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 sea temperature 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
Temperature records mark August as the warmest month, with highs averaging 71.6°F (22°C) and lows at 68.2°F (20.1°C).Humidity
In August, the average relative humidity is 82%.Rainfall
In Chatham, in August, during 12.1 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. Throughout the year, there are 142.4 rainfall days, and 22.09" (561mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Ocean temperature
The month with the warmest seawater is August, with an average ocean temperature of 67.6°F (19.8°C).Note: The majority of people find swimming in 67.6°F (19.8°C) unenjoyable. As the water temperature decreases from 69.8°F (21°C) to 59°F (15°C), breathing becomes more challenging to control.
Daylight
In August, the average length of the day is 13h and 48min.On the first day of August, sunrise is at 5:34 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 7:14 pm EDT.
Sunshine
The month with the most sunshine is August, with an average of 10.7h of sunshine.UV index
July and August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.Note: In August, the UV index of 6 transforms into the following advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the hottest?
What is the usual temperature for Chatham in August?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
What month is the ocean warmest?
How cold is the water in August in Chatham?
What is the average length of the day in August?
When is the sunrise / sunset in August?
What month has the most sunshine?
How long on average sun shines in August?
When is the highest UV index?
What is the UV index intensity in August in Chatham?
Average temperature in August
Chatham, MA
- Average high temperature in August: 71.6°F
The warmest month (with the highest average high temperature) is August (71.6°F).
The months with the lowest average high temperature are January and February (39°F).
- Average low temperature in August: 68.2°F
The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).
Average pressure in August
Chatham, 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
Chatham, MA
- Average wind speed in August: 11.4mph
The windiest month (with the highest average wind speed) is January (18mph).
The calmest month (with the lowest average wind speed) is August (11.4mph).
Average humidity in August
Chatham, MA
- Average humidity in August: 82%
The months with the highest relative humidity are June and July (85%).
The month with the lowest relative humidity is November (74%).
Average rainfall in August
Chatham, MA
- Average rainfall in August: 1.5"
The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is November (1.46").
Average rainfall days in August
Chatham, MA
- Average rainfall days in August: 12.1 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in August
Chatham, MA
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Chatham, MA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in August
Chatham, MA
- Average sea temperature in August: 67.6°F
The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is March (39.8°F).
Average daylight in August /
Average sunshine in August
Chatham, 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 December (Average sunshine: 4h and 18min).
Average sunshine days in August
Chatham, MA
- Average sunshine days in August: 17.6 days
The month with the most sunshine days is August (17.6 days).
The month with the least sunshine days is January (13 days).
Average UV index in August
Chatham, MA
- 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).
Average cloud cover in August
Chatham, MA
- Average cloud cover in August: 27
The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in August
Chatham, 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).
Chatham, Massachusetts, USA
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