O O Ranch, Oregon climate: Climate normals at a NOAA weather station
O O Ranch's normal year runs from 20°F January nights to 85°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.5°C, January lows of −7°C, July highs of 30°C.
- NOAA stationO O Ranch
- Station IDUSC00356302
- Location43.28°N 119.31°W
- Elevation4,136 ft (1,261 m)
On October 23, the normal high in O O Ranch is 58°F and the normal low 29°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for O O Ranch.
- Jan 38° 20°
- Feb 42° 24°
- Mar 51° 29°
- Apr 56° 31°
- May 65° 35°
- Jun 74° 40°
- Jul 85° 46°
- Aug 85° 43°
- Sep 76° 35°
- Oct 62° 30°
- Nov 46° 23°
- Dec 39° 19°
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 O O Ranch each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 20°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 38°F | 20°F | 28.9°F | – | <1 | 28 | 9 h 20 min |
| February | 42°F | 24°F | 33.0°F | – | <1 | 26 | 10 h 30 min |
| March | 51°F | 29°F | 39.9°F | – | <1 | 24 | 11 h 50 min |
| April | 56°F | 31°F | 43.0°F | – | <1 | 20 | 13 h 20 min |
| May | 65°F | 35°F | 50.0°F | – | <1 | 10 | 14 h 40 min |
| June | 74°F | 40°F | 56.9°F | – | 2 | 2 | 15 h 20 min |
| July | 85°F | 46°F | 65.6°F | – | 14 | <1 | 15 h 10 min |
| August | 85°F | 43°F | 64.0°F | – | 12 | 1 | 14 h |
| September | 76°F | 35°F | 55.7°F | – | 2 | 10 | 12 h 30 min |
| October | 62°F | 30°F | 45.9°F | – | <1 | 23 | 11 h 10 min |
| November | 46°F | 23°F | 34.7°F | – | <1 | 26 | 9 h 40 min |
| December | 39°F | 19°F | 28.9°F | – | <1 | 29 | 9 h |
| Year (annual) | 60°F | 31°F | 45.5°F | – | 30 | 197 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 3°C | −7°C | −1.7°C |
| February | 5°C | −4°C | 0.6°C |
| March | 11°C | −2°C | 4.4°C |
| April | 13°C | −1°C | 6.1°C |
| May | 18°C | 2°C | 10.0°C |
| June | 23°C | 4°C | 13.8°C |
| July | 30°C | 8°C | 18.7°C |
| August | 29°C | 6°C | 17.8°C |
| September | 25°C | 2°C | 13.2°C |
| October | 17°C | −1°C | 7.7°C |
| November | 8°C | −5°C | 1.5°C |
| December | 4°C | −7°C | −1.7°C |
NOAA publishes no 1991-2020 snowfall normal for this station, and no record within 25 miles keeps one, so snow is left out here rather than estimated.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00356302; 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 O O Ranch?
Normal highs sit between 65°F and 85°F in June, 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 USC00356302.
When is the last frost at O O Ranch?
In O O Ranch, the last spring frost (32°F) comes after June 11 in half of years and after July 1 in one year in ten; the first autumn frost comes before September 6 in half of years and before August 19 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
- June 111 year in 10 after July 1; 9 in 10 after May 18
- First autumn frost, half of years before
- September 61 year in 10 before August 19; 9 in 10 before September 22
NOAA puts the median frost-free season at 88 days, and the season without a hard freeze (28°F) at 122 days.
A hard freeze (28°F) comes after May 22 in half of springs and before September 19 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts O O Ranch in zone 6a in ZIP code 97738, the nearest ZIP area.
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00356302; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 O O Ranch?
In a normal year in O O Ranch, 30 days a year reach 90°F (1 of them 100°F or more) and 197 nights fall to 32°F or colder.
- Days at 90°F or more
- 30a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 197a normal year
- Days that stay below freezing
- 12high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00356302.
How sunny is it at O O Ranch?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds at O O Ranch, 4.5 kWh per square metre a day. July is the sunniest month (92%) and December the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 64% | 1.7 |
| February | 69% | 2.7 |
| March | 70% | 3.9 |
| April | 75% | 5.4 |
| May | 77% | 6.5 |
| June | 84% | 7.5 |
| July | 92% | 7.8 |
| August | 91% | 6.8 |
| September | 88% | 5.2 |
| October | 80% | 3.5 |
| November | 69% | 2.0 |
| December | 61% | 1.4 |
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 O O Ranch record?
A normal year at O O Ranch brings 7,205 heating degree days, 34% more than the median U.S. place (5,373), and 135 cooling degree days, 85% 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 1,464 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,121 | 0 |
| February | 896 | 0 |
| March | 778 | 0 |
| April | 660 | 0 |
| May | 466 | 1 |
| June | 252 | 8 |
| July | 57 | 77 |
| August | 77 | 45 |
| September | 281 | 3 |
| October | 592 | 0 |
| November | 907 | 0 |
| December | 1,117 | 0 |
| Year (annual) | 7,205 | 135 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00356302. 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.
How does O O Ranch's climate compare?
O O Ranch is warmer than 7 of the 105 places with their own NOAA record in Oregon. Across the 7,247 U.S. stations with normals, its annual mean of 45.5°F is warmer than 21%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Questions about O O Ranch's climate
What is the coldest month at O O Ranch?
January, with a normal high of 38°F and a normal low of 20°F. The warmest is July (85°F by day, 46°F at night).
What plant hardiness zone is O O Ranch in?
The USDA's 2023 map puts O O Ranch in zone 6a in ZIP code 97738, the nearest ZIP area.
How late can frost come at O O Ranch?
In half of years the last 32°F night comes after June 11; in one year in ten it comes after July 1. Waiting until July 1 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Riley (10 mi WSW), OR23 miles from this station, 44.9°F a year
- Malheur Refuge Headquarters, OR24 miles from this station, 46.6°F a year
- Squaw Butte-Northern Great Bas, OR25 miles from this station, 45.7°F a year
- Burns, OR28 miles from this station, 46.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made