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As of 15:30 EDT

Weather in South Williamsport, PA

87°Current weather

South Williamsport, Sunday, 9 August, 15:30

Clear. Feels like 92°. High 87°, low 70°.

Pressure30.00 inHg
Wind5 mph W
Humidity56%
Visibility6.2 mi
Dew point69°
Mon, 1075° / 65°0.2Rain
75 °Rain

South Williamsport, Monday, 10 August

Rain. High 75°, low 65°.

Pressure30.00 inHg
Wind1.1 mph SW
Humidity82%
Visibility6.2 mi
Dew point66°
Tue, 1184° / 66°0.11Light rain
84 °Light rain

South Williamsport, Tuesday, 11 August

Light rain. High 84°, low 66°.

Pressure29.91 inHg
Wind9.6 mph W
Humidity59%
Visibility6.2 mi
Dew point65°
Wed, 1278° / 65°0.07Light rain
78 °Light rain

South Williamsport, Wednesday, 12 August

Light rain. High 78°, low 65°.

Pressure29.80 inHg
Wind2.5 mph NW
Humidity89%
Visibility6.2 mi
Dew point66°
Thu, 1381° / 61°0Overcast
81 °Overcast

South Williamsport, Thursday, 13 August

Overcast. High 81°, low 61°.

Pressure29.91 inHg
Wind9.7 mph NW
Humidity38%
Visibility6.2 mi
Dew point49°
Fri, 1476° / 58°0Overcast
76 °Overcast

South Williamsport, Friday, 14 August

Overcast. High 76°, low 58°.

Pressure30.12 inHg
Wind5 mph E
Humidity57%
Visibility—
Dew point56°
Sat, 1582° / 62°0Partly cloudy
82 °Partly cloudy

South Williamsport, Saturday, 15 August

Partly cloudy. High 82°, low 62°.

Pressure30.12 inHg
Wind3.7 mph SE
Humidity51%
Visibility—
Dew point60°
Sun, 1693° / 65°0.08Light rain
93 °Light rain

South Williamsport, Sunday, 16 August

Light rain. High 93°, low 65°.

Pressure29.74 inHg
Wind12.5 mph W
Humidity50%
Visibility—
Dew point67°
Mon, 1780° / 62°0Overcast
80 °Overcast

South Williamsport, Monday, 17 August

Overcast. High 80°, low 62°.

Pressure30.00 inHg
Wind9.6 mph N
Humidity39%
Visibility—
Dew point51°
Tue, 1883° / 61°0.11Light rain
83 °Light rain

South Williamsport, Tuesday, 18 August

Light rain. High 83°, low 61°.

Pressure30.00 inHg
Wind9.1 mph S
Humidity46%
Visibility—
Dew point57°
Wed, 1990° / 62°0.08Light rain
90 °Light rain

South Williamsport, Wednesday, 19 August

Light rain. High 90°, low 62°.

Pressure29.88 inHg
Wind12.6 mph NW
Humidity36%
Visibility—
Dew point57°
Thu, 2085° / 58°0Light rain
85 °Light rain

South Williamsport, Thursday, 20 August

Light rain. High 85°, low 58°.

Pressure29.94 inHg
Wind3.6 mph NW
Humidity38%
Visibility—
Dew point54°
Fri, 2186° / 61°0.03Light rain
86 °Light rain

South Williamsport, Friday, 21 August

Light rain. High 86°, low 61°.

Pressure29.77 inHg
Wind10.8 mph NW
Humidity56%
Visibility—
Dew point64°
Sat, 2284° / 63°0Overcast
84 °Overcast

South Williamsport, Saturday, 22 August

Overcast. High 84°, low 63°.

Pressure29.91 inHg
Wind4.3 mph NE
Humidity44%
Visibility—
Dew point57°
Sun, 2385° / 58°0.01Light rain
85 °Light rain

South Williamsport, Sunday, 23 August

Light rain. High 85°, low 58°.

Pressure30.00 inHg
Wind5.9 mph S
Humidity46%
Visibility—
Dew point60°
Mon, 2489° / 65°0.09Light rain
89 °Light rain

South Williamsport, Monday, 24 August

Light rain. High 89°, low 65°.

Pressure29.94 inHg
Wind8.4 mph W
Humidity35%
Visibility—
Dew point55°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for South Williamsport, PA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in South Williamsport, PA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.