Oregon City, 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 Oregon City's primary NOAA station, OREGON CITY.
The climate verdict for Oregon City
A compact 29°F seasonal swing gives Oregon City, Oregon a steadier-than-extreme annual shape. NOAA reports an annual average of 55°F. It scores 85/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 85% of them.
- 55°F
- yearly average temperature, NOAA normal
- 85/100
- comfort score, above 85% of station-mapped location scores
- 44.8"
- annual precipitation
- 245 days
- frost-free growing season
Oregon City: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00356334 · Oregon City, OR 55°F mean · 44.8" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-NARROW · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 55°F
- RANK-UPPER #4,254
- PHOTO-FINISH ≈ Portland
- PRCP-MID 44.8"
- SWING-NARROW 29°F
- COMF-TOP 85/100
- LOAD-HEAT 4,015 HDD
- STN-1 USC00356334
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Portland, OR ( -0.3 °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.
- Hot Roseburg Rgnl, OR 56°F
- Near Kitt Peak, AZ 56°F
- Near Covelo, CA 56°F
- Oregon City (this station) 55°F
- Cold Portland, OR 55°F
Climate Living Index · Oregon City
Oregon City: 78/100 · grade B
Oregon City publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Oregon City, not an official NOAA rating. Rankings still use Comfort Score 85/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Frost-free season | 245 days/year | 87/100 · A |
| Precipitation balance | 44.8 in · 9.8 from 35 in | 65/100 · C |
| Annual temperature balance | 55.4°F · 12.1° from 67.5°F | 61/100 · C |
Oregon City · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Oregon City is a temperate Köppen climate: Csb
Coldest-month mean 41.8°F and warmest-month mean 70.8°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
- 70.8°F
- Coldest month
- 41.8°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 Oregon City sits across the climate record
Three NOAA fields for Oregon City's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 62nd percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 68th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 92%
- Warmest-to-coldest month gap for Oregon City is compact versus 6,861 complete station-years.
How Oregon City compares across U.S. station-mapped locations
Oregon City's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
85 Top 15% score exceeds 85% 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%). Below this entry.
- 80–90: 921 station-mapped locations (15%). This entry sits in this band.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Oregon City's measured station temperature trend
MethodologyAcross 46 complete annual observations from 1949 to 2017, OREGON CITY warmed at a fitted rate of 0.19°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Oregon City primary station fitted change +0.19 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 48°F (9°C) | 37°F (3°C) | 43°F (6°C) | 6.5" | 8.1 | 0.0 |
| February | 53°F (11°C) | 38°F (3°C) | 45°F (7°C) | 4.5" | 5.9 | 0.0 |
| March | 58°F (14°C) | 40°F (4°C) | 49°F (9°C) | 4.8" | 2.6 | 0.0 |
| April | 64°F (18°C) | 43°F (6°C) | 53°F (12°C) | 3.8" | 0.6 | 0.0 |
| May | 71°F (22°C) | 48°F (9°C) | 60°F (15°C) | 2.5" | 0.0 | 0.8 |
| June | 76°F (25°C) | 53°F (12°C) | 65°F (18°C) | 1.8" | 0.0 | 2.5 |
| July | 84°F (29°C) | 57°F (14°C) | 71°F (21°C) | 0.5" | 0.0 | 7.3 |
| August | 84°F (29°C) | 58°F (14°C) | 71°F (22°C) | 0.6" | 0.0 | 7.0 |
| September | 78°F (26°C) | 53°F (12°C) | 65°F (19°C) | 1.6" | 0.0 | 2.7 |
| October | 65°F (18°C) | 47°F (8°C) | 56°F (13°C) | 4.2" | 0.5 | 0.1 |
| November | 53°F (12°C) | 41°F (5°C) | 47°F (8°C) | 6.7" | 4.0 | 0.0 |
| December | 47°F (8°C) | 36°F (2°C) | 42°F (5°C) | 7.2" | 8.2 | 0.0 |
The year, day by day
The calendar barely moves in Oregon City: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 36°F near December 23 and 86°F near July 27.
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 December 23.
The widest day
July 25 carries the biggest normal gap between afternoon and dawn, 28°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Oregon City.
Monthly Precipitation
Average monthly rainfall
Oregon City'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 29°F seasonal spread.
- Wettest month
- December, 7.2"
- Driest month
- July, 0.5"
- Wettest three months
- December, November, January (46% 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.
Frost Dates & Growing Season
First Fall Freeze
November 18
50% probability date
Last Spring Freeze
March 18
50% probability date
Growing Season
245 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,015
Higher = more heating needed
Cooling Degree Days
543
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside OR closest to Oregon City 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 (55°F here).
- Appleton City, MO 55°F · 0.0°F off
- Danville, KY 55°F · 0.0°F off
- Erwin, TN 55°F · 0.0°F off
- Greenwood, DE 55°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (44.8" here), excluding temperature-peer places.
- Eldon, MO 44.8" · 0.0" off
- Athens, TX 44.8" · 0.1" off
- Northfield, VT 44.7" · 0.1" off
- Island Pond, VT 44.9" · 0.1" off
Data-derived climate profile
How Oregon City's climate pattern fits together
heating led · moderate · low swing
Heating is the larger measured load in Oregon City, at 4,015 degree days versus 543 for cooling. Unlike a strongly continental record, however, its 29.0°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 245 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.
Temperature varies within a narrow 29.0°F band across the normal year. August and December mark the typical warm and cold ends of the calendar. The annual average is 55°F. Monthly rows still matter, but they refine a steady profile rather than reveal two climatic extremes.
Oregon City's 44.8 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Oregon City'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 Oregon City, not an official NOAA class or a year-ahead forecast.
Questions about Oregon City's climate
How much rain does Oregon City get? ▼
How much energy does heating and cooling require in Oregon City? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Oregon City's primary station: OREGON CITY (USC00356334). 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 4155200). Match rule for Oregon City: 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 Oregon City 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.