As of 21:17 EDT

Weather in Chestnut Hill, MD

78°Current weather

Chestnut Hill, Saturday, 8 August, 21:17

Partly cloudy. Feels like 79°. High 86°, low 71°.

Pressure29.97 inHg
Wind4 mph SW
Humidity87%
Visibility6.2 mi
Dew point73°

Monthly outlook for Chestnut Hill, MD: average high 82.5°, average low 67.7°. That is 0.2° above the climate normal for August. Precipitation is expected on 8 days (about 1.2 inches), against a normal of 6 days and 2.3 inches. The warmest day looks like 10 August (91.8°), the coolest 22 August (59.8°).

82.5°/67.7°
Average high / low
+0.2°
Above normal
8 / 6
Wet days / normal
1.2 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
8 August – 17 August84.3°82.9°+0.8°
18 August – 27 August79.4°81.4°-1.1°
28 August – 6 Septemberat normal80.7°

August records over 66 years

97.5°15 August 1988All-time high
48.6°30 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Parkville (4 mi).

Sun, 0988° / 73°0Clear
88 °Clear

Chestnut Hill, Sunday, 9 August

Clear. High 88°, low 73°.

Pressure30.03 inHg
Wind7.6 mph NW
Humidity47%
Visibility6.2 mi
Dew point66°
Mon, 1092° / 74°0.09Light rain
92 °Light rain

Chestnut Hill, Monday, 10 August

Light rain. High 92°, low 74°.

Pressure30.00 inHg
Wind7.3 mph NW
Humidity44%
Visibility6.2 mi
Dew point64°
Tue, 1188° / 71°0.26Rain
88 °Rain

Chestnut Hill, Tuesday, 11 August

Rain. High 88°, low 71°.

Pressure29.94 inHg
Wind6.1 mph NW
Humidity55%
Visibility6.2 mi
Dew point68°
Wed, 1290° / 72°0.11Light rain
90 °Light rain

Chestnut Hill, Wednesday, 12 August

Light rain. High 90°, low 72°.

Pressure29.77 inHg
Wind9.5 mph W
Humidity66%
Visibility6.2 mi
Dew point67°
Thu, 1385° / 70°0.04Light rain
85 °Light rain

Chestnut Hill, Thursday, 13 August

Light rain. High 85°, low 70°.

Pressure29.83 inHg
Wind13 mph NW
Humidity33%
Visibility
Dew point51°
Fri, 1478° / 64°0Overcast
78 °Overcast

Chestnut Hill, Friday, 14 August

Overcast. High 78°, low 64°.

Pressure30.06 inHg
Wind8.5 mph NW
Humidity38%
Visibility
Dew point47°
Sat, 1580° / 62°0Clear
80 °Clear

Chestnut Hill, Saturday, 15 August

Clear. High 80°, low 62°.

Pressure30.15 inHg
Wind11 mph N
Humidity34%
Visibility
Dew point47°
Sun, 1682° / 62°0Overcast
82 °Overcast

Chestnut Hill, Sunday, 16 August

Overcast. High 82°, low 62°.

Pressure30.18 inHg
Wind6.3 mph SE
Humidity34%
Visibility
Dew point48°
Mon, 1775° / 69°0.04Light rain
75 °Light rain

Chestnut Hill, Monday, 17 August

Light rain. High 75°, low 69°.

Pressure30.09 inHg
Wind8.9 mph S
Humidity62%
Visibility
Dew point60°
Tue, 1871° / 68°0.29Light rain
71 °Light rain

Chestnut Hill, Tuesday, 18 August

Light rain. High 71°, low 68°.

Pressure30.03 inHg
Wind7.8 mph S
Humidity87%
Visibility
Dew point67°
Wed, 1980° / 68°0.15Light rain
80 °Light rain

Chestnut Hill, Wednesday, 19 August

Light rain. High 80°, low 68°.

Pressure29.91 inHg
Wind8.9 mph S
Humidity79%
Visibility
Dew point67°
Thu, 2079° / 68°0.17Light rain
79 °Light rain

Chestnut Hill, Thursday, 20 August

Light rain. High 79°, low 68°.

Pressure29.71 inHg
Wind15.9 mph NW
Humidity41%
Visibility
Dew point52°
Fri, 2180° / 62°0Clear
80 °Clear

Chestnut Hill, Friday, 21 August

Clear. High 80°, low 62°.

Pressure29.91 inHg
Wind12.2 mph NW
Humidity34%
Visibility
Dew point46°
Sat, 2281° / 60°0Partly cloudy
81 °Partly cloudy

Chestnut Hill, Saturday, 22 August

Partly cloudy. High 81°, low 60°.

Pressure30.06 inHg
Wind5.7 mph N
Humidity30%
Visibility
Dew point44°
Sun, 2385° / 70°0.01Light rain
85 °Light rain

Chestnut Hill, Sunday, 23 August

Light rain. High 85°, low 70°.

Pressure29.94 inHg
Wind14 mph SW
Humidity59%
Visibility
Dew point64°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 65°0.07Climate normal
82 °Climate normal

Chestnut Hill, Monday, 24 August

Climate normal for this date — 60-year average.

Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation20%
Record high92° (1995)
Record low56° (1971)
Tue, 2582° / 66°0.06Climate normal
82 °Climate normal

Chestnut Hill, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°
Average low66°
Average precipitation0.06 in
Chance of precipitation22%
Record high94° (1968)
Record low56° (1987)
Wed, 2682° / 66°0.08Climate normal
82 °Climate normal

Chestnut Hill, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°
Average low66°
Average precipitation0.08 in
Chance of precipitation27%
Record high92° (1975)
Record low56° (1963)
Thu, 2783° / 67°0.17Climate normal
83 °Climate normal

Chestnut Hill, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high83°
Average low67°
Average precipitation0.17 in
Chance of precipitation38%
Record high92° (2020)
Record low58° (1969)
Fri, 2883° / 68°0.17Climate normal
83 °Climate normal

Chestnut Hill, Friday, 28 August

Climate normal for this date — 60-year average.

Average high83°
Average low68°
Average precipitation0.17 in
Chance of precipitation47%
Record high95° (1973)
Record low57° (1968)
Sat, 2982° / 67°0.12Climate normal
82 °Climate normal

Chestnut Hill, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high82°
Average low67°
Average precipitation0.12 in
Chance of precipitation32%
Record high93° (1973)
Record low51° (1982)
Sun, 3082° / 66°0.07Climate normal
82 °Climate normal

Chestnut Hill, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high82°
Average low66°
Average precipitation0.07 in
Chance of precipitation28%
Record high92° (1973)
Record low49° (1986)
Mon, 3181° / 66°0.08Climate normal
81 °Climate normal

Chestnut Hill, Monday, 31 August

Climate normal for this date — 60-year average.

Average high81°
Average low66°
Average precipitation0.08 in
Chance of precipitation28%
Record high93° (1973)
Record low54° (1976)
Tue, 0180° / 65°0.14Climate normal
80 °Climate normal

Chestnut Hill, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high80°
Average low65°
Average precipitation0.14 in
Chance of precipitation27%
Record high93° (2010)
Record low55° (1967)
Wed, 0280° / 65°0.11Climate normal
80 °Climate normal

Chestnut Hill, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high80°
Average low65°
Average precipitation0.11 in
Chance of precipitation40%
Record high93° (1980)
Record low54° (2009)
Thu, 0381° / 65°0.11Climate normal
81 °Climate normal

Chestnut Hill, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high81°
Average low65°
Average precipitation0.11 in
Chance of precipitation30%
Record high96° (2023)
Record low51° (1967)
Fri, 0480° / 65°0.1Climate normal
80 °Climate normal

Chestnut Hill, Friday, 4 September

Climate normal for this date — 60-year average.

Average high80°
Average low65°
Average precipitation0.1 in
Chance of precipitation32%
Record high98° (2023)
Record low54° (1997)
Sat, 0580° / 65°0.13Climate normal
80 °Climate normal

Chestnut Hill, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high80°
Average low65°
Average precipitation0.13 in
Chance of precipitation30%
Record high98° (2023)
Record low54° (1997)
Sun, 0679° / 64°0.25Climate normal
79 °Climate normal

Chestnut Hill, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high79°
Average low64°
Average precipitation0.25 in
Chance of precipitation33%
Record high98° (2023)
Record low53° (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 Chestnut Hill, 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 Chestnut Hill, 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.