Monthly outlook for Washington, NJ: average high 83.3°, average low 67.7°. That is 1.1° above the climate normal for August. Precipitation is expected on 5 days (about 3.1 inches), against a normal of 6 days and 2.3 inches. The warmest day looks like 11 August (93.3°), the coolest 23 August (59.5°).
83.3°/67.7°
Average high / low
+1.1°
Above normal
5 / 6
Wet days / normal
3.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
85.6°
82.2°
+1.9°
18 August – 27 August
79.3°
80.3°
-0.6°
28 August – 6 September
at normal
79.1°
—
August records over 66 years
99.5°2 August 2006All-time high
49.6°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Brookdale (12 mi).
Sun, 0991° / 73°0
91 °
Washington, Sunday, 9 August
Clear. High 91°, low 73°.
Pressure29.94 inHg
Wind6.8 mph NW
Humidity40%
Visibility6.2 mi
Dew point63°
Mon, 1093° / 72°0.01
93 °
Washington, Monday, 10 August
Light rain. High 93°, low 72°.
Pressure29.97 inHg
Wind7.9 mph SW
Humidity40%
Visibility6.2 mi
Dew point61°
Tue, 1193° / 74°0.07
93 °
Washington, Tuesday, 11 August
Light rain. High 93°, low 74°.
Pressure29.88 inHg
Wind9 mph NW
Humidity33%
Visibility6.2 mi
Dew point55°
Wed, 1283° / 72°0.26
83 °
Washington, Wednesday, 12 August
Rain. High 83°, low 72°.
Pressure29.74 inHg
Wind6.6 mph NW
Humidity62%
Visibility6.2 mi
Dew point65°
Thu, 1389° / 67°0
89 °
Washington, Thursday, 13 August
Overcast. High 89°, low 67°.
Pressure29.71 inHg
Wind14.8 mph NW
Humidity37%
Visibility—
Dew point57°
Fri, 1479° / 65°0
79 °
Washington, Friday, 14 August
Mostly clear. High 79°, low 65°.
Pressure29.91 inHg
Wind10.6 mph NW
Humidity30%
Visibility—
Dew point42°
Sat, 1578° / 60°0
78 °
Washington, Saturday, 15 August
Clear. High 78°, low 60°.
Pressure30.12 inHg
Wind11.8 mph NW
Humidity30%
Visibility—
Dew point42°
Sun, 1680° / 62°0
80 °
Washington, Sunday, 16 August
Partly cloudy. High 80°, low 62°.
Pressure30.27 inHg
Wind8.1 mph NW
Humidity28%
Visibility—
Dew point42°
Mon, 1784° / 65°0
84 °
Washington, Monday, 17 August
Overcast. High 84°, low 65°.
Pressure30.15 inHg
Wind10.6 mph S
Humidity27%
Visibility—
Dew point45°
Tue, 1881° / 70°0.15
81 °
Washington, Tuesday, 18 August
Light rain. High 81°, low 70°.
Pressure29.91 inHg
Wind7.4 mph SW
Humidity58%
Visibility—
Dew point64°
Wed, 1985° / 70°0.01
85 °
Washington, Wednesday, 19 August
Light rain. High 85°, low 70°.
Pressure29.85 inHg
Wind10.4 mph NW
Humidity42%
Visibility—
Dew point57°
Thu, 2083° / 66°0
83 °
Washington, Thursday, 20 August
Overcast. High 83°, low 66°.
Pressure30.00 inHg
Wind7 mph N
Humidity52%
Visibility—
Dew point53°
Fri, 2172° / 68°1.57
72 °
Washington, Friday, 21 August
Heavy rain. High 72°, low 68°.
Pressure29.97 inHg
Wind10.2 mph SW
Humidity66%
Visibility—
Dew point60°
Sat, 2282° / 69°1
82 °
Washington, Saturday, 22 August
Heavy rain. High 82°, low 69°.
Pressure29.80 inHg
Wind8.5 mph NW
Humidity85%
Visibility—
Dew point66°
Sun, 2373° / 59°0
73 °
Washington, Sunday, 23 August
Clear. High 73°, low 59°.
Pressure29.97 inHg
Wind16.4 mph NW
Humidity42%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2480° / 64°0.07
80 °
Washington, Monday, 24 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation25%
Record high92° (1998)
Record low53° (1971)
Tue, 2581° / 64°0.07
81 °
Washington, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.07 in
Chance of precipitation22%
Record high95° (1968)
Record low53° (1971)
Wed, 2681° / 64°0.09
81 °
Washington, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation25%
Record high91° (1993)
Record low55° (1963)
Thu, 2782° / 66°0.16
82 °
Washington, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.16 in
Chance of precipitation33%
Record high92° (2020)
Record low56° (1969)
Fri, 2881° / 66°0.22
81 °
Washington, Friday, 28 August
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.22 in
Chance of precipitation40%
Record high93° (1973)
Record low56° (1968)
Sat, 2980° / 66°0.15
80 °
Washington, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.15 in
Chance of precipitation35%
Record high92° (2018)
Record low50° (1982)
Sun, 3080° / 65°0.06
80 °
Washington, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.06 in
Chance of precipitation28%
Record high93° (1973)
Record low50° (1986)
Mon, 3180° / 64°0.06
80 °
Washington, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.06 in
Chance of precipitation17%
Record high93° (2010)
Record low50° (1965)
Tue, 0178° / 64°0.13
78 °
Washington, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.13 in
Chance of precipitation32%
Record high93° (2010)
Record low53° (2017)
Wed, 0278° / 63°0.18
78 °
Washington, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.18 in
Chance of precipitation38%
Record high95° (1980)
Record low53° (2017)
Thu, 0379° / 63°0.13
79 °
Washington, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.13 in
Chance of precipitation38%
Record high91° (1993)
Record low50° (1967)
Fri, 0479° / 64°0.11
79 °
Washington, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high91° (2023)
Record low53° (1975)
Sat, 0578° / 63°0.06
78 °
Washington, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.06 in
Chance of precipitation23%
Record high93° (2023)
Record low53° (1997)
Sun, 0678° / 63°0.2
78 °
Washington, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.2 in
Chance of precipitation30%
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 Washington, 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 Washington, 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.