Marion Forks Fish Hatchery, Oregon climate: Climate normals at a NOAA weather station
Marion Forks Fish Hatchery's normal year runs from 27°F December nights to 82°F July afternoons, with 74.1 inches of precipitation and 85 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.4°C, December lows of −3°C, July highs of 28°C, 1,882 mm of precipitation a year.
- NOAA stationMarion Forks Fish Hatchery
- Station IDUSC00355221
- Location44.61°N 121.95°W
- Elevation2,475 ft (754 m)
On October 23, the normal high in Marion Forks Fish Hatchery is 56°F and the normal low 34°F, and the chance of measurable rain or snow is 49%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Marion Forks Fish Hatchery.
- Jan 40° 27°
- Feb 44° 28°
- Mar 49° 29°
- Apr 56° 33°
- May 64° 38°
- Jun 71° 43°
- Jul 82° 47°
- Aug 82° 46°
- Sep 74° 41°
- Oct 60° 35°
- Nov 46° 31°
- Dec 38° 27°
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 Marion Forks Fish Hatchery each month?
July is the warmest month, with normal highs of 82°F; December the coldest, with normal lows of 27°F. The most precipitation falls in December (12.44 in), the least in August (0.66 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 40°F | 27°F | 33.4°F | 11.25 | 24.3 | 19 | <1 | 27 | 9 h 10 min |
| February | 44°F | 28°F | 35.8°F | 7.80 | 17.5 | 16 | <1 | 24 | 10 h 20 min |
| March | 49°F | 29°F | 39.4°F | 8.59 | 13.0 | 20 | <1 | 25 | 11 h 50 min |
| April | 56°F | 33°F | 44.0°F | 6.33 | 2.9 | 18 | <1 | 16 | 13 h 30 min |
| May | 64°F | 38°F | 51.3°F | 4.39 | 0.2 | 15 | <1 | 5 | 14 h 50 min |
| June | 71°F | 43°F | 57.1°F | 2.90 | 0.0 | 11 | 1 | <1 | 15 h 30 min |
| July | 82°F | 47°F | 64.3°F | 0.68 | 0.0 | 4 | 7 | <1 | 15 h 20 min |
| August | 82°F | 46°F | 63.8°F | 0.66 | 0.0 | 4 | 6 | <1 | 14 h 10 min |
| September | 74°F | 41°F | 57.6°F | 2.23 | 0.0 | 7 | 2 | 2 | 12 h 40 min |
| October | 60°F | 35°F | 47.5°F | 6.06 | 0.1 | 14 | <1 | 11 | 11 h |
| November | 46°F | 31°F | 38.3°F | 10.75 | 7.6 | 19 | <1 | 19 | 9 h 40 min |
| December | 38°F | 27°F | 32.9°F | 12.44 | 19.6 | 19 | <1 | 27 | 8 h 50 min |
| Year (annual) | 59°F | 35°F | 47.1°F | 74.08 | 85.2 | 165 | 16 | 155 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −3°C | 0.8°C | 286 mm | 62 cm |
| February | 7°C | −2°C | 2.1°C | 198 mm | 44 cm |
| March | 10°C | −1°C | 4.1°C | 218 mm | 33 cm |
| April | 13°C | 0°C | 6.7°C | 161 mm | 7 cm |
| May | 18°C | 3°C | 10.7°C | 112 mm | 1 cm |
| June | 22°C | 6°C | 13.9°C | 74 mm | 0 cm |
| July | 28°C | 8°C | 17.9°C | 17 mm | 0 cm |
| August | 28°C | 8°C | 17.7°C | 17 mm | 0 cm |
| September | 24°C | 5°C | 14.2°C | 57 mm | 0 cm |
| October | 15°C | 2°C | 8.6°C | 154 mm | 0 cm |
| November | 8°C | −1°C | 3.5°C | 273 mm | 19 cm |
| December | 3°C | −3°C | 0.5°C | 316 mm | 50 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00355221; 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 Marion Forks Fish Hatchery?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, July has the fewest days with rain (4).
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 USC00355221.
When is the last frost at Marion Forks Fish Hatchery?
In Marion Forks Fish Hatchery, the last spring frost (32°F) comes after May 15 in half of years and after June 11 in one year in ten; the first autumn frost comes before September 30 in half of years and before September 10 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 151 year in 10 after June 11; 9 in 10 after April 29
- First autumn frost, half of years before
- September 301 year in 10 before September 10; 9 in 10 before October 18
NOAA puts the median frost-free season at 134 days, and the season without a hard freeze (28°F) at 182 days.
A hard freeze (28°F) comes after April 24 in half of springs and before October 23 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Marion Forks Fish Hatchery in zone 7b in ZIP code 97350, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 8a: the coldest night of a typical year reaches 10°F (30 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00355221; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Marion Forks Fish Hatchery?
In a normal year in Marion Forks Fish Hatchery, 16 days a year reach 90°F, 155 nights fall to 32°F or colder and 165 days bring measurable precipitation.
- Days at 90°F or more
- 16a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 155a normal year
- Days that stay below freezing
- 6high of 32°F or less
- Days with 0.01 inch of precipitation
- 165a normal year
- Days with 1 inch of snow or more
- 23a normal year
The highest temperature in this station's record (since 1948) is 108°F, on June 29, 2021; the lowest is −6°F, on January 24, 1949.
The wettest calendar year on that record is 1996, with 127.10 in; the snowiest season is 1968–69, with 285.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00355221; records: ACIS (NOAA Regional Climate Centers), station USC00355221. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Marion Forks Fish Hatchery?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at Marion Forks Fish Hatchery, 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 Marion Forks Fish Hatchery record?
A normal year at Marion Forks Fish Hatchery brings 6,647 heating degree days, 24% more than the median U.S. place (5,373), and 141 cooling degree days, 84% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,528 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 980 | 0 |
| February | 819 | 0 |
| March | 795 | 0 |
| April | 630 | 0 |
| May | 425 | 2 |
| June | 251 | 14 |
| July | 83 | 63 |
| August | 90 | 52 |
| September | 234 | 11 |
| October | 543 | 0 |
| November | 803 | 0 |
| December | 997 | 0 |
| Year (annual) | 6,647 | 141 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00355221. 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 Marion Forks Fish Hatchery been warmer than normal?
2025 averaged 49.0°F, 1.9°F above the 1991-2020 normal of 47.1°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 48.5°F | +1.4°F | 64.60 | 97.6 |
| 2022 | 47.3°F | +0.2°F | 68.56 | 77.5 |
| 2023 | 47.4°F | +0.3°F | 56.40 | 96.9 |
| 2024 | 47.6°F | +0.5°F | 81.06 | 99.8 |
| 2025 | 49.0°F | +1.9°F | 63.04 | 35.0 |
Over 65 complete years from 1951 to 2025, the station's annual mean temperature rose at a fitted 3.5°F per century (+0.19°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00355221; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Marion Forks Fish Hatchery's climate compare?
Marion Forks Fish Hatchery is warmer than 13 of the 105 places with their own NOAA record in Oregon, and wetter than 85. Across the 7,247 U.S. stations with normals, its annual mean of 47.1°F is warmer than 28%.
In the Köppen classification computed from these normals, Marion Forks Fish Hatchery is Csb: temperate, 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 Marion Forks Fish Hatchery's climate
What is the coldest month at Marion Forks Fish Hatchery?
December, with a normal high of 38°F and a normal low of 27°F. The warmest is July (82°F by day, 47°F at night).
Does it snow at Marion Forks Fish Hatchery?
Yes: 85 inches in a normal year, falling on 28 days with 0.1 inch or more, the most in January (24.3 inches).
What is the rainiest month at Marion Forks Fish Hatchery?
December, with 12.44 in of precipitation in a normal year; the driest is August with 0.66 in.
What plant hardiness zone is Marion Forks Fish Hatchery in?
The USDA's 2023 map puts Marion Forks Fish Hatchery in zone 7b in ZIP code 97350, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 10°F (30 years, 1991-2020): zone 8a.
How late can frost come at Marion Forks Fish Hatchery?
In half of years the last 32°F night comes after May 15; in one year in ten it comes after June 11. Waiting until June 11 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Santiam Junction, OR12 miles from this station, 42.9°F a year
- Detroit, OR17 miles from this station, 52.5°F a year
- Belknap Springs (8 mi N), OR23 miles from this station, 48.0°F a year
- Sisters, OR30 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