Chambersburg, Pennsylvania Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Chambersburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Light Rain34%0.15″91°69°—
- MondayJul 6Overcast33%—84°70°-7°
- TuesdayJul 7Rain66%0.66″72°64°-12°
- WednesdayJul 8Light Drizzle29%0.03″69°63°-3°
- ThursdayJul 9Light Drizzle35%—92°65°+23°
- FridayJul 10Light Drizzle45%0.05″81°67°-11°
- SaturdayJul 11Foggy39%—82°66°+1°
AQI 71 (Moderate), driven by Ozone. AQI up 33 in the last 6 hours — air quality is degrading. Ozone at AQI 66 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 66 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 66
- UV peak
- 2.8 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 66
PM × Wind × Precip
PM2.5 at 12.2 µg/m³ (AQI 57) with a 0.93 fine-to-coarse ratio and 1 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:28 PM
- Moonset
- 11:20 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Chambersburg at a glance
- Today vs. normal: 18°F above the seasonal normal for this latitude
- Last frost: April 16 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 17201, 17202
16-Day Forecast — Chambersburg
- Sun91°69°34%
- Mon84°70°33%
- Tue72°64°66%
- Wed69°63°29%
- Thu92°65°35%
- Fri81°67°45%
- Sat82°66°39%
- Sun78°66°23%
- Mon87°63°18%
- Tue66°62°15%
- Wed72°63°15%
- Thu82°58°29%
- Fri82°62°23%
- Sat82°63°19%
- Sun82°64°23%
- Mon71°66°25%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Chambersburg
SPC has placed Chambersburg in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Chambersburg
- 17201