Monthly outlook for Millcreek, PA: average high 75.4°, average low 64.1°. That is 0.2° below the climate normal for August. Precipitation is expected on 5 days (about 1.4 inches), against a normal of 7 days and 2.4 inches. The warmest day looks like 9 August (85.5°), the coolest 22 August (57.8°).
75.4°/64.1°
Average high / low
−0.2°
Below normal
5 / 7
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
75.9°
76.2°
-0.2°
19 August – 28 August
74.6°
75.2°
-0.4°
29 August – 7 September
at normal
74°
—
August records over 66 years
91.9°3 August 1988All-time high
50.4°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Erie (3 mi).
Mon, 1080° / 71°0.17
80 °
Millcreek, Monday, 10 August
Rain. High 80°, low 71°.
Pressure29.94 inHg
Wind15.8 mph SW
Humidity88%
Visibility6.2 mi
Dew point69°
Tue, 1180° / 66°0.51
80 °
Millcreek, Tuesday, 11 August
Rain. High 80°, low 66°.
Pressure29.91 inHg
Wind9.8 mph SW
Humidity72%
Visibility6.2 mi
Dew point67°
Wed, 1275° / 69°0.13
75 °
Millcreek, Wednesday, 12 August
Light rain. High 75°, low 69°.
Pressure29.77 inHg
Wind10.9 mph W
Humidity78%
Visibility6.2 mi
Dew point66°
Thu, 1370° / 63°0.04
70 °
Millcreek, Thursday, 13 August
Light rain. High 70°, low 63°.
Pressure29.94 inHg
Wind20 mph NW
Humidity55%
Visibility—
Dew point52°
Fri, 1472° / 60°0.02
72 °
Millcreek, Friday, 14 August
Light rain. High 72°, low 60°.
Pressure30.09 inHg
Wind13 mph W
Humidity53%
Visibility—
Dew point51°
Sat, 1570° / 61°0.02
70 °
Millcreek, Saturday, 15 August
Light rain. High 70°, low 61°.
Pressure30.27 inHg
Wind7.5 mph N
Humidity54%
Visibility—
Dew point51°
Sun, 1673° / 60°0
73 °
Millcreek, Sunday, 16 August
Overcast. High 73°, low 60°.
Pressure30.18 inHg
Wind7.8 mph S
Humidity55%
Visibility—
Dew point54°
Mon, 1776° / 63°0
76 °
Millcreek, Monday, 17 August
Overcast. High 76°, low 63°.
Pressure30.03 inHg
Wind6.9 mph N
Humidity53%
Visibility—
Dew point56°
Tue, 1878° / 62°0
78 °
Millcreek, Tuesday, 18 August
Partly cloudy. High 78°, low 62°.
Pressure30.00 inHg
Wind6.4 mph S
Humidity50%
Visibility—
Dew point56°
Wed, 1981° / 66°0.37
81 °
Millcreek, Wednesday, 19 August
Rain. High 81°, low 66°.
Pressure29.77 inHg
Wind17 mph W
Humidity61%
Visibility—
Dew point64°
Thu, 2072° / 63°0.17
72 °
Millcreek, Thursday, 20 August
Light rain. High 72°, low 63°.
Pressure29.83 inHg
Wind22.8 mph NW
Humidity74%
Visibility—
Dew point57°
Fri, 2169° / 62°0
69 °
Millcreek, Friday, 21 August
Mostly clear. High 69°, low 62°.
Pressure30.03 inHg
Wind12.5 mph N
Humidity48%
Visibility—
Dew point47°
Sat, 2272° / 58°0
72 °
Millcreek, Saturday, 22 August
Overcast. High 72°, low 58°.
Pressure30.03 inHg
Wind10.1 mph S
Humidity49%
Visibility—
Dew point50°
Sun, 2381° / 67°0
81 °
Millcreek, Sunday, 23 August
Overcast. High 81°, low 67°.
Pressure29.83 inHg
Wind22 mph SW
Humidity62%
Visibility—
Dew point65°
Mon, 2472° / 65°0
72 °
Millcreek, Monday, 24 August
Clear. High 72°, low 65°.
Pressure30.00 inHg
Wind14.4 mph W
Humidity59%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2576° / 65°0.15
76 °
Millcreek, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high76°
Average low65°
Average precipitation0.15 in
Chance of precipitation38%
Record high84° (1962)
Record low56° (1963)
Wed, 2676° / 65°0.11
76 °
Millcreek, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high76°
Average low65°
Average precipitation0.11 in
Chance of precipitation35%
Record high85° (1993)
Record low56° (1963)
Thu, 2776° / 66°0.18
76 °
Millcreek, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high76°
Average low66°
Average precipitation0.18 in
Chance of precipitation47%
Record high87° (2024)
Record low56° (1969)
Fri, 2876° / 66°0.18
76 °
Millcreek, Friday, 28 August
Climate normal for this date — 60-year average.
Average high76°
Average low66°
Average precipitation0.18 in
Chance of precipitation48%
Record high86° (2018)
Record low53° (1986)
Sat, 2975° / 65°0.16
75 °
Millcreek, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.16 in
Chance of precipitation37%
Record high85° (2018)
Record low52° (1982)
Sun, 3075° / 65°0.12
75 °
Millcreek, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.12 in
Chance of precipitation42%
Record high87° (1991)
Record low50° (1965)
Mon, 3174° / 64°0.17
74 °
Millcreek, Monday, 31 August
Climate normal for this date — 60-year average.
Average high74°
Average low64°
Average precipitation0.17 in
Chance of precipitation35%
Record high87° (1962)
Record low54° (2025)
Tue, 0174° / 64°0.08
74 °
Millcreek, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high74°
Average low64°
Average precipitation0.08 in
Chance of precipitation25%
Record high86° (1973)
Record low55° (2023)
Wed, 0275° / 64°0.18
75 °
Millcreek, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high75°
Average low64°
Average precipitation0.18 in
Chance of precipitation45%
Record high87° (2011)
Record low55° (2017)
Thu, 0374° / 64°0.14
74 °
Millcreek, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high74°
Average low64°
Average precipitation0.14 in
Chance of precipitation40%
Record high88° (2011)
Record low53° (2024)
Fri, 0474° / 64°0.15
74 °
Millcreek, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low64°
Average precipitation0.15 in
Chance of precipitation38%
Record high87° (1973)
Record low54° (1987)
Sat, 0573° / 64°0.11
73 °
Millcreek, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high73°
Average low64°
Average precipitation0.11 in
Chance of precipitation38%
Record high87° (2018)
Record low53° (1974)
Sun, 0673° / 63°0.09
73 °
Millcreek, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high73°
Average low63°
Average precipitation0.09 in
Chance of precipitation40%
Record high88° (2007)
Record low51° (2000)
Mon, 0773° / 63°0.15
73 °
Millcreek, Monday, 7 September
Climate normal for this date — 60-year average.
Average high73°
Average low63°
Average precipitation0.15 in
Chance of precipitation42%
Record high84° (1960)
Record low51° (1962)
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 Millcreek, 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 Millcreek, 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.