Now

67°

0.59 in

9 mph

20:00

65°

0.98 in

8 mph

21:00

64°

1.25 in

7 mph

22:00

63°

1.26 in

6 mph

23:00

63°

1.26 in

5 mph

00:00

63°

1.26 in

4 mph

01:00

62°

1.26 in

4 mph

02:00

62°

1.26 in

4 mph

03:00

61°

1.26 in

4 mph

04:00

61°

1.26 in

5 mph

05:00

61°

1.26 in

5 mph

06:00

55°

19%

5 mph

07:00

56°

19%

5 mph

08:00

59°

13%

4 mph

09:00

59°

4 mph

10:00

65°

6 mph

11:00

69°

5 mph

12:00

71°

5 mph

13:00

73°

5 mph

14:00

74°

10%

6 mph

15:00

74°

10%

6 mph

16:00

74°

10%

6 mph

17:00

72°

10%

6 mph

18:00

69°

5 mph

10-day forecast

Updated 7:01 PM

Thu · Today · 20 Aug Sunny

77° 63° 6.09 in

Fri · Tomorrow · 21 Aug Sunny

74° 55° 7.54 in

Saturday · 22 Aug Mostly cloudy

73° 59° 0.13 in

Sunday · 23 Aug Fog

68° 59° 0.09 in

Monday · 24 Aug Sunny

70° 56° 5%

Tuesday · 25 Aug Mostly cloudy

69° 52° 9%

Wednesday · 26 Aug Sunny

76° 58° 11%

Thursday · 27 Aug Mostly cloudy

67° 60° 0.03 in

Friday · 28 Aug Fog

73° 59° 0.02 in

Saturday · 29 Aug Showers

70° 61° 0.21 in

Details & indices

Wind

9 mph N

Gusts 26 mph

Humidity

91%

Dew point 64°

Pressure

30.00 inHg

Rising

UV index

1 — Low

High today

Air Quality

Good

AQI 33 · US EPA

Allergy

Low

Grass

Visibility

6 mi

Clear view

Allergy — Sun Valley

🌿 Conditions right now

View all →

Birch

None

Grass

Low

Oak

None

Alder

None

Hazel

None

Mugwort

Low

Ragweed

None

Sun & moon

Sunrise6:16 AM

Sunset7:53 PM

Length of day13h 37m

Moonrise2:56 PM

Moonset11:45 PM

Moon phase🌓 First Quarter · 58%

Next full moonAug 28 Sturgeon Moon

Latitude40.9820°N

Longitude-75.4660°E

Water temps nearby

View all →

No beaches within 50 miles

🌧️Rain now — should taper off around 7:15 PM (13 min)

Now+30+60+90 min

Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast

Laundry day

Poor

Line-drying weather

Grilling

Fair

Fire up the grill

Running

Poor

Lace up outside

Patio

Fair

Dinner outdoors

Nearby places in {{REGION}}

Data sources · Thursday, August 20

Where the Sun Valley forecast comes from

This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 40.9820°N, -75.4660°.

NBM + global weather models

Updated: 7:01 PM

Weather in Sun Valley

The 10-day span for Sun Valley runs from a high near 77° on Thursday down to 52° overnight on Tuesday. Roughly 14.1 in of rain falls over the period, with Saturday the most likely wet day (85%). Wind is the one to watch: gusts to 26 mph around Thursday. Heads up: 2 NWS alerts are active right now, including a Flood Watch — details on the alerts tab. Right now Sun Valley is about 21° cooler than nearby Washington. Longer view: classic Northeast mix — nor'easters, humid spells and a glorious fall.

Sun Valley, PA · Elev 1,184 ft · 40.98°N, 75.47°W · Pennsylvania · Forecast computed for these exact coordinates

Sun Valley, PA Weather (18330)

Weather map — Sun Valley

Today · Thu 8/20

Tonight · Thu 8/20

Tomorrow · Fri 8/21

7-day trend

10-day forecast

Details & indices

🌿 Conditions right now

Sun & moon

Water temps nearby

Daily planner