As of 07:53 EDT

Weather in Glenallen, MD

46°

Glenallen, Friday, 23 October, 07:53

Clear. Feels like 45°. High 64°, low 43°.

Pressure30.30 inHg

Wind3.4 mph N

Humidity88%

Visibility6.2 mi

Dew point42°

See detailed hourly forecast

Monthly outlook for Glenallen, MD: average high 63°, average low 48.4°. That is 1.3° above the climate normal for October. Precipitation is expected on 2 days (about 0.9 inches), against a normal of 4 days and 1.8 inches. The warmest day looks like 31 October (71.6°), the coolest 24 October (38.8°).

63°/48.4°

Average high / low

+1.3°

Above normal

2 / 4

Wet days / normal

0.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
23 October – 1 November	66°	61.4°	+2.5°
2 November – 11 November	58.1°	58.2°	-0.1°
12 November – 21 November	at normal	53.1°	—

October records over 66 years

93.7°2 October 2019All-time high

29.1°28 October 1976All-time low

Climate normals and records are computed from the nearest reference point — Glenmont (1 mi).

Sat, 2463° / 39°

63 °

Glenallen, Saturday, 24 October

Clear. High 63°, low 39°.

Pressure30.53 inHg

Wind3.7 mph SE

Humidity44%

Visibility6.2 mi

Dew point36°

Sun, 2564° / 42°

64 °

Glenallen, Sunday, 25 October

Clear. High 64°, low 42°.

Pressure30.56 inHg

Wind1.8 mph SE

Humidity49%

Visibility6.2 mi

Dew point41°

Mon, 2667° / 45°

67 °

Glenallen, Monday, 26 October

Clear. High 67°, low 45°.

Pressure30.36 inHg

Wind5.3 mph W

Humidity54%

Visibility6.2 mi

Dew point46°

Tue, 2768° / 53°

68 °

Glenallen, Tuesday, 27 October

Clear. High 68°, low 53°.

Pressure30.33 inHg

Wind7.4 mph N

Humidity58%

Visibility—

Dew point46°

Wed, 2862° / 49°

62 °

Glenallen, Wednesday, 28 October

Overcast. High 62°, low 49°.

Pressure30.39 inHg

Wind7.2 mph SE

Humidity73%

Visibility—

Dew point47°

Thu, 2967° / 53°

67 °

Glenallen, Thursday, 29 October

Overcast. High 67°, low 53°.

Pressure30.45 inHg

Wind6.4 mph SE

Humidity62%

Visibility—

Dew point47°

Fri, 3067° / 53°

67 °

Glenallen, Friday, 30 October

Overcast. High 67°, low 53°.

Pressure30.39 inHg

Wind5.9 mph S

Humidity66%

Visibility—

Dew point49°

Sat, 3172° / 55°

0.02

72 °

Glenallen, Saturday, 31 October

Light rain. High 72°, low 55°.

Pressure30.24 inHg

Wind9 mph S

Humidity69%

Visibility—

Dew point52°

Sun, 0167° / 64°

0.5

67 °

Glenallen, Sunday, 1 November

Rain. High 67°, low 64°.

Pressure30.03 inHg

Wind12.6 mph S

Humidity95%

Visibility—

Dew point63°

Mon, 0269° / 52°

0.04

69 °

Glenallen, Monday, 2 November

Light rain. High 69°, low 52°.

Pressure29.97 inHg

Wind10.9 mph NW

Humidity57%

Visibility—

Dew point49°

Tue, 0353° / 46°

53 °

Glenallen, Tuesday, 3 November

Clear. High 53°, low 46°.

Pressure30.09 inHg

Wind13.3 mph NW

Humidity56%

Visibility—

Dew point36°

Wed, 0458° / 42°

58 °

Glenallen, Wednesday, 4 November

Clear. High 58°, low 42°.

Pressure30.18 inHg

Wind11 mph W

Humidity51%

Visibility—

Dew point33°

Thu, 0558° / 43°

58 °

Glenallen, Thursday, 5 November

Clear. High 58°, low 43°.

Pressure30.36 inHg

Wind8.3 mph NW

Humidity52%

Visibility—

Dew point34°

Fri, 0659° / 46°

59 °

Glenallen, Friday, 6 November

Overcast. High 59°, low 46°.

Pressure30.39 inHg

Wind6.6 mph S

Humidity55%

Visibility—

Dew point37°

Sat, 0752° / 49°

0.33

52 °

Glenallen, Saturday, 7 November

Rain. High 52°, low 49°.

Pressure30.18 inHg

Wind10.6 mph NE

Humidity95%

Visibility—

Dew point49°

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

Sun, 0857° / 42°

0.16

57 °

Glenallen, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.16 in

Chance of precipitation22%

Record high75° (1975)

Record low28° (1960)

Mon, 0957° / 42°

0.06

57 °

Glenallen, Monday, 9 November

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.06 in

Chance of precipitation27%

Record high75° (2023)

Record low26° (2019)

Tue, 1058° / 42°

0.13

58 °

Glenallen, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high58°

Average low42°

Average precipitation0.13 in

Chance of precipitation32%

Record high72° (1975)

Record low30° (1973)

Wed, 1156° / 42°

0.19

56 °

Glenallen, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high56°

Average low42°

Average precipitation0.19 in

Chance of precipitation27%

Record high72° (2006)

Record low22° (2017)

Thu, 1254° / 41°

0.23

54 °

Glenallen, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high54°

Average low41°

Average precipitation0.23 in

Chance of precipitation37%

Record high71° (1964)

Record low28° (1987)

Fri, 1353° / 39°

0.1

53 °

Glenallen, Friday, 13 November

Climate normal for this date — 60-year average.

Average high53°

Average low39°

Average precipitation0.1 in

Chance of precipitation35%

Record high71° (1964)

Record low22° (2019)

Sat, 1454° / 39°

0.07

54 °

Glenallen, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.07 in

Chance of precipitation13%

Record high73° (1985)

Record low24° (1986)

Sun, 1555° / 40°

0.09

55 °

Glenallen, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high55°

Average low40°

Average precipitation0.09 in

Chance of precipitation23%

Record high76° (1993)

Record low27° (1967)

Mon, 1654° / 39°

0.12

54 °

Glenallen, Monday, 16 November

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.12 in

Chance of precipitation30%

Record high72° (2005)

Record low24° (1967)

Tue, 1753° / 38°

0.08

53 °

Glenallen, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.08 in

Chance of precipitation28%

Record high68° (1987)

Record low28° (1995)

Wed, 1853° / 38°

0.06

53 °

Glenallen, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.06 in

Chance of precipitation28%

Record high70° (2021)

Record low26° (2014)

Thu, 1953° / 38°

0.11

53 °

Glenallen, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.11 in

Chance of precipitation28%

Record high69° (1985)

Record low23° (2014)

Fri, 2053° / 39°

0.07

53 °

Glenallen, Friday, 20 November

Climate normal for this date — 60-year average.

Average high53°

Average low39°

Average precipitation0.07 in

Chance of precipitation25%

Record high74° (1985)

Record low27° (2022)

Sat, 2151° / 38°

0.09

51 °

Glenallen, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high51°

Average low38°

Average precipitation0.09 in

Chance of precipitation23%

Record high74° (1991)

Record low25° (2022)

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 Glenallen, 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 Glenallen, 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.