Rosemont, MD Climate


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United States / Maryland / Washington-Arlington-Alexandria Metro Area / Frederick County / Rosemont / Zip Codes
Rosemont, MD has a humid subtropical climate with mild winters and hot and humid summers. Average annual temperatures range from a low of 30°F in January to a high of 85°F in July. Precipitation is abundant throughout the year with an average of 46 inches per year. Snowfall is uncommon, averaging around 6 inches per winter season. The area also experiences frequent thunderstorms during the summertime months.

Rosemont, Maryland gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Rosemont averages 20 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 199 sunny days per year in Rosemont. The US average is 205 sunny days.

Rosemont gets some kind of precipitation, on average, 115 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 87 degrees
Winter Low: the January low is 22
Rain: averages 41 inches of rain a year
Snow: averages 20 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Rosemont is 7.3 (10=best), which means it is more comfortable than most places in Maryland.

8.5 Summer - 5.6 Winter
September, June and May are the most pleasant months in Rosemont, while January and February are the least comfortable months.

  ClimateRosemont, MarylandUnited States
  41.1 in.38.1 in.
  19.7 in.27.8 in.
  114.5 days106.2 days
  199 days205 days
  87.1°85.8°
  22.3°21.7°
  7.37
  4.24.3
  499 ft.2443 ft.
Climate
YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Rosemont with an average high temperature of 87.1°, which ranks it as about average compared to other places in Maryland. In Rosemont, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rosemont are September, May and June.
In Rosemont, there are 24.7 days annually when the high temperature is over 90°, which is about average compared to other places in Maryland.
January has the coldest nighttime temperatures for Rosemont with an average of 22.3°. This is colder than most places in Maryland.
In Rosemont, there are 111.1 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Maryland.
In Rosemont, there are 1.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Maryland.
The humidity is usually comfortable in Rosemont but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. The most humid months are July, August and June.
May is the wettest month in Rosemont with 4.2 inches of rain, and the driest month is February with 2.6 inches. The wettest season is Summer with 27% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 41.1 inches in Rosemont means that it is drier than most places in Maryland.
May is the rainiest month in Rosemont with 11.9 days of rain, and October is the driest month with only 8.1 rainy days. There are 114.5 rainy days annually in Rosemont, which is rainier than most places in Maryland. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 23% chance of a rainy day.
An annual snowfall of 19.7 inches in Rosemont means that it is snowier than most places in Maryland. January is the snowiest month in Rosemont with 7.0 inches of snow, and 5 months of the year have significant snowfall.
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