Monthly outlook for Westby, MT: average high 51.1°, average low 35°. That is 0.5° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (71.5°), the coolest 30 October (17.5°).
51.1°/35°
Average high / low
+0.5°
Above normal
3 / 3
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
58.1°
52.1°
+3.4°
25 October – 3 November
39.4°
45.7°
-3.5°
4 November – 13 November
at normal
38.8°
—
October records over 66 years
85.8°1 October 1992All-time high
-2.9°30 October 1984All-time low
Climate normals and records are computed from the nearest reference point — McElroy (3 mi).
Fri, 1654° / 27°0
54 °
Westby, Friday, 16 October
Clear. High 54°, low 27°.
Pressure30.53 inHg
Wind14.3 mph S
Humidity54%
Visibility6.2 mi
Dew point27°
Sat, 1768° / 38°0
68 °
Westby, Saturday, 17 October
Clear. High 68°, low 38°.
Pressure29.88 inHg
Wind10.7 mph SW
Humidity38%
Visibility6.2 mi
Dew point36°
Sun, 1859° / 42°0
59 °
Westby, Sunday, 18 October
Mostly clear. High 59°, low 42°.
Pressure30.21 inHg
Wind6.1 mph NW
Humidity43%
Visibility6.2 mi
Dew point29°
Mon, 1961° / 37°0
61 °
Westby, Monday, 19 October
Partly cloudy. High 61°, low 37°.
Pressure30.12 inHg
Wind11.1 mph SE
Humidity53%
Visibility—
Dew point36°
Tue, 2061° / 41°0
61 °
Westby, Tuesday, 20 October
Clear. High 61°, low 41°.
Pressure30.03 inHg
Wind10.4 mph SE
Humidity70%
Visibility—
Dew point44°
Wed, 2168° / 48°0
68 °
Westby, Wednesday, 21 October
Partly cloudy. High 68°, low 48°.
Pressure29.85 inHg
Wind10.2 mph SE
Humidity52%
Visibility—
Dew point43°
Thu, 2271° / 55°0.01
71 °
Westby, Thursday, 22 October
Light rain. High 71°, low 55°.
Pressure29.62 inHg
Wind10 mph SE
Humidity54%
Visibility—
Dew point48°
Fri, 2355° / 40°0.05
55 °
Westby, Friday, 23 October
Light rain. High 55°, low 40°.
Pressure29.77 inHg
Wind26.8 mph NW
Humidity78%
Visibility—
Dew point42°
Sat, 2440° / 33°0.16
40 °
Westby, Saturday, 24 October
Snow. High 40°, low 33°.
Pressure30.15 inHg
Wind29.3 mph NW
Humidity60%
Visibility—
Dew point24°
Sun, 2540° / 29°0
40 °
Westby, Sunday, 25 October
Clear. High 40°, low 29°.
Pressure30.36 inHg
Wind17.6 mph NW
Humidity41%
Visibility—
Dew point15°
Mon, 2641° / 29°0
41 °
Westby, Monday, 26 October
Overcast. High 41°, low 29°.
Pressure30.42 inHg
Wind3.8 mph NE
Humidity42%
Visibility—
Dew point16°
Tue, 2746° / 36°0.01
46 °
Westby, Tuesday, 27 October
Light rain. High 46°, low 36°.
Pressure30.03 inHg
Wind12.8 mph NW
Humidity65%
Visibility—
Dew point33°
Wed, 2840° / 35°0.23
40 °
Westby, Wednesday, 28 October
Snow. High 40°, low 35°.
Pressure30.06 inHg
Wind6.9 mph SE
Humidity99%
Visibility—
Dew point36°
Thu, 2936° / 18°0
36 °
Westby, Thursday, 29 October
Overcast. High 36°, low 18°.
Pressure30.45 inHg
Wind13.6 mph NE
Humidity77%
Visibility—
Dew point22°
Fri, 3034° / 18°0
34 °
Westby, Friday, 30 October
Mostly clear. High 34°, low 18°.
Pressure30.59 inHg
Wind13.5 mph SE
Humidity53%
Visibility—
Dew point13°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3145° / 29°0.03
45 °
Westby, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.03 in
Chance of precipitation17%
Record high70° (1990)
Record low3° (2023)
Sun, 0144° / 29°0.04
44 °
Westby, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.04 in
Chance of precipitation18%
Record high65° (1983)
Record low-6° (1984)
Mon, 0243° / 28°0.04
43 °
Westby, Monday, 2 November
Climate normal for this date — 60-year average.
Average high43°
Average low28°
Average precipitation0.04 in
Chance of precipitation15%
Record high70° (1965)
Record low-2° (1984)
Tue, 0342° / 28°0.02
42 °
Westby, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high42°
Average low28°
Average precipitation0.02 in
Chance of precipitation15%
Record high64° (2020)
Record low-5° (1991)
Wed, 0443° / 28°0.03
43 °
Westby, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high43°
Average low28°
Average precipitation0.03 in
Chance of precipitation22%
Record high65° (1975)
Record low7° (1973)
Thu, 0542° / 27°0.03
42 °
Westby, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high42°
Average low27°
Average precipitation0.03 in
Chance of precipitation17%
Record high69° (2020)
Record low1° (2003)
Fri, 0641° / 25°0.02
41 °
Westby, Friday, 6 November
Climate normal for this date — 60-year average.
Average high41°
Average low25°
Average precipitation0.02 in
Chance of precipitation15%
Record high63° (2009)
Record low-7° (1991)
Sat, 0741° / 25°0.02
41 °
Westby, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high41°
Average low25°
Average precipitation0.02 in
Chance of precipitation17%
Record high66° (1999)
Record low-4° (2003)
Sun, 0839° / 25°0.04
39 °
Westby, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high39°
Average low25°
Average precipitation0.04 in
Chance of precipitation20%
Record high65° (1999)
Record low2° (2000)
Mon, 0936° / 22°0.03
36 °
Westby, Monday, 9 November
Climate normal for this date — 60-year average.
Average high36°
Average low22°
Average precipitation0.03 in
Chance of precipitation22%
Record high64° (2016)
Record low-1° (2003)
Tue, 1036° / 22°0.03
36 °
Westby, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high36°
Average low22°
Average precipitation0.03 in
Chance of precipitation18%
Record high60° (1989)
Record low-3° (1986)
Wed, 1136° / 21°0.02
36 °
Westby, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high36°
Average low21°
Average precipitation0.02 in
Chance of precipitation17%
Record high57° (1999)
Record low-6° (1995)
Thu, 1236° / 21°0.02
36 °
Westby, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high36°
Average low21°
Average precipitation0.02 in
Chance of precipitation13%
Record high68° (1999)
Record low-3° (1986)
Fri, 1338° / 22°0.02
38 °
Westby, Friday, 13 November
Climate normal for this date — 60-year average.
Average high38°
Average low22°
Average precipitation0.02 in
Chance of precipitation15%
Record high62° (1999)
Record low-11° (1986)
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 Westby, 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 Westby, 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.