Monthly outlook for Northbrook, PA: average high 79°, average low 65°. That is 2.1° below the climate normal for August. Precipitation is expected on 6 days (about 1.6 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 9 August (86.8°), the coolest 15 August (56.3°).
79°/65°
Average high / low
−2.1°
Below normal
6 / 6
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
81.1°
83.5°
-1.3°
18 August – 27 August
75.5°
82°
-3.6°
28 August – 6 September
at normal
81.1°
—
August records over 66 years
97.2°9 August 2001All-time high
50.5°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Elsmere (13 mi).
Sun, 0987° / 70°0
87 °
Northbrook, Sunday, 9 August
Overcast. High 87°, low 70°.
Pressure30.00 inHg
Wind8.2 mph W
Humidity58%
Visibility6.2 mi
Dew point69°
Mon, 1086° / 71°0.07
86 °
Northbrook, Monday, 10 August
Rain. High 86°, low 71°.
Pressure30.00 inHg
Wind8.6 mph W
Humidity57%
Visibility6.2 mi
Dew point68°
Tue, 1185° / 70°0.11
85 °
Northbrook, Tuesday, 11 August
Rain. High 85°, low 70°.
Pressure29.91 inHg
Wind8 mph W
Humidity67%
Visibility6.2 mi
Dew point70°
Wed, 1279° / 70°0.67
79 °
Northbrook, Wednesday, 12 August
Heavy rain. High 79°, low 70°.
Pressure29.80 inHg
Wind9.4 mph W
Humidity77%
Visibility6.2 mi
Dew point68°
Thu, 1384° / 68°0
84 °
Northbrook, Thursday, 13 August
Partly cloudy. High 84°, low 68°.
Pressure29.80 inHg
Wind13 mph NW
Humidity55%
Visibility—
Dew point64°
Fri, 1475° / 63°0.01
75 °
Northbrook, Friday, 14 August
Light rain. High 75°, low 63°.
Pressure29.97 inHg
Wind9.1 mph W
Humidity45%
Visibility—
Dew point50°
Sat, 1574° / 56°0
74 °
Northbrook, Saturday, 15 August
Clear. High 74°, low 56°.
Pressure30.18 inHg
Wind10.2 mph N
Humidity41%
Visibility—
Dew point47°
Sun, 1678° / 57°0
78 °
Northbrook, Sunday, 16 August
Clear. High 78°, low 57°.
Pressure30.27 inHg
Wind5.9 mph NW
Humidity41%
Visibility—
Dew point50°
Mon, 1779° / 61°0
79 °
Northbrook, Monday, 17 August
Overcast. High 79°, low 61°.
Pressure30.15 inHg
Wind10.9 mph S
Humidity55%
Visibility—
Dew point60°
Tue, 1876° / 68°0.19
76 °
Northbrook, Tuesday, 18 August
Light rain. High 76°, low 68°.
Pressure29.97 inHg
Wind9.2 mph S
Humidity88%
Visibility—
Dew point68°
Wed, 1982° / 67°0.02
82 °
Northbrook, Wednesday, 19 August
Light rain. High 82°, low 67°.
Pressure29.88 inHg
Wind9.7 mph N
Humidity48%
Visibility—
Dew point59°
Thu, 2069° / 62°0
69 °
Northbrook, Thursday, 20 August
Overcast. High 69°, low 62°.
Pressure30.00 inHg
Wind5.4 mph N
Humidity67%
Visibility—
Dew point57°
Fri, 2171° / 63°0.4
71 °
Northbrook, Friday, 21 August
Rain. High 71°, low 63°.
Pressure29.88 inHg
Wind8.4 mph S
Humidity97%
Visibility—
Dew point70°
Sat, 2282° / 67°0.01
82 °
Northbrook, Saturday, 22 August
Light rain. High 82°, low 67°.
Pressure29.77 inHg
Wind8.9 mph NW
Humidity58%
Visibility—
Dew point63°
Sun, 2372° / 58°0
72 °
Northbrook, Sunday, 23 August
Clear. High 72°, low 58°.
Pressure30.03 inHg
Wind14.6 mph NW
Humidity38%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 66°0.07
82 °
Northbrook, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.07 in
Chance of precipitation23%
Record high92° (1998)
Record low56° (1971)
Tue, 2583° / 66°0.06
83 °
Northbrook, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.06 in
Chance of precipitation12%
Record high94° (1968)
Record low57° (1987)
Wed, 2683° / 67°0.06
83 °
Northbrook, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.06 in
Chance of precipitation22%
Record high92° (1975)
Record low57° (1963)
Thu, 2783° / 68°0.18
83 °
Northbrook, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low68°
Average precipitation0.18 in
Chance of precipitation35%
Record high92° (2020)
Record low58° (1963)
Fri, 2883° / 68°0.23
83 °
Northbrook, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low68°
Average precipitation0.23 in
Chance of precipitation47%
Record high97° (2024)
Record low58° (1968)
Sat, 2982° / 68°0.12
82 °
Northbrook, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low68°
Average precipitation0.12 in
Chance of precipitation23%
Record high94° (1973)
Record low51° (1982)
Sun, 3082° / 67°0.07
82 °
Northbrook, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.07 in
Chance of precipitation27%
Record high94° (1973)
Record low51° (1986)
Mon, 3182° / 67°0.08
82 °
Northbrook, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.08 in
Chance of precipitation18%
Record high95° (2010)
Record low54° (1976)
Tue, 0181° / 66°0.14
81 °
Northbrook, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.14 in
Chance of precipitation30%
Record high93° (2010)
Record low56° (1967)
Wed, 0280° / 65°0.1
80 °
Northbrook, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.1 in
Chance of precipitation35%
Record high94° (1980)
Record low55° (1967)
Thu, 0381° / 65°0.13
81 °
Northbrook, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.13 in
Chance of precipitation35%
Record high92° (2015)
Record low51° (1967)
Fri, 0481° / 66°0.09
81 °
Northbrook, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.09 in
Chance of precipitation25%
Record high95° (2023)
Record low53° (2024)
Sat, 0580° / 65°0.11
80 °
Northbrook, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.11 in
Chance of precipitation28%
Record high96° (2023)
Record low54° (1997)
Sun, 0680° / 65°0.22
80 °
Northbrook, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.22 in
Chance of precipitation28%
Record high96° (2023)
Record low54° (1962)
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 Northbrook, PA 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 Northbrook, PA 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.