Monthly outlook for Glen Forney, PA: average high 81.2°, average low 62.5°. That is 1.2° below the climate normal for August. Precipitation is expected on 5 days (about 1.2 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 10 August (92.7°), the coolest 15 August (53.5°).
81.2°/62.5°
Average high / low
−1.2°
Below normal
5 / 5
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
83.5°
84.1°
-0.4°
18 August – 27 August
77.4°
82.5°
-2.8°
28 August – 6 September
at normal
81.7°
—
August records over 66 years
99.7°12 August 2021All-time high
48.9°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Hagerstown (15 mi).
Sun, 0985° / 69°0
85 °
Glen Forney, Sunday, 9 August
Partly cloudy. High 85°, low 69°.
Pressure30.03 inHg
Wind10.1 mph NW
Humidity40%
Visibility6.2 mi
Dew point60°
Mon, 1093° / 67°0.15
93 °
Glen Forney, Monday, 10 August
Rain. High 93°, low 67°.
Pressure30.06 inHg
Wind11.4 mph NW
Humidity51%
Visibility6.2 mi
Dew point64°
Tue, 1188° / 66°0.03
88 °
Glen Forney, Tuesday, 11 August
Light rain. High 88°, low 66°.
Pressure29.97 inHg
Wind11.2 mph W
Humidity53%
Visibility6.2 mi
Dew point63°
Wed, 1281° / 66°0.39
81 °
Glen Forney, Wednesday, 12 August
Light rain. High 81°, low 66°.
Pressure29.83 inHg
Wind10.3 mph W
Humidity69%
Visibility6.2 mi
Dew point67°
Thu, 1386° / 66°0
86 °
Glen Forney, Thursday, 13 August
Partly cloudy. High 86°, low 66°.
Pressure29.80 inHg
Wind13.1 mph NW
Humidity42%
Visibility—
Dew point58°
Fri, 1479° / 59°0.07
79 °
Glen Forney, Friday, 14 August
Light rain. High 79°, low 59°.
Pressure29.97 inHg
Wind12.8 mph N
Humidity37%
Visibility—
Dew point47°
Sat, 1577° / 53°0
77 °
Glen Forney, Saturday, 15 August
Clear. High 77°, low 53°.
Pressure30.21 inHg
Wind10 mph N
Humidity36%
Visibility—
Dew point44°
Sun, 1678° / 55°0
78 °
Glen Forney, Sunday, 16 August
Clear. High 78°, low 55°.
Pressure30.30 inHg
Wind6.2 mph NE
Humidity31%
Visibility—
Dew point42°
Mon, 1785° / 58°0
85 °
Glen Forney, Monday, 17 August
Partly cloudy. High 85°, low 58°.
Pressure30.12 inHg
Wind7.9 mph SW
Humidity44%
Visibility—
Dew point56°
Tue, 1875° / 65°0.2
75 °
Glen Forney, Tuesday, 18 August
Light rain. High 75°, low 65°.
Pressure29.97 inHg
Wind6.8 mph SW
Humidity77%
Visibility—
Dew point67°
Wed, 1983° / 65°0
83 °
Glen Forney, Wednesday, 19 August
Partly cloudy. High 83°, low 65°.
Pressure29.91 inHg
Wind11 mph N
Humidity40%
Visibility—
Dew point54°
Thu, 2079° / 59°0
79 °
Glen Forney, Thursday, 20 August
Overcast. High 79°, low 59°.
Pressure30.00 inHg
Wind6.7 mph SE
Humidity55%
Visibility—
Dew point53°
Fri, 2168° / 60°0.39
68 °
Glen Forney, Friday, 21 August
Rain. High 68°, low 60°.
Pressure29.85 inHg
Wind4.4 mph E
Humidity99%
Visibility—
Dew point67°
Sat, 2284° / 65°0
84 °
Glen Forney, Saturday, 22 August
Clear. High 84°, low 65°.
Pressure29.80 inHg
Wind12.5 mph NW
Humidity40%
Visibility—
Dew point55°
Sun, 2374° / 56°0
74 °
Glen Forney, Sunday, 23 August
Clear. High 74°, low 56°.
Pressure30.06 inHg
Wind15 mph NW
Humidity28%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 64°0.06
82 °
Glen Forney, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.06 in
Chance of precipitation22%
Record high95° (1968)
Record low54° (1971)
Tue, 2583° / 65°0.05
83 °
Glen Forney, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.05 in
Chance of precipitation15%
Record high95° (2007)
Record low54° (1971)
Wed, 2684° / 65°0.05
84 °
Glen Forney, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.05 in
Chance of precipitation20%
Record high94° (1975)
Record low55° (1963)
Thu, 2783° / 66°0.13
83 °
Glen Forney, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.13 in
Chance of precipitation37%
Record high94° (2020)
Record low53° (2025)
Fri, 2884° / 66°0.14
84 °
Glen Forney, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.14 in
Chance of precipitation33%
Record high97° (2024)
Record low52° (2025)
Sat, 2983° / 66°0.06
83 °
Glen Forney, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.06 in
Chance of precipitation27%
Record high94° (1973)
Record low49° (1982)
Sun, 3083° / 65°0.04
83 °
Glen Forney, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.04 in
Chance of precipitation25%
Record high93° (1973)
Record low49° (1986)
Mon, 3182° / 65°0.08
82 °
Glen Forney, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.08 in
Chance of precipitation27%
Record high95° (2012)
Record low52° (1976)
Tue, 0181° / 64°0.11
81 °
Glen Forney, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation32%
Record high95° (2010)
Record low51° (1967)
Wed, 0281° / 63°0.08
81 °
Glen Forney, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.08 in
Chance of precipitation25%
Record high96° (2010)
Record low53° (1967)
Thu, 0382° / 64°0.05
82 °
Glen Forney, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.05 in
Chance of precipitation23%
Record high94° (2010)
Record low49° (1967)
Fri, 0481° / 64°0.1
81 °
Glen Forney, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.1 in
Chance of precipitation27%
Record high94° (2023)
Record low50° (2024)
Sat, 0581° / 63°0.07
81 °
Glen Forney, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.07 in
Chance of precipitation25%
Record high94° (2023)
Record low51° (1997)
Sun, 0680° / 63°0.21
80 °
Glen Forney, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.21 in
Chance of precipitation32%
Record high94° (2023)
Record low50° (2000)
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 Glen Forney, 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 Glen Forney, 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.