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
July's arrival signals a subtle increase in average high-temperatures, moving from June's enjoyable 63°F (17.2°C) to an agreeable 70.3°F (21.3°C). Chatham notes an average temperature descent to a refreshing 67.1°F (19.5°C) in July, a small shift from its daytime peak.Humidity
June and July, with an average relative humidity of 85%, are the most humid months.Rainfall
In Chatham, during July, the rain falls for 13.8 days and regularly aggregates up to 1.73" (44mm) of precipitation. 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
In Chatham, in July, the average water temperature is 65.3°F (18.5°C).Note: Most people do not enjoy swimming in water of 65.3°F (18.5°C). Breathing control becomes harder as the temperature descends from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Chatham, the average length of the day in July is 14h and 51min.On the first day of the month, sunrise is at 5:09 am and sunset at 8:18 pm. On the last day of July, sunrise is at 5:33 am and sunset at 7:58 pm EDT.
Sunshine
The average sunshine in July in Chatham is 10.5h.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 health risk from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 6 in July transforms into the following instructions:
Deflect overexposure. Sun protection is a necessity. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are July temperatures?
What is the most humid month in Chatham?
What is the average humidity in July?
How much does it rain in July?
When it does not snow?
How cold is the water in July?
What is the average length of the day in July?
When is the sunrise / sunset in July?
How long on average sun shines in July?
What is the month with the highest UV index?
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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