Monthly outlook for McNamara, MT: average high 46.9°, average low 32.4°. That is 1.4° above the climate normal for October. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 6 days and 1.0 inches. The warmest day looks like 30 October (54.8°), the coolest 12 November (24.3°).
46.9°/32.4°
Average high / low
+1.4°
Above normal
4 / 6
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
29 October – 7 November
48.3°
45.8°
+1.4°
8 November – 17 November
44.5°
41.4°
+1.7°
18 November – 27 November
at normal
36.2°
—
October records over 66 years
84.4°1 October 1992All-time high
-9.6°25 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Potomac (5 mi).
Fri, 3055° / 33°0.02
55 °
McNamara, Friday, 30 October
Light rain. High 55°, low 33°.
Pressure30.03 inHg
Wind3.2 mph NE
Humidity75%
Visibility6.2 mi
Dew point28°
Sat, 3147° / 33°0
47 °
McNamara, Saturday, 31 October
Overcast. High 47°, low 33°.
Pressure30.06 inHg
Wind1.9 mph SE
Humidity80%
Visibility2.2 mi
Dew point36°
Sun, 0142° / 36°0.24
42 °
McNamara, Sunday, 1 November
Light rain. High 42°, low 36°.
Pressure29.88 inHg
Wind1.2 mph NE
Humidity91%
Visibility3.1 mi
Dew point38°
Mon, 0243° / 30°0
43 °
McNamara, Monday, 2 November
Overcast. High 43°, low 30°.
Pressure30.30 inHg
Wind4.3 mph SW
Humidity84%
Visibility4.0 mi
Dew point33°
Tue, 0347° / 31°0
47 °
McNamara, Tuesday, 3 November
Overcast. High 47°, low 31°.
Pressure30.30 inHg
Wind2.4 mph S
Humidity70%
Visibility—
Dew point30°
Wed, 0454° / 34°0
54 °
McNamara, Wednesday, 4 November
Partly cloudy. High 54°, low 34°.
Pressure30.00 inHg
Wind4.3 mph NE
Humidity47%
Visibility—
Dew point27°
Thu, 0551° / 36°0
51 °
McNamara, Thursday, 5 November
Overcast. High 51°, low 36°.
Pressure29.83 inHg
Wind3.8 mph NE
Humidity54%
Visibility—
Dew point29°
Fri, 0646° / 36°0.01
46 °
McNamara, Friday, 6 November
Light snow. High 46°, low 36°.
Pressure29.94 inHg
Wind8.3 mph W
Humidity73%
Visibility—
Dew point36°
Sat, 0748° / 33°0.01
48 °
McNamara, Saturday, 7 November
Light snow. High 48°, low 33°.
Pressure30.21 inHg
Wind3.5 mph W
Humidity73%
Visibility—
Dew point34°
Sun, 0851° / 33°0
51 °
McNamara, Sunday, 8 November
Overcast. High 51°, low 33°.
Pressure30.00 inHg
Wind5 mph W
Humidity49%
Visibility—
Dew point27°
Mon, 0945° / 34°0.09
45 °
McNamara, Monday, 9 November
Snow. High 45°, low 34°.
Pressure29.91 inHg
Wind3.9 mph E
Humidity91%
Visibility—
Dew point39°
Tue, 1048° / 35°0.05
48 °
McNamara, Tuesday, 10 November
Snow. High 48°, low 35°.
Pressure29.41 inHg
Wind4.3 mph W
Humidity77%
Visibility—
Dew point35°
Wed, 1141° / 32°0.23
41 °
McNamara, Wednesday, 11 November
Snow. High 41°, low 32°.
Pressure29.62 inHg
Wind11.9 mph W
Humidity74%
Visibility—
Dew point31°
Thu, 1242° / 24°0.04
42 °
McNamara, Thursday, 12 November
Light snow. High 42°, low 24°.
Pressure29.74 inHg
Wind4.7 mph W
Humidity71%
Visibility—
Dew point28°
Fri, 1340° / 26°0
40 °
McNamara, Friday, 13 November
Partly cloudy. High 40°, low 26°.
Pressure30.00 inHg
Wind8.1 mph W
Humidity74%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 1441° / 26°0.06
41 °
McNamara, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high41°
Average low26°
Average precipitation0.06 in
Chance of precipitation38%
Record high59° (2021)
Record low-1° (2000)
Sun, 1542° / 25°0.02
42 °
McNamara, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high42°
Average low25°
Average precipitation0.02 in
Chance of precipitation13%
Record high63° (2021)
Record low4° (2014)
Mon, 1640° / 26°0.07
40 °
McNamara, Monday, 16 November
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.07 in
Chance of precipitation40%
Record high55° (2021)
Record low-4° (1961)
Tue, 1740° / 26°0.06
40 °
McNamara, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.06 in
Chance of precipitation43%
Record high55° (1976)
Record low-2° (1968)
Wed, 1839° / 24°0.07
39 °
McNamara, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high39°
Average low24°
Average precipitation0.07 in
Chance of precipitation47%
Record high56° (2008)
Record low2° (1994)
Thu, 1938° / 24°0.06
38 °
McNamara, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high38°
Average low24°
Average precipitation0.06 in
Chance of precipitation28%
Record high51° (1989)
Record low-2° (1978)
Fri, 2038° / 24°0.06
38 °
McNamara, Friday, 20 November
Climate normal for this date — 60-year average.
Average high38°
Average low24°
Average precipitation0.06 in
Chance of precipitation38%
Record high52° (1989)
Record low-5° (1977)
Sat, 2137° / 22°0.05
37 °
McNamara, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high37°
Average low22°
Average precipitation0.05 in
Chance of precipitation35%
Record high51° (2002)
Record low-5° (1977)
Sun, 2236° / 21°0.06
36 °
McNamara, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high36°
Average low21°
Average precipitation0.06 in
Chance of precipitation38%
Record high54° (2021)
Record low-20° (1970)
Mon, 2336° / 21°0.05
36 °
McNamara, Monday, 23 November
Climate normal for this date — 60-year average.
Average high36°
Average low21°
Average precipitation0.05 in
Chance of precipitation37%
Record high57° (2017)
Record low-15° (1993)
Tue, 2435° / 23°0.11
35 °
McNamara, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high35°
Average low23°
Average precipitation0.11 in
Chance of precipitation48%
Record high46° (1976)
Record low-6° (1985)
Wed, 2535° / 21°0.12
35 °
McNamara, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high35°
Average low21°
Average precipitation0.12 in
Chance of precipitation48%
Record high48° (2022)
Record low-7° (2010)
Thu, 2634° / 20°0.07
34 °
McNamara, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high34°
Average low20°
Average precipitation0.07 in
Chance of precipitation35%
Record high52° (2017)
Record low-3° (1985)
Fri, 2734° / 20°0.06
34 °
McNamara, Friday, 27 November
Climate normal for this date — 60-year average.
Average high34°
Average low20°
Average precipitation0.06 in
Chance of precipitation48%
Record high50° (2021)
Record low-6° (1967)
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 McNamara, 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 McNamara, 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.