Monthly outlook for Glenfield, PA: average high 78.8°, average low 61.6°. That is 0.8° below the climate normal for August. Precipitation is expected on 8 days (about 1.6 inches), against a normal of 7 days and 2.2 inches. The warmest day looks like 10 August (87.8°), the coolest 15 August (52.6°).
78.8°/61.6°
Average high / low
−0.8°
Below normal
8 / 7
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
79.7°
80.6°
-0.5°
18 August – 27 August
77.2°
79.8°
-1.5°
28 August – 6 September
at normal
78.7°
—
August records over 66 years
96.6°17 August 1988All-time high
45°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Pittsburgh (10 mi).
Sun, 0986° / 67°0
86 °
Glenfield, Sunday, 9 August
Clear. High 86°, low 67°.
Pressure30.06 inHg
Wind4.9 mph W
Humidity46%
Visibility6.2 mi
Dew point59°
Mon, 1088° / 68°0.41
88 °
Glenfield, Monday, 10 August
Rain. High 88°, low 68°.
Pressure30.03 inHg
Wind9.1 mph S
Humidity87%
Visibility6.2 mi
Dew point70°
Tue, 1184° / 66°0.34
84 °
Glenfield, Tuesday, 11 August
Rain. High 84°, low 66°.
Pressure29.97 inHg
Wind6.7 mph W
Humidity67%
Visibility6.2 mi
Dew point68°
Wed, 1275° / 66°0.15
75 °
Glenfield, Wednesday, 12 August
Light rain. High 75°, low 66°.
Pressure29.83 inHg
Wind7.7 mph SW
Humidity93%
Visibility6.2 mi
Dew point70°
Thu, 1375° / 64°0.04
75 °
Glenfield, Thursday, 13 August
Light rain. High 75°, low 64°.
Pressure29.91 inHg
Wind10.1 mph N
Humidity69%
Visibility—
Dew point60°
Fri, 1474° / 57°0
74 °
Glenfield, Friday, 14 August
Mostly clear. High 74°, low 57°.
Pressure30.03 inHg
Wind8.5 mph N
Humidity43%
Visibility—
Dew point48°
Sat, 1573° / 53°0
73 °
Glenfield, Saturday, 15 August
Partly cloudy. High 73°, low 53°.
Pressure30.27 inHg
Wind8.3 mph N
Humidity40%
Visibility—
Dew point45°
Sun, 1677° / 54°0
77 °
Glenfield, Sunday, 16 August
Partly cloudy. High 77°, low 54°.
Pressure30.27 inHg
Wind4.7 mph E
Humidity37%
Visibility—
Dew point46°
Mon, 1781° / 58°0
81 °
Glenfield, Monday, 17 August
Overcast. High 81°, low 58°.
Pressure30.09 inHg
Wind5.8 mph SW
Humidity42%
Visibility—
Dew point53°
Tue, 1876° / 65°0.21
76 °
Glenfield, Tuesday, 18 August
Light rain. High 76°, low 65°.
Pressure29.97 inHg
Wind4.2 mph NW
Humidity82%
Visibility—
Dew point66°
Wed, 1979° / 59°0
79 °
Glenfield, Wednesday, 19 August
Overcast. High 79°, low 59°.
Pressure29.97 inHg
Wind7.1 mph N
Humidity44%
Visibility—
Dew point53°
Thu, 2080° / 63°0.07
80 °
Glenfield, Thursday, 20 August
Light rain. High 80°, low 63°.
Pressure29.94 inHg
Wind5 mph E
Humidity49%
Visibility—
Dew point57°
Fri, 2176° / 64°0.09
76 °
Glenfield, Friday, 21 August
Light rain. High 76°, low 64°.
Pressure29.83 inHg
Wind7.2 mph NW
Humidity74%
Visibility—
Dew point66°
Sat, 2281° / 60°0.02
81 °
Glenfield, Saturday, 22 August
Light rain. High 81°, low 60°.
Pressure29.83 inHg
Wind7.9 mph NW
Humidity45%
Visibility—
Dew point56°
Sun, 2371° / 53°0
71 °
Glenfield, Sunday, 23 August
Clear. High 71°, low 53°.
Pressure30.12 inHg
Wind8.5 mph N
Humidity40%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2479° / 62°0.05
79 °
Glenfield, Monday, 24 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.05 in
Chance of precipitation27%
Record high92° (2007)
Record low49° (1971)
Tue, 2580° / 62°0.09
80 °
Glenfield, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.09 in
Chance of precipitation28%
Record high90° (1993)
Record low51° (1977)
Wed, 2680° / 62°0.09
80 °
Glenfield, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.09 in
Chance of precipitation32%
Record high93° (1993)
Record low53° (1963)
Thu, 2781° / 64°0.13
81 °
Glenfield, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.13 in
Chance of precipitation43%
Record high93° (2024)
Record low52° (1969)
Fri, 2880° / 64°0.19
80 °
Glenfield, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.19 in
Chance of precipitation40%
Record high92° (1973)
Record low50° (1968)
Sat, 2980° / 63°0.12
80 °
Glenfield, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.12 in
Chance of precipitation40%
Record high91° (1991)
Record low45° (1982)
Sun, 3079° / 62°0.14
79 °
Glenfield, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.14 in
Chance of precipitation28%
Record high92° (1993)
Record low47° (1986)
Mon, 3178° / 62°0.16
78 °
Glenfield, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.16 in
Chance of precipitation37%
Record high93° (2012)
Record low51° (1976)
Tue, 0178° / 61°0.11
78 °
Glenfield, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.11 in
Chance of precipitation23%
Record high91° (2010)
Record low47° (1967)
Wed, 0279° / 61°0.13
79 °
Glenfield, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.13 in
Chance of precipitation42%
Record high93° (2010)
Record low49° (1967)
Thu, 0379° / 61°0.1
79 °
Glenfield, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.1 in
Chance of precipitation35%
Record high94° (2011)
Record low48° (1967)
Fri, 0478° / 62°0.09
78 °
Glenfield, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.09 in
Chance of precipitation35%
Record high91° (2023)
Record low48° (1997)
Sat, 0578° / 60°0.12
78 °
Glenfield, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.12 in
Chance of precipitation33%
Record high91° (2023)
Record low48° (1997)
Sun, 0678° / 60°0.14
78 °
Glenfield, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.14 in
Chance of precipitation32%
Record high92° (2023)
Record low46° (1984)
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 Glenfield, 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 Glenfield, 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.