Monthly outlook for Corvallis, MT: average high 52.7°, average low 37.3°. That is 3.9° above the climate normal for October. Precipitation is expected on 3 days (about 0.3 inches), against a normal of 6 days and 1.1 inches. The warmest day looks like 9 November (66.7°), the coolest 12 November (31.1°).
52.7°/37.3°
Average high / low
+3.9°
Above normal
3 / 6
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
31 October – 9 November
53.6°
47°
+3.6°
10 November – 19 November
51.3°
42.3°
+5°
20 November – 29 November
at normal
36.8°
—
October records over 66 years
88.3°3 October 2010All-time high
-5.4°26 October 2020All-time low
Sun, 0144° / 33°0.1
44 °
Corvallis, Sunday, 1 November
Snow. High 44°, low 33°.
Pressure29.94 inHg
Wind1 mph E
Humidity95%
Visibility6.2 mi
Dew point39°
Mon, 0247° / 33°0
47 °
Corvallis, Monday, 2 November
Overcast. High 47°, low 33°.
Pressure30.36 inHg
Wind2.1 mph SE
Humidity72%
Visibility6.2 mi
Dew point35°
Tue, 0355° / 35°0
55 °
Corvallis, Tuesday, 3 November
Overcast. High 55°, low 35°.
Pressure30.27 inHg
Wind1.7 mph SE
Humidity51%
Visibility6.2 mi
Dew point29°
Wed, 0454° / 38°0
54 °
Corvallis, Wednesday, 4 November
Clear. High 54°, low 38°.
Pressure30.12 inHg
Wind1.9 mph N
Humidity48%
Visibility—
Dew point29°
Thu, 0552° / 38°0
52 °
Corvallis, Thursday, 5 November
Overcast. High 52°, low 38°.
Pressure29.88 inHg
Wind2.5 mph S
Humidity57%
Visibility—
Dew point30°
Fri, 0653° / 37°0.1
53 °
Corvallis, Friday, 6 November
Snow. High 53°, low 37°.
Pressure29.83 inHg
Wind8.2 mph SW
Humidity69%
Visibility—
Dew point39°
Sat, 0753° / 32°0
53 °
Corvallis, Saturday, 7 November
Mostly clear. High 53°, low 32°.
Pressure30.33 inHg
Wind7.9 mph S
Humidity49%
Visibility—
Dew point27°
Sun, 0865° / 42°0
65 °
Corvallis, Sunday, 8 November
Clear. High 65°, low 42°.
Pressure30.24 inHg
Wind7 mph S
Humidity40%
Visibility—
Dew point31°
Mon, 0967° / 48°0
67 °
Corvallis, Monday, 9 November
Overcast. High 67°, low 48°.
Pressure30.15 inHg
Wind6.3 mph S
Humidity37%
Visibility—
Dew point32°
Tue, 1058° / 45°0
58 °
Corvallis, Tuesday, 10 November
Overcast. High 58°, low 45°.
Pressure30.12 inHg
Wind5.3 mph SW
Humidity57%
Visibility—
Dew point37°
Wed, 1149° / 35°0.1
49 °
Corvallis, Wednesday, 11 November
Light rain. High 49°, low 35°.
Pressure30.03 inHg
Wind7.1 mph SW
Humidity74%
Visibility—
Dew point40°
Thu, 1250° / 31°0
50 °
Corvallis, Thursday, 12 November
Clear. High 50°, low 31°.
Pressure30.36 inHg
Wind3.2 mph SW
Humidity49%
Visibility—
Dew point24°
Fri, 1355° / 33°0
55 °
Corvallis, Friday, 13 November
Overcast. High 55°, low 33°.
Pressure30.00 inHg
Wind4.4 mph S
Humidity27%
Visibility—
Dew point14°
Sat, 1452° / 41°0
52 °
Corvallis, Saturday, 14 November
Overcast. High 52°, low 41°.
Pressure29.91 inHg
Wind2.3 mph SW
Humidity45%
Visibility—
Dew point28°
Sun, 1544° / 43°0.02
44 °
Corvallis, Sunday, 15 November
Light rain. High 44°, low 43°.
Pressure30.00 inHg
Wind2.2 mph S
Humidity93%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Tue, 2437° / 21°0.11
37 °
Corvallis, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high37°
Average low21°
Average precipitation0.11 in
Chance of precipitation53%
Record high54° (1976)
Record low-13° (2010)
Wed, 2536° / 20°0.14
36 °
Corvallis, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high36°
Average low20°
Average precipitation0.14 in
Chance of precipitation53%
Record high51° (2017)
Record low-17° (1993)
Thu, 2635° / 19°0.07
35 °
Corvallis, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high35°
Average low19°
Average precipitation0.07 in
Chance of precipitation35%
Record high55° (2017)
Record low-9° (1993)
Fri, 2735° / 19°0.06
35 °
Corvallis, Friday, 27 November
Climate normal for this date — 60-year average.
Average high35°
Average low19°
Average precipitation0.06 in
Chance of precipitation42%
Record high54° (2021)
Record low-7° (2015)
Sat, 2836° / 20°0.08
36 °
Corvallis, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high36°
Average low20°
Average precipitation0.08 in
Chance of precipitation38%
Record high61° (2021)
Record low-7° (1979)
Sun, 2935° / 19°0.07
35 °
Corvallis, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high35°
Average low19°
Average precipitation0.07 in
Chance of precipitation38%
Record high48° (2021)
Record low-7° (1979)
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.