threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In August, the average maximum UV index of 6 translates into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are August temperatures?
What is the average humidity in August?
How much does it rain in August?
When it does not snow?
How many hours of daylight does Merrimac have in August?
When are sunrise and sunset in August?
What month has the most sunshine?
How many hours of sunshine does Merrimac have in August?
What are the months with the highest UV index?
What is the UV index intensity in August?
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).
Average pressure in August
Merrimac, MA
- 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).
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).
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%).
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").
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).
Average snowfall in August
Merrimac, MA
- Average snowfall in August: 0"
The month with the highest snowfall is December (0.71").
The months with the least snowfall are June, July, August, September and October (0").
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).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Merrimac, MA
- 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 4min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
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).
Average UV index in August
Merrimac, 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
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).
Average visibility in August
Merrimac, 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).
Merrimac, Massachusetts, USA
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