July weather forecast
Roslyn, PA

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Weather in July

July is a tropical summer month in Roslyn, Pennsylvania, with an average temperature fluctuating between 68.2°F (20.1°C) and 86.2°F (30.1°C).

Temperature

July registers as the month with the highest average temperatures, reaching 86.2°F (30.1°C) at its peak and 68.2°F (20.1°C) at the lowest.

Heat index

The heat index value for July is appraised at a torrid 96.8°F (36°C). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
The standards for the heat index are set for locations in shade and under light breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The months with the lowest humidity are April, July and August, with an average relative humidity of 72%.

Rainfall

In July, the rain falls for 13.9 days. Throughout July, 1.42" (36mm) of precipitation is accumulated. In Roslyn, during the entire year, the rain falls for 122.4 days and collects up to 12.68" (322mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In July, the average length of the day is 14h and 41min.
On the first day of the month, sunrise is at 5:35 am and sunset at 8:33 pm. On the last day of July, sunrise is at 5:58 am and sunset at 8:15 pm EDT.

Sunshine

The month with the most sunshine is July, with an average of 10.7h of sunshine.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A typical high UV index of 6 in July suggests the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the warmest month?

Roslyn's warmest month, July, registers temperatures that range from a high of 86.2°F (30.1°C) to a low of 68.2°F (20.1°C).

How hot does it get in July?

The high-temperature during July is 86.2°F (30.1°C) and the low-temperature is 68.2°F (20.1°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in July is appraised at 96.8°F (36°C).

What are the least humid months?

April, July and August, with an average relative humidity of 72%, are the least humid months in Roslyn.

What is the average humidity in July?

The average relative humidity in July is 72%.

How many days does it rain in July in Roslyn?

In July, the rain falls for 13.9 days. Throughout July, 1.42" (36mm) of precipitation is accumulated.

When it does not snow?

In Roslyn, snow does not fall in May through October.

How many hours of daylight does Roslyn have in July?

In July, the average day length is 14h and 41min.

When is the sunrise / sunset in July?

In July, on the first day of the month, sunrise is at 5:35 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 5:58 am and sunset at 8:15 pm EDT.

What month has the most sunshine in Roslyn?

The month with the most sunshine is July, with an average of 10.7h of sunshine.

How many hours of sunshine does Roslyn have in July?

In July, the average sunshine duration is 10.7h.

What is the month with the highest UV index?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

How high is the UV index in July?

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 the Sun's 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
Roslyn, PA

Average temperature in July - Roslyn, PA
  • Average high temperature in July: 86.2°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in July: 68.2°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).

Average pressure in July
Roslyn, PA

Average pressure in July - Roslyn, PA
  • Average pressure in July: 29.96"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in July
Roslyn, PA

Average wind speed in July - Roslyn, PA
  • Average wind speed in July: 5.5mph

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in July
Roslyn, PA

Average humidity in July - Roslyn, PA
  • Average humidity in July: 72%

The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April, July and August (72%).

Average rainfall in July
Roslyn, PA

Average rainfall in July - Roslyn, PA
  • Average rainfall in July: 1.42"

The wettest month (with the highest rainfall) is August (1.54").
The driest month (with the least rainfall) is September (0.75").

Average rainfall days in July
Roslyn, PA

Average rainfall days in July - Roslyn, PA
  • Average rainfall days in July: 13.9 days

The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is November (6.4 days).

Average snowfall in July
Roslyn, PA

Average snowfall in July - Roslyn, PA
  • Average snowfall in July: 0"

The month with the highest snowfall is February (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in July
Roslyn, PA

Average snowfall days in July - Roslyn, PA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in July /
Average sunshine in July
Roslyn, PA

Average daylight in July / Average sunshine in July - Roslyn, PA
  • 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 4min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in July
Roslyn, PA

Average sunshine days in July - Roslyn, PA
  • Average sunshine days in July: 14.7 days

The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (14.4 days).

Average UV index in July
Roslyn, PA

Average UV index in July - Roslyn, PA
  • Average UV index in July: 6

The months with the highest UV index are May, June, 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
Roslyn, PA

Average cloud cover in July - Roslyn, PA
  • Average cloud cover in July: 31

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in July
Roslyn, PA

Average visibility in July - Roslyn, PA
  • Average visibility in July: 6mi

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

Roslyn, Pennsylvania, USA

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