Corvallis in Fall
In fall (September, October and November), Corvallis sees average daytime highs around 64°F and overnight lows near 45°F, with 11.9 in of precipitation over about 32 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 79°F in early September to 48°F by late November. The sky is clear or mostly clear about 34% of the time across fall, and the air most often feels dry.
Fall is Corvallis's 2nd-best season to visit on our travel score. For the whole year in context, see Corvallis's year-round climate.
- Avg daytime high
- 64°F
- 2nd-warmest season
- Avg overnight low
- 45°F
- Precipitation
- 11.9 in
- 32 wet days
- Avg wind
- 5 mph
- Travel score
- 5.3
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Corvallis in Fall
Over the season highs ease from about 79°F in early September to 48°F by late November.
A typical fall day in Corvallis reaches about 64°F and drops to 45°F overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Corvallis
Once humidity and wind are folded in, fall brings about 0 days that feel above 90°F and 1 that feel at or below 32°F.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
Corvallis weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 47° / 36° | 6.9 | 16.9 | 1.7 | 9 | 1.3 |
| Feb | 50° / 36° | 5.3 | 14.7 | 1.4 | 10.1 | 2.0 |
| Mar | 55° / 38° | 6.0 | 16.8 | 0.9 | 11.6 | 2.8 |
| Apr | 59° / 41° | 4.4 | 15.2 | 0.1 | 13.2 | 3.9 |
| May | 66° / 46° | 2.8 | 10.3 | 0 | 14.6 | 5.9 |
| Jun | 72° / 50° | 1.4 | 6.3 | 0 | 15.3 | 7.3 |
| Jul | 81° / 55° | 0.3 | 1.8 | 0 | 15 | 8.0 |
| Aug | 82° / 55° | 0.4 | 2.2 | 0 | 13.9 | 7.8 |
| Sep | 76° / 51° | 1.4 | 4.6 | 0 | 12.3 | 8.0 |
| Oct | 64° / 44° | 3.8 | 10.7 | 0 | 10.7 | 5.6 |
| Nov | 52° / 39° | 6.8 | 16.5 | 0.2 | 9.4 | 2.3 |
| Dec | 46° / 35° | 8.1 | 17.2 | 1.3 | 8.7 | 1.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 34% of the time across fall.
Chance of precipitation in Fall
Corvallis gets around 11.9 in of rain and snow over 32 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 5 mph across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 h 06 min in early September to 8 h 54 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.0 kWh/m².
Hazard calendar for Corvallis
In fall, Corvallis overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Corvallis's rainy season runs October–April, when most of the year's rain falls.
Is fall a good time to visit Corvallis?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Corvallis for sightseeing.
What to pack for Corvallis in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Corvallis sees daytime highs around 64°F and nights near 45°F. Pack a warm layer and rain gear. Worth having: light clothes and sun protection. About 32 days see rain.
Sea temperature near Corvallis in Fall
The nearest coast averages about 54°F across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 43 mi away) is warmest in July at about 56°F and coldest in February near 50°F.
The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 50 | 50 | 50 | 51 | 54 | 56 | 56 | 56 | 56 | 55 | 53 | 51 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 50 | Bracing |
| Feb | 50 | Bracing |
| Mar | 50 | Bracing |
| Apr | 51 | Bracing |
| May | 54 | Bracing |
| Jun | 56 | Bracing |
| Jul | 56 | Bracing |
| Aug | 56 | Bracing |
| Sep | 56 | Bracing |
| Oct | 55 | Bracing |
| Nov | 53 | Bracing |
| Dec | 51 | Bracing |
UV index in Corvallis in Fall
Clear-sky midday UV across fall averages around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Corvallis peaks around July 16 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 5 | 8 | 7 | 8 | 7 | 5 | 4 | 1 | 1 |
| Level | Low | Low | Moderate | High | Very high | Very high | Very high | Very high | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 8 | Very high |
| Jun | 7 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | Very high |
| Sep | 5 | Moderate |
| Oct | 4 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Corvallis in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Corvallis is worst in September — around 40 µg/m³ PM2.5 (poor), about 7.1× the cleanest month (January, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 6 | 8 | 10 | 11 | 11 | 8 | 8 | 16 | 40 | 11 | 11 | 9 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Poor | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 6 | Good |
| Feb | 8 | Good |
| Mar | 10 | Good |
| Apr | 11 | Good |
| May | 11 | Good |
| Jun | 8 | Good |
| Jul | 8 | Good |
| Aug | 16 | Moderate |
| Sep | 40 | Poor |
| Oct | 11 | Good |
| Nov | 11 | Good |
| Dec | 9 | Good |
Where is Corvallis?
Corvallis sits at 44.6°N, 123.3°W, 233 ft above sea level, in United States. The nearest listed city is Albany, 9.3 mi away.
Topography around Corvallis
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Corvallis.
Within 2 miles, the terrain around Corvallis has only modest variations in elevation — a maximum elevation change of 262 ft around an average of 233 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,014 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,997 ft.
The land around Corvallis is covered by trees (42%) and artificial surfaces (26%) within 2 miles, trees (47%) and cropland (31%) within 10 miles, and trees (70%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Corvallis (44.5646°, -123.262°, elevation 233 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.