Outdoor conditions in

Mercersburg

Pennsylvania
Now
  1. 61°Chance Rain Showers37% rain75% humidityGusts 7 mph
  2. 61°Chance Rain Showers49% rain78% humidityGusts 8 mph
  3. 62°Chance Rain Showers48% rain75% humidityGusts 8 mph
  4. 60°Chance Rain Showers35% rain84% humidityGusts 8 mph
  5. 60°Chance Rain Showers29% rain84% humidityGusts 8 mph
  6. 60°Slight Chance Rain Showers22% rain84% humidityGusts 9 mph
  7. 59°Slight Chance Light Rain16% rain87% humidityGusts 9 mph
  8. 58°Cloudy12% rain93% humidityGusts 10 mph
  9. 58°Slight Chance Light Rain21% rain93% humidityGusts 12 mph
  10. 58°Chance Light Rain39% rain93% humidityGusts 13 mph
  11. 57°Chance Light Rain31% rain100% humidityGusts 14 mph
  12. 58°Chance Light Rain34% rain96% humidityGusts 14 mph
  13. 58°Slight Chance Light Rain23% rain100% humidityGusts 15 mph
  14. 58°Slight Chance Light Rain19% rain100% humidityGusts 16 mph
  15. 59°Slight Chance Light Rain17% rain100% humidityGusts 17 mph
  16. 60°Slight Chance Light Rain15% rain96% humidityGusts 17 mph
  17. 60°Cloudy14% rain100% humidityGusts 17 mph
  18. 60°Mostly Cloudy14% rain100% humidityGusts 15 mph
  19. 61°Partly Sunny2% rain100% humidityGusts 14 mph
  20. 65°Partly Sunny2% rain93% humidityGusts 15 mph
  21. 72°Mostly Sunny0% rain79% humidityGusts 14 mph
  22. 75°Mostly Sunny0% rain76% humidityGusts 14 mph
  23. 78°Sunny0% rain71% humidityGusts 17 mph
  24. 82°Sunny0% rain61% humidityGusts 21 mph
Extra care for

A little farther out

The next five days

Today

Today has a real shower chance.

Rain
49%
Humidity
72–93%
Wind
13 mph
Fri

Friday carries a thunderstorm chance.

Rain
53%
Humidity
56–100%
Wind
25 mph
Sat

Saturday looks breezy.

Rain
20%
Humidity
43–86%
Wind
30 mph
Sun

Sunday looks fairly quiet.

Rain
10%
Humidity
43–78%
Wind
9 mph
Mon

Monday looks fairly quiet.

Rain
12%
Humidity
53–85%
Wind
9 mph
  1. 62° / 58°Today has a real shower chance.49% rain · Humidity 72–93% · Wind 13 mph
  2. 82° / 57°Friday carries a thunderstorm chance.53% rain · Humidity 56–100% · Wind 25 mph
  3. 58° / 40°Saturday looks breezy.20% rain · Humidity 43–86% · Wind 30 mph
  4. 57° / 34°Sunday looks fairly quiet.10% rain · Humidity 43–78% · Wind 9 mph
  5. 61° / 38°Monday looks fairly quiet.12% rain · Humidity 53–85% · Wind 9 mph

Environmental watch

Air quality + smoke

Air quality

Hagerstown Region · Updated Thu 2:25 PM
19GoodUS AQI

Good through Sun 12 PM.

Sky check

No plume detected overhead

Satellite view · Updated Thu 8:45 AM

Air near ground19 · Good US AQI

Rain, in motion · Past four hours

Mercersburg radar

Ready when you areSee what is moving toward Mercersburg.

Watch the last four hours of rain, then search any nearby trail, lake, or address.

View the official forecast ↗

Outdoor fire check

Thinking about a backyard fire?

Weather is less concerning around 4 PM–7 PM.

Humidity stays higher and winds stay lighter for at least three hours.

Next 12 hoursChoose a time to see what is driving the concern.
Selected timeNowLower weather concern

Humidity is 75% with light wind and gusts below 8 mph.

Humidity
75%
Wind
3 mph
Gusts
7 mph

Check local rules. Weather is only part of the decision. Check city, county, and land-manager fire restrictions before lighting any outdoor fire.

About these readingsSources and local limits

Weather

Forecasts, alerts, and radar come from NOAA and the National Weather Service.

Air quality

This reading describes Hagerstown Region, about 15 miles away. Conditions can differ at this exact spot.

Smoke

Satellite imagery shows smoke overhead. It cannot tell us how much smoke has reached breathing level.

This page represents Mercersburg, PA, so conditions can vary from street to street. Environmental data: AirNow · participating air agencies · preliminary real-time US AQI · NOAA Hazard Mapping System · satellite-observed smoke.