Monthly outlook for Spring Valley, PA: average high 80.7°, average low 65.2°. That is 1° below the climate normal for August. Precipitation is expected on 7 days (about 2.3 inches), against a normal of 6 days and 2.3 inches. The warmest day looks like 11 August (88.9°), the coolest 16 August (56.6°).
80.7°/65.2°
Average high / low
−1°
Below normal
7 / 6
Wet days / normal
2.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
83°
83.2°
-0.1°
18 August – 27 August
76.8°
81.6°
-2.7°
28 August – 6 September
at normal
80.5°
—
August records over 66 years
99.7°9 August 2001All-time high
46.9°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Trevose (13 mi).
Sun, 0988° / 69°0.01
88 °
Spring Valley, Sunday, 9 August
Light rain. High 88°, low 69°.
Pressure30.00 inHg
Wind7.1 mph W
Humidity48%
Visibility6.2 mi
Dew point65°
Mon, 1087° / 71°0.04
87 °
Spring Valley, Monday, 10 August
Light rain. High 87°, low 71°.
Pressure30.00 inHg
Wind7.1 mph W
Humidity49%
Visibility6.2 mi
Dew point64°
Tue, 1189° / 70°0.04
89 °
Spring Valley, Tuesday, 11 August
Light rain. High 89°, low 70°.
Pressure29.88 inHg
Wind4.1 mph NW
Humidity56%
Visibility6.2 mi
Dew point68°
Wed, 1282° / 70°0.52
82 °
Spring Valley, Wednesday, 12 August
Heavy rain. High 82°, low 70°.
Pressure29.77 inHg
Wind8.5 mph W
Humidity61%
Visibility6.2 mi
Dew point66°
Thu, 1386° / 67°0
86 °
Spring Valley, Thursday, 13 August
Light rain. High 86°, low 67°.
Pressure29.77 inHg
Wind13 mph NW
Humidity44%
Visibility—
Dew point60°
Fri, 1476° / 62°0
76 °
Spring Valley, Friday, 14 August
Partly cloudy. High 76°, low 62°.
Pressure29.94 inHg
Wind8.6 mph N
Humidity35%
Visibility—
Dew point45°
Sat, 1576° / 57°0
76 °
Spring Valley, Saturday, 15 August
Clear. High 76°, low 57°.
Pressure30.15 inHg
Wind9.8 mph N
Humidity34%
Visibility—
Dew point43°
Sun, 1679° / 57°0
79 °
Spring Valley, Sunday, 16 August
Clear. High 79°, low 57°.
Pressure30.27 inHg
Wind5.3 mph N
Humidity33%
Visibility—
Dew point45°
Mon, 1782° / 62°0
82 °
Spring Valley, Monday, 17 August
Overcast. High 82°, low 62°.
Pressure30.15 inHg
Wind9.6 mph S
Humidity41%
Visibility—
Dew point54°
Tue, 1876° / 68°0.07
76 °
Spring Valley, Tuesday, 18 August
Light rain. High 76°, low 68°.
Pressure29.94 inHg
Wind8.7 mph SW
Humidity79%
Visibility—
Dew point66°
Wed, 1984° / 67°0.01
84 °
Spring Valley, Wednesday, 19 August
Light rain. High 84°, low 67°.
Pressure29.85 inHg
Wind10 mph NW
Humidity39%
Visibility—
Dew point55°
Thu, 2073° / 62°0
73 °
Spring Valley, Thursday, 20 August
Overcast. High 73°, low 62°.
Pressure29.97 inHg
Wind5.6 mph SW
Humidity57%
Visibility—
Dew point56°
Fri, 2175° / 65°1.35
75 °
Spring Valley, Friday, 21 August
Heavy rain. High 75°, low 65°.
Pressure29.88 inHg
Wind8.1 mph SE
Humidity79%
Visibility—
Dew point67°
Sat, 2282° / 67°0.11
82 °
Spring Valley, Saturday, 22 August
Light rain. High 82°, low 67°.
Pressure29.74 inHg
Wind8.4 mph W
Humidity59%
Visibility—
Dew point62°
Sun, 2372° / 58°0
72 °
Spring Valley, Sunday, 23 August
Clear. High 72°, low 58°.
Pressure30.00 inHg
Wind13.7 mph NW
Humidity38%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2481° / 64°0.07
81 °
Spring Valley, Monday, 24 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.07 in
Chance of precipitation20%
Record high92° (1998)
Record low53° (1971)
Tue, 2582° / 65°0.07
82 °
Spring Valley, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation17%
Record high96° (1968)
Record low53° (1987)
Wed, 2682° / 65°0.07
82 °
Spring Valley, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation23%
Record high92° (1993)
Record low55° (1963)
Thu, 2783° / 66°0.18
83 °
Spring Valley, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.18 in
Chance of precipitation35%
Record high92° (1993)
Record low56° (1963)
Fri, 2882° / 67°0.23
82 °
Spring Valley, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.23 in
Chance of precipitation42%
Record high95° (2024)
Record low56° (1986)
Sat, 2981° / 66°0.13
81 °
Spring Valley, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.13 in
Chance of precipitation30%
Record high94° (2010)
Record low49° (1982)
Sun, 3082° / 65°0.06
82 °
Spring Valley, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.06 in
Chance of precipitation33%
Record high94° (1973)
Record low47° (1986)
Mon, 3181° / 65°0.08
81 °
Spring Valley, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.08 in
Chance of precipitation20%
Record high96° (2010)
Record low51° (1976)
Tue, 0180° / 64°0.13
80 °
Spring Valley, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.13 in
Chance of precipitation30%
Record high94° (2010)
Record low55° (1967)
Wed, 0280° / 64°0.13
80 °
Spring Valley, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.13 in
Chance of precipitation35%
Record high94° (2010)
Record low53° (1970)
Thu, 0380° / 64°0.15
80 °
Spring Valley, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.15 in
Chance of precipitation32%
Record high93° (2015)
Record low49° (1967)
Fri, 0480° / 64°0.1
80 °
Spring Valley, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.1 in
Chance of precipitation28%
Record high96° (2023)
Record low52° (1997)
Sat, 0580° / 64°0.07
80 °
Spring Valley, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation28%
Record high95° (2023)
Record low53° (1997)
Sun, 0679° / 63°0.21
79 °
Spring Valley, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.21 in
Chance of precipitation35%
Record high95° (2023)
Record low51° (1984)
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 Spring Valley, 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 Spring Valley, 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.