Detroit Dam, 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 Detroit Dam's primary NOAA station, DETROIT DAM.
The climate verdict for Detroit Dam
Water is the standout signal in Detroit Dam, Oregon: 93.6 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 53°F. At 52/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 24% of scores.
- 53°F
- annual average temperature (NOAA normal)
- 52/100
- comfort score, above 24% of station-mapped location scores
- 93.6"
- annual precipitation · 10" snow
- 269 days
- growing season, frost-free days
Detroit Dam: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00352292 · Detroit Dam, OR 53°F mean · 93.6" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-WET · SWING-NARROW · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 53°F
- RANK-MID #3,499
- PHOTO-FINISH ≈ Cougar
- PRCP-WET 93.6"
- SWING-NARROW 29°F
- COMF-LOW 52/100
- LOAD-HEAT 4,896 HDD
- STN-1 USC00352292
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Cougar, 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.
- Detroit Dam (this station) 53°F
- Hot Prospect, OR 53°F
- Near Cougar, WA 53°F
- Near Strawberry Vall…, CA 53°F
- Near Cascade Locks, OR 53°F
Climate Living Index · Detroit Dam
Detroit Dam: 63/100 · grade C
Detroit Dam publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Detroit Dam, not an official NOAA rating. Rankings still use Comfort Score 52/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Frost-free season | 269 days/year | 94/100 · A |
| Snowfall burden | 10.2 inches/year | 63/100 · C |
| Annual temperature balance | 52.5°F · 15.0° from 67.5°F | 51/100 · D |
| Precipitation balance | 93.6 in · 58.6 from 35 in | 0/100 · F |
Detroit Dam · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Detroit Dam is a temperate Köppen climate: Csb
Coldest-month mean 39.9°F and warmest-month mean 68.5°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
- 68.5°F
- Coldest month
- 39.9°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 Detroit Dam sits across the climate record
Three NOAA fields for Detroit Dam's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 51st percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 1% wettest
- Detroit Dam's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 92%
- Warmest-to-coldest month gap for Detroit Dam is compact versus 6,861 complete station-years.
How Detroit Dam compares across U.S. station-mapped locations
Detroit Dam's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
52 24th percentile score exceeds 24% 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%). This entry sits in this band.
- 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
Detroit Dam's measured station temperature trend
MethodologyAcross 55 complete annual observations from 1955 to 2025, DETROIT DAM warmed at a fitted rate of 0.11°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Detroit Dam primary station fitted change +0.11 °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 | 43°F (6°C) | 36°F (2°C) | 40°F (4°C) | 13.1" | 5.6" | 12.1 | 0.0 |
| February | 47°F (8°C) | 37°F (3°C) | 42°F (5°C) | 10.0" | 2.2" | 9.6 | 0.0 |
| March | 52°F (11°C) | 38°F (3°C) | 45°F (7°C) | 10.7" | 0.9" | 6.9 | 0.0 |
| April | 57°F (14°C) | 41°F (5°C) | 49°F (10°C) | 8.6" | 0.0" | 2.6 | 0.0 |
| May | 65°F (18°C) | 46°F (8°C) | 56°F (13°C) | 6.0" | 0.0" | 0.4 | 0.3 |
| June | 71°F (22°C) | 51°F (11°C) | 61°F (16°C) | 3.8" | 0.0" | 0.0 | 1.3 |
| July | 80°F (27°C) | 56°F (13°C) | 68°F (20°C) | 0.7" | 0.0" | 0.0 | 4.8 |
| August | 81°F (27°C) | 56°F (13°C) | 69°F (20°C) | 0.9" | 0.0" | 0.0 | 5.0 |
| September | 74°F (23°C) | 53°F (12°C) | 63°F (17°C) | 2.8" | 0.0" | 0.0 | 1.2 |
| October | 61°F (16°C) | 47°F (8°C) | 54°F (12°C) | 8.0" | 0.0" | 0.3 | 0.0 |
| November | 49°F (10°C) | 40°F (5°C) | 45°F (7°C) | 13.5" | 0.2" | 4.6 | 0.0 |
| December | 43°F (6°C) | 37°F (3°C) | 40°F (4°C) | 15.4" | 1.3" | 9.7 | 0.0 |
The year, day by day
The calendar barely moves in Detroit Dam: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 36°F near January 1 and 83°F near July 28.
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 36°F around January 1.
Where the wet dates fall
The likeliest wet date is April 5, when 68% of years recorded at least a hundredth of an inch. The driest is August 1 at 10%. Summed across the calendar, that is about 177 wet dates a year.
The widest day
July 24 carries the biggest normal gap between afternoon and dawn, 26°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Detroit Dam.
Where Detroit Dam Stands Nationally
This is one of the wettest normals climates ranked: about 94 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Detroit Dam earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 5.6"
20.4 days with precipitation
Snow: 2.2"
18.1 days with precipitation
Snow: 0.9"
20.5 days with precipitation
20.1 days with precipitation
16.0 days with precipitation
11.3 days with precipitation
4.1 days with precipitation
3.7 days with precipitation
7.2 days with precipitation
14.3 days with precipitation
Snow: 0.2"
19.5 days with precipitation
Snow: 1.3"
21.0 days with precipitation
Detroit Dam'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 28.6°F seasonal spread.
- Wettest month
- December, 15.4"
- Driest month
- July, 0.7"
- 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.
When it rains in Detroit Dam, it arrives in quantity
93.6" of precipitation falls across only about 176 wet days here, averaging 0.53 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 176 a year, 48% of all days
- Average depth per wet day
- 0.53 inches
- Most wet days
- December, about 21
- Fewest wet days
- August, about 4
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 Detroit Dam, but rarely amounts to much
The normals record 10.2 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 5 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
December 3
50% probability date
Last Spring Freeze
March 9
50% probability date
Growing Season
269 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,896
Higher = more heating needed
Cooling Degree Days
373
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside OR closest to Detroit Dam 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 (53°F here).
- Cameron, MO 53°F · 0.0°F off
- Cheraw, CO 53°F · 0.0°F off
- Chillicothe, MO 53°F · 0.0°F off
- Cougar, WA 53°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (93.6" here), excluding temperature-peer places.
- Hyder, AK 92.5" · 1.0" off
- Paauilo, HI 90.4" · 3.2" off
- Klawock, AK 89.2" · 4.4" off
- Highlands, NC 88.3" · 5.3" off
Data-derived climate profile
How Detroit Dam's climate pattern fits together
heating led · wet · low swing
Heating is the larger measured load in Detroit Dam, at 4,896 degree days versus 373 for cooling. Unlike a strongly continental record, however, its 28.6°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
The frost-free window extends for about 269 days. That is a long calendar measure, but it is not a forecast and does not combine heat, rainfall, soil, or local elevation into a planting recommendation.
Detroit Dam's 28.6°F seasonal spread is compact even though precipitation is abundant. August and January mark the typical warm and cold ends of the calendar. The annual average is 53°F. Temperature is relatively steady; the monthly rows show how rain and snow observations vary across the calendar.
Alongside its heating load, Detroit Dam carries 93.6 inches of precipitation in a normal year, inside PlainClimate's wet range. Annual snowfall totals 10.2 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 Detroit Dam'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 Detroit Dam, not an official NOAA class or a year-ahead forecast.
Questions about Detroit Dam's climate
How much rain does Detroit Dam get? ▼
How much energy does heating and cooling require in Detroit Dam? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Detroit Dam's primary station: DETROIT DAM (USC00352292). 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 Detroit Dam; 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 Detroit Dam 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.