Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average snowfall in July
- Average snowfall days in July
- Average sea temperature in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
In July, the meteorological conditions subtly change with the average high-temperature edging from a refreshing 63°F (17.2°C) in June to a pleasant 70.3°F (21.3°C). Chatham, during the nights of July, averages a temperature close to its daytime high, at a comfortable 67.1°F (19.5°C).Humidity
June and July, with an average relative humidity of 85%, are the most humid months.Rainfall
In July, the rain falls for 13.8 days. Throughout July, 1.73" (44mm) of precipitation is accumulated. Throughout the year, in Chatham, there are 142.4 rainfall days, and 22.09" (561mm) of precipitation is accumulated.Snowfall
In Chatham, Massachusetts, snow does not fall in May through October.Ocean temperature
In July, the average ocean temperature in Chatham is 65.3°F (18.5°C).Note: For most individuals, swimming in 65.3°F (18.5°C) is not a pleasurable activity. Breathing becomes progressively more difficult as water temperature declines below 69.8°F (21°C).
Daylight
The average length of the day in July is 14h and 51min.On the first day of July, sunrise is at 5:09 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 7:58 pm EDT.
Sunshine
In Chatham, the average sunshine in July is 10.5h.UV index
The months with the highest UV index are July and August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In July, the maximum UV index of 6 suggests these recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What are the temperatures in Chatham in July?
What are the most humid months in Chatham?
What is the average humidity in July in Chatham?
How much does it rain in Chatham in July?
When it does not snow in Chatham?
What is the ocean temperature in July in Chatham?
How many hours of daylight does Chatham have in July?
When are sunrise and sunset in July in Chatham?
How many hours of sunshine does Chatham have in July?
What is the month with the highest UV index in Chatham?
What is the UV index reading in July in Chatham?
Average temperature in July
Chatham, MA
- Average high temperature in July: 70.3°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 July: 67.1°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 July
Chatham, MA
- Average pressure in July: 29.96"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 July
Chatham, MA
- Average wind speed in July: 11.6mph
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 July
Chatham, MA
- Average humidity in July: 85%
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 July
Chatham, MA
- Average rainfall in July: 1.73"
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 July
Chatham, MA
- Average rainfall days in July: 13.8 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 July
Chatham, MA
- Average snowfall in July: 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 July
Chatham, MA
- Average snowfall days in July: 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 July
Chatham, MA
- Average sea temperature in July: 65.2°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 July /
Average sunshine in July
Chatham, MA
- Average daylight in July: 14h 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 July: 10h and 3min
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 July
Chatham, MA
- Average sunshine days in July: 16.4 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 July
Chatham, MA
- Average UV index in July: 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 July
Chatham, MA
- Average cloud cover in July: 30
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 July
Chatham, MA
- Average visibility in July: 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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