Climate Comfort Score
82/100
Excellent
NOAA 1991–2020 normals 55°F annual avg Public-domain federal data
Oregon City, OR Climate
Explore average temperature, rainfall, and comfort score sourced from NOAA NCEI's 1991–2020 climate normals →
- 55°F
- Avg annual temp
- 82/100
- Comfort score
- 44.8"
- Annual precip
- 245d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Oregon City
Oregon City, Oregon averages 55°F a year and scores 82/100 on the comfort index - excellent, milder than 83% of U.S. cities.
- 55°F
- yearly average temperature, NOAA normal
- 82/100
- comfort score, milder than 83% of U.S. cities
- 44.8"
- annual precipitation
- 245 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
55°F (13°C)
Avg High
65°F
Avg Low
46°F
Annual Precip
44.8"
Comfort Score
82/100
Excellent
Avg Annual Temperature
55°F
30-year mean (NOAA NCEI)
Annual Precipitation
44.8"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Oregon City) 82.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Oregon City area.
How Oregon City compares to every U.S. city
Oregon City's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
82 Top 17% higher than 83% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Oregon City
MethodologyZooming out from Oregon City's own normal, the chart below shows how the U.S. land temperature anomaly has tracked the global mean since 1900 - the most recent decade sits warmer than the 30-year mean shown here.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
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 |
Monthly Precipitation
Average monthly rainfall
January 6.5"
February 4.5"
March 4.8"
April 3.8"
May 2.5"
June 1.8"
July 0.5"
August 0.6"
September 1.6"
October 4.2"
November 6.7"
December 7.2"
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
What Oregon City's climate means for you
Oregon City runs 55°F a year - peaking in August, coldest in December.
- Gardeners get about 245 frost-free days, with the last spring freeze near March 18 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,015 heating and 543 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Oregon City, OR
Based on station USC00356334 feeding NOAA's 1991–2020 climate normals, Oregon City, Oregon averages 55°F a year, ranging from a mean daily high of 65°F to a mean daily low of 46°F. August is typically the warmest month of the year, while December is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Anyone planning to live, garden, or travel in Oregon City should weigh precipitation alongside temperature: the annual average runs 44.8 inches, predominantly as rainfall. The frost-free season averages 245 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 18 and the first fall freeze near November 18. And on the energy front, 4,015 heating degree days and 543 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Oregon City scores 82/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above turn that into a planning tool: expect the mildest highs and lows in the shoulder seasons, August-driven heat at the peak of summer, and December-driven cold at the depth of winter. Every number here is a thirty-year average, not a forecast, so any given year can and does run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Oregon City, OR? ▼
The average annual temperature in Oregon City, Oregon is 55°F. The warmest month averages 84°F (29°C) and the coldest averages 36°F (2°C).
How much rain does Oregon City get? ▼
Oregon City receives 44.8 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Oregon City? ▼
Oregon City has a climate comfort score of 82/100 (Excellent), milder than 83% of U.S. cities in the PlainClimate database.
When is the growing season in Oregon City? ▼
Oregon City has approximately 245 frost-free days per year, with the last spring freeze around March 18 and the first fall freeze around November 18.
How much energy does heating and cooling require in Oregon City? ▼
Oregon City has 4,015 heating degree days and 543 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Oregon City climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00356334 near Oregon City.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00356334. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.