July weather forecast
Charlestown, MD

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Weather in July

July, like June, in Charlestown, Maryland, is another warm summer month, with an average temperature varying between 67.6°F (19.8°C) and 84.7°F (29.3°C).

Temperature

Charlestown's July weather, with an average high temperature of 84.7°F (29.3°C) and an average low temperature of 67.6°F (19.8°C), tends to be the warmest of the year.

Heat index

The heat index value for July is evaluated at a fiery hot 95°F (35°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Note that heat index values are valued for light wind and location in the shade. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In Charlestown, the average relative humidity in July is 77%.

Rainfall

In July, the rain falls for 16.4 days. Throughout July, 3.43" (87mm) of precipitation is accumulated. Throughout the year, in Charlestown, there are 150.3 rainfall days, and 29.25" (743mm) of precipitation is accumulated.

Snowfall

In Charlestown, snow does not fall in April, June through October.

Ocean temperature

In July, the average ocean temperature in Charlestown, Maryland, is 74.3°F (23.5°C).
Note: While a person's sensitivity to cold is personal, factors like sunshine, wind, and the temperature can influence their comfort in 74.3°F (23.5°C) waters. Olympians, for perspective, swim in waters between 77°F (25°C) and 82.4°F (28°C).

Daylight

In July, the average length of the day is 14h and 38min.
On the first day of July, sunrise is at 5:40 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 8:17 pm EDT.

Sunshine

With an average of 10.7h of sunshine, July has the most sunshine of the year in Charlestown.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index, 6 during July, leads to the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Watch out! Reflections from sand and water can surge UV radiation exposure.
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Frequently asked questions

What is the hottest time of year in Charlestown?

In Charlestown, July is known for its average highest temperatures, reaching a high of 84.7°F (29.3°C) and a low of 67.6°F (19.8°C).

How hot is July in Charlestown?

July temperatures in Charlestown vary between a high-temperature of 84.7°F (29.3°C) and a low-temperature of 67.6°F (19.8°C). In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, is evaluated at 95°F (35°C).

What is the average humidity in July in Charlestown?

In Charlestown, Maryland, the average relative humidity in July is 77%.

How many days does it rain in July in Charlestown?

In July, in Charlestown, the rain falls for 16.4 days. Throughout July, 3.43" (87mm) of precipitation is accumulated.

When it does not snow in Charlestown?

In Charlestown, Maryland, snow does not fall in April, June through October.

How warm is the water in July in Charlestown?

In July, the average ocean temperature in Charlestown is 74.3°F (23.5°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 74.3°F (23.5°C) water may be enjoyable.

How many hours of daylight does Charlestown have in July?

The average day length in July is 14h and 38min.

When are sunrise and sunset in July in Charlestown?

In July, on the first day of the month, sunrise is at 5:40 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 8:17 pm EDT.

What month has the most sunshine in Charlestown?

With an average of 10.7h of sunshine, July has the most sunshine of the year.

How long on average sun shines in July in Charlestown?

In Charlestown, the average sunshine duration in July is 10.7h.

What is the month with the highest UV index in Charlestown?

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

What is the UV index intensity in July in Charlestown?

In July, the average daily maximum UV index in Charlestown, Maryland, is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJulyASOND
Jun
July
Aug
Average high temperature
79.5°F 26.4°C
84.7°F 29.3°C
82.8°F 28.2°C
Average low temperature
62.4°F 16.9°C
67.6°F 19.8°C
65.7°F 18.7°C
Average pressure
29.94" 760mmHg
29.96" 761mmHg
29.99" 762mmHg
Average wind speed
6.4mph 10.3km/h
5.4mph 8.7km/h
5.3mph 8.5km/h
Average max. wind speed
7mph 11.3km/h
5.8mph 9.3km/h
5.8mph 9.3km/h
Average wind speed gusts
10.2mph 16.4km/h
8.6mph 13.8km/h
8.5mph 13.7km/h
Average humidity
79%
77%
78%
Average rainfall
2.6" 66mm
3.43" 87mm
3.86" 98mm
Average rainfall days
15.3
16.4
15.6
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0
0
0
Average sea temperature
66.6°F 19.2°C
74.4°F 23.6°C
76.3°F 24.6°C
Average daylight
14h 5min
14h 4min
13h 4min
Average sunshine
10h 1min
10h 4min
10h 1min
Average sunshine days
11.8
11.6
13.2
Average UV index
6
6
6
Average cloud cover
35%
31%
32%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in July
Charlestown, MD

Average temperature in July - Charlestown, MD
  • 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 (37.9°F).

  • Average low temperature in July: 67.6°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in July
Charlestown, MD

Average pressure in July - Charlestown, 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).

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Average wind speed in July
Charlestown, MD

Average wind speed in July - Charlestown, MD
  • Average wind speed in July: 5.4mph

The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in July
Charlestown, MD

Average humidity in July - Charlestown, MD
  • Average humidity in July: 77%

The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in July
Charlestown, MD

Average rainfall in July - Charlestown, MD
  • Average rainfall in July: 3.43"

The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (1.85").

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Average rainfall days in July
Charlestown, MD

Average rainfall days in July - Charlestown, MD
  • Average rainfall days in July: 16.4 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in July
Charlestown, MD

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

The month with the highest snowfall is January (2.24").
The months with the least snowfall are April, June, July, August, September and October (0").

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Average snowfall days in July
Charlestown, MD

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

The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).

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Average sea temperature in July
Charlestown, MD

Average sea temperature in July - Charlestown, MD
  • Average sea temperature in July: 74.4°F

The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (40.9°F).

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Average daylight in July /
Average sunshine in July
Charlestown, MD

Average daylight in July / Average sunshine in July - Charlestown, 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 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 54min).

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Average sunshine days in July
Charlestown, MD

Average sunshine days in July - Charlestown, MD
  • Average sunshine days in July: 11.6 days

The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is July (11.6 days).

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Average UV index in July
Charlestown, MD

Average UV index in July - Charlestown, 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, February, November and December (UV index 2).

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Average cloud cover in July
Charlestown, MD

Average cloud cover in July - Charlestown, MD
  • Average cloud cover in July: 31

The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in July
Charlestown, MD

Average visibility in July - Charlestown, MD
  • 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).

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Charlestown, Maryland, USA

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