Monthly outlook for Arnold Heights, MD: average high 85°, average low 68.2°. That is 0.6° above the climate normal for August. Precipitation is expected on 6 days (about 0.8 inches), against a normal of 6 days and 2.1 inches. The warmest day looks like 10 August (94.9°), the coolest 15 August (61°).
85°/68.2°
Average high / low
+0.6°
Above normal
6 / 6
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
84.9°
84.7°
+0.1°
19 August – 28 August
85.3°
83.3°
+1.1°
29 August – 7 September
at normal
82.2°
—
August records over 66 years
100.6°15 August 1988All-time high
50.5°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Coral Hills (1 mi).
Mon, 1095° / 73°0.13
95 °
Arnold Heights, Monday, 10 August
Rain. High 95°, low 73°.
Pressure30.00 inHg
Wind3 mph SW
Humidity36%
Visibility6.2 mi
Dew point63°
Tue, 1191° / 71°0.24
91 °
Arnold Heights, Tuesday, 11 August
Rain. High 91°, low 71°.
Pressure29.94 inHg
Wind7.4 mph NW
Humidity51%
Visibility6.2 mi
Dew point67°
Wed, 1292° / 73°0.08
92 °
Arnold Heights, Wednesday, 12 August
Light rain. High 92°, low 73°.
Pressure29.80 inHg
Wind6.3 mph W
Humidity62%
Visibility6.2 mi
Dew point66°
Thu, 1386° / 73°0.02
86 °
Arnold Heights, Thursday, 13 August
Light rain. High 86°, low 73°.
Pressure29.83 inHg
Wind13.4 mph NW
Humidity36%
Visibility—
Dew point54°
Fri, 1474° / 62°0
74 °
Arnold Heights, Friday, 14 August
Overcast. High 74°, low 62°.
Pressure30.09 inHg
Wind8 mph N
Humidity40%
Visibility—
Dew point47°
Sat, 1583° / 61°0
83 °
Arnold Heights, Saturday, 15 August
Clear. High 83°, low 61°.
Pressure30.15 inHg
Wind8.5 mph N
Humidity30%
Visibility—
Dew point46°
Sun, 1685° / 64°0
85 °
Arnold Heights, Sunday, 16 August
Mostly clear. High 85°, low 64°.
Pressure30.18 inHg
Wind6.3 mph SE
Humidity33%
Visibility—
Dew point50°
Mon, 1779° / 68°0.02
79 °
Arnold Heights, Monday, 17 August
Light rain. High 79°, low 68°.
Pressure30.09 inHg
Wind9.8 mph S
Humidity62%
Visibility—
Dew point62°
Tue, 1874° / 67°0.11
74 °
Arnold Heights, Tuesday, 18 August
Light rain. High 74°, low 67°.
Pressure30.03 inHg
Wind5.8 mph S
Humidity76%
Visibility—
Dew point65°
Wed, 1983° / 69°0
83 °
Arnold Heights, Wednesday, 19 August
Overcast. High 83°, low 69°.
Pressure29.91 inHg
Wind7.3 mph S
Humidity70%
Visibility—
Dew point67°
Thu, 2082° / 69°0.1
82 °
Arnold Heights, Thursday, 20 August
Light rain. High 82°, low 69°.
Pressure29.74 inHg
Wind14.6 mph NW
Humidity37%
Visibility—
Dew point52°
Fri, 2182° / 64°0
82 °
Arnold Heights, Friday, 21 August
Clear. High 82°, low 64°.
Pressure29.91 inHg
Wind10 mph NW
Humidity30%
Visibility—
Dew point45°
Sat, 2285° / 62°0
85 °
Arnold Heights, Saturday, 22 August
Mostly clear. High 85°, low 62°.
Pressure30.06 inHg
Wind6.4 mph SE
Humidity28%
Visibility—
Dew point46°
Sun, 2385° / 70°0.08
85 °
Arnold Heights, Sunday, 23 August
Light rain. High 85°, low 70°.
Pressure29.97 inHg
Wind11.4 mph SW
Humidity85%
Visibility—
Dew point70°
Mon, 2494° / 71°0
94 °
Arnold Heights, Monday, 24 August
Clear. High 94°, low 71°.
Pressure29.91 inHg
Wind10.5 mph W
Humidity36%
Visibility—
Dew point61°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2584° / 67°0.08
84 °
Arnold Heights, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.08 in
Chance of precipitation22%
Record high96° (1968)
Record low57° (1986)
Wed, 2684° / 67°0.05
84 °
Arnold Heights, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.05 in
Chance of precipitation17%
Record high95° (1975)
Record low57° (1963)
Thu, 2784° / 68°0.13
84 °
Arnold Heights, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.13 in
Chance of precipitation33%
Record high96° (1987)
Record low59° (1969)
Fri, 2884° / 69°0.16
84 °
Arnold Heights, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low69°
Average precipitation0.16 in
Chance of precipitation42%
Record high97° (1973)
Record low59° (1986)
Sat, 2984° / 68°0.13
84 °
Arnold Heights, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.13 in
Chance of precipitation32%
Record high95° (1973)
Record low51° (1986)
Sun, 3084° / 67°0.05
84 °
Arnold Heights, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.05 in
Chance of precipitation27%
Record high94° (1973)
Record low51° (1986)
Mon, 3183° / 67°0.06
83 °
Arnold Heights, Monday, 31 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.06 in
Chance of precipitation23%
Record high95° (1973)
Record low55° (1986)
Tue, 0182° / 66°0.15
82 °
Arnold Heights, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.15 in
Chance of precipitation30%
Record high95° (1980)
Record low56° (1967)
Wed, 0282° / 66°0.1
82 °
Arnold Heights, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.1 in
Chance of precipitation38%
Record high95° (1980)
Record low55° (1967)
Thu, 0382° / 66°0.12
82 °
Arnold Heights, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.12 in
Chance of precipitation32%
Record high96° (2023)
Record low52° (1967)
Fri, 0482° / 66°0.09
82 °
Arnold Heights, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.09 in
Chance of precipitation35%
Record high97° (2023)
Record low55° (1997)
Sat, 0581° / 66°0.14
81 °
Arnold Heights, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.14 in
Chance of precipitation30%
Record high98° (2023)
Record low53° (1997)
Sun, 0681° / 65°0.22
81 °
Arnold Heights, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.22 in
Chance of precipitation33%
Record high97° (2023)
Record low55° (2000)
Mon, 0781° / 64°0.07
81 °
Arnold Heights, Monday, 7 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.07 in
Chance of precipitation30%
Record high93° (1998)
Record low52° (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 Arnold Heights, 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 Arnold Heights, 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.