Beaverton, Oregon climate: Normal weather by month, frost dates and records
Beaverton's normal year runs from 34°F December nights to 82°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.1°C, December lows of 1°C, July highs of 28°C.
- NOAA stationBeaverton (2 mi SSW)
- Station IDUSC00350595
- Location45.45°N 122.82°W
- Elevation270 ft (82 m)
- From the center2 miles
- Population98,302
On October 11, the normal high in Beaverton is 67°F and the normal low 44°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Beaverton.
- Jan 49° 34°
- Feb 53° 35°
- Mar 58° 37°
- Apr 64° 40°
- May 70° 46°
- Jun 75° 50°
- Jul 82° 54°
- Aug 82° 54°
- Sep 77° 50°
- Oct 65° 43°
- Nov 54° 38°
- Dec 48° 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 in Beaverton each month?
July is the warmest month, with normal highs of 82°F; December the coldest, with normal lows of 34°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 49°F | 34°F | 41.5°F | – | <1 | 11 | 9 h |
| February | 53°F | 35°F | 43.6°F | – | <1 | 8 | 10 h 20 min |
| March | 58°F | 37°F | 47.5°F | – | <1 | 5 | 11 h 50 min |
| April | 64°F | 40°F | 51.8°F | – | <1 | 1 | 13 h 30 min |
| May | 70°F | 46°F | 57.9°F | – | 1 | <1 | 14 h 50 min |
| June | 75°F | 50°F | 62.4°F | – | 2 | <1 | 15 h 40 min |
| July | 82°F | 54°F | 68.3°F | – | 5 | <1 | 15 h 20 min |
| August | 82°F | 54°F | 68.0°F | – | 5 | <1 | 14 h 10 min |
| September | 77°F | 50°F | 63.5°F | – | 2 | <1 | 12 h 40 min |
| October | 65°F | 43°F | 53.8°F | – | <1 | 1 | 11 h |
| November | 54°F | 38°F | 45.8°F | – | <1 | 6 | 9 h 30 min |
| December | 48°F | 34°F | 40.7°F | – | <1 | 9 | 8 h 40 min |
| Year (annual) | 65°F | 43°F | 53.7°F | – | 15 | 42 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 9°C | 1°C | 5.3°C |
| February | 12°C | 1°C | 6.4°C |
| March | 15°C | 3°C | 8.6°C |
| April | 18°C | 4°C | 11.0°C |
| May | 21°C | 8°C | 14.4°C |
| June | 24°C | 10°C | 16.9°C |
| July | 28°C | 12°C | 20.2°C |
| August | 28°C | 12°C | 20.0°C |
| September | 25°C | 10°C | 17.5°C |
| October | 18°C | 6°C | 12.1°C |
| November | 12°C | 3°C | 7.7°C |
| December | 9°C | 1°C | 4.8°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Portland Kgw-Tv (8 miles away), gets 4 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00350595; 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.
When is the best weather to visit Beaverton?
Normal highs sit between 65°F and 85°F in May, June, 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 USC00350595.
When is the last frost in Beaverton?
In Beaverton, the last spring frost (32°F) comes after April 1 in half of years and after April 26 in one year in ten; the first autumn frost comes before November 6 in half of years and before October 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
- April 11 year in 10 after April 26; 9 in 10 after March 5
- First autumn frost, half of years before
- November 61 year in 10 before October 19; 9 in 10 before December 1
NOAA puts the median frost-free season at 222 days, and the season without a hard freeze (28°F) at 275 days.
A hard freeze (28°F) comes after February 26 in half of springs and before November 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Beaverton in zones 8b to 9a across its 6 ZIP code areas (9a in 97008, the largest).
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00350595; 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.
What hardiness zone is each Beaverton ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Beaverton's 6 ZIP code areas run from zone 8b to 9a: 3 in 8b and 3 in 9a. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Beaverton?
In a normal year in Beaverton, 15 days a year reach 90°F (1 of them 100°F or more) and 42 nights fall to 32°F or colder.
- Days at 90°F or more
- 15a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 42a normal year
- Days that stay below freezing
- 1high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00350595.
How sunny is Beaverton?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Beaverton, 3.7 kWh per square metre a day. July is the sunniest month (83%) and December the cloudiest (52%). Among the 459 U.S. places of 50,000 or more, that ranks tied 428th (with 16 others) in sunshine.
| 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 much heating and cooling does Beaverton need?
A normal year in Beaverton brings 4,439 heating degree days, 17% fewer than the median U.S. place (5,373), and 349 cooling degree days, 62% 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 2,459 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 729 | 0 |
| February | 599 | 0 |
| March | 541 | 0 |
| April | 398 | 2 |
| May | 235 | 16 |
| June | 115 | 39 |
| July | 25 | 125 |
| August | 24 | 115 |
| September | 96 | 50 |
| October | 348 | 2 |
| November | 577 | 0 |
| December | 753 | 0 |
| Year (annual) | 4,439 | 349 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00350595. 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 Beaverton's climate compare?
Beaverton is warmer than 80 of the other 104 places with their own NOAA record in Oregon. Across the 7,247 U.S. stations with normals, its annual mean of 53.7°F is warmer than 56%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Beaverton share this climate record?
7 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.
- Tigard, ORalso near: Nature Park-Beaverton (6 mi, 55.8°F a year); Oregon City (10 mi, 55.4°F a year)57,301 people · 3 mi SE
- Tualatin, OR28,036 people · 6 mi S
- Bull Mountain, OR9,465 people · 3 mi S
- King City, OR5,002 people · 4 mi S
- Metzger, OR3,926 people · 3 mi E
- Durham, OR1,880 people · 5 mi SE
- Rivergrove, OR538 people · 6 mi SE
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 Beaverton's climate
What is the coldest month in Beaverton?
December, with a normal high of 48°F and a normal low of 34°F. The warmest is July (82°F by day, 54°F at night).
Does it snow in Beaverton?
Yes. NOAA publishes no 1991-2020 snowfall normal for Beaverton's NOAA station; the nearest record that keeps one, Portland Kgw-Tv (8 miles away), records 4 inches of snow in a normal year.
What plant hardiness zone is Beaverton in?
The USDA's 2023 map puts Beaverton in zones 8b to 9a across its 6 ZIP code areas (9a in 97008, the largest).
How late can frost come in Beaverton?
In half of years the last 32°F night comes after April 1; in one year in ten it comes after April 26. Waiting until April 26 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Nature Park-Beaverton, OR3 miles from this station, 55.8°F a year
- Hillsboro, OR9 miles from this station, 52.5°F a year
- Rex (1 mi S), OR11 miles from this station, 53.0°F a year
- North Willamette Experiment Station, OR12 miles from this station, 53.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made