Monthly outlook for Philadelphia, NY: average high 75.9°, average low 57.2°. That is 0.3° above the climate normal for August. Precipitation is expected on 9 days (about 4.3 inches), against a normal of 7 days and 2.0 inches. The warmest day looks like 9 August (83.6°), the coolest 22 August (45.1°).
75.9°/57.2°
Average high / low
+0.3°
Above normal
9 / 7
Wet days / normal
4.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
77°
76.2°
+0.4°
18 August – 27 August
74.2°
74.2°
+0°
28 August – 6 September
at normal
73.1°
—
August records over 66 years
92.1°14 August 2002All-time high
43.2°30 August 1965All-time low
Sun, 0984° / 67°0.06
84 °
Philadelphia, Sunday, 9 August
Rain. High 84°, low 67°.
Pressure29.97 inHg
Wind10.3 mph W
Humidity58%
Visibility6.2 mi
Dew point60°
Mon, 1078° / 64°0.19
78 °
Philadelphia, Monday, 10 August
Light rain. High 78°, low 64°.
Pressure29.91 inHg
Wind10.6 mph SW
Humidity75%
Visibility6.2 mi
Dew point64°
Tue, 1179° / 61°0
79 °
Philadelphia, Tuesday, 11 August
Light rain. High 79°, low 61°.
Pressure29.85 inHg
Wind10.2 mph W
Humidity56%
Visibility6.2 mi
Dew point60°
Wed, 1278° / 59°0.1
78 °
Philadelphia, Wednesday, 12 August
Light rain. High 78°, low 59°.
Pressure29.74 inHg
Wind6.2 mph W
Humidity58%
Visibility6.2 mi
Dew point60°
Thu, 1371° / 58°0.07
71 °
Philadelphia, Thursday, 13 August
Light rain. High 71°, low 58°.
Pressure29.77 inHg
Wind9.4 mph NW
Humidity47%
Visibility—
Dew point49°
Fri, 1471° / 50°0.06
71 °
Philadelphia, Friday, 14 August
Light rain. High 71°, low 50°.
Pressure29.97 inHg
Wind9.8 mph W
Humidity44%
Visibility—
Dew point46°
Sat, 1572° / 51°0
72 °
Philadelphia, Saturday, 15 August
Clear. High 72°, low 51°.
Pressure30.15 inHg
Wind10 mph NW
Humidity38%
Visibility—
Dew point43°
Sun, 1674° / 50°0
74 °
Philadelphia, Sunday, 16 August
Clear. High 74°, low 50°.
Pressure30.18 inHg
Wind5.4 mph SE
Humidity40%
Visibility—
Dew point46°
Mon, 1780° / 56°0.02
80 °
Philadelphia, Monday, 17 August
Light rain. High 80°, low 56°.
Pressure30.03 inHg
Wind9.6 mph W
Humidity44%
Visibility—
Dew point54°
Tue, 1881° / 60°0
81 °
Philadelphia, Tuesday, 18 August
Light rain. High 81°, low 60°.
Pressure29.97 inHg
Wind9 mph W
Humidity47%
Visibility—
Dew point57°
Wed, 1981° / 63°1.72
81 °
Philadelphia, Wednesday, 19 August
Heavy rain. High 81°, low 63°.
Pressure29.74 inHg
Wind12.4 mph SW
Humidity58%
Visibility—
Dew point63°
Thu, 2067° / 56°1.47
67 °
Philadelphia, Thursday, 20 August
Heavy rain. High 67°, low 56°.
Pressure29.53 inHg
Wind10.4 mph W
Humidity90%
Visibility—
Dew point63°
Fri, 2170° / 52°0
70 °
Philadelphia, Friday, 21 August
Clear. High 70°, low 52°.
Pressure29.85 inHg
Wind12.3 mph NW
Humidity46%
Visibility—
Dew point46°
Sat, 2268° / 45°0
68 °
Philadelphia, Saturday, 22 August
Clear. High 68°, low 45°.
Pressure30.06 inHg
Wind7.5 mph W
Humidity41%
Visibility—
Dew point41°
Sun, 2378° / 54°0.5
78 °
Philadelphia, Sunday, 23 August
Rain. High 78°, low 54°.
Pressure29.85 inHg
Wind11.1 mph S
Humidity54%
Visibility—
Dew point58°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2473° / 59°0.14
73 °
Philadelphia, Monday, 24 August
Climate normal for this date — 60-year average.
Average high73°
Average low59°
Average precipitation0.14 in
Chance of precipitation33%
Record high84° (2020)
Record low44° (1971)
Tue, 2574° / 60°0.09
74 °
Philadelphia, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high74°
Average low60°
Average precipitation0.09 in
Chance of precipitation30%
Record high86° (2021)
Record low47° (1989)
Wed, 2675° / 60°0.07
75 °
Philadelphia, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.07 in
Chance of precipitation33%
Record high85° (2021)
Record low49° (1977)
Thu, 2774° / 60°0.11
74 °
Philadelphia, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high74°
Average low60°
Average precipitation0.11 in
Chance of precipitation43%
Record high85° (1993)
Record low46° (1989)
Fri, 2875° / 60°0.14
75 °
Philadelphia, Friday, 28 August
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.14 in
Chance of precipitation43%
Record high86° (2018)
Record low47° (1986)
Sat, 2974° / 60°0.13
74 °
Philadelphia, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high74°
Average low60°
Average precipitation0.13 in
Chance of precipitation42%
Record high88° (2022)
Record low44° (1986)
Sun, 3073° / 58°0.12
73 °
Philadelphia, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.12 in
Chance of precipitation42%
Record high87° (1991)
Record low43° (1965)
Mon, 3173° / 58°0.17
73 °
Philadelphia, Monday, 31 August
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.17 in
Chance of precipitation37%
Record high87° (1973)
Record low44° (1976)
Tue, 0173° / 58°0.06
73 °
Philadelphia, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.06 in
Chance of precipitation23%
Record high86° (2010)
Record low48° (1985)
Wed, 0273° / 58°0.13
73 °
Philadelphia, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.13 in
Chance of precipitation32%
Record high85° (2010)
Record low42° (2017)
Thu, 0373° / 58°0.16
73 °
Philadelphia, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.16 in
Chance of precipitation37%
Record high87° (2010)
Record low43° (1976)
Fri, 0472° / 58°0.09
72 °
Philadelphia, Friday, 4 September
Climate normal for this date — 60-year average.
Average high72°
Average low58°
Average precipitation0.09 in
Chance of precipitation30%
Record high92° (1999)
Record low46° (1987)
Sat, 0573° / 58°0.07
73 °
Philadelphia, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.07 in
Chance of precipitation32%
Record high90° (2018)
Record low44° (2000)
Sun, 0673° / 58°0.13
73 °
Philadelphia, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.13 in
Chance of precipitation33%
Record high87° (2023)
Record low43° (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 Philadelphia, NY 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 Philadelphia, NY 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.