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 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 stands out as Preston's warmest month, with an average high-temperature of 84.6°F (29.2°C) and a low-temperature of 70.3°F (21.3°C).Heat index
The heat index value for July is computed to be a torrid 95°F (35°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.In reference to the heat index, it's for places in shade and with a slight wind. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
In Preston, the average relative humidity in July is 78%.Rainfall
The months with the most rainfall are July and August, with an average 2.01" (51mm) of precipitation.Snowfall
In Preston, Maryland, snow does not fall in April, June through October.Daylight
The average length of the day in July is 14h and 34min.On the first day of July, sunrise is at 5:42 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 6:04 am and sunset at 8:15 pm EDT.
Sunshine
July has the most sunshine of the year in Preston, with an average of 10.9h of sunshine.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 6 in July translates into this advice:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the warmest month?
How hot is July?
What is the average humidity in July?
What is the wettest month?
How many days does it rain in July?
When it does not snow?
How many hours of daylight does Preston have in July?
What time are sunrise and sunset in July?
What month has the most sunshine?
How long on average sun shines in July?
When is the highest UV index?
What is the UV index intensity in July?
Average temperature in July
Preston, MD
- Average high temperature in July: 84.6°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (41.2°F).
- Average low temperature in July: 70.3°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in July
Preston, MD
- Average pressure in July: 29.96"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in July
Preston, MD
- Average wind speed in July: 6.3mph
The windiest month (with the highest average wind speed) is February (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in July
Preston, MD
- Average humidity in July: 78%
The months with the highest relative humidity are May, August and September (79%).
The months with the lowest relative humidity are January, March and November (74%).
Average rainfall in July
Preston, MD
- Average rainfall in July: 2.01"
The wettest months (with the highest rainfall) are July and August (2.01").
The driest months (with the least rainfall) are January and September (0.94").
Average rainfall days in July
Preston, MD
- Average rainfall days in July: 16.1 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is November (7.2 days).
Average snowfall in July
Preston, MD
- Average snowfall in July: 0"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in July
Preston, MD
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (3 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).
Average daylight in July /
Average sunshine in July
Preston, MD
- Average daylight in July: 14h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in July: 10h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in July
Preston, MD
- Average sunshine days in July: 11.5 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is July (11.5 days).
Average UV index in July
Preston, MD
- 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, November and December (UV index 2).
Average cloud cover in July
Preston, MD
- Average cloud cover in July: 28
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in July
Preston, MD
- 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).
Preston, Maryland, USA
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