Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Severe storms to threaten central U.S. with hail and strong wind gusts Chevron right
Ready for autumn? Read AccuWeather's 2025 US fall forecast to see what's in store. Chevron right

Mercersburg Junction, PA

68°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Mercersburg Junction

Pennsylvania

68°
No results found.
Try searching for a city, zip code or point of interest.
settings
Mercersburg Junction, PA Weather
Today WinterCast Local {stormName} Tracker Hourly Daily Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps
News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel
For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center
Today Hourly

Daily

 Radar MinuteCast® Monthly Air Quality Health & Activities
Air Quality Alert

August 6 - September 19

Wed 8/6

80° /64°
49%
Mostly cloudy
alerts

Air Quality Alert

5:06 PM Monday - 12:00 AM Thursday

RealFeel®65°

Cloud Cover75%

WindENE 4 mph

Wind Gusts9 mph

Thu 8/7

81° /61°
8%
Periods of clouds and sunshine; smoke from wildfires in Canada can create reduced air quality

RealFeel®88°

RealFeel Shade™79°

Max UV Index9 (Very High)

WindE 5 mph

Fri 8/8

84° /60°
3%
Partly sunny

RealFeel®89°

RealFeel Shade™81°

Max UV Index9 (Very High)

WindE 6 mph

Sat 8/9

85° /59°
0%
Plenty of sun

RealFeel®93°

RealFeel Shade™83°

Max UV Index9 (Very High)

WindE 2 mph

Sun 8/10

87° /65°
0%
Mostly sunny

RealFeel®94°

RealFeel Shade™85°

Max UV Index9 (Very High)

WindSSE 4 mph

Mon 8/11

90° /65°
0%
Mostly sunny and hot

RealFeel®98°

RealFeel Shade™89°

Max UV Index8 (Very High)

WindSSE 5 mph

Tue 8/12

92° /68°
4%
Hot and humid with times of clouds and sun

RealFeel®106°

RealFeel Shade™96°

Max UV Index9 (Very High)

WindSSW 4 mph

Wed 8/13

90° /67°
59%
Mostly cloudy and hot; occasional morning rain and a thunderstorm followed by a thunderstorm in spots in the afternoon

RealFeel®93°

RealFeel Shade™89°

Max UV Index4 (Moderate)

WindW 6 mph

Thu 8/14

91° /66°
1%
Mostly sunny and hot

RealFeel®91°

RealFeel Shade™88°

Max UV Index9 (Very High)

WindWNW 8 mph

Fri 8/15

90° /69°
1%
Hot with partial sunshine; a couple of thunderstorms in the afternoon

RealFeel®92°

RealFeel Shade™87°

Max UV Index9 (Very High)

WindNW 8 mph

Sat 8/16

87° /67°
65%
Periods of rain and a thunderstorm

RealFeel®87°

RealFeel Shade™87°

Max UV Index2 (Low)

WindSE 4 mph

Sun 8/17

86° /68°
60%
Rain at times

RealFeel®87°

RealFeel Shade™86°

Max UV Index2 (Low)

WindSSE 2 mph

Mon 8/18

87° /68°
56%
Still cloudy; a little morning rain followed by a shower in spots in the afternoon

RealFeel®89°

RealFeel Shade™89°

Max UV Index4 (Moderate)

WindS 2 mph

Tue 8/19

86° /62°
25%
Rather cloudy and humid

RealFeel®89°

RealFeel Shade™87°

Max UV Index3 (Moderate)

WindSE 2 mph

Wed 8/20

84° /66°
62%
Cloudy and humid with a couple of showers and a thunderstorm

RealFeel®89°

RealFeel Shade™89°

Max UV Index2 (Low)

WindS 4 mph

Thu 8/21

79° /65°
65%
Humid with times of clouds and sun; a couple of showers and a thunderstorm in the afternoon

RealFeel®86°

RealFeel Shade™82°

Max UV Index5 (Moderate)

WindNNW 4 mph

Fri 8/22

79° /65°
65%
A couple of showers and a thunderstorm in the morning; otherwise, cloudy and humid

RealFeel®81°

RealFeel Shade™81°

Max UV Index2 (Low)

WindN 6 mph

Sat 8/23

80° /61°
25%
Mostly cloudy

RealFeel®85°

RealFeel Shade™80°

Max UV Index8 (Very High)

WindN 4 mph

Sun 8/24

79° /63°
25%
Turning cloudy and humid

RealFeel®82°

RealFeel Shade™81°

Max UV Index5 (Moderate)

WindE 2 mph

Mon 8/25

81° /65°
64%
Humid with plenty of clouds; a couple of afternoon showers and a thunderstorm

RealFeel®87°

RealFeel Shade™87°

Max UV Index2 (Low)

WindS 4 mph

Tue 8/26

81° /64°
25%
Cloudy and humid

RealFeel®88°

RealFeel Shade™87°

Max UV Index2 (Low)

WindW 1 mph

Wed 8/27

83° /65°
25%
Humid with intervals of clouds and sunshine

RealFeel®89°

RealFeel Shade™87°

Max UV Index2 (Low)

WindWSW 2 mph

Thu 8/28

84° /64°
56%
A couple of morning showers; otherwise, mainly cloudy and humid

RealFeel®89°

RealFeel Shade™89°

Max UV Index2 (Low)

WindNW 2 mph

Fri 8/29

81° /64°
25%
Considerable cloudiness

RealFeel®80°

RealFeel Shade™80°

Max UV Index3 (Moderate)

WindNE 6 mph

Sat 8/30

78° /63°
25%
Cloudy and humid

RealFeel®78°

RealFeel Shade™78°

Max UV Index2 (Low)

WindESE 6 mph

Sun 8/31

76° /64°
66%
Cloudy and humid; rain in the morning followed by showers and thunderstorms in the afternoon

RealFeel®79°

RealFeel Shade™79°

Max UV Index2 (Low)

WindESE 7 mph

Mon 9/1

76° /64°
60%
Humid with periods of rain

RealFeel®78°

RealFeel Shade™78°

Max UV Index2 (Low)

WindNNE 9 mph

Tue 9/2

78° /63°
56%
Mostly sunny and humid; a passing afternoon shower

RealFeel®82°

RealFeel Shade™78°

Max UV Index7 (High)

WindNNW 9 mph

Wed 9/3

80° /59°
20%
Mostly sunny and less humid

RealFeel®85°

RealFeel Shade™80°

Max UV Index7 (High)

WindNW 4 mph

Thu 9/4

77° /63°
65%
Mostly cloudy and humid; a couple of showers and a thunderstorm in the afternoon

RealFeel®81°

RealFeel Shade™81°

Max UV Index2 (Low)

WindS 6 mph

Fri 9/5

79° /63°
40%
Cloudy and humid with a thundershower in spots

RealFeel®84°

RealFeel Shade™84°

Max UV Index2 (Low)

WindSE 2 mph

Sat 9/6

75° /62°
62%
Cloudy and humid with a couple of showers and a thunderstorm

RealFeel®78°

RealFeel Shade™78°

Max UV Index2 (Low)

WindNE 4 mph

Sun 9/7

75° /62°
59%
A couple of showers in the morning; otherwise, remaining cloudy and humid

RealFeel®78°

RealFeel Shade™78°

Max UV Index2 (Low)

WindNNW 5 mph

Mon 9/8

76° /61°
56%
A passing morning shower; otherwise, humid with partial sunshine

RealFeel®80°

RealFeel Shade™75°

Max UV Index4 (Moderate)

WindNW 5 mph

Tue 9/9

77° /61°
25%
Rather cloudy

RealFeel®79°

RealFeel Shade™79°

Max UV Index2 (Low)

WindWNW 2 mph

Wed 9/10

79° /60°
25%
Humid with times of clouds and sun

RealFeel®82°

RealFeel Shade™79°

Max UV Index2 (Low)

WindSSW 2 mph

Thu 9/11

80° /61°
10%
Mostly sunny

RealFeel®83°

RealFeel Shade™79°

Max UV Index6 (High)

WindNW 6 mph

Fri 9/12

82° /54°
3%
Partly sunny

RealFeel®82°

RealFeel Shade™79°

Max UV Index6 (High)

WindNNW 9 mph

Sat 9/13

82° /60°
0%
Sunshine and a few clouds

RealFeel®82°

RealFeel Shade™79°

Max UV Index6 (High)

WindNW 7 mph

Sun 9/14

81° /60°
3%
Mostly sunny

RealFeel®84°

RealFeel Shade™80°

Max UV Index6 (High)

WindW 4 mph

Mon 9/15

76° /48°
70%
Mostly cloudy with showers and thunderstorms, mainly early in the day

RealFeel®75°

RealFeel Shade™72°

Max UV Index2 (Low)

WindWSW 10 mph

Tue 9/16

69° /49°
25%
Less humid with periods of clouds and sunshine

RealFeel®69°

RealFeel Shade™66°

Max UV Index2 (Low)

WindNW 8 mph

Wed 9/17

70° /50°
0%
Mostly sunny

RealFeel®74°

RealFeel Shade™68°

Max UV Index5 (Moderate)

WindSE 4 mph

Thu 9/18

71° /55°
4%
Intervals of clouds and sunshine

RealFeel®71°

RealFeel Shade™70°

Max UV Index4 (Moderate)

WindSSE 5 mph

Fri 9/19

72° /52°
16%
Intervals of clouds and sunshine

RealFeel®70°

RealFeel Shade™70°

Max UV Index4 (Moderate)

WindSE 9 mph

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Fall forecast 2025: Warmth to fuel fires, storms before chill hits US

14 hours ago

Hurricane

Atlantic to teem with tropical activity, concerns for Caribbean, US

6 hours ago

Recreation

Thermal camera reveals how dangerously hot playgrounds get

2 days ago

Weather Forecasts

Southeast faces dangerous flash flooding as heavy rain returns

5 hours ago

Weather Forecasts

Heat brewing for parts of Northeast as rain remains scarce

4 hours ago

 More Stories

Featured Stories

Weather News

Read the Coast Guard report on the implosion of the Titan submersible

16 hours ago

Astronomy

NASA astronaut shares surreal photo of Earth, 3 galaxies

2 days ago

Weather News

Third girl dies after sailboat and barge collision in Miami

2 days ago

Weather News

Italian farmers set up turnstiles to charge access to hot spots

1 day ago

Weather News

Small earthquake hits near New York City

2 days ago
World North America United States Pennsylvania Mercersburg Junction

Weather Near Mercersburg Junction:

  • Harrisburg, PA
  • Lancaster, PA
  • York, PA
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect RealFeel® and RealFeel Shade™ Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect RealFeel® and RealFeel Shade™ Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2025 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information

...

...

...