Monthly outlook for Charmian, PA: average high 79.6°, average low 60.7°. That is 2.1° below the climate normal for August. Precipitation is expected on 5 days (about 1.3 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 10 August (90.5°), the coolest 15 August (51.9°).
79.6°/60.7°
Average high / low
−2.1°
Below normal
5 / 5
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82°
84.1°
-1.2°
18 August – 27 August
75.6°
82.5°
-3.8°
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, 0983° / 68°0
83 °
Charmian, Sunday, 9 August
Partly cloudy. High 83°, low 68°.
Pressure30.03 inHg
Wind9.9 mph NW
Humidity40%
Visibility6.2 mi
Dew point60°
Mon, 1090° / 65°0.17
90 °
Charmian, Monday, 10 August
Rain. High 90°, low 65°.
Pressure30.06 inHg
Wind11.2 mph NW
Humidity50%
Visibility6.2 mi
Dew point64°
Tue, 1186° / 64°0.03
86 °
Charmian, Tuesday, 11 August
Light rain. High 86°, low 64°.
Pressure29.97 inHg
Wind11.2 mph W
Humidity53%
Visibility6.2 mi
Dew point62°
Wed, 1280° / 64°0.4
80 °
Charmian, Wednesday, 12 August
Light rain. High 80°, low 64°.
Pressure29.83 inHg
Wind10.1 mph W
Humidity69%
Visibility6.2 mi
Dew point67°
Thu, 1384° / 65°0
84 °
Charmian, Thursday, 13 August
Partly cloudy. High 84°, low 65°.
Pressure29.80 inHg
Wind13.1 mph NW
Humidity42%
Visibility—
Dew point56°
Fri, 1477° / 57°0.07
77 °
Charmian, Friday, 14 August
Light rain. High 77°, low 57°.
Pressure29.97 inHg
Wind13.5 mph N
Humidity37%
Visibility—
Dew point46°
Sat, 1575° / 52°0
75 °
Charmian, Saturday, 15 August
Clear. High 75°, low 52°.
Pressure30.21 inHg
Wind9.9 mph N
Humidity35%
Visibility—
Dew point42°
Sun, 1676° / 53°0
76 °
Charmian, Sunday, 16 August
Clear. High 76°, low 53°.
Pressure30.30 inHg
Wind6.2 mph NE
Humidity31%
Visibility—
Dew point40°
Mon, 1783° / 56°0
83 °
Charmian, Monday, 17 August
Partly cloudy. High 83°, low 56°.
Pressure30.12 inHg
Wind8 mph S
Humidity45%
Visibility—
Dew point55°
Tue, 1874° / 63°0.2
74 °
Charmian, Tuesday, 18 August
Light rain. High 74°, low 63°.
Pressure29.97 inHg
Wind7.1 mph SW
Humidity77%
Visibility—
Dew point65°
Wed, 1981° / 63°0
81 °
Charmian, Wednesday, 19 August
Partly cloudy. High 81°, low 63°.
Pressure29.91 inHg
Wind11.2 mph N
Humidity40%
Visibility—
Dew point52°
Thu, 2077° / 58°0
77 °
Charmian, Thursday, 20 August
Overcast. High 77°, low 58°.
Pressure30.00 inHg
Wind6.8 mph SE
Humidity54%
Visibility—
Dew point51°
Fri, 2167° / 58°0.4
67 °
Charmian, Friday, 21 August
Rain. High 67°, low 58°.
Pressure29.85 inHg
Wind4.1 mph E
Humidity98%
Visibility—
Dew point66°
Sat, 2282° / 63°0
82 °
Charmian, Saturday, 22 August
Clear. High 82°, low 63°.
Pressure29.80 inHg
Wind12.5 mph NW
Humidity39%
Visibility—
Dew point52°
Sun, 2373° / 54°0
73 °
Charmian, Sunday, 23 August
Clear. High 73°, low 54°.
Pressure30.06 inHg
Wind15 mph NW
Humidity28%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 64°0.06
82 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 °
Charmian, 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 Charmian, 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 Charmian, 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.