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

Upper Gwynedd

17,407 people, 330 ft above sea level in Montgomery County.

330 ftElevation, city center
17,407People, 2024 estimate
8 sq miLand area
Sunny 70°
Sunny now Dew point 59° · WNW 6 mph · high 71°
City of Upper Gwynedd River Interstate 2 miles
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The Upper Gwynedd 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 Upper Gwynedd

NWS forecast and National Blend of Models · updated 4:00 PM EDT
RIGHT NOW Philadelphia - Wings Field Airport (KLOM) · 4:35 PM
Sunny
70° Sunny Feels like 70° · high of 71° near 4 PM
WindWNW 6 mphno gusts
Humidity69%rising to 100% by morning
Pressure30.04 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 59° · Comfortable67° by Thursday: more humid
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Friday40% chance · showers
LIKELY AMOUNT—amounts come within 3 days
LAST RAINSept. 280.91 in · 1 dry day
ALERTS & OUTLOOKS
No watches or warnings for Montgomery County
NWS Mount Holly and the Storm Prediction Center · checked 4:56 PM
SUN & MOON
↑ 6:55 AM6:47 PM ↓
11 h 52 m of daylight, 3 minutes less than yesterday
Waning gibbous, 88% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
31
GOODAir quality index · fine particles
Tomorrow: 53, moderate. 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
partly cloudy night
mostly sunny
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
mostly cloudy day
partly cloudy day
mostly sunny
partly cloudy night
mostly clear night
mostly clear night
partly cloudy night
partly cloudy day
mostly sunny
partly cloudy day
TEMPERATURE °F
71°
58°
76°
63°
77°
65°
CHANCE OF RAIN
50%
WIND, MPH
5
0
0
0
0
0
0
5
3
0
2
1
2
2
5
6
5
3
3
5
3
3
6
8
HOW IT FEELS · DEW POINT
Sticky: dew points 58 to 67°

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° 58°
0% rain — WNW 4 A
WED Sept. 30 Partly cloudy Partly cloudy
77° 62°
0% rain — W 2 B
THU Oct. 1 Partly cloudy Partly cloudy
79° 64°
0% rain — SW 4 B
FRI Oct. 2 Chance of showers Chance of showers
83° 59°
40% rain up to 0.09″ W 6 B
SAT Oct. 3 Chance of showers; cooler Chance of showers; cooler
70° 54°
40% rain up to 0.1″ E 1 C
SUN Oct. 4 Chance of showers Chance of showers
66° 53°
40% rain up to 1.1″ ESE 3 C
MON Oct. 5 Mostly sunny Mostly sunny
65° 45°
10% rain — NNW 6 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 Upper Gwynedd about 5,000 feet above the ground was over the western Atlantic three days ago, and over the Great Lakes a day ago, about 1,320 miles back along its path. Most of the nine paths traced from around the city agree. Near the ground the air came from Canada; at 10,000 feet, from the Atlantic off the Carolinas. 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 Upper Gwynedd on the Forecast Network

Neighboring plates

Philadelphia PA · 16 MI 16 miles southeast Allentown PA · 28 MI 28 miles north New York NY · 78 MI 78 miles northeast Hempstead NY · 93 MI 93 miles east Baltimore MD · 94 MI 94 miles southwest Washington DC · 129 MI 129 miles southwest
FORECASTCITY
Atlas plate of Upper Gwynedd, Pennsylvania. Explore the plate
PENNSYLVANIA · MONTGOMERY

Upper Gwynedd

17,407 people, 330 ft above sea level in Montgomery County.

330 ftElevation
17,407People
8 sq miLand
Sunny 70°
SunnyDew point 59°
1

Today in Upper Gwynedd

NEXT 15 HOURS
Now partly cloudy day 71° 0%
7p partly cloudy night 68° 1%
10p partly cloudy night 64° 1%
1a mostly clear night 61° 0%
4a partly cloudy night 59° 0%
7a partly cloudy day 58° 0%
Rain
NEXT RAINFriday · 40%
→
Tue0%
Partly cloudy Partly cloudy
58
71
A
Wed0%
Partly cloudy Partly cloudy
62
77
B
Thu0%
Partly cloudy Partly cloudy
64
79
B
Fri40%
Chance of showers Chance of showers
59
83
B
Sat40%
Chance of showers; cooler Chance of showers; cooler
54
70
C
Sun40%
Chance of showers Chance of showers
53
66
C
Mon10%
Mostly sunny Mostly sunny
45
65
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
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