Monthly outlook for Lower Mifflin, PA: average high 80.5°, average low 61.5°. That is 0.9° below the climate normal for August. Precipitation is expected on 6 days (about 1.4 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 10 August (87.7°), the coolest 22 August (51°).
80.5°/61.5°
Average high / low
−0.9°
Below normal
6 / 5
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
81.7°
83°
-0.7°
18 August – 27 August
78.3°
81.3°
-1.7°
28 August – 6 September
at normal
80.3°
—
August records over 66 years
97.9°3 August 2006All-time high
46.4°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Shippensburg University (13 mi).
Sun, 0984° / 69°0.05
84 °
Lower Mifflin, Sunday, 9 August
Light rain. High 84°, low 69°.
Pressure30.03 inHg
Wind8 mph NW
Humidity51%
Visibility6.2 mi
Dew point64°
Mon, 1088° / 69°0.07
88 °
Lower Mifflin, Monday, 10 August
Rain. High 88°, low 69°.
Pressure30.03 inHg
Wind2.3 mph SW
Humidity71%
Visibility6.2 mi
Dew point65°
Tue, 1187° / 66°0.3
87 °
Lower Mifflin, Tuesday, 11 August
Rain. High 87°, low 66°.
Pressure29.94 inHg
Wind6.9 mph W
Humidity56%
Visibility6.2 mi
Dew point65°
Wed, 1284° / 66°0.02
84 °
Lower Mifflin, Wednesday, 12 August
Light rain. High 84°, low 66°.
Pressure29.77 inHg
Wind11.6 mph NW
Humidity71%
Visibility6.2 mi
Dew point68°
Thu, 1379° / 63°0
79 °
Lower Mifflin, Thursday, 13 August
Mostly clear. High 79°, low 63°.
Pressure29.85 inHg
Wind14.3 mph NW
Humidity33%
Visibility—
Dew point46°
Fri, 1479° / 54°0
79 °
Lower Mifflin, Friday, 14 August
Clear. High 79°, low 54°.
Pressure30.03 inHg
Wind7.9 mph N
Humidity35%
Visibility—
Dew point45°
Sat, 1579° / 55°0
79 °
Lower Mifflin, Saturday, 15 August
Clear. High 79°, low 55°.
Pressure30.18 inHg
Wind10.4 mph N
Humidity34%
Visibility—
Dew point45°
Sun, 1681° / 55°0
81 °
Lower Mifflin, Sunday, 16 August
Overcast. High 81°, low 55°.
Pressure30.18 inHg
Wind6 mph E
Humidity37%
Visibility—
Dew point49°
Mon, 1775° / 61°0.06
75 °
Lower Mifflin, Monday, 17 August
Light rain. High 75°, low 61°.
Pressure30.06 inHg
Wind5.2 mph S
Humidity61%
Visibility—
Dew point59°
Tue, 1870° / 63°0.01
70 °
Lower Mifflin, Tuesday, 18 August
Light rain. High 70°, low 63°.
Pressure30.06 inHg
Wind4.9 mph E
Humidity86%
Visibility—
Dew point64°
Wed, 1985° / 65°0.43
85 °
Lower Mifflin, Wednesday, 19 August
Rain. High 85°, low 65°.
Pressure29.88 inHg
Wind8.3 mph SW
Humidity57%
Visibility—
Dew point62°
Thu, 2074° / 63°0.45
74 °
Lower Mifflin, Thursday, 20 August
Rain. High 74°, low 63°.
Pressure29.74 inHg
Wind16.5 mph NW
Humidity55%
Visibility—
Dew point54°
Fri, 2178° / 55°0
78 °
Lower Mifflin, Friday, 21 August
Clear. High 78°, low 55°.
Pressure29.91 inHg
Wind11.9 mph NW
Humidity33%
Visibility—
Dew point43°
Sat, 2279° / 51°0
79 °
Lower Mifflin, Saturday, 22 August
Overcast. High 79°, low 51°.
Pressure30.06 inHg
Wind4.4 mph E
Humidity28%
Visibility—
Dew point40°
Sun, 2385° / 61°0.02
85 °
Lower Mifflin, Sunday, 23 August
Light rain. High 85°, low 61°.
Pressure29.91 inHg
Wind8.5 mph SW
Humidity46%
Visibility—
Dew point59°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2481° / 63°0.05
81 °
Lower Mifflin, Monday, 24 August
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.05 in
Chance of precipitation22%
Record high92° (1968)
Record low51° (1971)
Tue, 2582° / 63°0.06
82 °
Lower Mifflin, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.06 in
Chance of precipitation25%
Record high94° (2007)
Record low52° (1987)
Wed, 2683° / 64°0.06
83 °
Lower Mifflin, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low64°
Average precipitation0.06 in
Chance of precipitation22%
Record high93° (1993)
Record low53° (1963)
Thu, 2783° / 65°0.15
83 °
Lower Mifflin, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.15 in
Chance of precipitation35%
Record high94° (1993)
Record low52° (2025)
Fri, 2883° / 65°0.16
83 °
Lower Mifflin, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.16 in
Chance of precipitation37%
Record high95° (1993)
Record low52° (1968)
Sat, 2982° / 64°0.08
82 °
Lower Mifflin, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.08 in
Chance of precipitation32%
Record high93° (1991)
Record low46° (1982)
Sun, 3081° / 63°0.05
81 °
Lower Mifflin, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.05 in
Chance of precipitation32%
Record high93° (1991)
Record low48° (1986)
Mon, 3181° / 63°0.09
81 °
Lower Mifflin, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.09 in
Chance of precipitation27%
Record high94° (1973)
Record low49° (1976)
Tue, 0179° / 62°0.13
79 °
Lower Mifflin, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.13 in
Chance of precipitation28%
Record high94° (2010)
Record low49° (1967)
Wed, 0280° / 62°0.1
80 °
Lower Mifflin, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.1 in
Chance of precipitation30%
Record high95° (2010)
Record low51° (1970)
Thu, 0380° / 62°0.06
80 °
Lower Mifflin, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.06 in
Chance of precipitation22%
Record high94° (2010)
Record low47° (1967)
Fri, 0480° / 63°0.11
80 °
Lower Mifflin, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation27%
Record high93° (2023)
Record low51° (2024)
Sat, 0579° / 62°0.07
79 °
Lower Mifflin, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation22%
Record high92° (2023)
Record low49° (1974)
Sun, 0679° / 61°0.2
79 °
Lower Mifflin, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.2 in
Chance of precipitation33%
Record high94° (2023)
Record low49° (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 Lower Mifflin, 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 Lower Mifflin, 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.