July weather forecast
Onset, MA

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Weather in July

July is a warm summer month in Onset, Massachusetts, with an average temperature ranging between max 75.6°F (24.2°C) and min 66.4°F (19.1°C).

Temperature

July, having an average high-temperature of 75.6°F (24.2°C) and an average low-temperature of 66.4°F (19.1°C), is the warmest month.

Humidity

The months with the highest humidity are June and July, with an average relative humidity of 81%.

Rainfall

In July, in Onset, the rain falls for 16 days. Throughout July, 2.52" (64mm) of precipitation is accumulated. Throughout the year, in Onset, there are 157.4 rainfall days, and 32.2" (818mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Ocean temperature

In July, the average ocean temperature is 66.2°F (19°C).
Note: Swimming in 66.2°F (19°C) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 69.8°F (21°C).

Daylight

In Onset, Massachusetts, the average length of the day in July is 14h and 51min.
On the first day of July in Onset, Massachusetts, sunrise is at 5:12 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:01 pm EDT.

Sunshine

In July, the average sunshine is 10.5h.

UV index

July and August, with an average maximum UV index of 6, are months with the highest UV index in Onset. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 6 during July translates into the following recommendations:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

What is the hottest time of year in Onset?

July is the warmest month in Onset, Massachusetts, with the temperature often reaching an average high of 75.6°F (24.2°C) and an average low of 66.4°F (19.1°C).

What is the temperature in July in Onset?

The high-temperature, in July, in Onset, is 75.6°F (24.2°C), while the low-temperature averages to 66.4°F (19.1°C).

What are the most humid months in Onset?

The months with the highest humidity in Onset, Massachusetts, are June and July, with an average relative humidity of 81%.

What is the average humidity in July in Onset?

The average relative humidity in July is 81%.

How much does it rain in Onset in July?

In Onset, Massachusetts, in July, it is raining for 16 days, with typically 2.52" (64mm) of accumulated precipitation.

When it does not snow in Onset?

May through September are months without snowfall in Onset.

What is the ocean temperature in July in Onset?

In Onset, Massachusetts, in July, the average water temperature is 66.2°F (19°C). Swimming in 66.2°F (19°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Onset have in July?

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

When is the sunrise / sunset in July in Onset?

In July, on the first day of the month, sunrise is at 5:12 am and sunset at 8:21 pm. On the last day of the month, in Onset, sunrise is at 5:36 am and sunset at 8:01 pm EDT.

How many hours of sunshine does Onset have in July?

The average sunshine duration in July is 10.5h.

When is the highest UV index in Onset?

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

How high is the UV index in July in Onset?

In Onset, Massachusetts, the average daily maximum UV index in July is 6. A UV Index reading of 6 to 7 represents a high health threat from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJulyASOND
Jun
July
Aug
Average high temperature
67.6°F 19.8°C
75.6°F 24.2°C
75.2°F 24°C
Average low temperature
58.5°F 14.7°C
66.4°F 19.1°C
66.7°F 19.3°C
Average pressure
29.93" 760mmHg
29.95" 761mmHg
29.98" 761mmHg
Average wind speed
9.4mph 15.1km/h
8.8mph 14.2km/h
8.7mph 14km/h
Average max. wind speed
10.1mph 16.3km/h
9.4mph 15.1km/h
9.3mph 15km/h
Average wind speed gusts
16.5mph 26.6km/h
15.3mph 24.6km/h
14.5mph 23.3km/h
Average humidity
81%
81%
79%
Average rainfall
2.52" 64mm
2.52" 64mm
2.09" 53mm
Average rainfall days
14.7
16
14.1
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0
0
0
Average sea temperature
58.6°F 14.8°C
66.2°F 19°C
68.4°F 20.2°C
Average daylight
15h 1min
14h 5min
13h 5min
Average sunshine
9h 3min
10h 3min
10h 4min
Average sunshine days
13.8
13.2
14.3
Average UV index
5
6
6
Average cloud cover
37%
30%
28%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in July
Onset, MA

Average temperature in July - Onset, MA
  • Average high temperature in July: 75.6°F

The warmest month (with the highest average high temperature) is July (75.6°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in July: 66.4°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

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Average pressure in July
Onset, MA

Average pressure in July - Onset, MA
  • Average pressure in July: 29.95"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
Onset, MA

Average wind speed in July - Onset, MA
  • Average wind speed in July: 8.8mph

The windiest month (with the highest average wind speed) is January (13.7mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

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Average humidity in July
Onset, MA

Average humidity in July - Onset, MA
  • Average humidity in July: 81%

The months with the highest relative humidity are June and July (81%).
The months with the lowest relative humidity are March and November (74%).

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Average rainfall in July
Onset, MA

Average rainfall in July - Onset, MA
  • Average rainfall in July: 2.52"

The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days in July
Onset, MA

Average rainfall days in July - Onset, MA
  • Average rainfall days in July: 16 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (9 days).

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Average snowfall in July
Onset, MA

Average snowfall in July - Onset, MA
  • Average snowfall in July: 0"

The months with the highest snowfall are February and March (2.28").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in July
Onset, MA

Average snowfall days in July - Onset, 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 and September (0 days).

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Average sea temperature in July
Onset, MA

Average sea temperature in July - Onset, MA
  • Average sea temperature in July: 66.2°F

The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).

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Average daylight in July /
Average sunshine in July
Onset, MA

Average daylight in July / Average sunshine in July - Onset, 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 months with the least sunshine are February and December (Average sunshine: 4h and 48min).

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Average sunshine days in July
Onset, MA

Average sunshine days in July - Onset, MA
  • Average sunshine days in July: 13.2 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is April (12.5 days).

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Average UV index in July
Onset, MA

Average UV index in July - Onset, 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
Onset, MA

Average cloud cover in July - Onset, MA
  • Average cloud cover in July: 30

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in July
Onset, MA

Average visibility in July - Onset, 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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Onset, Massachusetts, USA

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