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

Derry

13,387 people, 1,210 ft above sea level in Westmoreland County.

1,210 ftElevation, city center
13,387People, 2024 estimate
96 sq miLand area
Sunny 68°
Sunny now Dew point 61° · Calm · high 71°
City of Derry River Interstate 5 miles
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The Derry 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 Derry

NWS forecast and National Blend of Models · updated 2:00 PM EDT
RIGHT NOW Arnold Palmer Regional Airport (KLBE) · 2:47 PM
Sunny
68° Sunny Feels like 68° · high of 71° near 3 PM
WindCalmno gusts
Humidity78%rising to 100% by morning
Pressure30.09 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 61° · Stickyabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Friday80% chance · showers
LIKELY AMOUNT—amounts come within 3 days
LAST RAINSept. 220.27 in · 7 dry days
ALERTS & OUTLOOKS
No watches or warnings for Westmoreland County
NWS Pittsburgh and the Storm Prediction Center · checked 3:21 PM
SUN & MOON
↑ 7:11 AM7:03 PM ↓
11 h 52 m of daylight, 3 minutes less than yesterday
Waning gibbous, 89% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
29
GOODAir quality index · fine particles
Tomorrow: 48, 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
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
partly cloudy day
mostly clear night
mostly clear night
mostly clear night
mostly clear night
fog
mostly sunny
partly cloudy day
mostly cloudy day
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
partly 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
TEMPERATURE °F
71°
54°
76°
64°
78°
66°
CHANCE OF RAIN
50%
WIND, MPH
0
0
0
0
0
0
0
7
7
6
5
3
4
8
11
13
13
12
10
9
11
13
15
17
HOW IT FEELS · DEW POINT
Sticky: dew points 54 to 66°

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 Partly cloudy Partly cloudy
71° 54°
0% rain — NW 0 A
WED Sept. 30 Partly cloudy Partly cloudy
77° 63°
10% rain — WSW 4 A
THU Oct. 1 Partly cloudy Partly cloudy
80° 66°
10% rain — SW 12 B
FRI Oct. 2 Showers likely Showers likely
78° 54°
80% rain 0.2–0.7″ NNW 14 C
SAT Oct. 3 Chance of showers; cooler Chance of showers; cooler
68° 53°
40% rain up to 0.3″ E 9 B
SUN Oct. 4 Chance of showers Chance of showers
68° 48°
40% rain up to 0.4″ W 10 C
MON Oct. 5 Mostly sunny Mostly sunny
63° 41°
0% rain — NNW 12 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

MILE7
ON THE NETWORK

Around Derry on the Forecast Network

Neighboring plates

Hempfield PA · 16 MI 16 miles southwest Pittsburgh PA · 35 MI 35 miles west Cleveland OH · 145 MI 145 miles northwest Arlington VA · 157 MI 157 miles southeast Washington DC · 159 MI 159 miles southeast Baltimore MD · 162 MI 162 miles southeast
FORECASTCITY
Atlas plate of Derry, Pennsylvania. Explore the plate
PENNSYLVANIA · WESTMORELAND

Derry

13,387 people, 1,210 ft above sea level in Westmoreland County.

1,210 ftElevation
13,387People
96 sq miLand
Sunny 68°
SunnyDew point 61°
1

Today in Derry

NEXT 15 HOURS
Now partly cloudy day 71° 0%
6p partly cloudy day 70° 0%
9p mostly clear night 61° 0%
12a mostly clear night 58° 0%
3a mostly clear night 56° 0%
6a fog 54° 0%
Rain
NEXT RAINFriday · 80%
→
Tue0%
Partly cloudy Partly cloudy
54
71
A
Wed10%
Partly cloudy Partly cloudy
63
77
A
Thu10%
Partly cloudy Partly cloudy
66
80
B
Fri80%
Showers likely Showers likely
54
78
C
Sat40%
Chance of showers; cooler Chance of showers; cooler
53
68
B
Sun40%
Chance of showers Chance of showers
48
68
C
Mon0%
Mostly sunny Mostly sunny
41
63
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
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