Monthly outlook for Glengarry, MT: average high 55.1°, average low 36.4°. That is 0.4° below the climate normal for October. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 9 October (79.4°), the coolest 16 October (15°).
55.1°/36.4°
Average high / low
−0.4°
Below normal
4 / 4
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
50.4°
56.1°
-3.2°
18 October – 27 October
63.1°
54.1°
+5°
28 October – 6 November
at normal
47.7°
—
October records over 66 years
87.4°1 October 2011All-time high
-16.4°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Lewistown (5 mi).
Fri, 0979° / 49°0
79 °
Glengarry, Friday, 9 October
Overcast. High 79°, low 49°.
Pressure29.53 inHg
Wind13.3 mph SW
Humidity19%
Visibility6.2 mi
Dew point30°
Sat, 1055° / 34°0.08
55 °
Glengarry, Saturday, 10 October
Snow. High 55°, low 34°.
Pressure29.71 inHg
Wind9.1 mph N
Humidity47%
Visibility6.2 mi
Dew point35°
Sun, 1136° / 33°0.39
36 °
Glengarry, Sunday, 11 October
Snow. High 36°, low 33°.
Pressure30.15 inHg
Wind4 mph NE
Humidity91%
Visibility6.2 mi
Dew point33°
Mon, 1241° / 32°0.03
41 °
Glengarry, Monday, 12 October
Light rain. High 41°, low 32°.
Pressure30.12 inHg
Wind5.3 mph E
Humidity81%
Visibility6.2 mi
Dew point31°
Tue, 1355° / 31°0
55 °
Glengarry, Tuesday, 13 October
Clear. High 55°, low 31°.
Pressure30.00 inHg
Wind5.3 mph SE
Humidity63%
Visibility—
Dew point33°
Wed, 1449° / 35°0.08
49 °
Glengarry, Wednesday, 14 October
Snow. High 49°, low 35°.
Pressure29.68 inHg
Wind19.3 mph NW
Humidity67%
Visibility—
Dew point37°
Thu, 1535° / 24°0.54
35 °
Glengarry, Thursday, 15 October
Snow. High 35°, low 24°.
Pressure30.53 inHg
Wind22.2 mph NW
Humidity96%
Visibility—
Dew point29°
Fri, 1635° / 15°0
35 °
Glengarry, Friday, 16 October
Clear. High 35°, low 15°.
Pressure30.71 inHg
Wind7.5 mph S
Humidity73%
Visibility—
Dew point23°
Sat, 1745° / 26°0
45 °
Glengarry, Saturday, 17 October
Clear. High 45°, low 26°.
Pressure30.36 inHg
Wind7.4 mph S
Humidity90%
Visibility—
Dew point37°
Sun, 1865° / 38°0
65 °
Glengarry, Sunday, 18 October
Clear. High 65°, low 38°.
Pressure29.83 inHg
Wind8 mph W
Humidity53%
Visibility—
Dew point39°
Mon, 1951° / 42°0
51 °
Glengarry, Monday, 19 October
Overcast. High 51°, low 42°.
Pressure30.06 inHg
Wind17.2 mph NW
Humidity66%
Visibility—
Dew point37°
Tue, 2062° / 40°0
62 °
Glengarry, Tuesday, 20 October
Clear. High 62°, low 40°.
Pressure30.03 inHg
Wind6.3 mph S
Humidity36%
Visibility—
Dew point28°
Wed, 2164° / 47°0
64 °
Glengarry, Wednesday, 21 October
Overcast. High 64°, low 47°.
Pressure30.03 inHg
Wind6.4 mph S
Humidity29%
Visibility—
Dew point26°
Thu, 2268° / 47°0
68 °
Glengarry, Thursday, 22 October
Clear. High 68°, low 47°.
Pressure30.00 inHg
Wind8.1 mph SW
Humidity24%
Visibility—
Dew point25°
Fri, 2368° / 48°0
68 °
Glengarry, Friday, 23 October
Partly cloudy. High 68°, low 48°.
Pressure29.85 inHg
Wind7.8 mph S
Humidity22%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2453° / 34°0.05
53 °
Glengarry, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high53°
Average low34°
Average precipitation0.05 in
Chance of precipitation32%
Record high77° (2007)
Record low8° (2020)
Sun, 2553° / 35°0.04
53 °
Glengarry, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high53°
Average low35°
Average precipitation0.04 in
Chance of precipitation23%
Record high73° (1990)
Record low-2° (2020)
Mon, 2652° / 34°0.06
52 °
Glengarry, Monday, 26 October
Climate normal for this date — 60-year average.
Average high52°
Average low34°
Average precipitation0.06 in
Chance of precipitation32%
Record high71° (1960)
Record low4° (2020)
Tue, 2751° / 32°0.05
51 °
Glengarry, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high51°
Average low32°
Average precipitation0.05 in
Chance of precipitation28%
Record high70° (2024)
Record low-3° (2023)
Wed, 2850° / 32°0.06
50 °
Glengarry, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.06 in
Chance of precipitation25%
Record high71° (1990)
Record low1° (2023)
Thu, 2948° / 31°0.04
48 °
Glengarry, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.04 in
Chance of precipitation22%
Record high72° (1968)
Record low-5° (1991)
Fri, 3048° / 29°0.04
48 °
Glengarry, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.04 in
Chance of precipitation27%
Record high68° (1987)
Record low-16° (1991)
Sat, 3148° / 30°0.05
48 °
Glengarry, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.05 in
Chance of precipitation22%
Record high69° (2008)
Record low0° (1984)
Sun, 0147° / 30°0.03
47 °
Glengarry, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.03 in
Chance of precipitation20%
Record high69° (2025)
Record low-5° (1991)
Mon, 0247° / 29°0.02
47 °
Glengarry, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.02 in
Chance of precipitation20%
Record high68° (2020)
Record low-16° (1991)
Tue, 0348° / 30°0.05
48 °
Glengarry, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.05 in
Chance of precipitation22%
Record high68° (1981)
Record low-9° (1991)
Wed, 0448° / 30°0.05
48 °
Glengarry, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.05 in
Chance of precipitation23%
Record high69° (1976)
Record low-4° (2003)
Thu, 0547° / 30°0.07
47 °
Glengarry, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.07 in
Chance of precipitation30%
Record high69° (2010)
Record low-15° (2003)
Fri, 0646° / 28°0.03
46 °
Glengarry, Friday, 6 November
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.03 in
Chance of precipitation18%
Record high69° (2010)
Record low-3° (2003)
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 Glengarry, MT 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 Glengarry, MT 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.