Gaston Oregon Weather
Learn about gaston oregon weather
If you’re wondering what gaston oregon weather is like, here’s the short version: it’s a classic Pacific Northwest climate—mild, wet winters and warm, dry summers. This guide explains the seasons, what to pack, local quirks around Hagg Lake and nearby hills, and how to plan your visit or daily life around the weather.
Quick Answer
Gaston has cool, rainy winters and warm, mostly dry summers. Expect winter highs around the upper 40s with frequent showers and occasional frost; summer highs in the upper 70s to mid-80s with cool nights. Rain falls mainly November–March. It’s slightly wetter than Portland, with foggy mornings, rare lowland snow, and occasional late-summer wildfire smoke.
What gaston oregon weather Means
When people search “gaston oregon weather,” they want to know:
- What the seasons feel like day-to-day
- How it compares to nearby Portland, Forest Grove, and Hillsboro
- What to expect at Henry Hagg Lake and local wineries
- How to plan clothing, driving, and outdoor activities
This page gives you practical, local details in plain language.
Why People Search for This in Gaston, Oregon
Gaston sits in the Tualatin Valley, about 30 miles southwest of Portland, 10–15 minutes south of Forest Grove, and roughly 25–35 minutes from Hillsboro (traffic varies). It’s close to:
- Henry Hagg Lake (Scoggins Valley Park) for hiking, boating, and fishing
- Coast Range foothills with slightly cooler, wetter conditions
- Vineyard country (tasting rooms are cozy in winter; patios shine in summer)
Weather affects lake conditions, tasting-room days, farm roads, and morning commutes on OR-47 and Scoggins Valley Road.
What to Expect
Overall climate
- Mild, maritime climate
- Rain mostly Nov–Mar; drier Apr–Oct
- A bit wetter than Portland because of the Coast Range nearby
- Total rainfall: commonly around 45–50 inches a year
- Snow: rare in town; a few light events some winters
- Wind: generally light; occasional east-wind events can dry things out
- Smoke: some late-summer seasons see wildfire smoke/haze across the valley
Winter (Dec–Feb)
- Highs: upper 40s; Lows: mid-30s
- Frequent rain, drizzle, and foggy mornings
- Occasional frost/black ice on OR-47 and around Hagg Lake’s shaded curves
- Rare lowland snow; more likely sticking on higher nearby hills
Spring (Mar–May)
- Highs: 55–70; Lows: 40s–50s
- Showers with sunbreaks; trails can be muddy
- Wildflowers pop and vineyards bud; grass pollen allergies ramp up late spring
Summer (Jun–Sep)
- Highs: upper 70s to mid-80s; cool nights in the 50s
- Mostly dry—prime time for Hagg Lake and winery patios
- Heat waves do happen (90s/100s a few days most summers)
- Occasional late-summer smoke can reduce air quality and views
Fall (Oct–Nov)
- Highs: 50s–60s; Lows: 40s
- Crisp mornings, colorful vineyards, increasing showers
- First real storms and breezy days return by late fall
Microclimate notes
- Hagg Lake: mornings are cooler with damp air; winds can pick up on the water in the afternoon
- Foothills west of town: see more rain and can ice up sooner than the valley floor
- Fog pockets are common on calm, cool mornings—leave extra commute time
Tips for Visitors / Residents
What to wear
- Year-round: layers; a light, breathable rain jacket; waterproof shoes in the rainy months
- Winter: warm hat/gloves for early mornings; consider traction soles
- Summer: sun hat, sunscreen, and extra water; evenings can still be cool
Driving and road sense
- Check OR-47 and Scoggins Valley Road for black ice on cold, clear mornings
- After heavy rain, expect slick leaves and standing water
- Heading to the Coast via Hwy 6? Conditions can change fast in the Coast Range—check before you go
Lake and outdoor planning
- Mornings are calmer for paddling; watch for afternoon breezes on Hagg Lake
- Trails can be muddy Nov–Apr—bring boots
- Late summer can bring fire restrictions; follow posted rules
Winery days
- Rainy season: tasting rooms are open and cozy; rural parking can be muddy
- Sunny season: patios fill up—reserve ahead on weekends
Health and comfort
- Allergies: grass pollen peaks late spring to early summer
- Smoke: check air quality in late summer and plan less-strenuous activities on hazy days
Frequently Asked Questions About gaston oregon weather
How far is Gaston from Portland?
- About 30 miles southwest; typically 45–60 minutes by car, depending on traffic.
Does it snow in Gaston?
- Snow is uncommon at town elevation. Expect a few light events in some winters; higher nearby hills get more.
When is the best time to visit Hagg Lake?
- Late spring through early fall for dry trails and warm water. Mornings are best for calmer winds.
Is summer smoky?
- Some years see wildfire smoke in late summer. Check air quality before outdoor workouts or long hikes.
What should I pack?
- Layers, a light rain jacket, and waterproof shoes outside of summer. In summer, bring sunscreen, a hat, and extra water.
Best Local Resources
- National Weather Service (Portland office) – Local forecast, wind, and hazard alerts
- ODOT TripCheck – Live road cameras and conditions for OR-47, Scoggins Valley Rd, and Hwy 6
- AirNow or Oregon DEQ Air Quality – Real-time air quality and smoke maps
- Washington County Parks (Scoggins Valley Park / Hagg Lake) – Closures, wind advisories, and park updates
- Tualatin Valley Fire & Rescue / Oregon Dept. of Forestry – Fire danger and burn restrictions (seasonal)
Summary
Gaston’s weather is mild and seasonal: rainy and cool in winter, dry and warm in summer, with foggy mornings and the occasional heat spike or smoky day. Plan layers, check roads on cold mornings, and time lake trips for calmer mornings. Summer and early fall are the easiest months for outdoor plans.
Related Guides
- Henry Hagg Lake — When to go, best trails, boating basics
- Wineries near Gaston — Rainy-day tasting rooms and sunny patio spots
- Living in Gaston — Commute tips, services, and everyday essentials