Monthly outlook for Garretts Mill, MD: average high 88.4°, average low 64.2°. That is 2.9° above the climate normal for August. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 21 August (100.7°), the coolest 16 August (51.7°).
88.4°/64.2°
Average high / low
+2.9°
Above normal
5 / 5
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
84.1°
83.9°
+0.1°
19 August – 28 August
95.6°
82.7°
+7.1°
29 August – 7 September
at normal
81.5°
—
August records over 66 years
99.7°17 August 1988All-time high
48.9°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Rohrersville (6 mi).
Mon, 1089° / 70°0.01
89 °
Garretts Mill, Monday, 10 August
Light rain. High 89°, low 70°.
Pressure30.00 inHg
Wind8.8 mph W
Humidity44%
Visibility6.2 mi
Dew point65°
Tue, 1191° / 67°0.26
91 °
Garretts Mill, Tuesday, 11 August
Rain. High 91°, low 67°.
Pressure29.94 inHg
Wind12 mph NW
Humidity49%
Visibility6.2 mi
Dew point64°
Wed, 1290° / 64°0.19
90 °
Garretts Mill, Wednesday, 12 August
Rain. High 90°, low 64°.
Pressure29.80 inHg
Wind10 mph W
Humidity56%
Visibility6.2 mi
Dew point65°
Thu, 1384° / 64°0.02
84 °
Garretts Mill, Thursday, 13 August
Light rain. High 84°, low 64°.
Pressure29.83 inHg
Wind17.9 mph NW
Humidity33%
Visibility—
Dew point50°
Fri, 1480° / 57°0
80 °
Garretts Mill, Friday, 14 August
Overcast. High 80°, low 57°.
Pressure30.06 inHg
Wind9.6 mph NW
Humidity35%
Visibility—
Dew point45°
Sat, 1578° / 54°0
78 °
Garretts Mill, Saturday, 15 August
Overcast. High 78°, low 54°.
Pressure30.18 inHg
Wind12.1 mph NW
Humidity29%
Visibility—
Dew point40°
Sun, 1674° / 52°0
74 °
Garretts Mill, Sunday, 16 August
Overcast. High 74°, low 52°.
Pressure30.15 inHg
Wind4.5 mph SW
Humidity38%
Visibility—
Dew point45°
Mon, 1783° / 64°0
83 °
Garretts Mill, Monday, 17 August
Partly cloudy. High 83°, low 64°.
Pressure29.97 inHg
Wind7.7 mph E
Humidity42%
Visibility—
Dew point55°
Tue, 1885° / 63°0.04
85 °
Garretts Mill, Tuesday, 18 August
Light rain. High 85°, low 63°.
Pressure30.00 inHg
Wind8 mph S
Humidity46%
Visibility—
Dew point57°
Wed, 1987° / 62°0
87 °
Garretts Mill, Wednesday, 19 August
Mostly clear. High 87°, low 62°.
Pressure30.06 inHg
Wind7.9 mph S
Humidity36%
Visibility—
Dew point54°
Thu, 2092° / 63°0
92 °
Garretts Mill, Thursday, 20 August
Mostly clear. High 92°, low 63°.
Pressure29.97 inHg
Wind10.7 mph S
Humidity36%
Visibility—
Dew point57°
Fri, 21101° / 66°0.56
101 °
Garretts Mill, Friday, 21 August
Rain. High 101°, low 66°.
Pressure29.80 inHg
Wind9.3 mph SW
Humidity34%
Visibility—
Dew point62°
Sat, 2297° / 73°0.02
97 °
Garretts Mill, Saturday, 22 August
Light rain. High 97°, low 73°.
Pressure29.88 inHg
Wind7.4 mph NE
Humidity37%
Visibility—
Dew point62°
Sun, 23100° / 69°0.05
100 °
Garretts Mill, Sunday, 23 August
Light rain. High 100°, low 69°.
Pressure29.91 inHg
Wind6.7 mph SE
Humidity37%
Visibility—
Dew point63°
Mon, 2496° / 69°0.48
96 °
Garretts Mill, Monday, 24 August
Rain. High 96°, low 69°.
Pressure29.94 inHg
Wind14.1 mph N
Humidity41%
Visibility—
Dew point66°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 65°0.05
83 °
Garretts Mill, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.05 in
Chance of precipitation18%
Record high96° (2007)
Record low54° (1971)
Wed, 2684° / 65°0.05
84 °
Garretts Mill, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.05 in
Chance of precipitation23%
Record high94° (1975)
Record low55° (1963)
Thu, 2784° / 66°0.13
84 °
Garretts Mill, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.13 in
Chance of precipitation30%
Record high94° (2020)
Record low55° (1969)
Fri, 2884° / 66°0.13
84 °
Garretts Mill, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.13 in
Chance of precipitation33%
Record high95° (1993)
Record low55° (2025)
Sat, 2983° / 66°0.07
83 °
Garretts Mill, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.07 in
Chance of precipitation28%
Record high94° (1973)
Record low49° (1982)
Sun, 3083° / 65°0.06
83 °
Garretts Mill, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.06 in
Chance of precipitation27%
Record high94° (1991)
Record low49° (1986)
Mon, 3182° / 65°0.09
82 °
Garretts Mill, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation28%
Record high95° (1973)
Record low52° (1986)
Tue, 0181° / 64°0.1
81 °
Garretts Mill, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.1 in
Chance of precipitation33%
Record high95° (2010)
Record low52° (1967)
Wed, 0282° / 63°0.09
82 °
Garretts Mill, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.09 in
Chance of precipitation32%
Record high96° (2010)
Record low53° (1967)
Thu, 0382° / 64°0.06
82 °
Garretts Mill, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.06 in
Chance of precipitation23%
Record high95° (2010)
Record low49° (1967)
Fri, 0481° / 64°0.1
81 °
Garretts Mill, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.1 in
Chance of precipitation25%
Record high96° (2023)
Record low52° (1997)
Sat, 0581° / 64°0.11
81 °
Garretts Mill, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation28%
Record high95° (2023)
Record low52° (1997)
Sun, 0680° / 63°0.24
80 °
Garretts Mill, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.24 in
Chance of precipitation33%
Record high96° (2023)
Record low50° (2000)
Mon, 0780° / 62°0.07
80 °
Garretts Mill, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.07 in
Chance of precipitation22%
Record high93° (2016)
Record low50° (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 Garretts Mill, 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 Garretts Mill, 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.