Montesano, Washington Weather
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Montesano weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——61°49°—
- FridayJun 5Light Rain51%0.17″55°48°-6°
- SaturdayJun 6Heavy Drizzle81%0.04″59°45°+4°
- SundayJun 7Light Drizzle23%—65°40°+6°
- MondayJun 8Overcast71%—58°45°-7°
- TuesdayJun 9Overcast55%—71°47°+13°
- WednesdayJun 10Partly Cloudy28%—66°46°-5°
Ozone at AQI 34 now. AQI flat over the last 6 hours (within ±3 points). With UV 3.7 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 12 by mid-afternoon.
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 34 now. With UV 3.7 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 12 by mid-afternoon.
- Present
- AQI 34
- UV peak
- 3.7 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 12
PM × Wind × Precip
PM2.5/PM10 ratio 0.67 with 8 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.67
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 7:12 AM
- Moonset
- 3:58 PM
- In sign
- ♒︎ Aquarius
Rufous Hummingbirds Arrive
Montesano at a glance
- Today vs. normal: 9°F below the seasonal normal for this latitude
- Last frost: May 28 (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.
SPC Convective Outlook
Storm Prediction Center — Montesano
SPC has placed Montesano 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
Montesano's warmest month is August (~66°F mean) and its coldest is December (~41°F). Rainfall peaks in November (11.4 inches) and bottoms out in July (0.8 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 42° | 11.1″ | 17 |
| February | 43° | 7.0″ | 13 |
| March | 46° | 8.2″ | 16 |
| April | 50° | 5.4″ | 13 |
| May | 56° | 3.3″ | 9 |
| June | 60° | 2.2″ | 6 |
| July | 65° | 0.8″ | 2 |
| August | 66° | 1.4″ | 3 |
| September | 61° | 2.7″ | 6 |
| October | 53° | 7.2″ | 11 |
| November | 45° | 11.4″ | 17 |
| December | 41° | 11.4″ | 17 |
Regional context
Montesano's climate, per the NOAA NCEI 1991-2020 normals from the nearest reporting station, runs cold-winter and warm-summer. January means hover near 42°F while July climbs to 65°F — a 23°F seasonal swing typical of northern-tier latitudes. Annual precipitation totals about 72 inches spread across roughly 129 days with measurable rain or snow.
Precipitation peaks in the cool season: November averages 11.4 inches across 16.8 days with measurable rain, mostly from frontal systems and winter storms, while July bottoms out at 0.8 inches across just 2.0 rainy days during the drier warm-season stretch. The pattern groups Montesano with places like Brady, WA, Satsop, WA and Central Park, WA, places whose summer-dry rhythm and cool-season-wet recharge run on the same regional storm-track exposure.
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-soil crops — tomatoes, peppers, eggplant — wait until soil temperatures reach the mid-50s°F, usually two weeks past the last-frost date. 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 Montesano 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: Brady, WA, Satsop, WA, Central Park, WA, Elma, WA, Cosmopolis, WA.
Frequently asked
- When does it freeze in Montesano?
- Montesano's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in Montesano?
- November is the wettest month with about 11.4 inches of rain on average; the city receives roughly 72 inches annually.
- What is the warmest month in Montesano?
- August is typically warmest, averaging about 66°F.
- What is the coldest month in Montesano?
- December is typically coldest, averaging about 41°F.
- When can I start a vegetable garden in Montesano?
- 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 Montesano get?
- Montesano averages about 129 rainy days per year.
- What hardiness zone is Montesano?
- Montesano'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
Montesano, Washington sits in a warm-summer Mediterranean climate zone. January means hover near 42°F while July averages 65°F — a 23°F seasonal swing.
Across the year, Montesano receives about 72 inches of precipitation spread over roughly 129 rainy days.
The rhythm of the year is set by latitude (47.0°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.