Riverside (7 mi SSW), Oregon climate: Climate normals at a NOAA weather station
Riverside (7 mi SSW)'s normal year runs from 20°F December nights to 93°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.2°C, December lows of −7°C, July highs of 34°C.
- NOAA stationRiverside (7 mi SSW)
- Station IDUSC00357208
- Location43.45°N 118.22°W
- Elevation3,380 ft (1,030 m)
On October 23, the normal high in Riverside (7 mi SSW) is 62°F and the normal low 27°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Riverside (7 mi SSW).
- Jan 40° 21°
- Feb 47° 22°
- Mar 57° 27°
- Apr 64° 30°
- May 73° 37°
- Jun 82° 43°
- Jul 93° 49°
- Aug 91° 45°
- Sep 82° 37°
- Oct 67° 29°
- Nov 49° 23°
- Dec 39° 20°
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 Riverside (7 mi SSW) each month?
July is the warmest month, with normal highs of 93°F; December the coldest, with normal lows of 20°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 40°F | 21°F | 30.5°F | – | <1 | 28 | 9 h 20 min |
| February | 47°F | 22°F | 34.4°F | – | <1 | 26 | 10 h 30 min |
| March | 57°F | 27°F | 41.9°F | – | <1 | 25 | 11 h 50 min |
| April | 64°F | 30°F | 46.9°F | – | <1 | 19 | 13 h 20 min |
| May | 73°F | 37°F | 54.9°F | – | 1 | 10 | 14 h 40 min |
| June | 82°F | 43°F | 62.4°F | – | 6 | 3 | 15 h 20 min |
| July | 93°F | 49°F | 70.7°F | – | 22 | <1 | 15 h 10 min |
| August | 91°F | 45°F | 67.9°F | – | 18 | 1 | 14 h |
| September | 82°F | 37°F | 59.3°F | – | 6 | 11 | 12 h 30 min |
| October | 67°F | 29°F | 47.8°F | – | <1 | 20 | 11 h 10 min |
| November | 49°F | 23°F | 36.2°F | – | <1 | 25 | 9 h 40 min |
| December | 39°F | 20°F | 29.7°F | – | <1 | 28 | 9 h |
| Year (annual) | 65°F | 32°F | 48.5°F | – | 54 | 195 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 4°C | −6°C | −0.8°C |
| February | 8°C | −5°C | 1.3°C |
| March | 14°C | −3°C | 5.5°C |
| April | 18°C | −1°C | 8.3°C |
| May | 23°C | 3°C | 12.7°C |
| June | 28°C | 6°C | 16.9°C |
| July | 34°C | 9°C | 21.5°C |
| August | 33°C | 7°C | 19.9°C |
| September | 28°C | 3°C | 15.2°C |
| October | 19°C | −2°C | 8.8°C |
| November | 9°C | −5°C | 2.3°C |
| December | 4°C | −7°C | −1.3°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 USC00357208; 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 Riverside (7 mi SSW)?
Normal highs sit between 65°F and 85°F in May, June, September and October.
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 USC00357208.
When is the last frost at Riverside (7 mi SSW)?
In Riverside (7 mi SSW), the last spring frost (32°F) comes after June 7 in half of years and after June 28 in one year in ten; the first autumn frost comes before September 6 in half of years and before August 22 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 71 year in 10 after June 28; 9 in 10 after May 21
- First autumn frost, half of years before
- September 61 year in 10 before August 22; 9 in 10 before September 22
NOAA puts the median frost-free season at 89 days, and the season without a hard freeze (28°F) at 121 days.
A hard freeze (28°F) comes after May 20 in half of springs and before September 19 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Riverside (7 mi SSW) in zone 6a in ZIP code 97732, 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 USC00357208; 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 Riverside (7 mi SSW)?
In a normal year in Riverside (7 mi SSW), 54 days a year reach 90°F (6 of them 100°F or more) and 195 nights fall to 32°F or colder.
- Days at 90°F or more
- 54a normal year
- Days at 100°F or more
- 6a normal year
- Nights at 32°F or colder
- 195a normal year
- Days that stay below freezing
- 16high of 32°F or less
The highest temperature in this station's record (since 1897) is 111°F, on July 23, 1905; the lowest is −36°F, on February 9, 1933.
The wettest calendar year on that record is 1981, with 14.23 in; the snowiest season is 1983–84, with 40.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00357208; records: ACIS (NOAA Regional Climate Centers), station USC00357208. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Riverside (7 mi SSW)?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds at Riverside (7 mi SSW), 4.5 kWh per square metre a day. July is the sunniest month (92%) and December the cloudiest (59%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 1.7 |
| February | 69% | 2.7 |
| March | 71% | 3.9 |
| April | 76% | 5.5 |
| May | 78% | 6.6 |
| June | 85% | 7.5 |
| July | 92% | 7.8 |
| August | 91% | 6.7 |
| September | 88% | 5.2 |
| October | 82% | 3.5 |
| November | 70% | 2.0 |
| December | 59% | 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 Riverside (7 mi SSW) record?
A normal year at Riverside (7 mi SSW) brings 6,377 heating degree days, 19% more than the median U.S. place (5,373), and 403 cooling degree days, 56% 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 2,165 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,071 | 0 |
| February | 855 | 0 |
| March | 716 | 0 |
| April | 541 | 0 |
| May | 321 | 7 |
| June | 126 | 48 |
| July | 21 | 197 |
| August | 40 | 132 |
| September | 191 | 19 |
| October | 535 | 0 |
| November | 864 | 0 |
| December | 1,096 | 0 |
| Year (annual) | 6,377 | 403 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00357208. 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 Riverside (7 mi SSW)'s climate compare?
Riverside (7 mi SSW) is warmer than 22 of the 105 places with their own NOAA record in Oregon. Across the 7,247 U.S. stations with normals, its annual mean of 48.5°F is warmer than 34%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Questions about Riverside (7 mi SSW)'s climate
What is the coldest month at Riverside (7 mi SSW)?
December, with a normal high of 39°F and a normal low of 20°F. The warmest is July (93°F by day, 49°F at night).
What plant hardiness zone is Riverside (7 mi SSW) in?
The USDA's 2023 map puts Riverside (7 mi SSW) in zone 6a in ZIP code 97732, the nearest ZIP area.
How late can frost come at Riverside (7 mi SSW)?
In half of years the last 32°F night comes after June 7; in one year in ten it comes after June 28. Waiting until June 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Drewsey, OR26 miles from this station, 45.9°F a year
- Malheur Refuge Headquarters, OR34 miles from this station, 46.6°F a year
- Burns, OR38 miles from this station, 46.0°F a year
- Westfall, OR45 miles from this station, 50.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made