Hat Island, Washington Weather
Rufous Hummingbirds Arrive. Day 78 of spring. Read this microseason across nine climate regions →
Hat Island weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Light Drizzle35%0.04″60°51°—
- FridayJun 5Overcast36%—59°49°-1°
- SaturdayJun 6Light Drizzle61%—57°45°-2°
- SundayJun 7Light Drizzle11%—65°44°+8°
- MondayJun 8Overcast37%—67°41°+2°
- TuesdayJun 9Overcast52%—75°43°+8°
- WednesdayJun 10Overcast50%—60°47°-15°
AQI 36 (Good), driven by PM2.5. AQI up 9 over the last 6 hours (gradual rise). PM2.5 at 10.0 µg/m³ (AQI 53) with a 0.82 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
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 31. Overcast through the UV peak window (cloud cover ~88%) — afternoon ozone should stay flat.
- Present
- AQI 31
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
PM × Wind × Precip
PM2.5 at 10.0 µg/m³ (AQI 53) with a 0.82 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.82
- 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
- 7:36 AM
- Moonset
- 5:01 PM
- In sign
- ♒︎ Aquarius
Rufous Hummingbirds Arrive
Hat Island at a glance
- Today vs. normal: 13°F below the seasonal normal for this latitude
- Last frost: June 3 (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 5, 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.
SPC Convective Outlook
Storm Prediction Center — Hat Island
SPC has placed Hat Island in the General Thunderstorms category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
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
Hat Island's warmest month is August (~65°F mean) and its coldest is December (~40°F). Rainfall peaks in November (5.8 inches) and bottoms out in July (1.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 41° | 5.0″ | 17 |
| February | 43° | 3.7″ | 12 |
| March | 46° | 4.1″ | 14 |
| April | 51° | 3.4″ | 11 |
| May | 56° | 2.7″ | 9 |
| June | 61° | 2.3″ | 8 |
| July | 65° | 1.0″ | 3 |
| August | 65° | 1.1″ | 4 |
| September | 60° | 2.3″ | 8 |
| October | 52° | 3.7″ | 12 |
| November | 45° | 5.8″ | 19 |
| December | 40° | 5.0″ | 17 |
Frequently asked
- When does it freeze in Hat Island?
- Hat Island's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in Hat Island?
- November is the wettest month with about 5.8 inches of rain on average; the city receives roughly 40 inches annually.
- What is the warmest month in Hat Island?
- August is typically warmest, averaging about 65°F.
- What is the coldest month in Hat Island?
- December is typically coldest, averaging about 40°F.
- When can I start a vegetable garden in Hat Island?
- 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 Hat Island get?
- Hat Island averages about 134 rainy days per year.
- What hardiness zone is Hat Island?
- Hat Island'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
Hat Island, Washington sits in a warm-summer Mediterranean climate zone. January means hover near 41°F while July averages 65°F — a 24°F seasonal swing.
Across the year, Hat Island receives about 40 inches of precipitation spread over roughly 134 rainy days.
The rhythm of the year is set by latitude (48.0°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.