Monthly outlook for Corvallis, MT: average high 51.8°, average low 36.2°. That is 1.8° above the climate normal for October. Precipitation is expected on 9 days (about 1.1 inches), against a normal of 6 days and 1.2 inches. The warmest day looks like 9 November (63.5°), the coolest 29 October (30.8°).
51.8°/36.2°
Average high / low
+1.8°
Above normal
9 / 6
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
50.1°
50°
+0.1°
4 November – 13 November
54.5°
45.2°
+5.2°
14 November – 23 November
at normal
40.2°
—
October records over 66 years
88.3°3 October 2010All-time high
-5.4°26 October 2020All-time low
Mon, 2651° / 35°0.21
51 °
Corvallis, Monday, 26 October
Rain. High 51°, low 35°.
Pressure30.03 inHg
Wind0.6 mph W
Humidity61%
Visibility6.2 mi
Dew point33°
Tue, 2748° / 38°0.06
48 °
Corvallis, Tuesday, 27 October
Rain. High 48°, low 38°.
Pressure29.97 inHg
Wind7.6 mph S
Humidity60%
Visibility6.2 mi
Dew point32°
Wed, 2848° / 35°0.07
48 °
Corvallis, Wednesday, 28 October
Light rain. High 48°, low 35°.
Pressure29.97 inHg
Wind7.4 mph S
Humidity60%
Visibility6.2 mi
Dew point32°
Thu, 2948° / 31°0.14
48 °
Corvallis, Thursday, 29 October
Snow. High 48°, low 31°.
Pressure30.06 inHg
Wind2.4 mph N
Humidity66%
Visibility—
Dew point30°
Fri, 3049° / 34°0
49 °
Corvallis, Friday, 30 October
Partly cloudy. High 49°, low 34°.
Pressure30.00 inHg
Wind2.2 mph NE
Humidity62%
Visibility—
Dew point29°
Sat, 3154° / 35°0
54 °
Corvallis, Saturday, 31 October
Overcast. High 54°, low 35°.
Pressure29.97 inHg
Wind2.7 mph N
Humidity57%
Visibility—
Dew point32°
Sun, 0153° / 39°0.07
53 °
Corvallis, Sunday, 1 November
Light rain. High 53°, low 39°.
Pressure29.74 inHg
Wind3.8 mph N
Humidity72%
Visibility—
Dew point39°
Mon, 0247° / 34°0.3
47 °
Corvallis, Monday, 2 November
Snow. High 47°, low 34°.
Pressure30.00 inHg
Wind10 mph W
Humidity54%
Visibility—
Dew point30°
Tue, 0352° / 34°0
52 °
Corvallis, Tuesday, 3 November
Overcast. High 52°, low 34°.
Pressure30.24 inHg
Wind6.1 mph S
Humidity41%
Visibility—
Dew point23°
Wed, 0455° / 36°0
55 °
Corvallis, Wednesday, 4 November
Overcast. High 55°, low 36°.
Pressure29.94 inHg
Wind4.1 mph S
Humidity46%
Visibility—
Dew point27°
Thu, 0558° / 38°0
58 °
Corvallis, Thursday, 5 November
Overcast. High 58°, low 38°.
Pressure29.80 inHg
Wind6 mph S
Humidity41%
Visibility—
Dew point27°
Fri, 0653° / 39°0.06
53 °
Corvallis, Friday, 6 November
Light rain. High 53°, low 39°.
Pressure29.41 inHg
Wind7.8 mph S
Humidity65%
Visibility—
Dew point37°
Sat, 0749° / 37°0.07
49 °
Corvallis, Saturday, 7 November
Snow. High 49°, low 37°.
Pressure29.77 inHg
Wind6.9 mph SW
Humidity70%
Visibility—
Dew point36°
Sun, 0849° / 36°0.09
49 °
Corvallis, Sunday, 8 November
Light rain. High 49°, low 36°.
Pressure29.97 inHg
Wind6.9 mph S
Humidity61%
Visibility—
Dew point34°
Mon, 0964° / 44°0
64 °
Corvallis, Monday, 9 November
Partly cloudy. High 64°, low 44°.
Pressure30.00 inHg
Wind8.2 mph S
Humidity67%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1043° / 26°0.05
43 °
Corvallis, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.05 in
Chance of precipitation28%
Record high66° (2025)
Record low-12° (1986)
Wed, 1143° / 26°0.06
43 °
Corvallis, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.06 in
Chance of precipitation32%
Record high63° (2016)
Record low-10° (2000)
Thu, 1244° / 26°0.07
44 °
Corvallis, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high44°
Average low26°
Average precipitation0.07 in
Chance of precipitation38%
Record high67° (1999)
Record low-3° (1985)
Fri, 1343° / 26°0.08
43 °
Corvallis, Friday, 13 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.08 in
Chance of precipitation43%
Record high65° (1999)
Record low-3° (2000)
Sat, 1442° / 26°0.07
42 °
Corvallis, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.07 in
Chance of precipitation42%
Record high65° (1999)
Record low-2° (1982)
Sun, 1543° / 24°0.03
43 °
Corvallis, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high43°
Average low24°
Average precipitation0.03 in
Chance of precipitation15%
Record high63° (2021)
Record low2° (2000)
Mon, 1642° / 25°0.06
42 °
Corvallis, Monday, 16 November
Climate normal for this date — 60-year average.
Average high42°
Average low25°
Average precipitation0.06 in
Chance of precipitation40%
Record high59° (2001)
Record low-6° (1961)
Tue, 1741° / 26°0.07
41 °
Corvallis, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high41°
Average low26°
Average precipitation0.07 in
Chance of precipitation48%
Record high57° (2008)
Record low-1° (1961)
Wed, 1840° / 24°0.08
40 °
Corvallis, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high40°
Average low24°
Average precipitation0.08 in
Chance of precipitation47%
Record high59° (2008)
Record low-6° (2022)
Thu, 1940° / 22°0.08
40 °
Corvallis, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high40°
Average low22°
Average precipitation0.08 in
Chance of precipitation37%
Record high51° (1987)
Record low-5° (1975)
Fri, 2040° / 23°0.07
40 °
Corvallis, Friday, 20 November
Climate normal for this date — 60-year average.
Average high40°
Average low23°
Average precipitation0.07 in
Chance of precipitation43%
Record high54° (1966)
Record low-6° (1975)
Sat, 2139° / 21°0.06
39 °
Corvallis, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high39°
Average low21°
Average precipitation0.06 in
Chance of precipitation33%
Record high55° (2018)
Record low-8° (1977)
Sun, 2238° / 20°0.08
38 °
Corvallis, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high38°
Average low20°
Average precipitation0.08 in
Chance of precipitation42%
Record high57° (2021)
Record low-12° (2007)
Mon, 2337° / 19°0.06
37 °
Corvallis, Monday, 23 November
Climate normal for this date — 60-year average.
Average high37°
Average low19°
Average precipitation0.06 in
Chance of precipitation38%
Record high61° (2017)
Record low-17° (1985)
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 Corvallis, 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 Corvallis, 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.