Monthly outlook for Harrisonville, NJ: average high 87.6°, average low 68.2°. That is 2.9° above the climate normal for August. Precipitation is expected on 5 days (about 0.5 inches), against a normal of 6 days and 2.1 inches. The warmest day looks like 23 August (96.8°), the coolest 16 August (59.2°).
87.6°/68.2°
Average high / low
+2.9°
Above normal
5 / 6
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
83.7°
83.1°
+0.3°
19 August – 28 August
94.1°
81.8°
+6.8°
29 August – 7 September
at normal
80.6°
—
August records over 66 years
98.1°28 August 2024All-time high
48.6°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Bellefonte (13 mi).
Mon, 1089° / 72°0
89 °
Harrisonville, Monday, 10 August
Partly cloudy. High 89°, low 72°.
Pressure30.00 inHg
Wind6.2 mph W
Humidity40%
Visibility6.2 mi
Dew point63°
Tue, 1189° / 72°0.06
89 °
Harrisonville, Tuesday, 11 August
Light rain. High 89°, low 72°.
Pressure29.88 inHg
Wind12.8 mph NW
Humidity48%
Visibility6.2 mi
Dew point64°
Wed, 1286° / 71°0.06
86 °
Harrisonville, Wednesday, 12 August
Light rain. High 86°, low 71°.
Pressure29.77 inHg
Wind12.7 mph W
Humidity55%
Visibility6.2 mi
Dew point66°
Thu, 1386° / 71°0.05
86 °
Harrisonville, Thursday, 13 August
Light rain. High 86°, low 71°.
Pressure29.77 inHg
Wind16.2 mph W
Humidity40%
Visibility—
Dew point57°
Fri, 1477° / 64°0
77 °
Harrisonville, Friday, 14 August
Overcast. High 77°, low 64°.
Pressure30.03 inHg
Wind13.2 mph W
Humidity36%
Visibility—
Dew point46°
Sat, 1579° / 60°0
79 °
Harrisonville, Saturday, 15 August
Clear. High 79°, low 60°.
Pressure30.12 inHg
Wind13 mph NW
Humidity34%
Visibility—
Dew point45°
Sun, 1681° / 59°0
81 °
Harrisonville, Sunday, 16 August
Overcast. High 81°, low 59°.
Pressure30.12 inHg
Wind7.8 mph NW
Humidity28%
Visibility—
Dew point43°
Mon, 1776° / 60°0
76 °
Harrisonville, Monday, 17 August
Overcast. High 76°, low 60°.
Pressure30.03 inHg
Wind9.6 mph S
Humidity53%
Visibility—
Dew point55°
Tue, 1887° / 64°0.03
87 °
Harrisonville, Tuesday, 18 August
Light rain. High 87°, low 64°.
Pressure30.00 inHg
Wind10 mph S
Humidity38%
Visibility—
Dew point56°
Wed, 1989° / 65°0
89 °
Harrisonville, Wednesday, 19 August
Clear. High 89°, low 65°.
Pressure30.06 inHg
Wind8.5 mph S
Humidity31%
Visibility—
Dew point53°
Thu, 2092° / 67°0
92 °
Harrisonville, Thursday, 20 August
Mostly clear. High 92°, low 67°.
Pressure30.00 inHg
Wind9.1 mph S
Humidity31%
Visibility—
Dew point55°
Fri, 2196° / 69°0.17
96 °
Harrisonville, Friday, 21 August
Rain. High 96°, low 69°.
Pressure29.85 inHg
Wind12.8 mph SW
Humidity38%
Visibility—
Dew point64°
Sat, 2295° / 73°0.1
95 °
Harrisonville, Saturday, 22 August
Light rain. High 95°, low 73°.
Pressure29.85 inHg
Wind11 mph NW
Humidity46%
Visibility—
Dew point69°
Sun, 2397° / 74°0
97 °
Harrisonville, Sunday, 23 August
Clear. High 97°, low 74°.
Pressure29.91 inHg
Wind6.2 mph NE
Humidity29%
Visibility—
Dew point56°
Mon, 2495° / 76°0
95 °
Harrisonville, Monday, 24 August
Overcast. High 95°, low 76°.
Pressure29.91 inHg
Wind8 mph W
Humidity46%
Visibility—
Dew point69°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 65°0.06
83 °
Harrisonville, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.06 in
Chance of precipitation12%
Record high94° (1968)
Record low55° (1987)
Wed, 2683° / 66°0.06
83 °
Harrisonville, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.06 in
Chance of precipitation22%
Record high92° (1975)
Record low56° (1977)
Thu, 2783° / 67°0.17
83 °
Harrisonville, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.17 in
Chance of precipitation33%
Record high91° (1980)
Record low56° (1963)
Fri, 2883° / 67°0.24
83 °
Harrisonville, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.24 in
Chance of precipitation47%
Record high98° (2024)
Record low56° (2025)
Sat, 2982° / 67°0.12
82 °
Harrisonville, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.12 in
Chance of precipitation23%
Record high93° (1973)
Record low50° (1982)
Sun, 3082° / 66°0.08
82 °
Harrisonville, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.08 in
Chance of precipitation27%
Record high94° (1973)
Record low49° (1986)
Mon, 3182° / 66°0.07
82 °
Harrisonville, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.07 in
Chance of precipitation18%
Record high95° (2010)
Record low51° (1986)
Tue, 0180° / 65°0.14
80 °
Harrisonville, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.14 in
Chance of precipitation30%
Record high93° (2010)
Record low55° (1967)
Wed, 0280° / 64°0.11
80 °
Harrisonville, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.11 in
Chance of precipitation35%
Record high94° (1980)
Record low54° (1970)
Thu, 0381° / 65°0.13
81 °
Harrisonville, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.13 in
Chance of precipitation35%
Record high93° (2023)
Record low50° (1967)
Fri, 0481° / 65°0.09
81 °
Harrisonville, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.09 in
Chance of precipitation25%
Record high96° (2023)
Record low53° (2024)
Sat, 0580° / 65°0.11
80 °
Harrisonville, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.11 in
Chance of precipitation32%
Record high97° (2023)
Record low53° (1997)
Sun, 0679° / 64°0.23
79 °
Harrisonville, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.23 in
Chance of precipitation30%
Record high97° (2023)
Record low52° (1984)
Mon, 0780° / 63°0.11
80 °
Harrisonville, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation28%
Record high91° (1998)
Record low49° (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 Harrisonville, 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 Harrisonville, 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.