Santiam Junction, Oregon climate: Climate normals at a NOAA weather station
Santiam Junction's normal year runs from 23°F December nights to 76°F July afternoons, with 70.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.1°C, December lows of −5°C, July highs of 24°C, 1,788 mm of precipitation a year.
- NOAA stationSantiam Junction
- Station IDUSC00357554
- Location44.44°N 121.94°W
- Elevation3,750 ft (1,143 m)
On October 23, the normal high in Santiam Junction is 53°F and the normal low 31°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Santiam Junction.
- Jan 38° 24°
- Feb 41° 24°
- Mar 44° 26°
- Apr 49° 29°
- May 58° 35°
- Jun 65° 38°
- Jul 76° 42°
- Aug 77° 42°
- Sep 69° 39°
- Oct 56° 33°
- Nov 42° 28°
- Dec 36° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Santiam Junction each month?
July is the warmest month, with normal highs of 76°F; December the coldest, with normal lows of 23°F. The most precipitation falls in December (11.58 in), the least in July (0.66 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 38°F | 24°F | 30.6°F | 10.84 | – | <1 | 29 | 9 h 10 min |
| February | 41°F | 24°F | 32.1°F | 7.79 | – | <1 | 26 | 10 h 30 min |
| March | 44°F | 26°F | 34.7°F | 7.76 | – | <1 | 28 | 11 h 50 min |
| April | 49°F | 29°F | 38.8°F | 6.03 | – | <1 | 24 | 13 h 30 min |
| May | 58°F | 35°F | 46.2°F | 4.01 | – | <1 | 13 | 14 h 50 min |
| June | 65°F | 38°F | 51.5°F | 2.81 | – | <1 | 5 | 15 h 30 min |
| July | 76°F | 42°F | 59.2°F | 0.66 | – | 3 | 1 | 15 h 10 min |
| August | 77°F | 42°F | 59.1°F | 0.77 | – | 3 | 2 | 14 h 10 min |
| September | 69°F | 39°F | 53.8°F | 2.28 | – | <1 | 6 | 12 h 40 min |
| October | 56°F | 33°F | 44.3°F | 5.88 | – | <1 | 16 | 11 h |
| November | 42°F | 28°F | 35.0°F | 9.98 | – | <1 | 25 | 9 h 40 min |
| December | 36°F | 23°F | 29.8°F | 11.58 | – | <1 | 29 | 8 h 50 min |
| Year (annual) | 54°F | 32°F | 42.9°F | 70.39 | – | 6 | 205 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 3°C | −5°C | −0.8°C | 275 mm |
| February | 5°C | −5°C | 0.1°C | 198 mm |
| March | 6°C | −3°C | 1.5°C | 197 mm |
| April | 9°C | −2°C | 3.8°C | 153 mm |
| May | 14°C | 2°C | 7.9°C | 102 mm |
| June | 18°C | 3°C | 10.8°C | 71 mm |
| July | 24°C | 6°C | 15.1°C | 17 mm |
| August | 25°C | 5°C | 15.1°C | 20 mm |
| September | 20°C | 4°C | 12.1°C | 58 mm |
| October | 13°C | 0°C | 6.8°C | 149 mm |
| November | 6°C | −2°C | 1.7°C | 253 mm |
| December | 2°C | −5°C | −1.2°C | 294 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Belknap Springs (8 mi N) (11 miles away), gets 51 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00357554; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Santiam Junction?
Normal highs sit between 65°F and 85°F in July, August and September.
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00357554.
How hot and how cold does it get at Santiam Junction?
In a normal year in Santiam Junction, 6 days a year reach 90°F and 205 nights fall to 32°F or colder.
- Days at 90°F or more
- 6a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 205a normal year
- Days that stay below freezing
- 23high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00357554.
How sunny is it at Santiam Junction?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at Santiam Junction, 4.3 kWh per square metre a day. July is the sunniest month (92%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 62% | 1.5 |
| February | 67% | 2.5 |
| March | 67% | 3.6 |
| April | 71% | 5.0 |
| May | 75% | 6.2 |
| June | 82% | 7.1 |
| July | 92% | 7.7 |
| August | 91% | 6.6 |
| September | 86% | 4.9 |
| October | 76% | 3.1 |
| November | 65% | 1.8 |
| December | 60% | 1.3 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Santiam Junction record?
A normal year at Santiam Junction brings 8,081 heating degree days, 50% more than the median U.S. place (5,373), and 47 cooling degree days, 95% fewer than the median (908). Ten months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 942 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,066 | 0 |
| February | 920 | 0 |
| March | 939 | 0 |
| April | 786 | 0 |
| May | 583 | 0 |
| June | 410 | 3 |
| July | 199 | 19 |
| August | 202 | 19 |
| September | 343 | 5 |
| October | 642 | 0 |
| November | 900 | 0 |
| December | 1,091 | 0 |
| Year (annual) | 8,081 | 47 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00357554. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Santiam Junction been warmer than normal?
2022 averaged 43.2°F, 0.3°F above the 1991-2020 normal of 42.9°F. 2 of the 2 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 43.3°F | +0.4°F | – |
| 2022 | 43.2°F | +0.3°F | – |
Source: observed years: ACIS, station USC00357554. A year counts only with all twelve months complete.
How does Santiam Junction's climate compare?
Santiam Junction is warmer than 3 of the 105 places with their own NOAA record in Oregon, and wetter than 84. Across the 7,247 U.S. stations with normals, its annual mean of 42.9°F is warmer than 12%.
In the Köppen classification computed from these normals, Santiam Junction is Dsb: continental, dry-summer, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Questions about Santiam Junction's climate
What is the coldest month at Santiam Junction?
December, with a normal high of 36°F and a normal low of 23°F. The warmest is July (76°F by day, 42°F at night).
Does it snow at Santiam Junction?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Belknap Springs (8 mi N) (11 miles away), records 51 inches of snow in a normal year.
What is the rainiest month at Santiam Junction?
December, with 11.58 in of precipitation in a normal year; the driest is July with 0.66 in.
What plant hardiness zone is Santiam Junction in?
The USDA's 2023 map puts Santiam Junction in zone 7a in ZIP code 97759, the nearest ZIP area.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Belknap Springs (8 mi N), OR11 miles from this station, 48.0°F a year
- Marion Forks Fish Hatchery, OR12 miles from this station, 47.1°F a year
- McKenzie River Ranger Station, OR20 miles from this station, 50.8°F a year
- Sisters, OR22 miles from this station, 45.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made