As of 16:17 EDT

Weather in Keller, MD

87°

Keller, Saturday, 8 August, 16:17

Overcast. Feels like 98°. High 87°, low 71°.

Pressure30.00 inHg

Wind5.7 mph SW

Humidity71%

Visibility6.2 mi

Dew point75°

See detailed hourly forecast

Monthly outlook for Keller, MD: average high 83.2°, average low 64.6°. That is 0.4° below the climate normal for August. Precipitation is expected on 7 days (about 2.0 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 10 August (93.4°), the coolest 15 August (55.2°).

83.2°/64.6°

Average high / low

−0.4°

Below normal

7 / 6

Wet days / normal

2.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	84.9°	84.8°	+0.1°
18 August – 27 August	80.2°	83.2°	-1.7°
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

Climate normals and records are computed from the nearest reference point — Frederick (7 mi).

Sun, 0988° / 71°

88 °

Keller, Sunday, 9 August

Mostly clear. High 88°, low 71°.

Pressure30.03 inHg

Wind8.7 mph NW

Humidity47%

Visibility6.2 mi

Dew point65°

Mon, 1093° / 70°

0.99

93 °

Keller, Monday, 10 August

Heavy rain. High 93°, low 70°.

Pressure30.06 inHg

Wind8.9 mph NW

Humidity52%

Visibility6.2 mi

Dew point66°

Tue, 1190° / 68°

0.05

90 °

Keller, Tuesday, 11 August

Light rain. High 90°, low 68°.

Pressure29.97 inHg

Wind9.5 mph W

Humidity54%

Visibility6.2 mi

Dew point65°

Wed, 1284° / 68°

0.1

84 °

Keller, Wednesday, 12 August

Light rain. High 84°, low 68°.

Pressure29.83 inHg

Wind8.8 mph W

Humidity69%

Visibility6.2 mi

Dew point68°

Thu, 1387° / 69°

0.05

87 °

Keller, Thursday, 13 August

Light rain. High 87°, low 69°.

Pressure29.83 inHg

Wind12.4 mph W

Humidity46%

Visibility—

Dew point62°

Fri, 1478° / 62°

0.29

78 °

Keller, Friday, 14 August

Rain. High 78°, low 62°.

Pressure30.00 inHg

Wind6.3 mph NE

Humidity53%

Visibility—

Dew point55°

Sat, 1578° / 55°

78 °

Keller, Saturday, 15 August

Clear. High 78°, low 55°.

Pressure30.21 inHg

Wind8.6 mph NE

Humidity38%

Visibility—

Dew point47°

Sun, 1679° / 56°

79 °

Keller, Sunday, 16 August

Clear. High 79°, low 56°.

Pressure30.27 inHg

Wind5.4 mph SE

Humidity36%

Visibility—

Dew point47°

Mon, 1785° / 60°

85 °

Keller, Monday, 17 August

Mostly clear. High 85°, low 60°.

Pressure30.12 inHg

Wind7.6 mph S

Humidity50%

Visibility—

Dew point60°

Tue, 1874° / 66°

0.15

74 °

Keller, Tuesday, 18 August

Light rain. High 74°, low 66°.

Pressure29.97 inHg

Wind8 mph S

Humidity84%

Visibility—

Dew point69°

Wed, 1986° / 66°

0.01

86 °

Keller, Wednesday, 19 August

Light rain. High 86°, low 66°.

Pressure29.88 inHg

Wind9.1 mph NW

Humidity41%

Visibility—

Dew point57°

Thu, 2082° / 62°

82 °

Keller, Thursday, 20 August

Overcast. High 82°, low 62°.

Pressure29.97 inHg

Wind5.5 mph E

Humidity47%

Visibility—

Dew point56°

Fri, 2176° / 65°

0.31

76 °

Keller, Friday, 21 August

Rain. High 76°, low 65°.

Pressure29.85 inHg

Wind9.7 mph S

Humidity88%

Visibility—

Dew point71°

Sat, 2287° / 66°

87 °

Keller, Saturday, 22 August

Clear. High 87°, low 66°.

Pressure29.80 inHg

Wind11 mph NW

Humidity39%

Visibility—

Dew point55°

Sun, 2376° / 58°

76 °

Keller, Sunday, 23 August

Clear. High 76°, low 58°.

Pressure30.06 inHg

Wind16 mph NW

Humidity29%

Visibility—

Dew point38°

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

Mon, 2483° / 65°

0.06

83 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 °

Keller, 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 Keller, 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 Keller, 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.