Rex (1 mi S), Oregon climate: Climate normals at a NOAA weather station
Rex (1 mi S)'s normal year runs from 34°F December nights to 81°F August afternoons, with 44.2 inches of precipitation and 1 inch of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.7°C, December lows of 1°C, August highs of 27°C, 1,123 mm of precipitation a year.
- NOAA stationRex (1 mi S)
- Station IDUSC00357127
- Location45.30°N 122.91°W
- Elevation515 ft (157 m)
On October 23, the normal high in Rex (1 mi S) is 59°F and the normal low 44°F, and the chance of measurable rain or snow is 46%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Rex (1 mi S).
- Jan 45° 35°
- Feb 50° 36°
- Mar 55° 38°
- Apr 61° 41°
- May 66° 47°
- Jun 72° 51°
- Jul 81° 56°
- Aug 81° 56°
- Sep 75° 52°
- Oct 62° 45°
- Nov 51° 39°
- Dec 44° 34°
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 Rex (1 mi S) each month?
August is the warmest month, with normal highs of 81°F; December the coldest, with normal lows of 34°F. The most precipitation falls in December (7.37 in), the least in July (0.43 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 45°F | 35°F | 40.2°F | 6.38 | 0.6 | 20 | <1 | 11 | 9 h 10 min |
| February | 50°F | 36°F | 42.6°F | 4.56 | 0.1 | 16 | <1 | 9 | 10 h 20 min |
| March | 55°F | 38°F | 46.8°F | 4.77 | 0.2 | 18 | <1 | 5 | 11 h 50 min |
| April | 61°F | 41°F | 50.6°F | 3.56 | 0.0 | 15 | <1 | 1 | 13 h 30 min |
| May | 66°F | 47°F | 56.5°F | 2.57 | 0.0 | 11 | <1 | <1 | 14 h 50 min |
| June | 72°F | 51°F | 61.5°F | 1.58 | 0.0 | 8 | 2 | <1 | 15 h 40 min |
| July | 81°F | 56°F | 68.1°F | 0.43 | 0.0 | 3 | 5 | <1 | 15 h 20 min |
| August | 81°F | 56°F | 68.5°F | 0.55 | 0.0 | 3 | 6 | <1 | 14 h 10 min |
| September | 75°F | 52°F | 63.4°F | 1.63 | 0.0 | 7 | 2 | <1 | 12 h 40 min |
| October | 62°F | 45°F | 53.7°F | 4.17 | 0.0 | 13 | <1 | 1 | 11 h |
| November | 51°F | 39°F | 45.1°F | 6.65 | 0.0 | 19 | <1 | 4 | 9 h 30 min |
| December | 44°F | 34°F | 39.2°F | 7.37 | 0.1 | 20 | <1 | 12 | 8 h 50 min |
| Year (annual) | 62°F | 44°F | 53.0°F | 44.22 | 1.0 | 153 | 15 | 43 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 7°C | 2°C | 4.6°C | 162 mm | 2 cm |
| February | 10°C | 2°C | 5.9°C | 116 mm | 0 cm |
| March | 13°C | 3°C | 8.2°C | 121 mm | 1 cm |
| April | 16°C | 5°C | 10.3°C | 90 mm | 0 cm |
| May | 19°C | 8°C | 13.6°C | 65 mm | 0 cm |
| June | 22°C | 11°C | 16.4°C | 40 mm | 0 cm |
| July | 27°C | 13°C | 20.1°C | 11 mm | 0 cm |
| August | 27°C | 13°C | 20.3°C | 14 mm | 0 cm |
| September | 24°C | 11°C | 17.4°C | 41 mm | 0 cm |
| October | 17°C | 7°C | 12.1°C | 106 mm | 0 cm |
| November | 10°C | 4°C | 7.3°C | 169 mm | 0 cm |
| December | 7°C | 1°C | 4.0°C | 187 mm | 0 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00357127; 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 Rex (1 mi S)?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (3).
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 USC00357127.
When is the last frost at Rex (1 mi S)?
In Rex (1 mi S), the last spring frost (32°F) comes after March 21 in half of years and after April 19 in one year in ten; the first autumn frost comes before November 22 in half of years and before November 4 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
- March 211 year in 10 after April 19; 9 in 10 after February 23
- First autumn frost, half of years before
- November 221 year in 10 before November 4; 9 in 10 before December 12
NOAA puts the median frost-free season at 241 days, and the season without a hard freeze (28°F) at 301 days.
A hard freeze (28°F) comes after February 15 in half of springs and before December 10 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Rex (1 mi S) in zone 8b in ZIP code 97140, 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 USC00357127; 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 Rex (1 mi S)?
In a normal year in Rex (1 mi S), 15 days a year reach 90°F (1 of them 100°F or more), 43 nights fall to 32°F or colder and 153 days bring measurable precipitation.
- Days at 90°F or more
- 15a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 43a normal year
- Days that stay below freezing
- 4high of 32°F or less
- Days with 0.01 inch of precipitation
- 153a normal year
- Days with 1 inch of snow or more
- fewer than 1a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00357127.
How sunny is it at Rex (1 mi S)?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds at Rex (1 mi S), 3.7 kWh per square metre a day. July is the sunniest month (83%) and December the cloudiest (52%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 54% | 1.2 |
| February | 60% | 2.1 |
| March | 59% | 3.0 |
| April | 63% | 4.3 |
| May | 68% | 5.4 |
| June | 70% | 6.0 |
| July | 83% | 6.8 |
| August | 83% | 5.8 |
| September | 78% | 4.3 |
| October | 67% | 2.6 |
| November | 56% | 1.4 |
| December | 52% | 1.0 |
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 Rex (1 mi S) record?
A normal year at Rex (1 mi S) brings 4,712 heating degree days, 12% fewer than the median U.S. place (5,373), and 364 cooling degree days, 60% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,381 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 769 | 0 |
| February | 629 | 0 |
| March | 564 | 0 |
| April | 435 | 3 |
| May | 273 | 11 |
| June | 142 | 39 |
| July | 26 | 124 |
| August | 21 | 131 |
| September | 101 | 53 |
| October | 354 | 4 |
| November | 597 | 0 |
| December | 801 | 0 |
| Year (annual) | 4,712 | 364 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00357127. 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 Rex (1 mi S) been warmer than normal?
2024 averaged 53.6°F, 0.6°F above the 1991-2020 normal of 53.0°F. 3 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 54.0°F | +1.0°F | 47.15 | 9.5 |
| 2022 | 53.2°F | +0.2°F | 42.80 | 0.0 |
| 2024 | 53.6°F | +0.6°F | – | – |
Source: observed years: ACIS, station USC00357127. A year counts only with all twelve months complete.
How does Rex (1 mi S)'s climate compare?
Rex (1 mi S) is warmer than 68 of the 105 places with their own NOAA record in Oregon, and wetter than 59. Across the 7,247 U.S. stations with normals, its annual mean of 53.0°F is warmer than 54%.
In the Köppen classification computed from these normals, Rex (1 mi S) 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.
Which places near Rex (1 mi S) share this climate record?
4 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Newberg, OR27,136 people · 2 mi W
- Sherwood, OR20,441 people · 5 mi NE
- Dundee, OR3,200 people · 5 mi SW
- St. Paul, OR426 people · 7 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Rex (1 mi S)'s climate
What is the coldest month at Rex (1 mi S)?
December, with a normal high of 44°F and a normal low of 34°F. The warmest is August (81°F by day, 56°F at night).
Does it snow at Rex (1 mi S)?
Yes: 1 inch in a normal year, falling on 1 days with 0.1 inch or more, the most in January (0.6 inches).
What is the rainiest month at Rex (1 mi S)?
December, with 7.37 in of precipitation in a normal year; the driest is July with 0.43 in.
What plant hardiness zone is Rex (1 mi S) in?
The USDA's 2023 map puts Rex (1 mi S) in zone 8b in ZIP code 97140, the nearest ZIP area.
How late can frost come at Rex (1 mi S)?
In half of years the last 32°F night comes after March 21; in one year in ten it comes after April 19. Waiting until April 19 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Aurora, OR8 miles from this station, 54.8°F a year
- North Willamette Experiment Station, OR8 miles from this station, 53.9°F a year
- Beaverton, OR11 miles from this station, 53.7°F a year
- McMinnville, OR13 miles from this station, 52.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made