Cottage Grove, OR Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Cottage Grove's primary NOAA station, COTTAGE GROVE 2E.
The climate verdict for Cottage Grove
Water is the standout signal in Cottage Grove, Oregon: 46.5 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 52°F. Its climate comfort score of 73/100 (good) lands mid-pack nationally, exceeding 66% of station-mapped location scores.
- 52°F
- yearly average temperature, NOAA normal
- 73/100
- comfort score, above 66% of station-mapped location scores
- 46.5"
- annual precipitation · 3" snow
- 184 days
- growing season, frost-free days
Cottage Grove: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00351897 · Cottage Grove, OR 52°F mean · 46.5" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-NARROW · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 52°F
- RANK-MID #3,431
- PHOTO-FINISH ≈ Corvallis
- PRCP-MID 46.5"
- SWING-NARROW 27°F
- COMF-MID 73/100
- LOAD-HEAT 4,854 HDD
- STN-1 USC00351897
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Corvallis, OR ( -0.1 °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.
- Cottage Grove (this station) 52°F
- Cold Corvallis, OR 52°F
- Hot Foster Dam, OR 52°F
- Near Cottage Grove D…, OR 52°F
- Near Idleyld Park, OR 52°F
Climate Living Index · Cottage Grove
Cottage Grove: 70/100 · grade B
Cottage Grove publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Cottage Grove, not an official NOAA rating. Rankings still use Comfort Score 73/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Snowfall burden | 2.7 inches/year | 74/100 · B |
| Precipitation balance | 46.5 in · 11.5 from 35 in | 60/100 · C |
| Frost-free season | 184 days/year | 53/100 · D |
| Annual temperature balance | 52.3°F · 15.2° from 67.5°F | 50/100 · D |
Cottage Grove · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Cottage Grove is a temperate Köppen climate: Csb
Coldest-month mean 40.0°F and warmest-month mean 66.6°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
- 66.6°F
- Coldest month
- 40.0°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 Cottage Grove sits across the climate record
Three NOAA fields for Cottage Grove's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 50th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 28% wettest
- Cottage Grove'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 Cottage Grove is compact versus 6,861 complete station-years.
How Cottage Grove compares across U.S. station-mapped locations
Cottage Grove's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
73 Top 34% score exceeds 66% 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%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). This entry sits in this band.
- 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
Cottage Grove's measured station temperature trend
MethodologyAcross 86 complete annual observations from 1918 to 2024, COTTAGE GROVE 2E warmed at a fitted rate of 0.10°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Cottage Grove primary station fitted change +0.09 °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 | 48°F (9°C) | 33°F (1°C) | 41°F (5°C) | 6.6" | 0.9" | 12.3 | 0.0 |
| February | 52°F (11°C) | 34°F (1°C) | 43°F (6°C) | 4.9" | 1.1" | 11.3 | 0.0 |
| March | 56°F (13°C) | 35°F (2°C) | 46°F (8°C) | 5.2" | 0.3" | 9.3 | 0.0 |
| April | 61°F (16°C) | 38°F (3°C) | 50°F (10°C) | 4.5" | 0.0" | 3.3 | 0.0 |
| May | 68°F (20°C) | 44°F (6°C) | 56°F (13°C) | 3.1" | 0.0" | 0.4 | 0.3 |
| June | 73°F (23°C) | 48°F (9°C) | 61°F (16°C) | 1.7" | 0.0" | 0.0 | 1.6 |
| July | 82°F (28°C) | 51°F (11°C) | 67°F (19°C) | 0.4" | 0.0" | 0.0 | 6.2 |
| August | 83°F (28°C) | 50°F (10°C) | 67°F (19°C) | 0.5" | 0.0" | 0.0 | 5.9 |
| September | 77°F (25°C) | 46°F (8°C) | 61°F (16°C) | 1.5" | 0.0" | 0.2 | 2.1 |
| October | 64°F (18°C) | 41°F (5°C) | 53°F (11°C) | 3.8" | 0.0" | 2.1 | 0.1 |
| November | 53°F (12°C) | 37°F (3°C) | 45°F (7°C) | 6.8" | 0.0" | 7.3 | 0.0 |
| December | 47°F (8°C) | 33°F (1°C) | 40°F (4°C) | 7.6" | 0.4" | 12.9 | 0.0 |
The year, day by day
The calendar barely moves in Cottage Grove: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 33°F near December 22 and 84°F near July 29.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 33°F around December 22.
Where the wet dates fall
The likeliest wet date is November 26, when 72% of years recorded at least a hundredth of an inch. The driest is July 27 at 7%. Summed across the calendar, that is about 170 wet dates a year.
The widest day
August 4 carries the biggest normal gap between afternoon and dawn, 32°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Cottage Grove.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 0.9"
21.1 days with precipitation
Snow: 1.1"
18.3 days with precipitation
Snow: 0.3"
20.4 days with precipitation
18.4 days with precipitation
12.7 days with precipitation
8.9 days with precipitation
2.5 days with precipitation
2.8 days with precipitation
6.2 days with precipitation
15.6 days with precipitation
21.4 days with precipitation
Snow: 0.4"
21.8 days with precipitation
Cottage Grove's wet season runs through the cold months
December, January and February carry 41% of the year's precipitation here, while June through August contribute 6%. 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 26.6°F seasonal spread.
- Wettest month
- December, 7.6"
- Driest month
- July, 0.4"
- Wettest three months
- December, November, January (45% 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.
How Cottage Grove's precipitation splits across the calendar
About 170 days a year record measurable precipitation here, carrying 46.5" between them, or roughly 0.27 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Snow reaches Cottage Grove, but rarely amounts to much
The normals record 2.7 inches of snow a year here, most likely in February. 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 2 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 25
50% probability date
Last Spring Freeze
April 24
50% probability date
Growing Season
184 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,854
Higher = more heating needed
Cooling Degree Days
225
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside OR closest to Cottage Grove 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 (52°F here).
- Albany, MO 52°F · 0.0°F off
- Avondale, PA 52°F · 0.0°F off
- Benkelman, NE 52°F · 0.0°F off
- Bremerton, WA 52°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (46.5" here), excluding temperature-peer places.
- Mineola, TX 46.5" · 0.0" off
- Hot Springs, VA 46.5" · 0.0" off
- Sulphur Springs, TX 46.5" · 0.0" off
- Monett, MO 46.4" · 0.0" off
Data-derived climate profile
How Cottage Grove's climate pattern fits together
heating led · wet · low swing
Heating is the larger measured load in Cottage Grove, at 4,854 degree days versus 225 for cooling. Unlike a strongly continental record, however, its 26.6°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Cottage Grove's frost-free season lasts about 184 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
Cottage Grove's 26.6°F seasonal spread is compact even though precipitation is abundant. July and December mark the typical warm and cold ends of the calendar. The annual average is 52°F. Temperature is relatively steady; the monthly rows show how rain and snow observations vary across the calendar.
Alongside its heating load, Cottage Grove carries 46.5 inches of precipitation in a normal year, inside PlainClimate's wet range. Annual snowfall totals 2.7 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 Cottage Grove'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 Cottage Grove, not an official NOAA class or a year-ahead forecast.
Questions about Cottage Grove's climate
How much rain does Cottage Grove get? ▼
How much energy does heating and cooling require in Cottage Grove? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Cottage Grove's primary station: COTTAGE GROVE 2E (USC00351897). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 4115950). Match rule for Cottage Grove: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Cottage Grove 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.