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As of 21:31 EDT

Weather in Allegheny, PA

69°Current weather

Allegheny, Saturday, 8 August, 21:31

Clear. Feels like 70°. High 80°, low 65°.

Pressure30.06 inHg
Wind5.6 mph W
Humidity99%
Visibility6.2 mi
Dew point69°
Sun, 0981° / 65°0Clear
81 °Clear

Allegheny, Sunday, 9 August

Clear. High 81°, low 65°.

Pressure30.09 inHg
Wind9.1 mph W
Humidity56%
Visibility6.2 mi
Dew point61°
Mon, 1085° / 64°0.19Rain
85 °Rain

Allegheny, Monday, 10 August

Rain. High 85°, low 64°.

Pressure30.03 inHg
Wind5.2 mph W
Humidity82%
Visibility6.2 mi
Dew point65°
Tue, 1180° / 62°0.31Heavy rain
80 °Heavy rain

Allegheny, Tuesday, 11 August

Heavy rain. High 80°, low 62°.

Pressure30.00 inHg
Wind8.3 mph W
Humidity82%
Visibility6.2 mi
Dew point64°
Wed, 1277° / 68°0.01Light rain
77 °Light rain

Allegheny, Wednesday, 12 August

Light rain. High 77°, low 68°.

Pressure29.80 inHg
Wind15 mph W
Humidity70%
Visibility6.2 mi
Dew point66°
Thu, 1372° / 55°0.01Light rain
72 °Light rain

Allegheny, Thursday, 13 August

Light rain. High 72°, low 55°.

Pressure29.91 inHg
Wind14.4 mph NW
Humidity49%
Visibility—
Dew point50°
Fri, 1473° / 52°0Mostly clear
73 °Mostly clear

Allegheny, Friday, 14 August

Mostly clear. High 73°, low 52°.

Pressure30.06 inHg
Wind10 mph NW
Humidity43%
Visibility—
Dew point47°
Sat, 1573° / 52°0Clear
73 °Clear

Allegheny, Saturday, 15 August

Clear. High 73°, low 52°.

Pressure30.21 inHg
Wind10.5 mph NW
Humidity43%
Visibility—
Dew point47°
Sun, 1678° / 53°0Partly cloudy
78 °Partly cloudy

Allegheny, Sunday, 16 August

Partly cloudy. High 78°, low 53°.

Pressure30.15 inHg
Wind5.4 mph SE
Humidity43%
Visibility—
Dew point50°
Mon, 1768° / 58°0.03Light rain
68 °Light rain

Allegheny, Monday, 17 August

Light rain. High 68°, low 58°.

Pressure30.09 inHg
Wind3.6 mph SE
Humidity87%
Visibility—
Dew point60°
Tue, 1875° / 61°0.07Light rain
75 °Light rain

Allegheny, Tuesday, 18 August

Light rain. High 75°, low 61°.

Pressure30.03 inHg
Wind5.3 mph SE
Humidity65%
Visibility—
Dew point61°
Wed, 1982° / 62°0.06Light rain
82 °Light rain

Allegheny, Wednesday, 19 August

Light rain. High 82°, low 62°.

Pressure29.85 inHg
Wind8.3 mph W
Humidity49%
Visibility—
Dew point58°
Thu, 2067° / 58°0.15Rain
67 °Rain

Allegheny, Thursday, 20 August

Rain. High 67°, low 58°.

Pressure29.80 inHg
Wind15.7 mph NW
Humidity64%
Visibility—
Dew point53°
Fri, 2170° / 53°0Clear
70 °Clear

Allegheny, Friday, 21 August

Clear. High 70°, low 53°.

Pressure29.97 inHg
Wind12.7 mph NW
Humidity44%
Visibility—
Dew point45°
Sat, 2277° / 49°0Partly cloudy
77 °Partly cloudy

Allegheny, Saturday, 22 August

Partly cloudy. High 77°, low 49°.

Pressure30.03 inHg
Wind5.9 mph SE
Humidity37%
Visibility—
Dew point45°
Sun, 2383° / 62°0.01Light rain
83 °Light rain

Allegheny, Sunday, 23 August

Light rain. High 83°, low 62°.

Pressure29.91 inHg
Wind14.7 mph W
Humidity59%
Visibility—
Dew point65°

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 Allegheny, 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 Allegheny, 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.