Weather StoryAlmanac, microseasons, and the day's weather story.

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

Chambersburg, PA
Sunday, July 5 at 4:30 PM
90
°
Partly Cloudy
Feels like
97°
Humidity
51%
Wind
1 mph
Sunrise
1:48 AM
Sunset
4:42 PM
Chambersburg, PA
Hour by hour · 24h
24-Hour ForecastChambersburg, PA: 24-hour forecast. Temperatures range from 70 to 91 degrees Fahrenheit with a 34% chance of precipitation at 5 PM.
L 70°H 91°
Chambersburg, PA
7-day forecast
  1. Today
    Jul 5
    Light Rain
    34%
    0.15″
    91°69°
  2. Monday
    Jul 6
    Overcast
    33%
    84°70°-7°
  3. Tuesday
    Jul 7
    Rain
    66%
    0.66″
    72°64°-12°
  4. Wednesday
    Jul 8
    Light Drizzle
    29%
    0.03″
    69°63°-3°
  5. Thursday
    Jul 9
    Light Drizzle
    35%
    92°65°+23°
  6. Friday
    Jul 10
    Light Drizzle
    45%
    0.05″
    81°67°-11°
  7. Saturday
    Jul 11
    Foggy
    39%
    82°66°+1°
Chambersburg, PA
Anemometer · 24h winds · from true
NESW
From · True
SW
217° · steady
Direction
SW
217°
Sustained
1
mph
Gust
3
mph
Peak 24h
19
avg 4
Beaufort · 1 · LIGHT AIR
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 4 · pk 19 @ 8:00p
0102030MPHB1B2B3B4B5B6-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 2313SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Chambersburg, PA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
990.3
-1.1 mb in 3h · falling · 29.24 inHg
Now
990.3
mb
3h
-1.1
mb
12h
-0.2
mb
24h
+0.4
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 989993
9859909951000STORM|RAIN-21h-18h-15h-12h-9h-6h-3h-24hNOW992.7989.3990.4
−24h−18h−12h−6hnow
Deep low still deepening — rough seas, strong wind, persistent rain.
Chambersburg, PA
Air quality
71
AQI
Moderate
+33 in 6h

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.

PM 2.5Moderate
12.2μg/m³
PM 10Good
13μg/m³
NO₂Good
1μg/m³
OzoneDRIVERUnhealthy SG
117μg/m³
UV IndexModerate
3.1

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
Chambersburg, PA
Sky cover · visibility · 24h
Cloud cover
50%
PARTLY CLOUDY
100%0%−24h−18h−12h−6hnow

Visibility
74.6mi
UNLIMITED
108 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
20:30 UTC · Chambersburg, PA · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
20:30 UTC · Chambersburg, PA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Chambersburg, PA
Satellite · infrared · animated
Chambersburg, PA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Chambersburg, PA
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:16 AM
Sunrise
1:48 AM
Daylight
14h 54m
Sunset
4:42 PM
Civil dusk
9:16 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Chambersburg, PA
The moon
Waning Gibbous
69% illuminated
Moonrise
11:28 PM
Moonset
11:20 AM
In sign
♓︎ Pisces
Chambersburg, PA
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

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

  1. Sun91°69°34%
  2. Mon84°70°33%
  3. Tue72°64°66%
  4. Wed69°63°29%
  5. Thu92°65°35%
  6. Fri81°67°45%
  7. Sat82°66°39%
  8. Sun78°66°23%
  9. Mon87°63°18%
  10. Tue66°62°15%
  11. Wed72°63°15%
  12. Thu82°58°29%
  13. Fri82°62°23%
  14. Sat82°63°19%
  15. Sun82°64°23%
  16. 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

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.