Monthly outlook for Armacost, MD: average high 58.9°, average low 39.8°. That is 0.7° below the climate normal for October. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 4 days and 2.0 inches. The warmest day looks like 20 October (67.4°), the coolest 29 October (30.2°).
58.9°/39.8°
Average high / low
−0.7°
Below normal
1 / 4
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
60.4°
60.9°
-0.3°
29 October – 7 November
56.6°
57.8°
-0.7°
8 November – 17 November
at normal
53°
—
October records over 66 years
90.7°2 October 2019All-time high
27.1°24 October 1969All-time low
Climate normals and records are computed from the nearest reference point — Reisterstown (11 mi).
Tue, 2067° / 42°0
67 °
Armacost, Tuesday, 20 October
Clear. High 67°, low 42°.
Pressure30.30 inHg
Wind11.1 mph N
Humidity61%
Visibility6.2 mi
Dew point46°
Wed, 2159° / 37°0
59 °
Armacost, Wednesday, 21 October
Clear. High 59°, low 37°.
Pressure30.27 inHg
Wind7.7 mph N
Humidity60%
Visibility6.2 mi
Dew point42°
Thu, 2264° / 43°0
64 °
Armacost, Thursday, 22 October
Clear. High 64°, low 43°.
Pressure30.09 inHg
Wind11.9 mph NW
Humidity53%
Visibility6.2 mi
Dew point40°
Fri, 2352° / 42°0
52 °
Armacost, Friday, 23 October
Clear. High 52°, low 42°.
Pressure30.33 inHg
Wind12.2 mph N
Humidity54%
Visibility6.2 mi
Dew point33°
Sat, 2454° / 35°0
54 °
Armacost, Saturday, 24 October
Clear. High 54°, low 35°.
Pressure30.56 inHg
Wind7.9 mph N
Humidity61%
Visibility—
Dew point32°
Sun, 2560° / 41°0
60 °
Armacost, Sunday, 25 October
Clear. High 60°, low 41°.
Pressure30.56 inHg
Wind6.2 mph N
Humidity55%
Visibility—
Dew point37°
Mon, 2663° / 42°0
63 °
Armacost, Monday, 26 October
Overcast. High 63°, low 42°.
Pressure30.36 inHg
Wind8.4 mph SW
Humidity59%
Visibility—
Dew point40°
Tue, 2766° / 52°0.01
66 °
Armacost, Tuesday, 27 October
Light rain. High 66°, low 52°.
Pressure30.24 inHg
Wind6.5 mph NW
Humidity60%
Visibility—
Dew point47°
Wed, 2853° / 40°0.25
53 °
Armacost, Wednesday, 28 October
Rain. High 53°, low 40°.
Pressure30.12 inHg
Wind12.8 mph N
Humidity93%
Visibility—
Dew point45°
Thu, 2947° / 30°0
47 °
Armacost, Thursday, 29 October
Clear. High 47°, low 30°.
Pressure30.24 inHg
Wind14.7 mph N
Humidity52%
Visibility—
Dew point23°
Fri, 3053° / 33°0
53 °
Armacost, Friday, 30 October
Clear. High 53°, low 33°.
Pressure30.36 inHg
Wind9.5 mph NW
Humidity50%
Visibility—
Dew point28°
Sat, 3157° / 37°0
57 °
Armacost, Saturday, 31 October
Mostly clear. High 57°, low 37°.
Pressure30.39 inHg
Wind10.8 mph SW
Humidity46%
Visibility—
Dew point29°
Sun, 0161° / 39°0
61 °
Armacost, Sunday, 1 November
Clear. High 61°, low 39°.
Pressure30.30 inHg
Wind9.8 mph SW
Humidity43%
Visibility—
Dew point30°
Mon, 0263° / 44°0
63 °
Armacost, Monday, 2 November
Mostly clear. High 63°, low 44°.
Pressure30.21 inHg
Wind7.1 mph NE
Humidity68%
Visibility—
Dew point46°
Tue, 0358° / 46°0
58 °
Armacost, Tuesday, 3 November
Overcast. High 58°, low 46°.
Pressure30.00 inHg
Wind12.6 mph NE
Humidity76%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0457° / 42°0.09
57 °
Armacost, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.09 in
Chance of precipitation23%
Record high75° (1974)
Record low29° (2006)
Thu, 0557° / 42°0.11
57 °
Armacost, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.11 in
Chance of precipitation32%
Record high75° (1961)
Record low26° (1991)
Fri, 0656° / 42°0.07
56 °
Armacost, Friday, 6 November
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.07 in
Chance of precipitation25%
Record high79° (2024)
Record low27° (1967)
Sat, 0755° / 41°0.07
55 °
Armacost, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.07 in
Chance of precipitation23%
Record high74° (2024)
Record low28° (1962)
Sun, 0855° / 40°0.18
55 °
Armacost, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.18 in
Chance of precipitation20%
Record high74° (1975)
Record low26° (1960)
Mon, 0955° / 40°0.07
55 °
Armacost, Monday, 9 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.07 in
Chance of precipitation33%
Record high73° (1975)
Record low25° (2019)
Tue, 1056° / 40°0.15
56 °
Armacost, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high56°
Average low40°
Average precipitation0.15 in
Chance of precipitation33%
Record high72° (2020)
Record low28° (2017)
Wed, 1154° / 40°0.16
54 °
Armacost, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.16 in
Chance of precipitation27%
Record high70° (2006)
Record low21° (2017)
Thu, 1252° / 39°0.2
52 °
Armacost, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.2 in
Chance of precipitation38%
Record high70° (1964)
Record low26° (1987)
Fri, 1351° / 37°0.1
51 °
Armacost, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.1 in
Chance of precipitation37%
Record high69° (1964)
Record low21° (2019)
Sat, 1452° / 37°0.07
52 °
Armacost, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.07 in
Chance of precipitation18%
Record high70° (1985)
Record low23° (1986)
Sun, 1553° / 38°0.1
53 °
Armacost, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.1 in
Chance of precipitation33%
Record high73° (1993)
Record low25° (1967)
Mon, 1652° / 38°0.14
52 °
Armacost, Monday, 16 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.14 in
Chance of precipitation32%
Record high69° (2001)
Record low22° (1967)
Tue, 1751° / 37°0.08
51 °
Armacost, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.08 in
Chance of precipitation25%
Record high66° (1987)
Record low26° (1995)
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 Armacost, 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 Armacost, 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.