Troutdale, 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 Troutdale's primary NOAA station, TROUTDALE.
The climate verdict for Troutdale
Water is the standout signal in Troutdale, Oregon: 48.4 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 53°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 53°F
- annual average temperature (NOAA normal)
- 68/100
- comfort score, above 56% of station-mapped location scores
- 48.4"
- yearly precipitation total
- 236 days
- frost-free days per growing season
Troutdale: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00358634 · Troutdale, OR 53°F mean · 48.4" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-NARROW · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 53°F
- RANK-MID #3,774
- PHOTO-FINISH ≈ Mtn City
- PRCP-MID 48.4"
- SWING-NARROW 29°F
- COMF-MID 68/100
- LOAD-HEAT 4,574 HDD
- STN-1 USC00358634
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Mtn City, GA ( -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.
- Hot McMinnville, OR 54°F
- Near Jocassee, SC 54°F
- Near Capitan, NM 54°F
- Troutdale (this station) 53°F
- Cold Mtn City, GA 53°F
Climate Living Index · Troutdale
Troutdale: 73/100 · grade B
Troutdale publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Troutdale, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Frost-free season | 236 days/year | 83/100 · B |
| Annual temperature balance | 53.4°F · 14.1° from 67.5°F | 54/100 · D |
| Precipitation balance | 48.4 in · 13.4 from 35 in | 53/100 · D |
Troutdale · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Troutdale is a temperate Köppen climate: Csb
Coldest-month mean 39.8°F and warmest-month mean 68.4°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
- 68.4°F
- Coldest month
- 39.8°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 Troutdale sits across the climate record
Three NOAA fields for Troutdale's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 55th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 23% wettest
- Troutdale'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 Troutdale is compact versus 6,861 complete station-years.
How Troutdale compares across U.S. station-mapped locations
Troutdale's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% 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%). This entry sits in this band.
- 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
Troutdale's measured station temperature trend
MethodologyAcross 38 complete annual observations from 1949 to 2023, TROUTDALE 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.
- Troutdale 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 | 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 |
The year, day by day
The calendar barely moves in Troutdale: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 35°F near December 29 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 35°F around December 29.
The widest day
July 28 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 Troutdale.
Monthly Precipitation
Average monthly rainfall
Troutdale's wet season runs through the cold months
December, January and February carry 37% of the year's precipitation here, while June through August contribute 8%. 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
- November, 7.5"
- Driest month
- July, 0.6"
- Wettest three months
- November, December, January (43% 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 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
Nationwide similar cities
Other rankable U.S. places outside OR closest to Troutdale 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).
- Carlinville, IL 53°F · 0.0°F off
- Clayton, NM 53°F · 0.0°F off
- Doylestown, PA 53°F · 0.0°F off
- Fulton, MO 53°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (48.4" here), excluding temperature-peer places.
- Benton, PA 48.4" · 0.0" off
- Grampian, PA 48.3" · 0.0" off
- Louisville, KY 48.3" · 0.0" off
- Rocky Ford, GA 48.4" · 0.0" off
Data-derived climate profile
How Troutdale's climate pattern fits together
heating led · wet · low swing
Heating is the larger measured load in Troutdale, at 4,574 degree days versus 361 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.
Troutdale's frost-free season lasts about 236 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
Troutdale'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, Troutdale carries 48.4 inches of precipitation in a normal year, inside PlainClimate's wet range. Snowfall is not added to the interpretation because its annual value is missing. 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 Troutdale'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 Troutdale, not an official NOAA class or a year-ahead forecast.
Questions about Troutdale's climate
How much rain does Troutdale get? ▼
How much energy does heating and cooling require in Troutdale? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Troutdale's primary station: TROUTDALE (USC00358634). 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 4174850). Match rule for Troutdale: 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 Troutdale 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.