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Shaded-relief map of Freeport, Pennsylvania: rivers, roads, the city limits and where the water drains.
PENNSYLVANIA · ARMSTRONG COUNTY

Freeport

1,677 people, 800 ft above sea level in Armstrong County.

800 ftElevation, city center
1,677People, 2024 estimate
1 sq miLand area
Clear 37°
Clear now Dew point 36° · W 14 mph · high 37°
City of Freeport River Interstate 2 miles
Explore the plate Order a print

The Freeport 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 Freeport

NWS forecast and National Blend of Models · updated 6:00 PM EST
RIGHT NOW Pittsburgh/Butler Regional Airport (KBTP) · 7:12 PM
Clear
37° Clear Feels like 29° · high of 37° near 7 PM
WindW 14 mphno gusts
Humidity93%rising to 100% by morning
Pressure30.08 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 36° · Dryabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Tonight, around midnightin about 5 hours · 36% chance · rain
LIKELY AMOUNT—amounts come within 3 days
LAST RAINNov. 120.18 in · 2 dry days
ALERTS & OUTLOOKS
No watches or warnings for Armstrong County
NWS Pittsburgh and the Storm Prediction Center · checked 7:21 PM
SUN & MOON
↑ 7:04 AM5:02 PM ↓
9 h 57 m of daylight, 2 minutes less than yesterday
Waxing crescent, 27% lit. Next full moon: Nov. 24.
AIR & POLLEN
28
GOODAir quality index · ozone
Tomorrow: 25, good. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
SATURDAY, NOV. 14
SUNDAY, NOV. 15
MONDAY, NOV. 16
TUESDAY, NOV. 17
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 cloudy night
mostly cloudy night
rain
rain
mostly cloudy day
mostly cloudy day
mostly cloudy day
mostly cloudy night
partly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
mostly cloudy day
mostly cloudy day
partly cloudy night
mostly clear night
mostly clear night
mostly clear night
mostly clear night
mostly sunny
mostly sunny
mostly sunny
clear night
TEMPERATURE °F
37°
36°
44°
35°
45°
28°
CHANCE OF RAIN
36% · 0.06 in Sunday overnight 50%
WIND, MPH
12
10
8
7
7
10
10
7
3
0
0
0
2
5
6
4
0
0
0
0
1
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2
HOW IT FEELS · DEW POINT
Dry: dew points 28 to 39°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 80° / 62°
SAT Nov. 14 Mostly cloudy Mostly cloudy
37° 32°
20% rain — W 11 A
SUN Nov. 15 Chance of showers; warmer Chance of showers; warmer
46° 32°
40% rain — NW 9 A
MON Nov. 16 Mostly cloudy Mostly cloudy
48° 25°
0% rain — NW 4 A
TUE Nov. 17 Partly cloudy Partly cloudy
52° 26°
0% rain — SW 5 A
WED Nov. 18 Sunny Sunny
55° 27°
0% rain — S 5 B
THU Nov. 19 Mostly sunny Mostly sunny
58° 36°
0% rain — SSW 5 B
FRI Nov. 20 Mostly sunny Mostly sunny
59° 37°
0% rain — WSW 5 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 Freeport about 5,000 feet above the ground was over British Columbia three days ago, and over the Great Lakes a day ago, about 2,220 miles back along its path. Near the ground the air came from British Columbia; at 10,000 feet, from the open Pacific. It feels dry all the same. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

THIS WEEK, SIX YEARS AGO Nov. 11, 2020

The hottest this week has been

78° on Nov. 11, 2020, the hottest reading for this week of the year since 1927. Next is 70° in 2005.

70°
78°
20052020
Source: NOAA RCC-ACIS, the Natrona Lock 4 record since 1927.
MILE2
THE GROUND

What Freeport stands on

Freeport’s center stands about 800 ft above sea level. Within three miles the land runs from 740 ft to 1,290 ft, a difference of 550 ft: hilly country. The highest named summit within 15 miles is Rich Hill, about 1,290 ft, 10 miles southwest.

Under the town center the state geologic map shows Allegheny Formation (sandstone), from the Carboniferous, 299 to 324 million years old.

The section below crosses 3 rock units mapped at the surface.

Middlesex to Spring Church, cut in half

A section northwest to southeast, 24 miles through the town center
750 ft1,000 ft1,250 ft FREEPORT800 ftClinton1,310 ftKiskiminetas Riverabout 750 ftHyde Park1,120 ftParks1,000 ftHigh point of the line1,460 ft ← NW · MiddlesexSpring Church · SE →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 27×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.

Rock at the surface along the line

Glenshaw Formation

Shale. Age: Carboniferous, 299 to 324 million years old. About 21 mi of the line.

Casselman Formation

Shale, clastic. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.

Allegheny Formation

Sandstone. Age: Carboniferous, 299 to 324 million years old. About 1 mi of the line.

From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.

Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.

MILE3
THE WATER

Where Freeport’s rain goes

A raindrop that lands in Freeport reaches the Gulf of America by way of Buffalo Creek, the Allegheny, the Ohio and the Mississippi: about 1,980 river miles.

THE WAY DOWN, TO SCALE
Freeport≈ 1,980 mi · the Gulf of America
FROM THE CENTER OF FREEPORT ≈ 1,980 mi to the Gulf of America Buffalo Creek → Allegheny → Ohio → Mississippi

970 miles of the trip are on the Ohio.

Traced down the USGS NHDPlus V2.1 river network from the Census center point of Freeport; river miles along the main stem, rounded.

MILE5
THE ALMANAC

Freeport’s year

1991–2020 normals · records since 1927 · Natrona Lock 4, 5 mi south-southwest

Freeport has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 21° in January. About 42 inches of rain fall in a normal year.

36°21°40°21°50°27°62°38°72°50°80°59°84°63°82°62°76°55°64°43°52°33°41°26° JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 1 TODAY FREEPORT 42.2 in rain a year
Normal high to low, by month Rain by month Freezing
July, average84° / 63°high / low, the warmest month
January, average36° / 21°high / low, the coldest month
Rain a year42.2 inwettest months: June and July
Hottest on record104°FJuly 6, 1977
Coldest on record−12°FFebruary 1, 2026
Wettest day on record5.70 inSeptember 18, 2004
Climate typeHot-summer humid continentalKöppen Dfa

AROUND THE RING

1Lows below freezingNov. 15 to April 1; normal lows fall below 32°
MONTH BY MONTH
JanFebMarAprMayJunJulAugSepOctNovDec
Normal high36°40°50°62°72°80°84°82°76°64°52°41°
Normal low21°21°27°38°50°59°63°62°55°43°33°26°
Rain, inches3.122.793.273.583.904.344.263.553.993.093.093.26

Normals 1991–2020 and records since 1927 at Natrona Lock 4, 5 miles south-southwest. NOAA, through RCC-ACIS.

MILE7
ON THE NETWORK

Around Freeport on the Forecast Network

Neighboring plates

Pittsburgh PA · 23 MI 23 miles southwest Bethel Park PA · 31 MI 31 miles southwest Cleveland OH · 118 MI 118 miles northwest Arlington VA · 186 MI 186 miles southeast Washington DC · 188 MI 188 miles southeast Baltimore MD · 189 MI 189 miles southeast
FORECASTCITY
Map of Freeport, Pennsylvania. Explore the plate
PENNSYLVANIA · ARMSTRONG

Freeport

1,677 people, 800 ft above sea level in Armstrong County.

800 ftElevation
1,677People
1 sq miLand
Clear 37°
ClearDew point 36°
1

Today in Freeport

NEXT 15 HOURS
Now mostly cloudy night 37° 7%
10p mostly cloudy night 36° 25%
1a rain 36° 31%
4a rain 36° 34%
7a mostly cloudy day 36° 8%
10a mostly cloudy day 42° 2%
Rain
NEXT RAINTonight around midnight · 36%
→
Sat20%
Mostly cloudy Mostly cloudy
32
37
A
Sun40%
Chance of showers; warmer Chance of showers; warmer
32
46
A
Mon0%
Mostly cloudy Mostly cloudy
25
48
A
Tue0%
Partly cloudy Partly cloudy
26
52
A
Wed0%
Sunny Sunny
27
55
B
Thu0%
Mostly sunny Mostly sunny
36
58
B
Fri0%
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.
THIS WEEK, SIX YEARS AGO · NOV. 11, 2020

78°, the hottest this week of the year has been since 1927.

2

What Freeport stands on

Freeport’s center stands about 800 ft above sea level. Within three miles the land runs from 740 ft to 1,290 ft, a difference of 550 ft: hilly country. The highest named summit within 15 miles is Rich Hill, about 1,290 ft, 10 miles southwest.

Freeport, northwest to southeast Freeport800 ftKiskiminetas Riverabout 750 ft ← NWSE → 24 miles through the town center; vertical exaggeration about 52×. Colors: rock at the surface.
Elevation, center800 ft
Within 3 miles740 to 1,290 ft
Lie of the landHilly (550 ft of relief)
High point nearbyRich Hill, 1,290 ft, 10 mi southwest
Rock at the surfaceAllegheny Formation
Its ageCarboniferous, 299 to 324 million years old
5

Freeport’s year

Freeport has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 21° in January. About 42 inches of rain fall in a normal year.

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 1 42.2 in
July, average84° / 63° · high / low, the warmest month
January, average36° / 21° · high / low, the coldest month
Rain a year42.2 in · wettest months: June and July
Hottest on record104°F · July 6, 1977
Coldest on record−12°F · February 1, 2026
Wettest day on record5.70 in · September 18, 2004
Climate typeHot-summer humid continental · Köppen Dfa
1Lows below freezing · Nov. 15 to April 1; normal lows fall below 32°
Normals 1991–2020 and records since 1927 at Natrona Lock 4, 5 miles south-southwest. NOAA, through RCC-ACIS.
3

Where the rain goes

≈ 1,980 mito the Gulf of AmericaBuffalo Creek → Allegheny → Ohio → Mississippi

A raindrop that lands in Freeport reaches the Gulf of America by way of Buffalo Creek, the Allegheny, the Ohio and the Mississippi: about 1,980 river miles.

970 miles of the trip are on the Ohio.