Monthly outlook for Union, NJ: average high 84.2°, average low 68.9°. That is 1.1° above the climate normal for August. Precipitation is expected on 4 days (about 3.0 inches), against a normal of 6 days and 2.3 inches. The warmest day looks like 11 August (94.3°), the coolest 23 August (61.2°).
84.2°/68.9°
Average high / low
+1.1°
Above normal
4 / 6
Wet days / normal
3.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
86.4°
83°
+1.9°
18 August – 27 August
80.5°
81.1°
-0.3°
28 August – 6 September
at normal
80°
—
August records over 66 years
101.1°9 August 2001All-time high
50°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Avenel (8 mi).
Sun, 0991° / 73°0
91 °
Union, Sunday, 9 August
Light rain. High 91°, low 73°.
Pressure29.94 inHg
Wind7.4 mph W
Humidity38%
Visibility6.2 mi
Dew point62°
Mon, 1093° / 74°0.02
93 °
Union, Monday, 10 August
Light rain. High 93°, low 74°.
Pressure29.97 inHg
Wind6.1 mph SW
Humidity49%
Visibility6.2 mi
Dew point62°
Tue, 1194° / 75°0.03
94 °
Union, Tuesday, 11 August
Light rain. High 94°, low 75°.
Pressure29.88 inHg
Wind6.8 mph NW
Humidity32%
Visibility6.2 mi
Dew point56°
Wed, 1284° / 72°0.16
84 °
Union, Wednesday, 12 August
Light rain. High 84°, low 72°.
Pressure29.74 inHg
Wind6 mph W
Humidity51%
Visibility6.2 mi
Dew point64°
Thu, 1388° / 70°0
88 °
Union, Thursday, 13 August
Overcast. High 88°, low 70°.
Pressure29.74 inHg
Wind14.3 mph NW
Humidity38%
Visibility—
Dew point58°
Fri, 1480° / 67°0
80 °
Union, Friday, 14 August
Mostly clear. High 80°, low 67°.
Pressure29.91 inHg
Wind12 mph N
Humidity27%
Visibility—
Dew point41°
Sat, 1579° / 62°0
79 °
Union, Saturday, 15 August
Clear. High 79°, low 62°.
Pressure30.15 inHg
Wind13 mph NW
Humidity28%
Visibility—
Dew point41°
Sun, 1682° / 64°0
82 °
Union, Sunday, 16 August
Partly cloudy. High 82°, low 64°.
Pressure30.24 inHg
Wind6.2 mph SW
Humidity26%
Visibility—
Dew point42°
Mon, 1785° / 65°0
85 °
Union, Monday, 17 August
Partly cloudy. High 85°, low 65°.
Pressure30.15 inHg
Wind10.1 mph SW
Humidity28%
Visibility—
Dew point46°
Tue, 1882° / 71°0.09
82 °
Union, Tuesday, 18 August
Light rain. High 82°, low 71°.
Pressure29.91 inHg
Wind9.5 mph W
Humidity57%
Visibility—
Dew point64°
Wed, 1987° / 71°0
87 °
Union, Wednesday, 19 August
Clear. High 87°, low 71°.
Pressure29.83 inHg
Wind11.3 mph NW
Humidity36%
Visibility—
Dew point55°
Thu, 2083° / 69°0
83 °
Union, Thursday, 20 August
Overcast. High 83°, low 69°.
Pressure29.97 inHg
Wind6.7 mph N
Humidity38%
Visibility—
Dew point52°
Fri, 2177° / 70°2.34
77 °
Union, Friday, 21 August
Heavy rain. High 77°, low 70°.
Pressure29.91 inHg
Wind8.9 mph SW
Humidity75%
Visibility—
Dew point64°
Sat, 2282° / 68°0.3
82 °
Union, Saturday, 22 August
Rain. High 82°, low 68°.
Pressure29.74 inHg
Wind7.8 mph NW
Humidity57%
Visibility—
Dew point63°
Sun, 2373° / 61°0
73 °
Union, Sunday, 23 August
Clear. High 73°, low 61°.
Pressure29.97 inHg
Wind14.7 mph NW
Humidity38%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2481° / 65°0.06
81 °
Union, Monday, 24 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.06 in
Chance of precipitation23%
Record high93° (1998)
Record low54° (1971)
Tue, 2582° / 65°0.07
82 °
Union, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation18%
Record high96° (1968)
Record low55° (1971)
Wed, 2682° / 66°0.09
82 °
Union, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.09 in
Chance of precipitation23%
Record high92° (1993)
Record low56° (1963)
Thu, 2782° / 67°0.15
82 °
Union, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.15 in
Chance of precipitation35%
Record high93° (1980)
Record low58° (1969)
Fri, 2882° / 67°0.2
82 °
Union, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.2 in
Chance of precipitation42%
Record high95° (1973)
Record low57° (1986)
Sat, 2981° / 67°0.14
81 °
Union, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high81°
Average low67°
Average precipitation0.14 in
Chance of precipitation32%
Record high93° (2010)
Record low50° (1982)
Sun, 3081° / 66°0.06
81 °
Union, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.06 in
Chance of precipitation25%
Record high95° (1973)
Record low50° (1986)
Mon, 3181° / 65°0.07
81 °
Union, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.07 in
Chance of precipitation17%
Record high94° (2010)
Record low51° (1976)
Tue, 0179° / 65°0.13
79 °
Union, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.13 in
Chance of precipitation30%
Record high95° (2010)
Record low55° (2017)
Wed, 0279° / 64°0.16
79 °
Union, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.16 in
Chance of precipitation32%
Record high96° (1980)
Record low54° (1967)
Thu, 0380° / 65°0.13
80 °
Union, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.13 in
Chance of precipitation32%
Record high92° (1993)
Record low51° (1967)
Fri, 0480° / 65°0.09
80 °
Union, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.09 in
Chance of precipitation30%
Record high93° (2023)
Record low53° (1997)
Sat, 0579° / 64°0.06
79 °
Union, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.06 in
Chance of precipitation20%
Record high96° (2023)
Record low54° (1997)
Sun, 0679° / 64°0.18
79 °
Union, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.18 in
Chance of precipitation32%
Record high96° (2023)
Record low52° (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 Union, 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 Union, 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.