Outdoor conditions in

Derry

Pennsylvania
Now
  1. 64°Mostly Sunny5% rain79% humidityGusts 13 mph
  2. 66°Partly Sunny7% rain76% humidityGusts 14 mph
  3. 66°Partly Sunny6% rain76% humidityGusts 14 mph
  4. 68°Partly Sunny4% rain74% humidityGusts 14 mph
  5. 67°Partly Sunny6% rain76% humidityGusts 14 mph
  6. 66°Mostly Cloudy7% rain76% humidityGusts 14 mph
  7. 65°Mostly Cloudy6% rain76% humidityGusts 16 mph
  8. 63°Mostly Cloudy6% rain83% humidityGusts 17 mph
  9. 61°Mostly Cloudy9% rain86% humidityGusts 18 mph
  10. 61°Mostly Cloudy9% rain88% humidityGusts 18 mph
  11. 61°Mostly Cloudy11% rain90% humidityGusts 18 mph
  12. 61°Scattered Showers And Thunderstorms30% rain92% humidityGusts 18 mph
  13. 62°Scattered Showers And Thunderstorms35% rain94% humidityGusts 20 mph
  14. 62°Scattered Showers And Thunderstorms36% rain100% humidityGusts 21 mph
  15. 64°Chance Showers And Thunderstorms65% rain100% humidityGusts 22 mph
  16. 65°Chance Showers And Thunderstorms59% rain100% humidityGusts 26 mph
  17. 66°Scattered Showers And Thunderstorms34% rain100% humidityGusts 30 mph
  18. 69°Mostly Cloudy13% rain95% humidityGusts 31 mph
  19. 69°Slight Chance Rain Showers23% rain95% humidityGusts 32 mph
  20. 69°Mostly Sunny10% rain93% humidityGusts 32 mph
  21. 69°Mostly Sunny7% rain91% humidityGusts 31 mph
  22. 69°Mostly Sunny6% rain91% humidityGusts 33 mph
  23. 72°Mostly Sunny2% rain84% humidityGusts 33 mph
  24. 74°Slight Chance Showers And Thunderstorms16% rain76% humidityGusts 33 mph
Extra care for

A little farther out

The next five days

Today

Today looks fairly quiet.

Rain
30%
Humidity
74–97%
Wind
18 mph
Fri

Friday looks wet for a meaningful stretch.

Rain
96%
Humidity
76–100%
Wind
35 mph
Sat

Saturday looks wet for a meaningful stretch.

Rain
81%
Humidity
48–100%
Wind
28 mph
Sun

Sunday looks fairly quiet.

Rain
8%
Humidity
41–82%
Wind
9 mph
Mon

Monday looks fairly quiet.

Rain
9%
Humidity
49–86%
Wind
9 mph
  1. 68° / 56°Today looks fairly quiet.30% rain · Humidity 74–97% · Wind 18 mph
  2. 74° / 51°Friday looks wet for a meaningful stretch.96% rain · Humidity 76–100% · Wind 35 mph
  3. 50° / 38°Saturday looks wet for a meaningful stretch.81% rain · Humidity 48–100% · Wind 28 mph
  4. 59° / 33°Sunday looks fairly quiet.8% rain · Humidity 41–82% · Wind 9 mph
  5. 62° / 37°Monday looks fairly quiet.9% rain · Humidity 49–86% · Wind 9 mph

Environmental watch

Air quality + smoke

Air quality

Johnstown area · Updated Thu 12:26 PM
27GoodUS AQI

Good through Fri 12 PM.

Sky check

No plume detected overhead

Satellite view · Updated Thu 8:45 AM

Air near ground27 · Good US AQI

Rain, in motion · Past four hours

Derry radar

Ready when you areSee what is moving toward Derry.

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?

Use extra caution.

There is no lower-concern three-hour stretch in the next 12 hours.

Next 12 hoursChoose a time to see what is driving the concern.
Selected timeNowUse caution

Thunder is possible.

Humidity
79%
Wind
7 mph
Gusts
13 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 Johnstown area, about 20 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 Derry, 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.