Monthly outlook for North Princeton, NJ: average high 87.5°, average low 66.2°. That is 2.8° above the climate normal for August. Precipitation is expected on 6 days (about 0.5 inches), against a normal of 6 days and 2.3 inches. The warmest day looks like 23 August (97.3°), the coolest 15 August (55.8°).
87.5°/66.2°
Average high / low
+2.8°
Above normal
6 / 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°
83.2°
+0.2°
19 August – 28 August
93.9°
81.7°
+6.8°
29 August – 7 September
at normal
80.3°
—
August records over 66 years
101.1°9 August 2001All-time high
47.3°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Dayton (8 mi).
Mon, 1088° / 70°0.05
88 °
North Princeton, Monday, 10 August
Rain. High 88°, low 70°.
Pressure29.97 inHg
Wind7.3 mph W
Humidity38%
Visibility6.2 mi
Dew point61°
Tue, 1189° / 70°0.13
89 °
North Princeton, Tuesday, 11 August
Rain. High 89°, low 70°.
Pressure29.85 inHg
Wind9.1 mph NW
Humidity48%
Visibility6.2 mi
Dew point63°
Wed, 1284° / 71°0
84 °
North Princeton, Wednesday, 12 August
Overcast. High 84°, low 71°.
Pressure29.74 inHg
Wind10 mph W
Humidity55%
Visibility6.2 mi
Dew point66°
Thu, 1383° / 65°0.05
83 °
North Princeton, Thursday, 13 August
Light rain. High 83°, low 65°.
Pressure29.74 inHg
Wind13.4 mph NW
Humidity40%
Visibility—
Dew point54°
Fri, 1477° / 57°0
77 °
North Princeton, Friday, 14 August
Mostly clear. High 77°, low 57°.
Pressure30.00 inHg
Wind14.8 mph NW
Humidity33%
Visibility—
Dew point44°
Sat, 1578° / 56°0
78 °
North Princeton, Saturday, 15 August
Clear. High 78°, low 56°.
Pressure30.09 inHg
Wind13.5 mph NW
Humidity30%
Visibility—
Dew point42°
Sun, 1680° / 56°0
80 °
North Princeton, Sunday, 16 August
Overcast. High 80°, low 56°.
Pressure30.12 inHg
Wind8 mph NW
Humidity27%
Visibility—
Dew point41°
Mon, 1783° / 61°0
83 °
North Princeton, Monday, 17 August
Overcast. High 83°, low 61°.
Pressure30.00 inHg
Wind7.5 mph SW
Humidity40%
Visibility—
Dew point49°
Tue, 1887° / 63°0
87 °
North Princeton, Tuesday, 18 August
Partly cloudy. High 87°, low 63°.
Pressure30.00 inHg
Wind7.1 mph S
Humidity35%
Visibility—
Dew point53°
Wed, 1989° / 68°0
89 °
North Princeton, Wednesday, 19 August
Overcast. High 89°, low 68°.
Pressure30.06 inHg
Wind8.2 mph SE
Humidity32%
Visibility—
Dew point53°
Thu, 2092° / 65°0
92 °
North Princeton, Thursday, 20 August
Clear. High 92°, low 65°.
Pressure30.00 inHg
Wind10.1 mph SE
Humidity31%
Visibility—
Dew point55°
Fri, 2196° / 70°0.06
96 °
North Princeton, Friday, 21 August
Light rain. High 96°, low 70°.
Pressure29.83 inHg
Wind12 mph SW
Humidity37%
Visibility—
Dew point62°
Sat, 2294° / 72°0.01
94 °
North Princeton, Saturday, 22 August
Light rain. High 94°, low 72°.
Pressure29.88 inHg
Wind8.9 mph NW
Humidity41%
Visibility—
Dew point64°
Sun, 2397° / 70°0
97 °
North Princeton, Sunday, 23 August
Clear. High 97°, low 70°.
Pressure29.91 inHg
Wind7.5 mph W
Humidity26%
Visibility—
Dew point53°
Mon, 2495° / 74°0.17
95 °
North Princeton, Monday, 24 August
Light rain. High 95°, low 74°.
Pressure29.94 inHg
Wind4 mph SW
Humidity46%
Visibility—
Dew point67°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 65°0.07
82 °
North Princeton, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation22%
Record high97° (1968)
Record low53° (1971)
Wed, 2682° / 65°0.07
82 °
North Princeton, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation25%
Record high93° (1993)
Record low56° (1960)
Thu, 2783° / 66°0.16
83 °
North Princeton, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.16 in
Chance of precipitation35%
Record high93° (2020)
Record low57° (2017)
Fri, 2882° / 67°0.22
82 °
North Princeton, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.22 in
Chance of precipitation42%
Record high96° (1973)
Record low55° (2025)
Sat, 2981° / 66°0.13
81 °
North Princeton, 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° (1986)
Sun, 3082° / 65°0.07
82 °
North Princeton, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation27%
Record high96° (1973)
Record low47° (1986)
Mon, 3182° / 65°0.07
82 °
North Princeton, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation20%
Record high95° (1973)
Record low51° (1976)
Tue, 0180° / 64°0.12
80 °
North Princeton, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.12 in
Chance of precipitation33%
Record high94° (2010)
Record low54° (2017)
Wed, 0280° / 64°0.15
80 °
North Princeton, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.15 in
Chance of precipitation33%
Record high96° (1980)
Record low53° (2017)
Thu, 0380° / 64°0.13
80 °
North Princeton, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.13 in
Chance of precipitation35%
Record high92° (1993)
Record low49° (1967)
Fri, 0480° / 64°0.09
80 °
North Princeton, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.09 in
Chance of precipitation25%
Record high94° (2023)
Record low53° (1997)
Sat, 0580° / 64°0.06
80 °
North Princeton, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.06 in
Chance of precipitation22%
Record high96° (2023)
Record low53° (1997)
Sun, 0679° / 63°0.19
79 °
North Princeton, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.19 in
Chance of precipitation33%
Record high96° (2023)
Record low51° (1984)
Mon, 0780° / 63°0.11
80 °
North Princeton, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation30%
Record high93° (2023)
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 North Princeton, 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 North Princeton, 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.