Monthly outlook for Prospect Heights, NJ: average high 84°, average low 66.6°. That is 0.9° above the climate normal for August. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 6 days and 2.3 inches. The warmest day looks like 10 August (94.2°), the coolest 22 August (57.7°).
84°/66.6°
Average high / low
+0.9°
Above normal
3 / 6
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
85°
83.1°
+1.1°
19 August – 28 August
82.3°
81.6°
+0.4°
29 August – 7 September
at normal
80.2°
—
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).
Mon, 1094° / 73°0
94 °
Prospect Heights, Monday, 10 August
Partly cloudy. High 94°, low 73°.
Pressure29.97 inHg
Wind8 mph W
Humidity37%
Visibility6.2 mi
Dew point61°
Tue, 1194° / 75°0
94 °
Prospect Heights, Tuesday, 11 August
Overcast. High 94°, low 75°.
Pressure29.88 inHg
Wind5.7 mph NW
Humidity45%
Visibility6.2 mi
Dew point65°
Wed, 1285° / 76°0
85 °
Prospect Heights, Wednesday, 12 August
Overcast. High 85°, low 76°.
Pressure29.71 inHg
Wind11 mph NW
Humidity53%
Visibility6.2 mi
Dew point66°
Thu, 1387° / 68°0
87 °
Prospect Heights, Thursday, 13 August
Clear. High 87°, low 68°.
Pressure29.77 inHg
Wind13.1 mph NW
Humidity34%
Visibility—
Dew point54°
Fri, 1480° / 61°0
80 °
Prospect Heights, Friday, 14 August
Clear. High 80°, low 61°.
Pressure30.00 inHg
Wind9.6 mph NW
Humidity28%
Visibility—
Dew point42°
Sat, 1583° / 62°0
83 °
Prospect Heights, Saturday, 15 August
Clear. High 83°, low 62°.
Pressure30.12 inHg
Wind11.5 mph NW
Humidity30%
Visibility—
Dew point45°
Sun, 1683° / 60°0
83 °
Prospect Heights, Sunday, 16 August
Overcast. High 83°, low 60°.
Pressure30.15 inHg
Wind7.7 mph SE
Humidity28%
Visibility—
Dew point44°
Mon, 1782° / 64°0.07
82 °
Prospect Heights, Monday, 17 August
Light rain. High 82°, low 64°.
Pressure30.09 inHg
Wind10.7 mph S
Humidity47%
Visibility—
Dew point58°
Tue, 1871° / 65°0.14
71 °
Prospect Heights, Tuesday, 18 August
Light rain. High 71°, low 65°.
Pressure30.09 inHg
Wind5.8 mph SE
Humidity77%
Visibility—
Dew point62°
Wed, 1981° / 66°0.02
81 °
Prospect Heights, Wednesday, 19 August
Light rain. High 81°, low 66°.
Pressure29.94 inHg
Wind10.1 mph S
Humidity71%
Visibility—
Dew point62°
Thu, 2081° / 68°1.21
81 °
Prospect Heights, Thursday, 20 August
Heavy rain. High 81°, low 68°.
Pressure29.65 inHg
Wind13.3 mph W
Humidity41%
Visibility—
Dew point54°
Fri, 2180° / 63°0
80 °
Prospect Heights, Friday, 21 August
Clear. High 80°, low 63°.
Pressure29.83 inHg
Wind12.4 mph NW
Humidity33%
Visibility—
Dew point46°
Sat, 2280° / 58°0
80 °
Prospect Heights, Saturday, 22 August
Clear. High 80°, low 58°.
Pressure30.06 inHg
Wind6.2 mph NW
Humidity29%
Visibility—
Dew point43°
Sun, 2384° / 63°0
84 °
Prospect Heights, Sunday, 23 August
Overcast. High 84°, low 63°.
Pressure29.97 inHg
Wind12.3 mph S
Humidity56%
Visibility—
Dew point63°
Mon, 2488° / 71°0.01
88 °
Prospect Heights, Monday, 24 August
Light rain. High 88°, low 71°.
Pressure29.88 inHg
Wind11.5 mph W
Humidity36%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 65°0.07
82 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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 °
Prospect Heights, 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)
Mon, 0780° / 62°0.11
80 °
Prospect Heights, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.11 in
Chance of precipitation28%
Record high91° (1998)
Record low48° (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 Prospect Heights, NJ 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 Prospect Heights, NJ 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.