July weather forecast
Marriottsville, MD

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Weather in July

July, the same as June, is a moderately hot summer month in Marriottsville, Maryland, with temperature in the range of an average high of 84.7°F (29.3°C) and an average low of 66.7°F (19.3°C).

Temperature

July, noted for its average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 66.7°F (19.3°C), is considered the warmest month.

Heat index

July's average heat index is computed to be a tropical 93.2°F (34°C). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The months with the lowest humidity in Marriottsville are April and July, with an average relative humidity of 74%.

Rainfall

In Marriottsville, during July, the rain falls for 17.4 days and regularly aggregates up to 3.23" (82mm) of precipitation. In Marriottsville, during the entire year, the rain falls for 159 days and collects up to 31.61" (803mm) of precipitation.

Snowfall

June through October are months without snowfall.

Daylight

The average length of the day in July in Marriottsville, Maryland, is 14h and 37min.
On the first day of the month, sunrise is at 5:44 am and sunset at 8:38 pm. On the last day of July, in Marriottsville, sunrise is at 6:07 am and sunset at 8:20 pm EDT.

Sunshine

With an average of 10.6h 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. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In July, the UV index of 6 transforms into the following advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Frequently asked questions

What month is the hottest in Marriottsville?

Marriottsville's July weather, marked by an average high temperature of 84.7°F (29.3°C) and an average low temperature of 66.7°F (19.3°C), is the warmest in the year.

How hot is July in Marriottsville?

The high-temperature, in July, in Marriottsville, is 84.7°F (29.3°C), while the low-temperature averages to 66.7°F (19.3°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in July is computed to be 93.2°F (34°C).

What is the least humid month in Marriottsville?

The months with the lowest humidity in Marriottsville, Maryland, are April and July, with an average relative humidity of 74%.

What is the average humidity in July in Marriottsville?

The average relative humidity in July in Marriottsville is 74%.

How many days does it rain in July in Marriottsville?

In Marriottsville, Maryland, in July, it is raining for 17.4 days, with typically 3.23" (82mm) of accumulated precipitation.

When it does not snow in Marriottsville?

June through October are months without snowfall in Marriottsville.

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

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

When is the sunrise / sunset in July in Marriottsville?

In July, on the first day of the month, sunrise is at 5:44 am and sunset at 8:38 pm. On the last day of the month, in Marriottsville, sunrise is at 6:07 am and sunset at 8:20 pm EDT.

What month has the most sunshine in Marriottsville?

July has the most sunshine of the year in Marriottsville, with an average of 10.6h of sunshine.

How many hours of sunshine does Marriottsville have in July?

The average sunshine duration in July in Marriottsville, Maryland, is 10.6h.

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

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 in Marriottsville?

In Marriottsville, the average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to Sun's UV rays.
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
Marriottsville, MD

Average temperature in July - Marriottsville, 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 (37.6°F).

  • Average low temperature in July: 66.7°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (25°F).

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Average pressure in July
Marriottsville, MD

Average pressure in July - Marriottsville, 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 (29.94"Hg).

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Average wind speed in July
Marriottsville, MD

Average wind speed in July - Marriottsville, MD
  • Average wind speed in July: 5.3mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

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Average humidity in July
Marriottsville, MD

Average humidity in July - Marriottsville, MD
  • Average humidity in July: 74%

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

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Average rainfall in July
Marriottsville, MD

Average rainfall in July - Marriottsville, MD
  • Average rainfall in July: 3.23"

The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is February (1.97").

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Average rainfall days in July
Marriottsville, MD

Average rainfall days in July - Marriottsville, MD
  • Average rainfall days in July: 17.4 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (8.6 days).

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Average snowfall in July
Marriottsville, MD

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

The month with the highest snowfall is March (2.8").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in July
Marriottsville, MD

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

The month with the highest number of snowfall days is January (5.6 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
Marriottsville, MD

Average daylight in July / Average sunshine in July - Marriottsville, 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 30min).

  • Average sunshine in July: 10h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 48min).

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Average sunshine days in July
Marriottsville, MD

Average sunshine days in July - Marriottsville, MD
  • Average sunshine days in July: 11.8 days

The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (11.2 days).

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Average UV index in July
Marriottsville, MD

Average UV index in July - Marriottsville, 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
Marriottsville, MD

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

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

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Average visibility in July
Marriottsville, MD

Average visibility in July - Marriottsville, 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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Marriottsville, Maryland, USA

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