Zip 20850 (Rockville, MD) 

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Climate in Zip 20850 (Rockville, MD)

Rockville (zip 20850), Maryland gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Rockville (zip 20850) averages 20 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 201 sunny days per year in Rockville (zip 20850). The US average is 205 sunny days.

Rockville (zip 20850) gets some kind of precipitation, on average, 114 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 84 degrees
Winter Low: the January low is 25
Rain: averages 42 inches of rain a year
Snow: averages 20 inches of snow a year


SPERLING'S COMFORT INDEX
Rockville (zip 20850) ranks 53/100 for Comfort Index

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 54. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.

CLIMATE

Climate Averages
  Rockville, MarylandUnited States
  41.9 in.38.1 in.
  19.6 in.27.8 in.
  113.8 days106.2 days
  201 days205 days
  83.7°85.8°
  24.8°21.7°
  5354
  4.14.3
  384 ft.2443 ft.

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 the 20850 zip code with an average high temperature of 83.7°, which ranks it as one of the coolest places in Maryland. In the 20850 zip code, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 20850 zip code are June, September and August.


January has the coldest nighttime temperatures for the 20850 zip code with an average of 24.8°. This is about average compared to other places in Maryland.


In the 20850 zip code, there are 8.9 days annually when the high temperature is over 90°, which is one of the coolest places in Maryland.


In the 20850 zip code, there are 90.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Maryland.


In the 20850 zip code, there are 0.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Maryland.


May is the wettest month in the 20850 zip code with 4.3 inches of rain, and the driest month is February with 2.7 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 41.9 inches in the 20850 zip code means that it is drier than most places in Maryland.


May is the rainiest month in the 20850 zip code with 11.8 days of rain, and August is the driest month with only 8.3 rainy days. There are 113.8 rainy days annually in the 20850 zip code, which is about average compared to other 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 19.6 inches in the 20850 zip code means that it is snowier than most places in Maryland.



January is the snowiest month in the 20850 zip code with 7.9 inches of snow, and 5 months of the year have significant snowfall.


CLIMATE MAP
  • Annual Rainfall (US Avg: 36.5")
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    Rockville (zip 20850)

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