Oatfield, Oregon Weather
Rufous Hummingbirds Arrive. Day 76 of spring. Read this microseason across nine climate regions →
Oatfield weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Light Drizzle19%0.01″72°58°—
- ThursdayJun 4Overcast——70°53°-2°
- FridayJun 5Light Drizzle15%—65°46°-5°
- SaturdayJun 6Light Showers71%0.01″62°46°-3°
- SundayJun 7Overcast——70°43°+8°
- MondayJun 8Drizzle47%0.18″56°48°-14°
- TuesdayJun 9Light Drizzle38%—63°48°+7°
Ozone at AQI 500 now. AQI flat over the last 6 hours (within ±3 points). With UV 7.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 331 by mid-afternoon.
AVOID OUTDOORS Avoid outdoor exertion. Keep windows closed; use HEPA filtration indoors if available.
What's driving it
Ozone × UV × Sky
Ozone at AQI 500 now. With UV 7.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 331 by mid-afternoon.
- Present
- AQI 500
- UV peak
- 7.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 331
PM × Wind × Precip
PM2.5 at 15.5 µg/m³ (AQI 63) with a 0.71 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.71
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 6:29 AM
- Moonset
- 2:53 PM
- In sign
- ♑︎ Capricorn
Rufous Hummingbirds Arrive
Oatfield at a glance
- Today vs. normal: 69°F — typical for the season
- Last frost: May 18 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | — | — |
| May | lettuce, peas, spinach, radishes | lettuce, peas, radishes |
| June | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | tomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | — | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Oatfield's warmest month is August (~71°F mean) and its coldest is December (~42°F). Rainfall peaks in December (7.2 inches) and bottoms out in July (0.5 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 43° | 6.5″ | 22 |
| February | 45° | 4.5″ | 15 |
| March | 49° | 4.8″ | 16 |
| April | 53° | 3.8″ | 13 |
| May | 60° | 2.5″ | 8 |
| June | 65° | 1.8″ | 6 |
| July | 71° | 0.5″ | 2 |
| August | 71° | 0.6″ | 2 |
| September | 65° | 1.6″ | 5 |
| October | 56° | 4.2″ | 14 |
| November | 47° | 6.7″ | 22 |
| December | 42° | 7.2″ | 24 |
Regional context
Oatfield's climate, per the NOAA NCEI 1991-2020 normals from the nearest reporting station, runs cold-winter and warm-summer. January means hover near 43°F while July climbs to 71°F — a 28°F seasonal swing typical of northern-tier latitudes. Annual precipitation totals about 44.8 inches spread across roughly 149 days with measurable rain or snow.
Precipitation peaks in the cool season: December averages 7.2 inches across 24.0 days with measurable rain, mostly from frontal systems and winter storms, while July bottoms out at 0.5 inches across just 2.0 rainy days during the drier warm-season stretch. That winter-storm-driven distribution puts Oatfield alongside places like Johnson City, OR, Jennings Lodge, OR and Gladstone, OR, all of which run drier through the summer months and rely on cool-season frontal activity for the year's precipitation.
The frost-sensitive growing window opens around late-May, when overnight lows reliably clear freezing for cool-season crops like peas, lettuce, spinach, and radishes. Heat-loving transplants like tomatoes, peppers, and squash generally hold off for another 10-14 days to clear the last spring frost risk window. The window closes around early-October, when overnight lows resume dipping below freezing and frost-tender plants need protection or harvest. These are 30-year central tendencies; year-to-year frost dates can move by up to two weeks. Local features matter: a south-facing slope inside Oatfield typically runs 3-5 days ahead of the regional last-frost date, while a low-lying lot along a creek or drainage can lag the same date by a week or more on calm clear nights.
Similar climates: Johnson City, OR, Jennings Lodge, OR, Gladstone, OR, Oak Grove, OR, Milwaukie, OR.
Frequently asked
- When does it freeze in Oatfield?
- Oatfield's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in Oatfield?
- December is the wettest month with about 7.2 inches of rain on average; the city receives roughly 45 inches annually.
- What is the warmest month in Oatfield?
- August is typically warmest, averaging about 71°F.
- What is the coldest month in Oatfield?
- December is typically coldest, averaging about 42°F.
- When can I start a vegetable garden in Oatfield?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-May); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Oatfield get?
- Oatfield averages about 149 rainy days per year.
- What hardiness zone is Oatfield?
- Oatfield's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Oatfield, Oregon sits in a warm-summer Mediterranean climate zone. January means hover near 43°F while July averages 71°F — a 28°F seasonal swing.
Across the year, Oatfield receives about 45 inches of precipitation spread over roughly 149 rainy days.
The rhythm of the year is set by latitude (45.4°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.