Monthly outlook for McNamara, MT: average high 39.5°, average low 27.6°. That is 1.4° above the climate normal for November. Precipitation is expected on 6 days (about 0.9 inches), against a normal of 6 days and 1.0 inches. The warmest day looks like 14 November (43.1°), the coolest 27 November (24.4°).
39.5°/27.6°
Average high / low
+1.4°
Above normal
6 / 6
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 November – 23 November
39.5°
38.7°
+0.5°
24 November – 3 December
39.4°
33.9°
+3.1°
4 December – 13 December
at normal
31.1°
—
November records over 66 years
64.6°5 November 2020All-time high
-19.8°22 November 1970All-time low
Climate normals and records are computed from the nearest reference point — Potomac (5 mi).
Sun, 1542° / 25°0
42 °
McNamara, Sunday, 15 November
Clear. High 42°, low 25°.
Pressure29.97 inHg
Wind3.3 mph SW
Humidity62%
Visibility6.2 mi
Dew point26°
Mon, 1640° / 27°0.17
40 °
McNamara, Monday, 16 November
Snow. High 40°, low 27°.
Pressure30.06 inHg
Wind2.2 mph SW
Humidity96%
Visibility5.5 mi
Dew point37°
Tue, 1735° / 30°0.38
35 °
McNamara, Tuesday, 17 November
Snow. High 35°, low 30°.
Pressure29.97 inHg
Wind0.6 mph NW
Humidity94%
Visibility1.6 mi
Dew point32°
Wed, 1834° / 26°0
34 °
McNamara, Wednesday, 18 November
Partly cloudy. High 34°, low 26°.
Pressure30.18 inHg
Wind2 mph E
Humidity94%
Visibility3.5 mi
Dew point26°
Thu, 1938° / 27°0
38 °
McNamara, Thursday, 19 November
Overcast. High 38°, low 27°.
Pressure30.12 inHg
Wind1.9 mph NE
Humidity88%
Visibility—
Dew point30°
Fri, 2039° / 28°0
39 °
McNamara, Friday, 20 November
Overcast. High 39°, low 28°.
Pressure30.03 inHg
Wind3.1 mph W
Humidity89%
Visibility—
Dew point31°
Sat, 2140° / 26°0
40 °
McNamara, Saturday, 21 November
Overcast. High 40°, low 26°.
Pressure30.27 inHg
Wind3.4 mph W
Humidity84%
Visibility—
Dew point31°
Sun, 2241° / 26°0
41 °
McNamara, Sunday, 22 November
Overcast. High 41°, low 26°.
Pressure30.12 inHg
Wind2.5 mph NE
Humidity77%
Visibility—
Dew point28°
Mon, 2343° / 28°0
43 °
McNamara, Monday, 23 November
Overcast. High 43°, low 28°.
Pressure30.09 inHg
Wind4 mph W
Humidity74%
Visibility—
Dew point30°
Tue, 2442° / 27°0.04
42 °
McNamara, Tuesday, 24 November
Light snow. High 42°, low 27°.
Pressure29.97 inHg
Wind3.7 mph W
Humidity73%
Visibility—
Dew point29°
Wed, 2539° / 26°0.07
39 °
McNamara, Wednesday, 25 November
Light snow. High 39°, low 26°.
Pressure29.97 inHg
Wind8.7 mph W
Humidity93%
Visibility—
Dew point36°
Thu, 2636° / 26°0.08
36 °
McNamara, Thursday, 26 November
Light snow. High 36°, low 26°.
Pressure30.15 inHg
Wind8.4 mph W
Humidity86%
Visibility—
Dew point29°
Fri, 2736° / 24°0.01
36 °
McNamara, Friday, 27 November
Light snow. High 36°, low 24°.
Pressure30.30 inHg
Wind4.1 mph SW
Humidity76%
Visibility—
Dew point25°
Sat, 2840° / 28°0.08
40 °
McNamara, Saturday, 28 November
Light snow. High 40°, low 28°.
Pressure30.00 inHg
Wind3.6 mph SW
Humidity89%
Visibility—
Dew point33°
Sun, 2943° / 36°0.11
43 °
McNamara, Sunday, 29 November
Snow. High 43°, low 36°.
Pressure29.94 inHg
Wind3.8 mph SW
Humidity97%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 3033° / 19°0.05
33 °
McNamara, Monday, 30 November
Climate normal for this date — 60-year average.
Average high33°
Average low19°
Average precipitation0.05 in
Chance of precipitation30%
Record high47° (2021)
Record low-14° (1985)
Tue, 0134° / 18°0.09
34 °
McNamara, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high34°
Average low18°
Average precipitation0.09 in
Chance of precipitation43%
Record high60° (2021)
Record low-19° (1985)
Wed, 0234° / 19°0.14
34 °
McNamara, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high34°
Average low19°
Average precipitation0.14 in
Chance of precipitation43%
Record high53° (2021)
Record low-18° (1985)
Thu, 0333° / 19°0.06
33 °
McNamara, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high33°
Average low19°
Average precipitation0.06 in
Chance of precipitation38%
Record high48° (1987)
Record low-13° (1984)
Fri, 0432° / 17°0.07
32 °
McNamara, Friday, 4 December
Climate normal for this date — 60-year average.
Average high32°
Average low17°
Average precipitation0.07 in
Chance of precipitation37%
Record high47° (2019)
Record low-23° (1972)
Sat, 0531° / 16°0.06
31 °
McNamara, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high31°
Average low16°
Average precipitation0.06 in
Chance of precipitation33%
Record high55° (2023)
Record low-33° (1972)
Sun, 0631° / 16°0.07
31 °
McNamara, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high31°
Average low16°
Average precipitation0.07 in
Chance of precipitation33%
Record high50° (2023)
Record low-27° (1972)
Mon, 0730° / 14°0.06
30 °
McNamara, Monday, 7 December
Climate normal for this date — 60-year average.
Average high30°
Average low14°
Average precipitation0.06 in
Chance of precipitation40%
Record high47° (2019)
Record low-25° (2013)
Tue, 0830° / 14°0.05
30 °
McNamara, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high30°
Average low14°
Average precipitation0.05 in
Chance of precipitation33%
Record high54° (2020)
Record low-36° (1972)
Wed, 0930° / 15°0.06
30 °
McNamara, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high30°
Average low15°
Average precipitation0.06 in
Chance of precipitation42%
Record high46° (2025)
Record low-32° (1972)
Thu, 1032° / 17°0.08
32 °
McNamara, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high32°
Average low17°
Average precipitation0.08 in
Chance of precipitation45%
Record high48° (2025)
Record low-24° (1961)
Fri, 1132° / 17°0.05
32 °
McNamara, Friday, 11 December
Climate normal for this date — 60-year average.
Average high32°
Average low17°
Average precipitation0.05 in
Chance of precipitation28%
Record high50° (2025)
Record low-23° (1961)
Sat, 1231° / 17°0.07
31 °
McNamara, Saturday, 12 December
Climate normal for this date — 60-year average.
Average high31°
Average low17°
Average precipitation0.07 in
Chance of precipitation35%
Record high47° (2025)
Record low-18° (2000)
Sun, 1331° / 16°0.07
31 °
McNamara, Sunday, 13 December
Climate normal for this date — 60-year average.
Average high31°
Average low16°
Average precipitation0.07 in
Chance of precipitation42%
Record high46° (2025)
Record low-10° (1978)
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.