Monthly outlook for Trappe, PA: average high 80.5°, average low 64.6°. That is 0.9° below the climate normal for August. Precipitation is expected on 7 days (about 2.4 inches), against a normal of 6 days and 2.1 inches. The warmest day looks like 9 August (88°), the coolest 15 August (55°).
80.5°/64.6°
Average high / low
−0.9°
Below normal
7 / 6
Wet days / normal
2.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82.6°
82.9°
-0.2°
18 August – 27 August
77.1°
81.3°
-2.3°
28 August – 6 September
at normal
80.2°
—
August records over 66 years
99°9 August 2001All-time high
46.9°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Bryn Mawr (15 mi).
Sun, 0988° / 70°0.02
88 °
Trappe, Sunday, 9 August
Light rain. High 88°, low 70°.
Pressure30.00 inHg
Wind7.5 mph W
Humidity52%
Visibility6.2 mi
Dew point67°
Mon, 1086° / 71°0.07
86 °
Trappe, Monday, 10 August
Rain. High 86°, low 71°.
Pressure30.00 inHg
Wind7.8 mph W
Humidity56%
Visibility6.2 mi
Dew point67°
Tue, 1186° / 70°0.07
86 °
Trappe, Tuesday, 11 August
Light rain. High 86°, low 70°.
Pressure29.91 inHg
Wind5.5 mph W
Humidity64%
Visibility6.2 mi
Dew point70°
Wed, 1281° / 70°0.54
81 °
Trappe, Wednesday, 12 August
Heavy rain. High 81°, low 70°.
Pressure29.80 inHg
Wind9.3 mph W
Humidity64%
Visibility6.2 mi
Dew point67°
Thu, 1385° / 66°0
85 °
Trappe, Thursday, 13 August
Overcast. High 85°, low 66°.
Pressure29.77 inHg
Wind12.8 mph W
Humidity49%
Visibility—
Dew point62°
Fri, 1477° / 63°0
77 °
Trappe, Friday, 14 August
Partly cloudy. High 77°, low 63°.
Pressure29.97 inHg
Wind7.9 mph N
Humidity39%
Visibility—
Dew point47°
Sat, 1577° / 55°0
77 °
Trappe, Saturday, 15 August
Clear. High 77°, low 55°.
Pressure30.18 inHg
Wind10.8 mph N
Humidity38%
Visibility—
Dew point46°
Sun, 1679° / 55°0
79 °
Trappe, Sunday, 16 August
Clear. High 79°, low 55°.
Pressure30.27 inHg
Wind5.3 mph NW
Humidity38%
Visibility—
Dew point49°
Mon, 1781° / 59°0
81 °
Trappe, Monday, 17 August
Overcast. High 81°, low 59°.
Pressure30.15 inHg
Wind10.4 mph S
Humidity50%
Visibility—
Dew point59°
Tue, 1879° / 68°0.13
79 °
Trappe, Tuesday, 18 August
Light rain. High 79°, low 68°.
Pressure29.94 inHg
Wind8.4 mph SW
Humidity80%
Visibility—
Dew point67°
Wed, 1984° / 66°0.02
84 °
Trappe, Wednesday, 19 August
Light rain. High 84°, low 66°.
Pressure29.85 inHg
Wind11.4 mph N
Humidity43%
Visibility—
Dew point57°
Thu, 2071° / 61°0
71 °
Trappe, Thursday, 20 August
Overcast. High 71°, low 61°.
Pressure30.00 inHg
Wind5.6 mph NW
Humidity68%
Visibility—
Dew point57°
Fri, 2174° / 63°1.16
74 °
Trappe, Friday, 21 August
Heavy rain. High 74°, low 63°.
Pressure29.85 inHg
Wind12 mph S
Humidity92%
Visibility—
Dew point71°
Sat, 2283° / 67°0.06
83 °
Trappe, Saturday, 22 August
Light rain. High 83°, low 67°.
Pressure29.77 inHg
Wind7.2 mph W
Humidity59%
Visibility—
Dew point63°
Sun, 2372° / 57°0
72 °
Trappe, Sunday, 23 August
Clear. High 72°, low 57°.
Pressure30.00 inHg
Wind15.6 mph NW
Humidity40%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2481° / 64°0.06
81 °
Trappe, Monday, 24 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.06 in
Chance of precipitation18%
Record high92° (1968)
Record low53° (1971)
Tue, 2582° / 65°0.06
82 °
Trappe, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.06 in
Chance of precipitation15%
Record high95° (1968)
Record low53° (1987)
Wed, 2682° / 65°0.06
82 °
Trappe, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.06 in
Chance of precipitation23%
Record high91° (1993)
Record low54° (1977)
Thu, 2783° / 66°0.18
83 °
Trappe, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.18 in
Chance of precipitation33%
Record high93° (2020)
Record low55° (1963)
Fri, 2882° / 67°0.24
82 °
Trappe, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.24 in
Chance of precipitation47%
Record high96° (2024)
Record low56° (1968)
Sat, 2981° / 66°0.11
81 °
Trappe, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.11 in
Chance of precipitation30%
Record high94° (2010)
Record low49° (1982)
Sun, 3081° / 65°0.06
81 °
Trappe, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.06 in
Chance of precipitation27%
Record high94° (1973)
Record low47° (1986)
Mon, 3181° / 65°0.07
81 °
Trappe, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.07 in
Chance of precipitation20%
Record high95° (2010)
Record low50° (1976)
Tue, 0180° / 64°0.14
80 °
Trappe, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.14 in
Chance of precipitation32%
Record high94° (2010)
Record low54° (1967)
Wed, 0280° / 64°0.11
80 °
Trappe, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.11 in
Chance of precipitation33%
Record high94° (1980)
Record low52° (1970)
Thu, 0380° / 64°0.15
80 °
Trappe, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.15 in
Chance of precipitation28%
Record high92° (2023)
Record low49° (1967)
Fri, 0480° / 64°0.09
80 °
Trappe, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.09 in
Chance of precipitation25%
Record high96° (2023)
Record low52° (1997)
Sat, 0579° / 64°0.08
79 °
Trappe, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.08 in
Chance of precipitation25%
Record high96° (2023)
Record low52° (1997)
Sun, 0678° / 63°0.21
78 °
Trappe, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.21 in
Chance of precipitation32%
Record high94° (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 Trappe, 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 Trappe, 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.