Monthly outlook for Frederick, MD: average high 80.3°, average low 61.6°. That is 2° below the climate normal for August. Precipitation is expected on 7 days (about 1.8 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 10 August (93°), the coolest 21 August (48.3°).
80.3°/61.6°
Average high / low
−2°
Below normal
7 / 6
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
83.9°
84.8°
-0.5°
18 August – 27 August
74.4°
83.2°
-4.9°
28 August – 6 September
at normal
82.4°
—
August records over 66 years
100.8°17 August 1988All-time high
48.7°29 August 1986All-time low
Sun, 0987° / 71°0
87 °
Frederick, Sunday, 9 August
Mostly clear. High 87°, low 71°.
Pressure30.03 inHg
Wind9.3 mph W
Humidity46%
Visibility6.2 mi
Dew point65°
Mon, 1093° / 70°0.71
93 °
Frederick, Monday, 10 August
Heavy rain. High 93°, low 70°.
Pressure30.03 inHg
Wind9.3 mph NW
Humidity50%
Visibility6.2 mi
Dew point66°
Tue, 1189° / 68°0.06
89 °
Frederick, Tuesday, 11 August
Light rain. High 89°, low 68°.
Pressure29.97 inHg
Wind10.4 mph W
Humidity53%
Visibility6.2 mi
Dew point65°
Wed, 1283° / 68°0.16
83 °
Frederick, Wednesday, 12 August
Light rain. High 83°, low 68°.
Pressure29.83 inHg
Wind9.1 mph W
Humidity68%
Visibility6.2 mi
Dew point68°
Thu, 1387° / 69°0.02
87 °
Frederick, Thursday, 13 August
Light rain. High 87°, low 69°.
Pressure29.83 inHg
Wind13 mph W
Humidity45%
Visibility—
Dew point61°
Fri, 1480° / 62°0.19
80 °
Frederick, Friday, 14 August
Light rain. High 80°, low 62°.
Pressure29.97 inHg
Wind5.5 mph NW
Humidity47%
Visibility—
Dew point54°
Sat, 1579° / 55°0
79 °
Frederick, Saturday, 15 August
Clear. High 79°, low 55°.
Pressure30.21 inHg
Wind8.7 mph NE
Humidity37%
Visibility—
Dew point47°
Sun, 1683° / 56°0
83 °
Frederick, Sunday, 16 August
Overcast. High 83°, low 56°.
Pressure30.15 inHg
Wind7.7 mph W
Humidity38%
Visibility—
Dew point52°
Mon, 1770° / 58°0.16
70 °
Frederick, Monday, 17 August
Light rain. High 70°, low 58°.
Pressure30.21 inHg
Wind11.9 mph E
Humidity80%
Visibility—
Dew point55°
Tue, 1866° / 61°0.15
66 °
Frederick, Tuesday, 18 August
Light rain. High 66°, low 61°.
Pressure30.03 inHg
Wind9.1 mph E
Humidity97%
Visibility—
Dew point64°
Wed, 1985° / 65°0.01
85 °
Frederick, Wednesday, 19 August
Light rain. High 85°, low 65°.
Pressure29.85 inHg
Wind7 mph NW
Humidity55%
Visibility—
Dew point64°
Thu, 2071° / 57°0.33
71 °
Frederick, Thursday, 20 August
Rain. High 71°, low 57°.
Pressure29.94 inHg
Wind12.5 mph NE
Humidity96%
Visibility—
Dew point61°
Fri, 2173° / 48°0
73 °
Frederick, Friday, 21 August
Clear. High 73°, low 48°.
Pressure30.09 inHg
Wind10 mph N
Humidity36%
Visibility—
Dew point41°
Sat, 2273° / 52°0
73 °
Frederick, Saturday, 22 August
Mostly clear. High 73°, low 52°.
Pressure30.06 inHg
Wind6.2 mph W
Humidity37%
Visibility—
Dew point43°
Sun, 2379° / 54°0
79 °
Frederick, Sunday, 23 August
Clear. High 79°, low 54°.
Pressure30.09 inHg
Wind8.5 mph S
Humidity40%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2483° / 65°0.06
83 °
Frederick, Monday, 24 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.06 in
Chance of precipitation23%
Record high95° (1968)
Record low54° (1971)
Tue, 2584° / 65°0.05
84 °
Frederick, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.05 in
Chance of precipitation20%
Record high97° (2007)
Record low55° (1971)
Wed, 2684° / 65°0.05
84 °
Frederick, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.05 in
Chance of precipitation22%
Record high95° (1975)
Record low55° (1963)
Thu, 2784° / 66°0.14
84 °
Frederick, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.14 in
Chance of precipitation32%
Record high94° (1993)
Record low54° (2025)
Fri, 2885° / 66°0.13
85 °
Frederick, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0.13 in
Chance of precipitation37%
Record high96° (1993)
Record low54° (2025)
Sat, 2984° / 66°0.08
84 °
Frederick, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.08 in
Chance of precipitation32%
Record high96° (1973)
Record low49° (1986)
Sun, 3084° / 65°0.05
84 °
Frederick, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.05 in
Chance of precipitation23%
Record high95° (1991)
Record low51° (1986)
Mon, 3183° / 65°0.1
83 °
Frederick, Monday, 31 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.1 in
Chance of precipitation30%
Record high97° (1973)
Record low52° (1976)
Tue, 0182° / 64°0.11
82 °
Frederick, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.11 in
Chance of precipitation33%
Record high97° (1973)
Record low53° (1967)
Wed, 0282° / 64°0.11
82 °
Frederick, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.11 in
Chance of precipitation35%
Record high96° (2010)
Record low53° (1967)
Thu, 0382° / 64°0.08
82 °
Frederick, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.08 in
Chance of precipitation27%
Record high94° (2010)
Record low49° (1967)
Fri, 0482° / 65°0.09
82 °
Frederick, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation27%
Record high97° (2023)
Record low53° (2024)
Sat, 0581° / 64°0.11
81 °
Frederick, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation27%
Record high97° (2023)
Record low51° (1997)
Sun, 0681° / 63°0.25
81 °
Frederick, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.25 in
Chance of precipitation33%
Record high97° (2023)
Record low51° (2000)
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 Frederick, 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 Frederick, 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.