As of 23:44 EDT

Weather in Allegheny, PA

70°

Allegheny, Saturday, 8 August, 23:44

Mostly clear. Feels like 71°. High 82°, low 66°.

Pressure30.00 inHg

Wind2 mph SW

Humidity97%

Visibility6.2 mi

Dew point69°

See detailed hourly forecast

Sun, 0984° / 65°

84 °

Allegheny, Sunday, 9 August

Clear. High 84°, low 65°.

Pressure30.06 inHg

Wind4.5 mph W

Humidity48%

Visibility6.2 mi

Dew point59°

Mon, 1081° / 67°

0.19

81 °

Allegheny, Monday, 10 August

Rain. High 81°, low 67°.

Pressure30.03 inHg

Wind9 mph SW

Humidity89%

Visibility6.2 mi

Dew point67°

Tue, 1182° / 61°

0.2

82 °

Allegheny, Tuesday, 11 August

Rain. High 82°, low 61°.

Pressure29.94 inHg

Wind7.3 mph SW

Humidity61%

Visibility6.2 mi

Dew point64°

Wed, 1283° / 64°

0.08

83 °

Allegheny, Wednesday, 12 August

Light rain. High 83°, low 64°.

Pressure29.77 inHg

Wind8.9 mph W

Humidity65%

Visibility6.2 mi

Dew point66°

Thu, 1372° / 54°

0.02

72 °

Allegheny, Thursday, 13 August

Light rain. High 72°, low 54°.

Pressure29.94 inHg

Wind11.3 mph NW

Humidity38%

Visibility—

Dew point43°

Fri, 1474° / 50°

74 °

Allegheny, Friday, 14 August

Clear. High 74°, low 50°.

Pressure30.06 inHg

Wind8.5 mph NW

Humidity40%

Visibility—

Dew point46°

Sat, 1575° / 52°

75 °

Allegheny, Saturday, 15 August

Mostly clear. High 75°, low 52°.

Pressure30.24 inHg

Wind8.6 mph NW

Humidity36%

Visibility—

Dew point44°

Sun, 1678° / 50°

78 °

Allegheny, Sunday, 16 August

Overcast. High 78°, low 50°.

Pressure30.15 inHg

Wind4.1 mph SW

Humidity33%

Visibility—

Dew point44°

Mon, 1780° / 56°

80 °

Allegheny, Monday, 17 August

Overcast. High 80°, low 56°.

Pressure30.03 inHg

Wind7 mph SW

Humidity39%

Visibility—

Dew point50°

Tue, 1882° / 56°

82 °

Allegheny, Tuesday, 18 August

Clear. High 82°, low 56°.

Pressure30.00 inHg

Wind3.7 mph SW

Humidity45%

Visibility—

Dew point56°

Wed, 1980° / 62°

1.12

80 °

Allegheny, Wednesday, 19 August

Heavy rain. High 80°, low 62°.

Pressure29.83 inHg

Wind9.6 mph W

Humidity51%

Visibility—

Dew point58°

Thu, 2067° / 56°

0.07

67 °

Allegheny, Thursday, 20 August

Light rain. High 67°, low 56°.

Pressure29.83 inHg

Wind13.5 mph NW

Humidity75%

Visibility—

Dew point56°

Fri, 2172° / 48°

72 °

Allegheny, Friday, 21 August

Mostly clear. High 72°, low 48°.

Pressure29.97 inHg

Wind9.9 mph NW

Humidity37%

Visibility—

Dew point42°

Sat, 2275° / 48°

0.02

75 °

Allegheny, Saturday, 22 August

Light rain. High 75°, low 48°.

Pressure30.03 inHg

Wind6.2 mph S

Humidity35%

Visibility—

Dew point42°

Sun, 2385° / 59°

0.03

85 °

Allegheny, Sunday, 23 August

Light rain. High 85°, low 59°.

Pressure29.88 inHg

Wind9.8 mph SW

Humidity67%

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.