As of 14:27 EDT

Weather in Garrison, MD

90°

Garrison, Saturday, 8 August, 14:27

Partly cloudy. Feels like 102°. High 90°, low 70°.

Pressure30.03 inHg

Wind10.6 mph W

Humidity74%

Visibility6.2 mi

Dew point78°

See detailed hourly forecast

Monthly outlook for Garrison, MD: average high 80.4°, average low 64°. That is 0.8° below the climate normal for August. Precipitation is expected on 8 days (about 2.2 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 10 August (90.2°), the coolest 21 August (51.5°).

80.4°/64°

Average high / low

−0.8°

Below normal

8 / 6

Wet days / normal

2.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	84°	82.6°	+0.8°
18 August – 27 August	74.4°	81°	-3.7°
28 August – 6 September	at normal	80.2°	—

August records over 66 years

97.2°15 August 1988All-time high

48°30 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Reisterstown (5 mi).

Sun, 0989° / 70°

89 °

Garrison, Sunday, 9 August

Mostly clear. High 89°, low 70°.

Pressure30.03 inHg

Wind7.6 mph NW

Humidity47%

Visibility6.2 mi

Dew point65°

Mon, 1090° / 70°

0.23

90 °

Garrison, Monday, 10 August

Heavy rain. High 90°, low 70°.

Pressure30.03 inHg

Wind8.9 mph NW

Humidity49%

Visibility6.2 mi

Dew point66°

Tue, 1190° / 71°

0.79

90 °

Garrison, Tuesday, 11 August

Heavy rain. High 90°, low 71°.

Pressure29.94 inHg

Wind10.8 mph W

Humidity52%

Visibility6.2 mi

Dew point66°

Wed, 1282° / 68°

0.18

82 °

Garrison, Wednesday, 12 August

Rain. High 82°, low 68°.

Pressure29.83 inHg

Wind4.6 mph W

Humidity75%

Visibility6.2 mi

Dew point66°

Thu, 1388° / 71°

0.3

88 °

Garrison, Thursday, 13 August

Rain. High 88°, low 71°.

Pressure29.80 inHg

Wind9.7 mph SW

Humidity50%

Visibility—

Dew point64°

Fri, 1480° / 64°

0.01

80 °

Garrison, Friday, 14 August

Light rain. High 80°, low 64°.

Pressure30.00 inHg

Wind9.5 mph NW

Humidity35%

Visibility—

Dew point47°

Sat, 1580° / 61°

80 °

Garrison, Saturday, 15 August

Clear. High 80°, low 61°.

Pressure30.12 inHg

Wind8.5 mph W

Humidity41%

Visibility—

Dew point51°

Sun, 1683° / 64°

83 °

Garrison, Sunday, 16 August

Partly cloudy. High 83°, low 64°.

Pressure30.15 inHg

Wind5.9 mph NW

Humidity35%

Visibility—

Dew point50°

Mon, 1769° / 59°

0.15

69 °

Garrison, Monday, 17 August

Light rain. High 69°, low 59°.

Pressure30.21 inHg

Wind9.6 mph NE

Humidity74%

Visibility—

Dew point54°

Tue, 1867° / 61°

0.1

67 °

Garrison, Tuesday, 18 August

Light rain. High 67°, low 61°.

Pressure30.03 inHg

Wind10.3 mph E

Humidity95%

Visibility—

Dew point64°

Wed, 1985° / 67°

0.01

85 °

Garrison, Wednesday, 19 August

Light rain. High 85°, low 67°.

Pressure29.85 inHg

Wind7.2 mph NW

Humidity48%

Visibility—

Dew point61°

Thu, 2071° / 59°

0.37

71 °

Garrison, Thursday, 20 August

Rain. High 71°, low 59°.

Pressure29.91 inHg

Wind12.7 mph N

Humidity96%

Visibility—

Dew point63°

Fri, 2172° / 51°

72 °

Garrison, Friday, 21 August

Clear. High 72°, low 51°.

Pressure30.06 inHg

Wind11.7 mph N

Humidity34%

Visibility—

Dew point38°

Sat, 2274° / 56°

74 °

Garrison, Saturday, 22 August

Mostly clear. High 74°, low 56°.

Pressure30.06 inHg

Wind5.2 mph NW

Humidity32%

Visibility—

Dew point40°

Sun, 2378° / 61°

78 °

Garrison, Sunday, 23 August

Clear. High 78°, low 61°.

Pressure30.06 inHg

Wind8.1 mph SW

Humidity34%

Visibility—

Dew point45°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2481° / 64°

0.06

81 °

Garrison, Monday, 24 August

Climate normal for this date — 60-year average.

Average high81°

Average low64°

Average precipitation0.06 in

Chance of precipitation20%

Record high92° (1998)

Record low54° (1971)

Tue, 2582° / 65°

0.06

82 °

Garrison, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.06 in

Chance of precipitation20%

Record high94° (1968)

Record low55° (1987)

Wed, 2682° / 65°

0.06

82 °

Garrison, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.06 in

Chance of precipitation25%

Record high93° (1975)

Record low55° (1963)

Thu, 2782° / 66°

0.15

82 °

Garrison, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high82°

Average low66°

Average precipitation0.15 in

Chance of precipitation37%

Record high91° (2020)

Record low55° (1969)

Fri, 2882° / 66°

0.17

82 °

Garrison, Friday, 28 August

Climate normal for this date — 60-year average.

Average high82°

Average low66°

Average precipitation0.17 in

Chance of precipitation45%

Record high95° (1973)

Record low55° (1968)

Sat, 2981° / 66°

0.1

81 °

Garrison, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high81°

Average low66°

Average precipitation0.1 in

Chance of precipitation30%

Record high94° (1973)

Record low49° (1982)

Sun, 3082° / 65°

0.07

82 °

Garrison, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.07 in

Chance of precipitation25%

Record high93° (1973)

Record low48° (1986)

Mon, 3181° / 65°

0.07

81 °

Garrison, Monday, 31 August

Climate normal for this date — 60-year average.

Average high81°

Average low65°

Average precipitation0.07 in

Chance of precipitation28%

Record high94° (1973)

Record low52° (1976)

Tue, 0179° / 64°

0.13

79 °

Garrison, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high79°

Average low64°

Average precipitation0.13 in

Chance of precipitation28%

Record high94° (1973)

Record low52° (1967)

Wed, 0280° / 63°

0.12

80 °

Garrison, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high80°

Average low63°

Average precipitation0.12 in

Chance of precipitation40%

Record high94° (1980)

Record low53° (1967)

Thu, 0380° / 64°

0.11

80 °

Garrison, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.11 in

Chance of precipitation28%

Record high93° (2023)

Record low49° (1967)

Fri, 0480° / 64°

0.11

80 °

Garrison, Friday, 4 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.11 in

Chance of precipitation35%

Record high96° (2023)

Record low52° (1997)

Sat, 0579° / 63°

0.14

79 °

Garrison, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high79°

Average low63°

Average precipitation0.14 in

Chance of precipitation30%

Record high95° (2023)

Record low52° (1997)

Sun, 0679° / 63°

0.25

79 °

Garrison, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high79°

Average low63°

Average precipitation0.25 in

Chance of precipitation32%

Record high95° (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 Garrison, 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 Garrison, 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.