Monthly outlook for Bonnie Brae, MD: average high 83.7°, average low 64.1°. That is 1.1° above the climate normal for August. Precipitation is expected on 2 days (about 0.7 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 22 August (90.1°), the coolest 16 August (55.8°).
83.7°/64.1°
Average high / low
+1.1°
Above normal
2 / 6
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
82.7°
82.4°
+0.2°
19 August – 28 August
85.3°
81.1°
+2.3°
29 August – 7 September
at normal
79.9°
—
August records over 66 years
97.2°15 August 1988All-time high
48°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Reisterstown (8 mi).
Mon, 1089° / 72°0
89 °
Bonnie Brae, Monday, 10 August
Mostly clear. High 89°, low 72°.
Pressure30.00 inHg
Wind9.2 mph W
Humidity41%
Visibility6.2 mi
Dew point64°
Tue, 1190° / 68°0.09
90 °
Bonnie Brae, Tuesday, 11 August
Light rain. High 90°, low 68°.
Pressure29.91 inHg
Wind9.2 mph NW
Humidity51%
Visibility6.2 mi
Dew point64°
Wed, 1285° / 69°0.03
85 °
Bonnie Brae, Wednesday, 12 August
Light rain. High 85°, low 69°.
Pressure29.85 inHg
Wind8.6 mph NW
Humidity62%
Visibility6.2 mi
Dew point65°
Thu, 1387° / 69°0
87 °
Bonnie Brae, Thursday, 13 August
Overcast. High 87°, low 69°.
Pressure29.85 inHg
Wind16.1 mph NW
Humidity27%
Visibility—
Dew point47°
Fri, 1470° / 58°0.04
70 °
Bonnie Brae, Friday, 14 August
Light rain. High 70°, low 58°.
Pressure30.09 inHg
Wind6.3 mph SW
Humidity83%
Visibility—
Dew point58°
Sat, 1578° / 56°0
78 °
Bonnie Brae, Saturday, 15 August
Overcast. High 78°, low 56°.
Pressure30.21 inHg
Wind11.6 mph N
Humidity34%
Visibility—
Dew point44°
Sun, 1674° / 56°0.02
74 °
Bonnie Brae, Sunday, 16 August
Light rain. High 74°, low 56°.
Pressure30.18 inHg
Wind7.2 mph SW
Humidity52%
Visibility—
Dew point49°
Mon, 1782° / 66°0
82 °
Bonnie Brae, Monday, 17 August
Overcast. High 82°, low 66°.
Pressure29.88 inHg
Wind8.8 mph S
Humidity50%
Visibility—
Dew point59°
Tue, 1885° / 61°0
85 °
Bonnie Brae, Tuesday, 18 August
Mostly clear. High 85°, low 61°.
Pressure29.97 inHg
Wind7.4 mph SE
Humidity31%
Visibility—
Dew point49°
Wed, 1983° / 66°0.49
83 °
Bonnie Brae, Wednesday, 19 August
Rain. High 83°, low 66°.
Pressure29.83 inHg
Wind13.2 mph S
Humidity59%
Visibility—
Dew point65°
Thu, 2085° / 64°0
85 °
Bonnie Brae, Thursday, 20 August
Partly cloudy. High 85°, low 64°.
Pressure29.74 inHg
Wind11.9 mph NW
Humidity40%
Visibility—
Dew point56°
Fri, 2184° / 60°0
84 °
Bonnie Brae, Friday, 21 August
Partly cloudy. High 84°, low 60°.
Pressure29.88 inHg
Wind8.1 mph SW
Humidity36%
Visibility—
Dew point50°
Sat, 2290° / 63°0
90 °
Bonnie Brae, Saturday, 22 August
Clear. High 90°, low 63°.
Pressure29.91 inHg
Wind12.9 mph S
Humidity35%
Visibility—
Dew point55°
Sun, 2387° / 69°0.01
87 °
Bonnie Brae, Sunday, 23 August
Light rain. High 87°, low 69°.
Pressure29.91 inHg
Wind15.8 mph W
Humidity33%
Visibility—
Dew point53°
Mon, 2483° / 58°0
83 °
Bonnie Brae, Monday, 24 August
Clear. High 83°, low 58°.
Pressure30.15 inHg
Wind7.4 mph N
Humidity25%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 65°0.06
82 °
Bonnie Brae, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.06 in
Chance of precipitation20%
Record high94° (1968)
Record low55° (1987)
Wed, 2682° / 65°0.06
82 °
Bonnie Brae, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.06 in
Chance of precipitation25%
Record high93° (1975)
Record low55° (1963)
Thu, 2782° / 66°0.15
82 °
Bonnie Brae, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.15 in
Chance of precipitation37%
Record high91° (2020)
Record low55° (1969)
Fri, 2882° / 66°0.17
82 °
Bonnie Brae, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.17 in
Chance of precipitation45%
Record high95° (1973)
Record low55° (1968)
Sat, 2981° / 66°0.1
81 °
Bonnie Brae, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.1 in
Chance of precipitation30%
Record high94° (1973)
Record low49° (1982)
Sun, 3082° / 65°0.07
82 °
Bonnie Brae, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation25%
Record high93° (1973)
Record low48° (1986)
Mon, 3181° / 65°0.07
81 °
Bonnie Brae, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.07 in
Chance of precipitation28%
Record high94° (1973)
Record low52° (1976)
Tue, 0179° / 64°0.13
79 °
Bonnie Brae, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.13 in
Chance of precipitation28%
Record high94° (1973)
Record low52° (1967)
Wed, 0280° / 63°0.12
80 °
Bonnie Brae, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.12 in
Chance of precipitation40%
Record high94° (1980)
Record low53° (1967)
Thu, 0380° / 64°0.11
80 °
Bonnie Brae, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.11 in
Chance of precipitation28%
Record high93° (2023)
Record low49° (1967)
Fri, 0480° / 64°0.11
80 °
Bonnie Brae, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.11 in
Chance of precipitation35%
Record high96° (2023)
Record low52° (1997)
Sat, 0579° / 63°0.14
79 °
Bonnie Brae, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.14 in
Chance of precipitation30%
Record high95° (2023)
Record low52° (1997)
Sun, 0679° / 63°0.25
79 °
Bonnie Brae, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.25 in
Chance of precipitation32%
Record high95° (2023)
Record low51° (2000)
Mon, 0779° / 62°0.09
79 °
Bonnie Brae, Monday, 7 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.09 in
Chance of precipitation27%
Record high90° (1998)
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 Bonnie Brae, 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 Bonnie Brae, 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.