July weather forecast
Jefferson, MD

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Weather in July

July in Jefferson, Maryland, is a hot summer month, with an average temperature fluctuating between 69.1°F (20.6°C) and 87.6°F (30.9°C).

Temperature

July is the month when Jefferson's temperatures reach their peak, with averages of 87.6°F (30.9°C) and lows of 69.1°F (20.6°C).

Heat index

July's heat index is computed to be a very hot 100.4°F (38°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

April and July, with an average relative humidity of 71%, are the least humid months in Jefferson.

Rainfall

In Jefferson, Maryland, during July, the rain falls for 16.8 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, there are 161.2 rainfall days, and 31.54" (801mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Jefferson.

Daylight

The average length of the day in July is 14h and 37min.
On the first day of July, sunrise is at 5:47 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 8:23 pm EDT.

Sunshine

With an average of 10.9h of sunshine, July has the most sunshine of the year.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Jefferson. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 6 in July translates into this advice:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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Frequently asked questions

What are the warmest months in Jefferson?

Jefferson's warmest weather arrives in July, when temperatures average a high of 87.6°F (30.9°C) and a low of 69.1°F (20.6°C).

Is it hot in Jefferson during July?

In July, in Jefferson, the average high-temperature is 87.6°F (30.9°C), and the average low-temperature is 69.1°F (20.6°C). In July, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is computed to be 100.4°F (38°C).

What are the least humid months in Jefferson?

April and July, with an average relative humidity of 71%, are the least humid months in Jefferson.

What is the average humidity in July in Jefferson?

In July, the average relative humidity is 71%.

How many days does it rain in July in Jefferson?

In July, the rain falls for 16.8 days. Throughout July, 3.03" (77mm) of precipitation is accumulated.

When it does not snow in Jefferson?

May through October are months without snowfall in Jefferson.

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

In July, the average day length is 14h and 37min.

When is the sunrise / sunset in July in Jefferson?

In July, on the first day of the month, sunrise is at 5:47 am and sunset at 8:40 pm. On the last day of the month, in Jefferson, sunrise is at 6:09 am and sunset at 8:23 pm EDT.

What month has the most sunshine in Jefferson?

July has the most sunshine of the year, with an average of 10.9h of sunshine.

How long on average sun shines in July in Jefferson?

In Jefferson, the average sunshine duration in July is 10.9h.

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

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

What is the UV index intensity in July in Jefferson?

In Jefferson, the average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health threat 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
Jefferson, MD

Average temperature in July - Jefferson, MD
  • Average high temperature in July: 87.6°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (40.5°F).

  • Average low temperature in July: 69.1°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).

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Average pressure in July
Jefferson, MD

Average pressure in July - Jefferson, MD
  • Average pressure in July: 29.97"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in July
Jefferson, MD

Average wind speed in July - Jefferson, MD
  • Average wind speed in July: 4.9mph

The windiest month (with the highest average wind speed) is March (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in July
Jefferson, MD

Average humidity in July - Jefferson, MD
  • Average humidity in July: 71%

The month with the highest relative humidity is October (77%).
The months with the lowest relative humidity are April and July (71%).

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Average rainfall in July
Jefferson, MD

Average rainfall in July - Jefferson, MD
  • Average rainfall in July: 3.03"

The wettest month (with the highest rainfall) is August (3.78").
The driest month (with the least rainfall) is January (2.05").

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Average rainfall days in July
Jefferson, MD

Average rainfall days in July - Jefferson, MD
  • Average rainfall days in July: 16.8 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (8.9 days).

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Average snowfall in July
Jefferson, MD

Average snowfall in July - Jefferson, MD
  • Average snowfall in July: 0"

The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in July
Jefferson, MD

Average snowfall days in July - Jefferson, MD
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (4.9 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
Jefferson, MD

Average daylight in July / Average sunshine in July - Jefferson, MD
  • Average daylight in July: 14h and 4min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in July: 10h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 12min).

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Average sunshine days in July
Jefferson, MD

Average sunshine days in July - Jefferson, MD
  • Average sunshine days in July: 10.9 days

The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is July (10.9 days).

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Average UV index in July
Jefferson, MD

Average UV index in July - Jefferson, 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).

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Average cloud cover in July
Jefferson, MD

Average cloud cover in July - Jefferson, MD
  • Average cloud cover in July: 30

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in July
Jefferson, MD

Average visibility in July - Jefferson, MD
  • 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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Jefferson, Maryland, USA

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