San Mar, MD Climate


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United States / Maryland / Hagerstown-Martinsburg Metro Area / Washington County / San Mar / Zip Codes
San Mar, MD enjoys a mild climate year-round. The region experiences hot summers with temperatures reaching up to 80°F and cold winters with temperatures averaging around 30°F. Summer days are generally sunny, but the occasional afternoon thunderstorm is common. Snowfall is relatively light in San Mar, usually amounting to only a few inches each season. Rainfall averages around 37 inches per year, making it ideal for outdoor activities all year round.

Bestplaces Comfort Index

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

8.7 Summer - 5.5 Winter
June, September and August are the most pleasant months in San Mar, while January and February are the least comfortable months.

  ClimateSan Mar, MarylandUnited States
  41.7 in.38.1 in.
  19.8 in.27.8 in.
  114.6 days106.2 days
  197 days205 days
  86.5°85.8°
  21.0°21.7°
  7.37
  3.94.3
  554 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 San Mar with an average high temperature of 86.5°, which ranks it as cooler than most places in Maryland. In San Mar, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Mar are September, June and May.
In San Mar, there are 20.5 days annually when the high temperature is over 90°, which is cooler than most places in Maryland.
January has the coldest nighttime temperatures for San Mar with an average of 21.0°. This is colder than most places in Maryland.
In San Mar, there are 120.2 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Maryland.
In San Mar, there are 0.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Maryland.
The humidity is usually comfortable in San Mar 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 San Mar with 4.2 inches of rain, and the driest month is February with 2.4 inches. The wettest season is Summer with 28% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 41.7 inches in San Mar means that it is drier than most places in Maryland.
May is the rainiest month in San Mar with 11.9 days of rain, and October is the driest month with only 8.1 rainy days. There are 114.6 rainy days annually in San Mar, 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 19.8 inches in San Mar means that it is snowier than most places in Maryland. January is the snowiest month in San Mar with 7.0 inches of snow, and 5 months of the year have significant snowfall.
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