Monthly outlook for Polson, MT: average high 53.9°, average low 39.2°. That is 0.8° below the climate normal for October. Precipitation is expected on 5 days (about 0.7 inches), against a normal of 6 days and 1.4 inches. The warmest day looks like 9 October (73.1°), the coolest 16 October (32.4°).
53.9°/39.2°
Average high / low
−0.8°
Below normal
5 / 6
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
54.5°
56.1°
-0.9°
18 October – 27 October
52.8°
52.4°
+0.2°
28 October – 6 November
at normal
46°
—
October records over 66 years
81.7°1 October 1992All-time high
6.4°26 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Turtle Lake (3 mi).
Fri, 0973° / 42°0.01
73 °
Polson, Friday, 9 October
Light rain. High 73°, low 42°.
Pressure29.56 inHg
Wind11 mph S
Humidity40%
Visibility6.2 mi
Dew point41°
Sat, 1052° / 40°0.03
52 °
Polson, Saturday, 10 October
Light rain. High 52°, low 40°.
Pressure29.74 inHg
Wind10.2 mph N
Humidity58%
Visibility6.2 mi
Dew point37°
Sun, 1144° / 40°0.01
44 °
Polson, Sunday, 11 October
Light rain. High 44°, low 40°.
Pressure30.03 inHg
Wind15.5 mph NE
Humidity65%
Visibility6.2 mi
Dew point26°
Mon, 1249° / 40°0
49 °
Polson, Monday, 12 October
Light rain. High 49°, low 40°.
Pressure30.03 inHg
Wind11.1 mph NE
Humidity61%
Visibility—
Dew point32°
Tue, 1353° / 41°0
53 °
Polson, Tuesday, 13 October
Partly cloudy. High 53°, low 41°.
Pressure30.06 inHg
Wind2.6 mph S
Humidity72%
Visibility—
Dew point39°
Wed, 1449° / 45°0.13
49 °
Polson, Wednesday, 14 October
Light rain. High 49°, low 45°.
Pressure29.80 inHg
Wind6.9 mph SW
Humidity80%
Visibility—
Dew point40°
Thu, 1547° / 37°0.12
47 °
Polson, Thursday, 15 October
Snow. High 47°, low 37°.
Pressure30.47 inHg
Wind5.4 mph N
Humidity56%
Visibility—
Dew point28°
Fri, 1650° / 32°0
50 °
Polson, Friday, 16 October
Clear. High 50°, low 32°.
Pressure30.53 inHg
Wind3.5 mph E
Humidity54%
Visibility—
Dew point27°
Sat, 1756° / 34°0
56 °
Polson, Saturday, 17 October
Overcast. High 56°, low 34°.
Pressure30.27 inHg
Wind3.3 mph SW
Humidity48%
Visibility—
Dew point29°
Sun, 1857° / 38°0
57 °
Polson, Sunday, 18 October
Clear. High 57°, low 38°.
Pressure30.18 inHg
Wind3.4 mph S
Humidity53%
Visibility—
Dew point33°
Mon, 1959° / 42°0
59 °
Polson, Monday, 19 October
Clear. High 59°, low 42°.
Pressure30.15 inHg
Wind4 mph E
Humidity51%
Visibility—
Dew point34°
Tue, 2066° / 43°0
66 °
Polson, Tuesday, 20 October
Overcast. High 66°, low 43°.
Pressure30.03 inHg
Wind14.6 mph SW
Humidity45%
Visibility—
Dew point31°
Wed, 2151° / 41°0.19
51 °
Polson, Wednesday, 21 October
Light rain. High 51°, low 41°.
Pressure29.41 inHg
Wind23.2 mph SW
Humidity83%
Visibility—
Dew point44°
Thu, 2243° / 35°0.04
43 °
Polson, Thursday, 22 October
Snow. High 43°, low 35°.
Pressure29.56 inHg
Wind8.5 mph S
Humidity56%
Visibility—
Dew point27°
Fri, 2341° / 35°0.19
41 °
Polson, Friday, 23 October
Snow. High 41°, low 35°.
Pressure29.68 inHg
Wind4 mph S
Humidity87%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2452° / 38°0.09
52 °
Polson, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.09 in
Chance of precipitation35%
Record high69° (2007)
Record low17° (2020)
Sun, 2551° / 38°0.07
51 °
Polson, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.07 in
Chance of precipitation37%
Record high66° (2005)
Record low7° (2020)
Mon, 2650° / 37°0.11
50 °
Polson, Monday, 26 October
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.11 in
Chance of precipitation52%
Record high66° (1986)
Record low6° (2020)
Tue, 2749° / 36°0.12
49 °
Polson, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.12 in
Chance of precipitation52%
Record high62° (1985)
Record low21° (1971)
Wed, 2849° / 36°0.1
49 °
Polson, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.1 in
Chance of precipitation47%
Record high62° (2008)
Record low14° (1971)
Thu, 2947° / 35°0.11
47 °
Polson, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.11 in
Chance of precipitation48%
Record high64° (1987)
Record low12° (1991)
Fri, 3046° / 34°0.08
46 °
Polson, Friday, 30 October
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.08 in
Chance of precipitation38%
Record high64° (2008)
Record low13° (2002)
Sat, 3146° / 34°0.12
46 °
Polson, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.12 in
Chance of precipitation50%
Record high62° (1988)
Record low14° (2002)
Sun, 0146° / 34°0.12
46 °
Polson, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.12 in
Chance of precipitation48%
Record high63° (1988)
Record low9° (1991)
Mon, 0246° / 34°0.13
46 °
Polson, Monday, 2 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.13 in
Chance of precipitation47%
Record high62° (1981)
Record low12° (1991)
Tue, 0346° / 34°0.07
46 °
Polson, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.07 in
Chance of precipitation38%
Record high61° (1981)
Record low10° (1973)
Wed, 0445° / 35°0.14
45 °
Polson, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high45°
Average low35°
Average precipitation0.14 in
Chance of precipitation62%
Record high59° (1975)
Record low9° (1973)
Thu, 0545° / 34°0.12
45 °
Polson, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high45°
Average low34°
Average precipitation0.12 in
Chance of precipitation63%
Record high61° (1980)
Record low15° (2003)
Fri, 0644° / 33°0.14
44 °
Polson, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.14 in
Chance of precipitation62%
Record high62° (2010)
Record low17° (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 Polson, 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 Polson, 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.