Corvallis Water Bureau, OR Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Corvallis Water Bureau's primary NOAA station, CORVALLIS WATER BUREAU.
The climate verdict for Corvallis Water Bureau
Water is the standout signal in Corvallis Water Bureau, Oregon: 68.8 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 50°F. At 44/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 10% of scores.
- 50°F
- yearly average temperature, NOAA normal
- 44/100
- comfort score, above 10% of station-mapped location scores
- 68.8"
- annual precipitation · 5" snow
- 146 days
- growing season, frost-free days
Corvallis Water Bureau: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00351877 · Corvallis Water Bureau, OR 50°F mean · 68.8" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-WET · SWING-NARROW · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 50°F
- RANK-COOL #2,676
- PHOTO-FINISH ≈ Darrington
- PRCP-WET 68.8"
- SWING-NARROW 27°F
- COMF-LOW 44/100
- LOAD-HEAT 5,667 HDD
- STN-1 USC00351877
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Darrington, WA (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every OR station list.
- Corvallis Water… (this station) 50°F
- Cold Monroe, WA 50°F
- Hot Mud Mtn Dam, WA 50°F
- Near Darrington, WA 50°F
- Near Baring, WA 50°F
Climate Living Index · Corvallis Water Bureau
Corvallis Water Bureau: 35/100 · grade F
Corvallis Water Bureau publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Corvallis Water Bureau, not an official NOAA rating. Rankings still use Comfort Score 44/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 5.3 inches/year | 70/100 · B |
| Normal heat + freeze calendar | 156 calendar days | 42/100 · D |
| Annual temperature balance | 49.8°F · 17.7° from 67.5°F | 39/100 · F |
| Frost-free season | 146 days/year | 22/100 · F |
| Precipitation balance | 68.8 in · 33.8 from 35 in | 0/100 · F |
Corvallis Water Bureau · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Corvallis Water Bureau is a temperate Köppen climate: Csb
Coldest-month mean 37.2°F and warmest-month mean 64.3°F place this station in temperate, dry-summer, warm summer climates (Csb). Class Csb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, warm summer.
- Köppen code
- Csb
- Group
- Temperate
- Warmest month
- 64.3°F
- Coldest month
- 37.2°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Corvallis Water Bureau sits across the climate record
Three NOAA fields for Corvallis Water Bureau's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 39th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 2% wettest
- Corvallis Water Bureau's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 93%
- Warmest-to-coldest month gap for Corvallis Water Bureau is compact versus 6,861 complete station-years.
How Corvallis Water Bureau compares across U.S. station-mapped locations
Corvallis Water Bureau's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 10th percentile score exceeds 10% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). This entry sits in this band.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Corvallis Water Bureau's measured station temperature trend
MethodologyAcross 41 complete annual observations from 1964 to 2023, CORVALLIS WATER BUREAU warmed at a fitted rate of 0.15°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Corvallis Water Bureau primary station fitted change +0.15 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 47°F (8°C) | 28°F (-2°C) | 38°F (3°C) | 11.3" | 2.0" | 17.2 | 0.0 |
| February | 51°F (11°C) | 28°F (-2°C) | 40°F (4°C) | 8.4" | 1.7" | 15.8 | 0.0 |
| March | 56°F (13°C) | 31°F (-1°C) | 43°F (6°C) | 8.1" | 0.5" | 11.6 | 0.0 |
| April | 61°F (16°C) | 33°F (1°C) | 47°F (8°C) | 5.4" | 0.0" | 5.7 | 0.0 |
| May | 69°F (21°C) | 39°F (4°C) | 54°F (12°C) | 2.8" | 0.0" | 1.2 | 0.3 |
| June | 74°F (23°C) | 43°F (6°C) | 58°F (15°C) | 1.5" | 0.0" | 0.1 | 1.3 |
| July | 82°F (28°C) | 46°F (8°C) | 64°F (18°C) | 0.3" | 0.0" | 0.0 | 5.3 |
| August | 83°F (28°C) | 46°F (8°C) | 64°F (18°C) | 0.4" | 0.0" | 0.0 | 5.5 |
| September | 77°F (25°C) | 42°F (6°C) | 60°F (16°C) | 1.8" | 0.0" | 0.1 | 2.0 |
| October | 65°F (18°C) | 36°F (2°C) | 51°F (10°C) | 5.0" | 0.0" | 3.8 | 0.0 |
| November | 53°F (12°C) | 31°F (-1°C) | 42°F (5°C) | 10.4" | 0.2" | 11.9 | 0.0 |
| December | 46°F (8°C) | 28°F (-2°C) | 37°F (3°C) | 13.4" | 0.9" | 15.8 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 85°F around July 28, short of 90°F on every date, while 156 dates carry a normal low at or below freezing, the coldest 28°F near January 28.
The freezing stretch
The normal low stays at or below 32°F into April 9, then returns to freezing around November 6, covering 156 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is November 25, when 71% of years recorded at least a hundredth of an inch. The driest is July 31 at 8%. Summed across the calendar, that is about 174 wet dates a year.
The widest day
July 28 carries the biggest normal gap between afternoon and dawn, 38°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Corvallis Water Bureau.
Where Corvallis Water Bureau Stands Nationally
This is one of the wettest normals climates ranked: about 69 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 38°F, sharper than nine in ten ranked stations see.
Corvallis Water Bureau earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 2.0"
21.0 days with precipitation
Snow: 1.7"
18.3 days with precipitation
Snow: 0.5"
21.0 days with precipitation
19.1 days with precipitation
13.8 days with precipitation
9.4 days with precipitation
3.1 days with precipitation
3.1 days with precipitation
7.1 days with precipitation
14.6 days with precipitation
Snow: 0.2"
21.3 days with precipitation
Snow: 0.9"
21.4 days with precipitation
Corvallis Water Bureau's wet season runs through the cold months
December, January and February carry 48% of the year's precipitation here, while June through August contribute 3%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows an unusually narrow 27.1°F seasonal spread.
- Wettest month
- December, 13.4"
- Driest month
- July, 0.3"
- Wettest three months
- December, January, November (51% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
When it rains in Corvallis Water Bureau, it arrives in quantity
68.8" of precipitation falls across only about 173 wet days here, averaging 0.40 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 173 a year, 47% of all days
- Average depth per wet day
- 0.40 inches
- Most wet days
- December, about 21
- Fewest wet days
- July, about 3
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Snow reaches Corvallis Water Bureau, but rarely amounts to much
The normals record 5.3 inches of snow a year here, most likely in January. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 3 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
October 8
50% probability date
Last Spring Freeze
May 15
50% probability date
Growing Season
146 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,667
Higher = more heating needed
Cooling Degree Days
139
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside OR closest to Corvallis Water Bureau on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (50°F here).
- Allerton, IA 50°F · 0.0°F off
- Blowing Rock, NC 50°F · 0.0°F off
- Boswell, IN 50°F · 0.0°F off
- Cambridge City, IN 50°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (68.8" here), excluding temperature-peer places.
- Fort Lauderdale, FL 68.8" · 0.0" off
- Robertsdale, AL 69.0" · 0.2" off
- Startup, WA 68.3" · 0.4" off
- Moss Bluff, LA 69.3" · 0.5" off
Data-derived climate profile
How Corvallis Water Bureau's climate pattern fits together
heating led · wet · low swing
Heating is the larger measured load in Corvallis Water Bureau, at 5,667 degree days versus 139 for cooling. Unlike a strongly continental record, however, its 27.1°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Only about 146 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
Corvallis Water Bureau's 27.1°F seasonal spread is compact even though precipitation is abundant. August and December mark the typical warm and cold ends of the calendar. The annual average is 50°F. Temperature is relatively steady; the monthly rows show how rain and snow observations vary across the calendar.
Alongside its heating load, Corvallis Water Bureau carries 68.8 inches of precipitation in a normal year, inside PlainClimate's wet range. Annual snowfall totals 5.3 inches. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Corvallis Water Bureau's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Corvallis Water Bureau, not an official NOAA class or a year-ahead forecast.
Questions about Corvallis Water Bureau's climate
How much rain does Corvallis Water Bureau get? ▼
How much energy does heating and cooling require in Corvallis Water Bureau? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Corvallis Water Bureau's primary station: CORVALLIS WATER BUREAU (USC00351877). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Corvallis Water Bureau; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Corvallis Water Bureau comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.