Climate Comfort Score
68/100
Good
NOAA 1991–2020 normals 53°F annual avg Public-domain federal data
Troutdale, OR Climate
Explore average temperature, rainfall, and comfort score sourced from NOAA NCEI's 1991–2020 climate normals →
- 53°F
- Avg annual temp
- 68/100
- Comfort score
- 48.4"
- Annual precip
- 236d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Troutdale
Troutdale, Oregon averages 53°F a year and scores 68/100 on the comfort index - good, milder than 58% of U.S. cities.
- 53°F
- annual average temperature (NOAA normal)
- 68/100
- comfort score, milder than 58% of U.S. cities
- 48.4"
- yearly precipitation total
- 236 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
53°F (12°C)
Avg High
62°F
Avg Low
45°F
Annual Precip
48.4"
Comfort Score
68/100
Good
Avg Annual Temperature
53°F
30-year mean (NOAA NCEI)
Annual Precipitation
48.4"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Troutdale) 68.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Troutdale area.
How Troutdale compares to every U.S. city
Troutdale's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 42% higher than 58% 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 Troutdale
MethodologyTroutdale's NOAA 1991-2020 normal sits inside a longer story: U.S. land temperatures have been tracking (and drifting from) the global mean since 1900, and the chart below shows that spread, with the most recent decade running warmer than the 30-year mean.
- 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 | 44°F (7°C) | 35°F (2°C) | 40°F (4°C) | 6.3" | 10.2 | 0.0 |
| February | 49°F (9°C) | 37°F (3°C) | 43°F (6°C) | 4.7" | 8.1 | 0.0 |
| March | 55°F (13°C) | 39°F (4°C) | 47°F (8°C) | 5.1" | 4.9 | 0.0 |
| April | 61°F (16°C) | 42°F (5°C) | 51°F (11°C) | 4.2" | 1.4 | 0.0 |
| May | 68°F (20°C) | 48°F (9°C) | 58°F (14°C) | 3.3" | 0.3 | 0.4 |
| June | 73°F (23°C) | 52°F (11°C) | 62°F (17°C) | 2.4" | 0.0 | 1.9 |
| July | 81°F (27°C) | 56°F (13°C) | 68°F (20°C) | 0.6" | 0.0 | 6.4 |
| August | 81°F (27°C) | 56°F (13°C) | 68°F (20°C) | 0.7" | 0.0 | 7.4 |
| September | 75°F (24°C) | 51°F (11°C) | 63°F (17°C) | 1.9" | 0.0 | 1.7 |
| October | 63°F (17°C) | 46°F (8°C) | 54°F (12°C) | 4.6" | 0.9 | 0.0 |
| November | 51°F (11°C) | 40°F (5°C) | 46°F (8°C) | 7.5" | 4.6 | 0.0 |
| December | 45°F (7°C) | 36°F (2°C) | 40°F (5°C) | 7.1" | 9.4 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 6.3"
February 4.7"
March 5.1"
April 4.2"
May 3.3"
June 2.4"
July 0.6"
August 0.7"
September 1.9"
October 4.6"
November 7.5"
December 7.1"
Frost Dates & Growing Season
First Fall Freeze
November 17
50% probability date
Last Spring Freeze
March 26
50% probability date
Growing Season
236 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,574
Higher = more heating needed
Cooling Degree Days
361
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nearby Cities
What Troutdale's climate means for you
Troutdale runs 53°F a year - peaking in August, coldest in January.
- Gardeners get about 236 frost-free days, with the last spring freeze near March 26 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,574 heating and 361 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: Troutdale, OR
The NOAA 1991–2020 climate normals describe Troutdale, Oregon as a location with an annual average temperature of 53°F, ranging from a mean daily high of 62°F to a mean daily low of 45°F. August is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00358634, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Troutdale sees about 48.4 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 236 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 26 and the first fall freeze near November 17. On the energy side, 4,574 heating degree days and 361 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Troutdale scores 68/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings August-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Troutdale, OR? ▼
The average annual temperature in Troutdale, Oregon is 53°F. The warmest month averages 81°F (27°C) and the coldest averages 35°F (2°C).
How much rain does Troutdale get? ▼
Troutdale receives 48.4 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Troutdale? ▼
Troutdale has a climate comfort score of 68/100 (Good), milder than 58% of U.S. cities in the PlainClimate database.
When is the growing season in Troutdale? ▼
Troutdale has approximately 236 frost-free days per year, with the last spring freeze around March 26 and the first fall freeze around November 17.
How much energy does heating and cooling require in Troutdale? ▼
Troutdale has 4,574 heating degree days and 361 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 Troutdale climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00358634 near Troutdale.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00358634. 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.