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
In Chatham, temperatures reach their average annual highs in August, measuring 71.6°F (22°C) and a minimum average of 68.2°F (20.1°C).Humidity
In Chatham, Massachusetts, the average relative humidity in August is 82%.Rainfall
In August, the rain falls for 12.1 days. Throughout August, 1.5" (38mm) of precipitation is accumulated. Throughout the year, there are 142.4 rainfall days, and 22.09" (561mm) of precipitation is accumulated.Snowfall
In Chatham, snow does not fall in May through October.Ocean temperature
August is the month with the warmest seawater, with an average ocean temperature of 67.6°F (19.8°C).Note: For most individuals, swimming in 67.6°F (19.8°C) is not a pleasurable activity. Breathing becomes progressively more difficult as water temperature declines below 69.8°F (21°C).
Daylight
In August, the average length of the day is 13h and 48min.On the first day of the month, sunrise is at 5:34 am and sunset at 7:57 pm. On the last day of August, in Chatham, sunrise is at 6:05 am and sunset at 7:14 pm EDT.
Sunshine
August has the most sunshine of the year, with an average of 10.7h of sunshine.UV index
The months with the highest UV index in Chatham are July and August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 6 in August translates into the following instructions:
Deflect overexposure. Sun protection is a necessity. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
What is the warmest month in Chatham?
What are the temperatures in Chatham in August?
What is the average humidity in August in Chatham?
How many days does it rain in August in Chatham?
When it does not snow in Chatham?
What is the month with the warmest ocean in Chatham?
What is the ocean temperature in August in Chatham?
How many hours of daylight does Chatham have in August?
What time are sunrise and sunset in August in Chatham?
What month has the most sunshine in Chatham?
How many hours of sunshine does Chatham have in August?
What are the months with the highest UV index in Chatham?
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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