Climate change in Hagerstown, Maryland

Climate change is affecting locations like Hagerstown in a variety of ways. In fall, these impacts include heavier rainfall, more unusually warm days, and more intense hurricanes.

Explore these pages to learn how people in Hagerstown are at risk in a warming world.

Since 1970, average annual temperatures in Hagerstown have gotten 2.6°F warmer, reflecting an overall warming trend.

Warming puts people and ecosystems at risk from more frequent and intense extreme weather.
Overall, the contiguous U.S. is about 2.8°F warmer today than in 1970, based on average temperatures.
Data source: NOAA ACIS

Since 1970, Hagerstown's annual precipitation has increased by 2.1 inches.

Climate change is supercharging the water cycle and bringing heavier precipitation extremes across the U.S.
For every 1°F of warming, the air can hold 4% more moisture, increasing the chances of heavier downpours that contribute to flash flooding hazards.
Data source: NOAA ACIS

As of November 4, 2026, Hagerstown has experienced 38 days this year with temperatures made twice as likely by climate change.

This is according to the Climate Shift Index (CSI), which quantifies the influence of human-caused climate change on daily average temperatures. Temperatures on these days had a CSI level 2 or higher, which indicates local temperatures were at least two times more likely due to climate change.
The CSI ranges from -5 to +5. Positive levels indicate temperatures made more likely due to climate change (while negative scores indicate conditions made less likely).
Data source: Climate Shift Index

Hagerstown's climate threats in include:

The amount of rainfall during the heaviest rain events each year in the Northeast has increased by 60% since 1958.

Climate change is supercharging the water cycle, bringing heavier precipitation extremes across the U.S.
This chart shows how the amount of rainfall during the top 1% heaviest rain events each year in the Northeast increased between 1958 to 2021.
Data source: Fifth National Climate Assessment

Hagerstown has experienced 13 more extremely hot days (with temperatures at or above 91°F) since 1970.

More frequent and intense extreme heat — the deadliest type of weather in the U.S. — is a direct result of a warming planet.
Extremely hot days are defined as days with maximum temperatures hotter than 95% of local temperatures from 1991-2020.
Data source: NOAA ACIS

Since 1970, average fall temperatures in Hagerstown have gotten 1.5°F warmer, reflecting an overall warming trend.

Fall warming means that risky heat, fire weather, and allergies linger later into the year.
Data source: NOAA ACIS

Explore some ways climate change is affecting Hagerstown in fall

Heavier rainfall

Hourly rainfall intensity — a key factor in flash floods — has increased in 129 cities across the U.S. since 1970.

Key concepts:

Climate change is supercharging the water cycle, bringing heavier rainfall extremes and related flood risks across the U.S.
Some 129 U.S. cities (90% of 144 analyzed) have experienced an increase in hourly rainfall intensity since 1970.
People and ecosystems in both wet and dry locations are facing the risks that come with heavier rainfall in our warming climate.

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More warm fall days

Fall (September-November) has warmed nationwide since 1970.

Key concepts:

Fall (September - November) has warmed nationwide since 1970.
Warming is nationwide, strongest in the Southwest.
Hotter falls extend risks from heat, wildfire, allergies, and more.

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More intense hurricanes

Warmer oceans from climate change fuel stronger hurricanes.

Key concepts:

Warmer oceans from climate change fuel stronger Atlantic hurricanes with heavier rain and higher storm surge.
Rising seas amplify storm surge, increasing risks for coastal residents.
Warmer air holds more moisture, driving heavier downpours and flooding.

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Impacts to food prices

Extreme events fueled by climate change can damage crops, reduce yields, and disrupt supply chains.

Key concepts:

Food and climate change are closely linked. Food systems account for about one-quarter of all heat-trapping pollution.
Meanwhile, extreme events fueled by climate change can damage crops, reduce yields, and disrupt supply chains — all of which can drive food prices higher.
The availability, quality, and affordability of food reflect a complex set of climatic and socioeconomic factors. Emerging research is providing insight into the role of climate change.

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Climate change in Hagerstown, Maryland

Hagerstown's climate threats in fall include:

Explore some ways climate change is affecting Hagerstown in fall

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Hagerstown's climate threats in include: