July weather forecast
South Chatham, MA

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Weather in July

July is an agreeable summer month in South Chatham, Massachusetts, with an average temperature fluctuating between 70.3°F (21.3°C) and 67.1°F (19.5°C).

Temperature

A slight uplift of average high-temperatures is noted in July, with temperatures adjusting from a comfortable 63°F (17.2°C) in June to a pleasant 70.3°F (21.3°C). In July, South Chatham temperatures settle at a low of 67.1°F (19.5°C) during the nights, reflecting a minor change from daytime highs.

Humidity

The months with the highest humidity are June and July, with an average relative humidity of 85%.

Rainfall

In South Chatham, Massachusetts, 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

In South Chatham, snow does not fall in May through October.

Daylight

In South Chatham, 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 5:34 am and sunset at 7:58 pm EDT.

Sunshine

In South Chatham, Massachusetts, the average sunshine in July 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 of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: An average maximum UV index of 6 in July leads to these recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
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Frequently asked questions

What are the temperatures in South Chatham in July?

During July, South Chatham experiences an average high-temperature of 70.3°F (21.3°C) and a low-temperature of 67.1°F (19.5°C).

What is the most humid month in South Chatham?

June and July, with an average relative humidity of 85%, are most humid months in South Chatham.

What is the average humidity in July in South Chatham?

The average relative humidity in July in South Chatham, Massachusetts, is 85%.

How much does it rain in South Chatham in July?

In July, the rain falls for 13.8 days. Throughout July, 1.73" (44mm) of precipitation is accumulated.

When it does not snow in South Chatham?

May through October are months without snowfall in South Chatham, Massachusetts.

What is the average length of the day in July in South Chatham?

In July, the average day length in South Chatham, Massachusetts, is 14h and 51min.

What time are sunrise and sunset in July in South Chatham?

On the first day of July in South Chatham, sunrise is at 5:09 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 7:58 pm EDT.

How long on average sun shines in July in South Chatham?

In July, the average sunshine duration in South Chatham, Massachusetts, is 10.5h.

When is the highest UV index in South Chatham?

July and August, with an average maximum UV index of 6, are months with the highest UV index.

How high is the UV index in July in South Chatham?

In South Chatham, the average daily maximum UV index in July is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
South Chatham, MA

Average temperature in July - South 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).

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Average pressure in July
South Chatham, MA

Average pressure in July - South 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).

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Average wind speed in July
South Chatham, MA

Average wind speed in July - South 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).

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Average humidity in July
South Chatham, MA

Average humidity in July - South 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%).

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Average rainfall in July
South Chatham, MA

Average rainfall in July - South 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").

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Average rainfall days in July
South Chatham, MA

Average rainfall days in July - South 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).

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Average snowfall in July
South Chatham, MA

Average snowfall in July - South 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").

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Average snowfall days in July
South Chatham, MA

Average snowfall days in July - South 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).

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Average daylight in July /
Average sunshine in July
South Chatham, MA

Average daylight in July / Average sunshine in July - South 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).

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Average sunshine days in July
South Chatham, MA

Average sunshine days in July - South 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).

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Average UV index in July
South Chatham, MA

Average UV index in July - South 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).

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Average cloud cover in July
South Chatham, MA

Average cloud cover in July - South 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).

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Average visibility in July
South Chatham, MA

Average visibility in July - South 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).

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South Chatham, Massachusetts, USA

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