Monthly outlook for Carroll Knolls, MD: average high 89.6°, average low 71.2°. That is 3.3° above the climate normal for August. Precipitation is expected on 7 days (about 1.1 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 16 August (103.5°), the coolest 15 August (66°).
89.6°/71.2°
Average high / low
+3.3°
Above normal
7 / 6
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
88.9°
84.3°
+2.5°
19 August – 28 August
90.7°
83°
+4.3°
29 August – 7 September
at normal
81.9°
—
August records over 66 years
100.2°17 August 1988All-time high
50°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Forest Glen (0 mi).
Mon, 1094° / 73°0.01
94 °
Carroll Knolls, Monday, 10 August
Light rain. High 94°, low 73°.
Pressure29.97 inHg
Wind4 mph W
Humidity33%
Visibility6.2 mi
Dew point60°
Tue, 1192° / 70°0.12
92 °
Carroll Knolls, Tuesday, 11 August
Light rain. High 92°, low 70°.
Pressure29.94 inHg
Wind10.2 mph NW
Humidity50%
Visibility6.2 mi
Dew point65°
Wed, 1289° / 73°0.04
89 °
Carroll Knolls, Wednesday, 12 August
Light rain. High 89°, low 73°.
Pressure29.80 inHg
Wind6 mph W
Humidity50%
Visibility6.2 mi
Dew point64°
Thu, 1390° / 71°0
90 °
Carroll Knolls, Thursday, 13 August
Clear. High 90°, low 71°.
Pressure29.91 inHg
Wind8.9 mph NW
Humidity38%
Visibility6.2 mi
Dew point58°
Fri, 1473° / 69°0.04
73 °
Carroll Knolls, Friday, 14 August
Light rain. High 73°, low 69°.
Pressure30.09 inHg
Wind4.9 mph NW
Humidity68%
Visibility—
Dew point61°
Sat, 1580° / 66°0
80 °
Carroll Knolls, Saturday, 15 August
Overcast. High 80°, low 66°.
Pressure30.18 inHg
Wind5 mph S
Humidity59%
Visibility—
Dew point62°
Sun, 16103° / 71°0.16
103 °
Carroll Knolls, Sunday, 16 August
Light rain. High 103°, low 71°.
Pressure29.85 inHg
Wind10.4 mph SW
Humidity46%
Visibility—
Dew point67°
Mon, 1786° / 71°0
86 °
Carroll Knolls, Monday, 17 August
Partly cloudy. High 86°, low 71°.
Pressure29.97 inHg
Wind11 mph N
Humidity33%
Visibility—
Dew point51°
Tue, 1890° / 71°0.01
90 °
Carroll Knolls, Tuesday, 18 August
Light rain. High 90°, low 71°.
Pressure30.03 inHg
Wind10.6 mph S
Humidity34%
Visibility—
Dew point55°
Wed, 1996° / 71°0.09
96 °
Carroll Knolls, Wednesday, 19 August
Light rain. High 96°, low 71°.
Pressure29.91 inHg
Wind11.1 mph NW
Humidity32%
Visibility—
Dew point58°
Thu, 2093° / 73°0
93 °
Carroll Knolls, Thursday, 20 August
Mostly clear. High 93°, low 73°.
Pressure29.94 inHg
Wind7.3 mph S
Humidity30%
Visibility—
Dew point53°
Fri, 2192° / 72°0.11
92 °
Carroll Knolls, Friday, 21 August
Light rain. High 92°, low 72°.
Pressure29.80 inHg
Wind9.4 mph SW
Humidity46%
Visibility—
Dew point65°
Sat, 2285° / 72°0.25
85 °
Carroll Knolls, Saturday, 22 August
Light rain. High 85°, low 72°.
Pressure29.85 inHg
Wind8.3 mph NE
Humidity55%
Visibility—
Dew point66°
Sun, 2384° / 72°0.25
84 °
Carroll Knolls, Sunday, 23 August
Light rain. High 84°, low 72°.
Pressure30.00 inHg
Wind5.6 mph E
Humidity80%
Visibility—
Dew point71°
Mon, 2494° / 72°0.05
94 °
Carroll Knolls, Monday, 24 August
Light rain. High 94°, low 72°.
Pressure29.97 inHg
Wind6 mph W
Humidity40%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2584° / 66°0.07
84 °
Carroll Knolls, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.07 in
Chance of precipitation23%
Record high96° (1968)
Record low57° (1971)
Wed, 2684° / 67°0.06
84 °
Carroll Knolls, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.06 in
Chance of precipitation23%
Record high94° (1975)
Record low56° (1963)
Thu, 2784° / 67°0.14
84 °
Carroll Knolls, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.14 in
Chance of precipitation38%
Record high95° (1987)
Record low58° (2025)
Fri, 2884° / 68°0.17
84 °
Carroll Knolls, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.17 in
Chance of precipitation45%
Record high97° (1973)
Record low58° (1986)
Sat, 2983° / 67°0.12
83 °
Carroll Knolls, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.12 in
Chance of precipitation30%
Record high96° (1973)
Record low51° (1986)
Sun, 3083° / 66°0.06
83 °
Carroll Knolls, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.06 in
Chance of precipitation25%
Record high94° (1973)
Record low50° (1986)
Mon, 3183° / 67°0.07
83 °
Carroll Knolls, Monday, 31 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.07 in
Chance of precipitation25%
Record high96° (1973)
Record low53° (1986)
Tue, 0181° / 65°0.14
81 °
Carroll Knolls, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.14 in
Chance of precipitation27%
Record high95° (1973)
Record low55° (1967)
Wed, 0282° / 65°0.12
82 °
Carroll Knolls, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.12 in
Chance of precipitation40%
Record high95° (1980)
Record low54° (1967)
Thu, 0382° / 65°0.11
82 °
Carroll Knolls, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.11 in
Chance of precipitation32%
Record high96° (2023)
Record low51° (1967)
Fri, 0482° / 66°0.09
82 °
Carroll Knolls, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.09 in
Chance of precipitation33%
Record high97° (2023)
Record low54° (1997)
Sat, 0581° / 65°0.13
81 °
Carroll Knolls, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.13 in
Chance of precipitation30%
Record high99° (2023)
Record low53° (1997)
Sun, 0681° / 65°0.24
81 °
Carroll Knolls, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.24 in
Chance of precipitation30%
Record high98° (2023)
Record low54° (2000)
Mon, 0781° / 64°0.07
81 °
Carroll Knolls, Monday, 7 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.07 in
Chance of precipitation25%
Record high93° (1998)
Record low51° (1988)
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 Carroll Knolls, MD 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 Carroll Knolls, MD 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.