Monthly outlook for Dayton, MD: average high 82.3°, average low 65.5°. That is 0.6° below the climate normal for August. Precipitation is expected on 8 days (about 1.6 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 10 August (90.7°), the coolest 15 August (56.4°).
82.3°/65.5°
Average high / low
−0.6°
Below normal
8 / 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
84.5°
84.2°
+0.2°
18 August – 27 August
78.5°
82.7°
-2.3°
28 August – 6 September
at normal
81.9°
—
August records over 66 years
100°17 August 1988All-time high
51.6°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Columbia (7 mi).
Sun, 0989° / 70°0
89 °
Dayton, Sunday, 9 August
Clear. High 89°, low 70°.
Pressure30.03 inHg
Wind8.8 mph W
Humidity49%
Visibility6.2 mi
Dew point66°
Mon, 1091° / 69°0.4
91 °
Dayton, Monday, 10 August
Heavy rain. High 91°, low 69°.
Pressure30.03 inHg
Wind8.9 mph NW
Humidity50%
Visibility6.2 mi
Dew point66°
Tue, 1188° / 69°0.14
88 °
Dayton, Tuesday, 11 August
Light rain. High 88°, low 69°.
Pressure29.97 inHg
Wind9.6 mph W
Humidity59%
Visibility6.2 mi
Dew point66°
Wed, 1286° / 69°0.07
86 °
Dayton, Wednesday, 12 August
Light rain. High 86°, low 69°.
Pressure29.83 inHg
Wind8 mph W
Humidity68%
Visibility6.2 mi
Dew point67°
Thu, 1386° / 69°0.05
86 °
Dayton, Thursday, 13 August
Light rain. High 86°, low 69°.
Pressure29.80 inHg
Wind12.1 mph W
Humidity47%
Visibility—
Dew point62°
Fri, 1475° / 60°0.24
75 °
Dayton, Friday, 14 August
Rain. High 75°, low 60°.
Pressure30.00 inHg
Wind8.1 mph N
Humidity57%
Visibility—
Dew point54°
Sat, 1577° / 56°0
77 °
Dayton, Saturday, 15 August
Clear. High 77°, low 56°.
Pressure30.21 inHg
Wind8.4 mph N
Humidity38%
Visibility—
Dew point46°
Sun, 1677° / 59°0
77 °
Dayton, Sunday, 16 August
Clear. High 77°, low 59°.
Pressure30.30 inHg
Wind6.4 mph N
Humidity33%
Visibility—
Dew point44°
Mon, 1786° / 63°0
86 °
Dayton, Monday, 17 August
Mostly clear. High 86°, low 63°.
Pressure30.12 inHg
Wind8.3 mph SE
Humidity46%
Visibility—
Dew point58°
Tue, 1872° / 69°0.21
72 °
Dayton, Tuesday, 18 August
Light rain. High 72°, low 69°.
Pressure29.97 inHg
Wind8.6 mph S
Humidity88%
Visibility—
Dew point68°
Wed, 1985° / 68°0.03
85 °
Dayton, Wednesday, 19 August
Light rain. High 85°, low 68°.
Pressure29.88 inHg
Wind9.2 mph NE
Humidity43%
Visibility—
Dew point57°
Thu, 2083° / 63°0
83 °
Dayton, Thursday, 20 August
Overcast. High 83°, low 63°.
Pressure29.97 inHg
Wind7.7 mph E
Humidity43%
Visibility—
Dew point55°
Fri, 2172° / 67°0.41
72 °
Dayton, Friday, 21 August
Light rain. High 72°, low 67°.
Pressure29.88 inHg
Wind9.6 mph S
Humidity96%
Visibility—
Dew point70°
Sat, 2285° / 66°0
85 °
Dayton, Saturday, 22 August
Mostly clear. High 85°, low 66°.
Pressure29.77 inHg
Wind9.2 mph W
Humidity43%
Visibility—
Dew point58°
Sun, 2375° / 60°0
75 °
Dayton, Sunday, 23 August
Partly cloudy. High 75°, low 60°.
Pressure30.06 inHg
Wind15.6 mph NW
Humidity31%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2483° / 66°0.08
83 °
Dayton, Monday, 24 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.08 in
Chance of precipitation18%
Record high95° (1995)
Record low56° (1994)
Tue, 2583° / 67°0.06
83 °
Dayton, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.06 in
Chance of precipitation22%
Record high96° (1968)
Record low57° (1971)
Wed, 2684° / 67°0.06
84 °
Dayton, 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 low58° (1963)
Thu, 2784° / 68°0.15
84 °
Dayton, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.15 in
Chance of precipitation42%
Record high95° (1987)
Record low58° (2025)
Fri, 2884° / 68°0.17
84 °
Dayton, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.17 in
Chance of precipitation47%
Record high97° (1973)
Record low58° (2025)
Sat, 2983° / 68°0.13
83 °
Dayton, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low68°
Average precipitation0.13 in
Chance of precipitation32%
Record high95° (1973)
Record low52° (1982)
Sun, 3083° / 67°0.08
83 °
Dayton, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.08 in
Chance of precipitation25%
Record high94° (1973)
Record low52° (1986)
Mon, 3182° / 67°0.08
82 °
Dayton, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.08 in
Chance of precipitation27%
Record high95° (1973)
Record low55° (1986)
Tue, 0181° / 66°0.15
81 °
Dayton, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.15 in
Chance of precipitation28%
Record high95° (1973)
Record low55° (1967)
Wed, 0281° / 65°0.13
81 °
Dayton, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.13 in
Chance of precipitation42%
Record high95° (1980)
Record low55° (1967)
Thu, 0382° / 66°0.11
82 °
Dayton, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.11 in
Chance of precipitation30%
Record high95° (2023)
Record low52° (1967)
Fri, 0482° / 66°0.09
82 °
Dayton, 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° / 66°0.14
81 °
Dayton, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.14 in
Chance of precipitation32%
Record high98° (2023)
Record low54° (1997)
Sun, 0680° / 65°0.25
80 °
Dayton, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.25 in
Chance of precipitation33%
Record high98° (2023)
Record low54° (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 Dayton, 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 Dayton, 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.