Easton, Washington Weather
Rufous Hummingbirds Arrive. Day 77 of spring. Read this microseason across nine climate regions →
Easton weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast19%—68°53°—
- ThursdayJun 4Overcast——60°47°-8°
- FridayJun 5Overcast38%—55°40°-5°
- SaturdayJun 6Drizzle59%0.05″51°39°-4°
- SundayJun 7Light Drizzle—0.02″60°39°+9°
- MondayJun 8Light Drizzle51%0.03″54°44°-6°
- TuesdayJun 9Light Drizzle50%0.01″54°43°0°
PM2.5 at 8.5 µg/m³, PM10 at 11.5 µg/m³ — typical background levels with no transport signature. AQI up 8 over the last 6 hours (gradual rise).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 41 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 by mid-afternoon.
- Present
- AQI 41
- UV peak
- 0.1 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 10
PM × Wind × Precip
PM2.5 at 8.5 µg/m³, PM10 at 11.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.74
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 7:03 AM
- Moonset
- 3:47 PM
- In sign
- ♑︎ Capricorn
Rufous Hummingbirds Arrive
Easton at a glance
- Today vs. normal: 12°F below the seasonal normal for this latitude
- Last frost: May 29 (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 4, 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
Easton's warmest month is August (~63°F mean) and its coldest is January (~30°F). Rainfall peaks in January (8.1 inches) and bottoms out in July (0.7 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 30° | 8.1″ | 25 |
| February | 33° | 5.8″ | 19 |
| March | 37° | 4.9″ | 16 |
| April | 43° | 3.4″ | 11 |
| May | 50° | 2.2″ | 7 |
| June | 56° | 1.8″ | 6 |
| July | 63° | 0.7″ | 2 |
| August | 63° | 0.9″ | 3 |
| September | 56° | 1.9″ | 6 |
| October | 46° | 4.9″ | 16 |
| November | 36° | 7.8″ | 25 |
| December | 30° | 7.4″ | 25 |
Regional context
Easton's climate, per the NOAA NCEI 1991-2020 normals from the nearest reporting station, runs cold-winter and warm-summer. January means hover near 30°F while July climbs to 63°F — a 33°F seasonal swing typical of northern-tier latitudes. Annual precipitation totals about 49.8 inches spread across roughly 161 days with measurable rain or snow.
Precipitation peaks in the cool season: January averages 8.1 inches across 25.0 days with measurable rain, mostly from frontal systems and winter storms, while July bottoms out at 0.7 inches across just 2.0 rainy days during the drier warm-season stretch. The cool-season-wet pattern aligns Easton with places like Roslyn, WA, Ronald, WA and Cle Elum, WA — places where Pacific or frontal storm tracks deliver the year's moisture between November and March.
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. Warm-season transplants — tomatoes, peppers, and basil — typically wait two weeks past that date to avoid late spring cold snaps. The window closes around early-October, when overnight lows resume dipping below freezing and frost-tender plants need protection or harvest. The dates above are 1991-2020 normals; in a given year either bookend can move 1-2 weeks either direction. Within Easton, low-lying parcels along drainage features typically lose 4-7°F of overnight low temperature versus the bench positions on calm clear nights, which shifts the working last-frost date by a week or more.
Similar climates: Roslyn, WA, Ronald, WA, Cle Elum, WA, South Cle Elum, WA, Snoqualmie Pass, WA.
Frequently asked
- When does it freeze in Easton?
- Easton's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in Easton?
- January is the wettest month with about 8.1 inches of rain on average; the city receives roughly 50 inches annually.
- What is the warmest month in Easton?
- August is typically warmest, averaging about 63°F.
- What is the coldest month in Easton?
- January is typically coldest, averaging about 30°F.
- When can I start a vegetable garden in Easton?
- 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 Easton get?
- Easton averages about 161 rainy days per year.
- What hardiness zone is Easton?
- Easton'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
Easton, Washington sits in a warm-summer Mediterranean climate zone. January means hover near 30°F while July averages 63°F — a 33°F seasonal swing.
Across the year, Easton receives about 50 inches of precipitation spread over roughly 161 rainy days.
The rhythm of the year is set by latitude (47.2°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.