July weather - Summer 2024

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 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

An ancient stone building still stands strong in the neat fields and scenic trees of Princeton University, New Jersey

Weather in July

July stands as the warmest month in Princeton, with an astounding peak temperature of 84.7°F (29.3°C). Alongside the heat, it also registers the highest amount of rainfall leading to humid days. The kicked-up humidity, combined with soaring temperatures, paves the way for occasional summer showers. While, the decrease in wind speed from the previous months, augments the heat effect. When put in comparison to June, July reveals towering temperatures, a significant amount of rainfall, and reduced wind speed.

Temperature

In Princeton, the highest average temperatures are observed in July, with a high of 84.7°F (29.3°C) and a low of 66.9°F (19.4°C).

Heat index

The heat index in July is estimated at a tropical 93.2°F (34°C). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.

Humidity

In Princeton, the average relative humidity in July is 75%.

Rainfall

The month with the most rainfall is July, when the rain falls for 13.9 days and typically aggregates up to 1.69" (43mm) of precipitation.

Snowfall

June through October are months without snowfall in Princeton.

Daylight

In Princeton, the average length of the day in July is 14h and 43min.
On the first day of July in Princeton, sunrise is at 5:32 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 8:14 pm EDT.

Sunshine

With an average of 10.5h of sunshine, July has the most sunshine of the year in Princeton.

UV index

The months with the highest UV index in Princeton are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 6 during July translates into the following guidance:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.

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Frequently asked questions

What month is the hottest in Princeton?

Princeton's warmest weather arrives in July, when temperatures average a high of 84.7°F (29.3°C) and a low of 66.9°F (19.4°C).

How hot is July in Princeton?

In Princeton, in July, the average high-temperature is 84.7°F (29.3°C), and the average low-temperature is 66.9°F (19.4°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in July is estimated at 93.2°F (34°C).

What is the average humidity in July in Princeton?

In July, the average relative humidity in Princeton is 75%.

What is the rainiest month in Princeton?

The month with the most rainfall in Princeton, New Jersey, is July, when the rain falls for 13.9 days and typically aggregates up to 1.69" (43mm) of precipitation.

How much does it rain in Princeton in July?

In Princeton, New Jersey, in July, during 13.9 rainfall days, 1.69" (43mm) of precipitation is typically accumulated.

When it does not snow in Princeton?

In Princeton, New Jersey, snow does not fall in June through October.

What is the average length of the day in July in Princeton?

In July, the average day length is 14h and 43min.

When is the sunrise / sunset in July in Princeton?

In July, on the first day of the month, sunrise is at 5:32 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 8:14 pm EDT.

What month has the most sunshine in Princeton?

July has the most sunshine of the year in Princeton, with an average of 10.5h of sunshine.

How many hours of sunshine does Princeton have in July?

In July, the average sunshine duration in Princeton, New Jersey, is 10.5h.

What are the months with the highest UV index in Princeton?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Princeton.

What is the UV index reading in July in Princeton?

In Princeton, the average daily maximum UV index in July is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J July A S O N D

Jun

July

Aug

Average high temperature

78.4°F 25.8°C

84.7°F 29.3°C

82.9°F 28.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6.8mph 10.9km/h

6mph 9.7km/h

5.9mph 9.5km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

15.7

13.3

16.3

Average UV index

Average cloud cover

37%

33%

Average visibility

6mi 9.7km

Average temperature in July
Princeton, NJ

Average high temperature in July: 84.7°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.9°F).

Average low temperature in July: 66.9°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in July
Princeton, NJ

Average pressure in July: 29.96"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in July
Princeton, NJ

Average wind speed in July: 5.5mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in July
Princeton, NJ

Average humidity in July: 75%

The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in July
Princeton, NJ

Average rainfall in July: 1.69"

The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is September (0.67").

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Average rainfall days in July
Princeton, NJ

Average rainfall days in July: 13.9 days

The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is January (6.1 days).

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Average snowfall in July
Princeton, NJ

Average snowfall in July: 0"

The month with the highest snowfall is March (1.42").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in July
Princeton, NJ

Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in July /
Average sunshine in July
Princeton, NJ

Average daylight in July: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

Average sunshine in July: 10h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in July
Princeton, NJ

Average sunshine days in July: 13.3 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in July
Princeton, NJ

Average UV index in July: 6

The months with the highest UV index are June, 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
Princeton, NJ

Average cloud cover in July: 33

The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 33).

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Average visibility in July
Princeton, NJ

Average visibility in July: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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July weather forecast
Princeton, NJ

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