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As of 03:41 EDT

Weather in Allegheny, PA

67°Current weather

Allegheny, Sunday, 9 August, 03:41

Clear. Feels like 68°. High 84°, low 66°.

Pressure30.00 inHg
Wind3.2 mph SW
Humidity98%
Visibility6.2 mi
Dew point66°
Mon, 1079° / 65°0.55Heavy rain
79 °Heavy rain

Allegheny, Monday, 10 August

Heavy rain. High 79°, low 65°.

Pressure29.97 inHg
Wind10.9 mph SW
Humidity69%
Visibility6.2 mi
Dew point64°
Tue, 1184° / 61°0.79Heavy rain
84 °Heavy rain

Allegheny, Tuesday, 11 August

Heavy rain. High 84°, low 61°.

Pressure29.94 inHg
Wind7.3 mph W
Humidity58%
Visibility6.2 mi
Dew point62°
Wed, 1280° / 62°0.02Light rain
80 °Light rain

Allegheny, Wednesday, 12 August

Light rain. High 80°, low 62°.

Pressure29.80 inHg
Wind6.8 mph SW
Humidity93%
Visibility6.2 mi
Dew point65°
Thu, 1371° / 56°0.16Light rain
71 °Light rain

Allegheny, Thursday, 13 August

Light rain. High 71°, low 56°.

Pressure29.91 inHg
Wind12.8 mph NW
Humidity41%
Visibility—
Dew point45°
Fri, 1469° / 50°0Mostly clear
69 °Mostly clear

Allegheny, Friday, 14 August

Mostly clear. High 69°, low 50°.

Pressure30.09 inHg
Wind10.4 mph NW
Humidity45%
Visibility—
Dew point45°
Sat, 1570° / 46°0Partly cloudy
70 °Partly cloudy

Allegheny, Saturday, 15 August

Partly cloudy. High 70°, low 46°.

Pressure30.24 inHg
Wind9.2 mph N
Humidity38%
Visibility—
Dew point41°
Sun, 1671° / 48°0Overcast
71 °Overcast

Allegheny, Sunday, 16 August

Overcast. High 71°, low 48°.

Pressure30.15 inHg
Wind2 mph W
Humidity57%
Visibility—
Dew point51°
Mon, 1776° / 52°0Light rain
76 °Light rain

Allegheny, Monday, 17 August

Light rain. High 76°, low 52°.

Pressure30.00 inHg
Wind6.7 mph NW
Humidity40%
Visibility—
Dew point47°
Tue, 1879° / 56°0Clear
79 °Clear

Allegheny, Tuesday, 18 August

Clear. High 79°, low 56°.

Pressure30.03 inHg
Wind6.6 mph NW
Humidity39%
Visibility—
Dew point49°
Wed, 1982° / 55°0Mostly clear
82 °Mostly clear

Allegheny, Wednesday, 19 August

Mostly clear. High 82°, low 55°.

Pressure30.06 inHg
Wind3.6 mph W
Humidity35%
Visibility—
Dew point49°
Thu, 2087° / 59°0Clear
87 °Clear

Allegheny, Thursday, 20 August

Clear. High 87°, low 59°.

Pressure29.94 inHg
Wind9.6 mph S
Humidity38%
Visibility—
Dew point55°
Fri, 2193° / 67°0.02Light rain
93 °Light rain

Allegheny, Friday, 21 August

Light rain. High 93°, low 67°.

Pressure29.83 inHg
Wind9.3 mph NW
Humidity49%
Visibility—
Dew point67°
Sat, 2287° / 60°0Clear
87 °Clear

Allegheny, Saturday, 22 August

Clear. High 87°, low 60°.

Pressure29.97 inHg
Wind5.3 mph N
Humidity31%
Visibility—
Dew point49°
Sun, 2390° / 64°0.02Light rain
90 °Light rain

Allegheny, Sunday, 23 August

Light rain. High 90°, low 64°.

Pressure29.94 inHg
Wind6.3 mph W
Humidity49%
Visibility—
Dew point62°
Mon, 2486° / 68°0.15Light rain
86 °Light rain

Allegheny, Monday, 24 August

Light rain. High 86°, low 68°.

Pressure30.00 inHg
Wind7.9 mph N
Humidity59%
Visibility—
Dew point68°

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.