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Shaded-relief atlas plate of Allegheny, Pennsylvania: rivers, roads, the city limits and where the water drains.
PENNSYLVANIA · SOMERSET COUNTY

Allegheny

607 people, 1,860 ft above sea level in Somerset County.

1,860 ftElevation, city center
607People, 2024 estimate
51 sq miLand area
Sunny 61°
Sunny now Dew point 55° · Calm · high 62°
City of Allegheny River Interstate 2 miles
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The Allegheny plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Allegheny

NWS forecast and National Blend of Models · updated 6:00 PM EDT
RIGHT NOW Somerset County Airport (K2G9) · 6:55 PM
Sunny
61° Sunny Feels like 61° · high of 62° near 7 PM
WindCalmno gusts
Humidity82%rising to 100% by morning
Pressure30.11 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 55° · Comfortableabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Friday, about 3 PMin about 68 hours · 74% chance · rain
LIKELY AMOUNT0.07–0.4 inmost likely 0.3; 1 in 10 over 0.7
LAST RAINSept. 280.1 in · 1 dry day
ALERTS & OUTLOOKS
No watches or warnings for Somerset County
NWS State College and the Storm Prediction Center · checked 7:17 PM
SUN & MOON
↑ 7:09 AM7:01 PM ↓
11 h 52 m of daylight, 3 minutes less than yesterday
Waning gibbous, 88% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
27
GOODAir quality index · fine particles
Tomorrow: 44, good. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
TUESDAY, SEPT. 29
WEDNESDAY, SEPT. 30
THURSDAY, OCT. 1
FRIDAY, OCT. 2
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
mostly clear night
mostly clear night
mostly clear night
fog
fog
mostly sunny
partly cloudy day
partly cloudy day
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
partly cloudy day
mostly cloudy day
rain
TEMPERATURE °F
62°
51°
73°
59°
75°
64°
CHANCE OF RAIN
74% · 0.04 in Friday afternoon 50%
WIND, MPH
0
0
0
1
1
3
6
5
2
3
3
3
5
8
10
8
6
6
6
8
9
13
14
10
HOW IT FEELS · DEW POINT
Dry: dew points 51 to 57° ↑ Humid air returns More humid: 62° by Friday

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 80° / 62°
TUE Sept. 29 Mostly sunny Mostly sunny
62° 51°
0% rain — WNW 0 A
WED Sept. 30 Partly cloudy; warmer Partly cloudy; warmer
73° 59°
0% rain — SW 4 A
THU Oct. 1 Partly cloudy Partly cloudy
76° 63°
0% rain — WSW 8 A
FRI Oct. 2 Showers likely Showers likely
74° 49°
70% rain 0.07–0.4″ NW 8 C
SAT Oct. 3 Partly cloudy; cooler Partly cloudy; cooler
63° 48°
30% rain — ESE 3 B
SUN Oct. 4 Chance of showers Chance of showers
63° 45°
40% rain up to 0.4″ WSW 3 C
MON Oct. 5 Mostly sunny Mostly sunny
59° 37°
0% rain — NW 7 C
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over Allegheny about 5,000 feet above the ground was over the Atlantic off the Carolinas three days ago, and over the Great Lakes a day ago, about 1,630 miles back along its path. Near the ground the air came from Quebec; at 10,000 feet, from New England. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

MILE7
ON THE NETWORK

Around Allegheny on the Forecast Network

Neighboring plates

Cumberland MD · 20 MI 20 miles south Johnstown PA · 27 MI 27 miles north Washington DC · 120 MI 120 miles southeast Baltimore MD · 125 MI 125 miles east Cleveland OH · 184 MI 184 miles northwest Philadelphia PA · 195 MI 195 miles east
FORECASTCITY
Atlas plate of Allegheny, Pennsylvania. Explore the plate
PENNSYLVANIA · SOMERSET

Allegheny

607 people, 1,860 ft above sea level in Somerset County.

1,860 ftElevation
607People
51 sq miLand
Sunny 61°
SunnyDew point 55°
1

Today in Allegheny

NEXT 15 HOURS
Now partly cloudy night 62° 0%
10p mostly clear night 56° 0%
1a mostly clear night 53° 0%
4a fog 52° 0%
7a fog 51° 0%
10a partly cloudy day 63° 0%
Rain
NEXT RAINFriday about 3 PM · 74%
→
Tue0%
Mostly sunny Mostly sunny
51
62
A
Wed0%
Partly cloudy; warmer Partly cloudy; warmer
59
73
A
Thu0%
Partly cloudy Partly cloudy
63
76
A
Fri70%
Showers likely Showers likely
49
74
C
Sat30%
Partly cloudy; cooler Partly cloudy; cooler
48
63
B
Sun40%
Chance of showers Chance of showers
45
63
C
Mon0%
Mostly sunny Mostly sunny
37
59
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
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