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

Derry

7,226 people, 600 ft above sea level in Mifflin County.

600 ftElevation, city center
7,226People, 2024 estimate
31 sq miLand area
Sunny 70°
Sunny now Dew point 59° · Calm · high 71°
City of Derry River Interstate 2 miles
Explore the plate Order a print

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 4:00 PM EDT
RIGHT NOW Reedsville / Mifflin (KRVL) · 4:35 PM
Sunny
70° Sunny Feels like 70° · high of 71° near 4 PM
WindCalmno gusts
Humidity69%rising to 100% by morning
Pressure30.03 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 59° · Comfortable68° by Friday: more humid
DryComfortableStickyMuggyOppressive
NEXT RAIN
Mostly cloudy
Friday, about 3 PMin about 70 hours · 50% chance · rain
LIKELY AMOUNT0–0.3 inmost likely 0.01; 1 in 10 over 0.5
LAST RAINSept. 280.2 in · 1 dry day
ALERTS & OUTLOOKS
No watches or warnings for Mifflin County
NWS State College and the Storm Prediction Center · checked 4:55 PM
SUN & MOON
↑ 7:04 AM6:56 PM ↓
11 h 52 m of daylight, 3 minutes less than yesterday
Waning gibbous, 88% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
26
GOODAir quality index · ozone
Tomorrow: 37, 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
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
partly cloudy day
partly cloudy night
partly cloudy night
mostly clear night
mostly clear night
partly cloudy day
partly cloudy day
partly cloudy day
mostly cloudy day
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
partly cloudy day
mostly sunny
mostly sunny
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
partly cloudy day
mostly cloudy day
TEMPERATURE °F
71°
56°
78°
61°
79°
64°
CHANCE OF RAIN
50% · 0.00 in Friday afternoon 50%
WIND, MPH
1
0
0
0
0
0
0
3
1
0
0
0
0
0
0
3
2
1
1
1
0
1
3
8
HOW IT FEELS · DEW POINT
Sticky: dew points 56 to 66° ↑ Humid air returns More humid: 67° by Friday

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 72° / 49°
TUE Sept. 29 Partly cloudy Partly cloudy
71° 56°
0% rain — WNW 1 A
WED Sept. 30 Partly cloudy; warmer Partly cloudy; warmer
79° 61°
0% rain — SW 1 A
THU Oct. 1 Partly cloudy Partly cloudy
81° 63°
0% rain — SW 1 B
FRI Oct. 2 Chance of showers Chance of showers
82° 52°
50% rain up to 0.3″ NW 5 C
SAT Oct. 3 Partly cloudy; cooler Partly cloudy; cooler
70° 48°
30% rain — ENE 5 B
SUN Oct. 4 Chance of showers Chance of showers
67° 48°
40% rain up to 0.4″ SW 5 C
MON Oct. 5 Mostly sunny Mostly sunny
66° 40°
0% rain — NW 3 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 Derry 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 1,440 miles back along its path. 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 Derry on the Forecast Network

Neighboring plates

State College PA · 20 MI 20 miles northwest Hampden PA · 39 MI 39 miles southeast Baltimore MD · 104 MI 104 miles southeast Washington DC · 123 MI 123 miles south Philadelphia PA · 134 MI 134 miles east New York NY · 189 MI 189 miles east
FORECASTCITY
Atlas plate of Derry, Pennsylvania. Explore the plate
PENNSYLVANIA · MIFFLIN

Derry

7,226 people, 600 ft above sea level in Mifflin County.

600 ftElevation
7,226People
31 sq miLand
Sunny 70°
SunnyDew point 59°
1

Today in Derry

NEXT 15 HOURS
Now partly cloudy day 71° 0%
7p partly cloudy night 66° 1%
10p partly cloudy night 61° 0%
1a partly cloudy night 59° 0%
4a partly cloudy night 57° 0%
7a fog 56° 0%
Mostly cloudy
NEXT RAINFriday about 3 PM · 50%
→
Tue0%
Partly cloudy Partly cloudy
56
71
A
Wed0%
Partly cloudy; warmer Partly cloudy; warmer
61
79
A
Thu0%
Partly cloudy Partly cloudy
63
81
B
Fri50%
Chance of showers Chance of showers
52
82
C
Sat30%
Partly cloudy; cooler Partly cloudy; cooler
48
70
B
Sun40%
Chance of showers Chance of showers
48
67
C
Mon0%
Mostly sunny Mostly sunny
40
66
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
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