Santiam Junction, OR Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Santiam Junction's primary NOAA station, SANTIAM JUNCTION.
The climate verdict for Santiam Junction
Water is the standout signal in Santiam Junction, Oregon: 70.4 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 43°F. July is the warmest month at 59°F and December the coldest at 30°F.
- 43°F
- yearly average temperature, NOAA normal
- 70.4"
- annual precipitation
Santiam Junction: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00357554 · Santiam Junction, OR 43°F mean · 70.4" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-WET · SWING-NARROW · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 43°F
- RANK-COOL #823
- PHOTO-FINISH ≈ Lemon Dam
- PRCP-WET 70.4"
- SWING-NARROW 29°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 8,081 HDD
- STN-1 USC00357554
- BOOK-FULL 5/6 fields
Nearest mean-temperature peer: Lemon Dam, CO (+ 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.
- Santiam Junction (this station) 43°F
- Cold Westcliffe, CO 43°F
- Hot Lemon Dam, CO 43°F
- Near Meacham, OR 43°F
- Near Reese River Ione, NV 43°F
Climate Living Index · Santiam Junction
Santiam Junction: 10/100 · grade F
Santiam Junction publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Santiam Junction, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 198 calendar days | 15/100 · F |
| Annual temperature balance | 42.9°F · 24.6° from 67.5°F | 12/100 · F |
| Precipitation balance | 70.4 in · 35.4 from 35 in | 0/100 · F |
Santiam Junction · 2026-08-04 · NOAA NCEI Climate Normals · method .
Santiam Junction is a continental Köppen climate: Dsb
Coldest-month mean 29.8°F and warmest-month mean 59.2°F place this station in continental, dry-summer, warm summer climates (Dsb). Class Dsb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, dry-summer, warm summer.
- Köppen code
- Dsb
- Group
- Continental
- Warmest month
- 59.2°F
- Coldest month
- 29.8°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 Santiam Junction sits across the climate record
Three NOAA fields for Santiam Junction's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 88%
- Among 6,861 stations, Santiam Junction sits in the cooler third of annual means.
- Annual precipitation
- Top 2% wettest
- Santiam Junction's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 91%
- Warmest-to-coldest month gap for Santiam Junction is compact versus 6,861 complete station-years.
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 38°F (3°C) | 24°F (-5°C) | 31°F (-1°C) | 10.8" | 29.3 | 0.0 |
| February | 41°F (5°C) | 24°F (-5°C) | 32°F (0°C) | 7.8" | 26.1 | 0.0 |
| March | 44°F (6°C) | 26°F (-3°C) | 35°F (2°C) | 7.8" | 28.3 | 0.0 |
| April | 49°F (9°C) | 29°F (-2°C) | 39°F (4°C) | 6.0" | 23.6 | 0.0 |
| May | 58°F (14°C) | 35°F (2°C) | 46°F (8°C) | 4.0" | 12.7 | 0.0 |
| June | 65°F (18°C) | 38°F (3°C) | 52°F (11°C) | 2.8" | 5.3 | 0.3 |
| July | 76°F (24°C) | 42°F (6°C) | 59°F (15°C) | 0.7" | 1.2 | 2.7 |
| August | 77°F (25°C) | 42°F (5°C) | 59°F (15°C) | 0.8" | 2.2 | 2.5 |
| September | 69°F (20°C) | 39°F (4°C) | 54°F (12°C) | 2.3" | 6.3 | 0.4 |
| October | 56°F (13°C) | 33°F (0°C) | 44°F (7°C) | 5.9" | 16.4 | 0.0 |
| November | 42°F (6°C) | 28°F (-2°C) | 35°F (2°C) | 10.0" | 24.7 | 0.0 |
| December | 36°F (2°C) | 23°F (-5°C) | 30°F (-1°C) | 11.6" | 28.8 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 79°F around July 28, short of 90°F on every date, while 198 dates carry a normal low at or below freezing, the coldest 23°F near December 21.
The freezing stretch
The normal low stays at or below 32°F into May 2, then returns to freezing around October 18, covering 198 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
The widest day
August 4 carries the biggest normal gap between afternoon and dawn, 36°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Santiam Junction.
Where Santiam Junction Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 198 nights a year, placing this among the most frost-prone tenth of ranked stations.
This is one of the wettest normals climates ranked: about 70 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Santiam Junction earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
Santiam Junction's wet season runs through the cold months
December, January and February carry 43% 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 29.4°F seasonal spread.
- Wettest month
- December, 11.6"
- Driest month
- July, 0.7"
- Wettest three months
- December, January, November (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
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,081
Higher = more heating needed
Cooling Degree Days
47
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside OR closest to Santiam Junction 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 (43°F here).
- Columbia, SD 43°F · 0.0°F off
- Denio, NV 43°F · 0.0°F off
- Fullerton, ND 43°F · 0.0°F off
- Grand Meadow, MN 43°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (70.4" here), excluding temperature-peer places.
- Chalmette, LA 70.4" · 0.0" off
- Pascagoula, MS 70.4" · 0.0" off
- Seward, AK 69.7" · 0.7" off
- Thibodaux, LA 71.1" · 0.7" off
Data-derived climate profile
How Santiam Junction's climate pattern fits together
heating led · wet · low swing
Heating is the larger measured load in Santiam Junction, at 8,081 degree days versus 47 for cooling. Unlike a strongly continental record, however, its 29.4°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
A frost-free growing-season length is not available for Santiam Junction. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
Santiam Junction's 29.4°F seasonal spread is compact even though precipitation is abundant. July and December mark the typical warm and cold ends of the calendar. The annual average is 43°F. Temperature is relatively steady; the monthly rows show how rain and snow observations vary across the calendar.
Alongside its heating load, Santiam Junction carries 70.4 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 Santiam Junction'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 Santiam Junction, not an official NOAA class or a year-ahead forecast.
Questions about Santiam Junction's climate
How much rain does Santiam Junction get? ▼
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Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Santiam Junction's primary station: SANTIAM JUNCTION (USC00357554). 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 Santiam Junction; 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 Santiam Junction 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.