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Lake Oswego, Oregon Weather

Fireweed Ignites. Day 15 of summer. Read this microseason across nine climate regions →

Lake Oswego weather forecast — hour by hour, 7-day outlook, NOAA radar

Lake Oswego, OR
Sunday, July 5 at 5:28 AM
53
°
Clear
Feels like
51°
Humidity
80%
Wind
1 mph
Sunrise
10:29 PM
Sunset
2:01 PM
Lake Oswego, OR
Hour by hour · 24h
24-Hour ForecastLake Oswego, OR: 24-hour forecast. Temperatures range from 53 to 78 degrees Fahrenheit.
L 53°H 78°
Lake Oswego, OR
7-day forecast
  1. Today
    Jul 5
    Overcast
    —
    —
    78°53°—
  2. Monday
    Jul 6
    Partly Cloudy
    —
    —
    85°56°+7°
  3. Tuesday
    Jul 7
    Overcast
    —
    —
    84°58°-1°
  4. Wednesday
    Jul 8
    Overcast
    —
    —
    79°56°-5°
  5. Thursday
    Jul 9
    Overcast
    —
    —
    83°55°+4°
  6. Friday
    Jul 10
    Overcast
    —
    —
    83°56°0°
  7. Saturday
    Jul 11
    Overcast
    —
    —
    80°59°-3°
Lake Oswego, OR
Next 24 hours · Cool now
45°65°85°12a6a12p6pnow 53°high 78°low 53°
Lake Oswego, OR
Anemometer · 24h winds · from true
NESW
From · True
S
169° · veering 178°
Direction
S
169°
Sustained
1
mph
Gust
5
mph
Peak 24h
23
avg 4
Beaufort · 1 · LIGHT AIR
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 4 · pk 23 @ 12:00a
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 213SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 178° from the s.
Lake Oswego, OR
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1011.2
+0.5 mb in 3h · steady · 29.86 inHg
Now
1011.2
mb
3h
+0.5
mb
12h
+0.9
mb
24h
-0.3
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1009–1013
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1012.91009.11011.2
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
Lake Oswego, OR
Air quality
20
AQI
Good
↓-11 in 6h

AQI 20 (Good), driven by PM2.5. AQI down 11 over the last 6 hours (gradual decline).

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERGood
3.6μg/m³
PM 10Good
4μg/m³
NO₂Good
8μg/m³
OzoneGood
32μg/m³
UV IndexLow
0.0

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).

7-DAY AQI TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³300
Lake Oswego, OR
Sky cover · visibility · 24h
Cloud cover
12%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
36.7mi
UNLIMITED
95 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
12:28 UTC · Lake Oswego, OR · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
12:28 UTC · Lake Oswego, OR · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Lake Oswego, OR
Satellite · infrared · animated
Lake Oswego, OR
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Lake Oswego, OR
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
4:52 AM
Sunrise
10:29 PM
Daylight
15h 32m
Sunset
2:01 PM
Civil dusk
9:40 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Lake Oswego, OR
The moon
Waning Gibbous
73% illuminated
Moonrise
11:35 PM
Moonset
11:27 AM
In sign
♓︎ Pisces
Lake Oswego, OR
Microseason
Jul 1–5

Fireweed Ignites

weather
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Lake Oswego at a glance

  • Today vs. normal: 13°F below the seasonal normal for this latitude
  • Last frost: May 18 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP codes: 97034, 97035

16-Day Forecast — Lake Oswego

  1. Sun78°53°0%
  2. Mon85°56°0%
  3. Tue84°58°0%
  4. Wed79°56°1%
  5. Thu83°55°0%
  6. Fri83°56°0%
  7. Sat80°59°4%
  8. Sun86°54°1%
  9. Mon90°59°2%
  10. Tue92°65°1%
  11. Wed90°63°0%
  12. Thu92°65°6%
  13. Fri94°66°3%
  14. Sat92°65°3%
  15. Sun87°62°3%
  16. Mon84°58°6%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of July 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.

January 1–5: The Year's Deep Silence.January 6–10: The First Pressure Shift.January 11–15: The Lengthening.January 16–20: The Crows Begin.January 21–25: Skunk Cabbage Wakens.January 26–31: The Fog Deepens.February 1–5: The Sap Stirs.February 6–10: East Wind Weakens the Marine Layer.February 11–15: Thrush Song at First Light.February 16–20: The Salmon Remember.February 21–25: The Soil Awakens.February 26–28: Mist Begins to Linger.March 1–5: The Buds Emerge.March 6–10: The Small Lives Stir.March 11–15: The Spring Salmon Peak.March 16–20: Alder Catkins Dust the Air.March 21–25: Equinox Fog Clears.March 26–31: Salmonberry First Bloom.April 1–5: Thunder Rolls Down the Valleys.April 6–10: Swallows Arrive at the Bridges.April 11–15: Geese Turn Their Faces North.April 16–20: Rainbows Arc Above the Cascades.April 21–25: Reeds Rise from the Wetlands.April 26–30: Frost Releases the Garden.May 1–5: Warblers Flood the Canopy.May 6–10: Frogs Sing at Twilight.May 11–15: Earthworms Rise to Feed the Forest.May 16–20: Shoots and Sprouts Rise in Ranks.May 21–25: Silkworm Days—Full Canopy.May 26–31: Safflower Days—Late May Blooms.June 1–5: Rufous Hummingbirds Arrive.June 6–10: Oceanspray Towers.June 11–15: Solstice Light Crests.June 16–20: Thimbleberry Sweetens.June 21–25: Summer Solstice Stillness.June 26–30: Dry Pattern Deepens.July 1–5: Fireweed Ignites.July 6–10: Peak Hummingbird Wars.July 11–15: Red Huckleberry Ripens.July 16–20: Smoke Season Beckons.July 21–25: Dog Days Hold.July 26–31: Smoke Deepens.August 1–5: August Arrives Dimmed.August 6–10: Cool Wind Hints Return.August 11–15: Cicadas Crescendo.August 16–20: Marine layer deepens.August 21–25: First sweater morning.August 26–31: August snap arrives.September 1–5: Rivers quicken with silver.September 6–10: Dew settles thick.September 11–15: Raptors funnel through passes.September 16–20: Equinox—darkness gains.September 21–25: Fog locks the valleys.September 26–30: Geese stage southward.October 1–5: Mushroom flush deepens.October 6–10: Maples ignite orange.October 11–15: Frost's first mark.October 16–20: Oaks turn russet.October 21–25: First killing frost.October 26–31: Atmospheric rivers arrive.November 1–5: Maple and ivy turn to amber.November 6–10: Last leaves cling in quiet rain.November 11–15: First frost finds the lowlands.November 16–20: Bare branches open the winter sky.November 21–25: Heavy rains mask the stars.November 26–30: North wind clears the gloom.December 1–5: Darkness settles early.December 6–10: Winter cold locks the sky.December 11–15: The days reach their minimum.December 16–20: Ice forms at the margins.December 21–25: The sun turns at solstice.December 26–31: Year's end in silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · July 1–5

Fireweed Ignites

Magenta fireweed spires surge from burned and cleared slopes, their blooms climbing from base upward. July's signature color claims the disturbed ground.

Day 186 of 365 · Wedge 37 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
April——
Maylettuce, peas, spinach, radisheslettuce, peas, radishes
Junelettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
Augusttomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
October—winter squash, tomatoes (last)
November——
December——

A year in weather

Lake Oswego peaks at about 69°F in August and bottoms near 39°F in January; December brings the heaviest rain (7.2 inches) and July the least (0.3 inches).

MonthMean tempPrecipRainy days
January39°7.2″23
February41°5.5″19
March44°5.9″22
April50°3.9″19
May56°2.7″17
June62°1.7″13
July68°0.3″4
August69°0.5″5
September63°1.9″10
October53°5.7″17
November45°7.1″21
December39°7.2″22

Regional context

By the nearest station's NOAA NCEI 1991-2020 normals, Lake Oswego sees 39°F Januarys and 68°F Julys, a 29°F range, plus around 49.7 inches of precipitation across 192 days.

Cool-season fronts carry Lake Oswego's rain: December logs 7.2 inches on 21.9 days, against July's 0.3 inches on 4.2 — winter does the heavy lifting in Lake Oswego. That cool-season-wet pattern aligns Lake Oswego with places like Rivergrove, OR, Stafford, OR and Dunthorpe, OR.

The cool-season window in Lake Oswego starts at late-May, when nights stop freezing — think peas, lettuce, spinach, and radishes. In Lake Oswego, warm-season transplants — tomatoes, peppers, basil — wait two weeks past Lake Oswego's frost date. It shuts near early-October, when freezes return to Lake Oswego and tender plants need cover. In Lake Oswego, low spots run 4-7°F colder than nearby slopes, nudging Lake Oswego's frost dates a week.

Similar climates: Rivergrove, OR, Stafford, OR, Dunthorpe, OR, Durham, OR, Oak Grove, OR.

Frequently asked

When does it freeze in Lake Oswego?
In Lake Oswego, expect the last spring frost near mid-May; Lake Oswego's first autumn frost comes around mid-October.
What is the rainy season in Lake Oswego?
December is the wettest month in Lake Oswego, about 7.2 inches on average; the year totals roughly 50 inches.
What is the warmest month in Lake Oswego?
August is Lake Oswego's warmest month, averaging about 69°F.
What is the coldest month in Lake Oswego?
Lake Oswego bottoms out in January, with a mean near 39°F.
When can I start a vegetable garden in Lake Oswego?
Frost-hardy sowings begin at mid-May in Lake Oswego; warm-season starts follow two weeks on.
How many rainy days does Lake Oswego get?
Lake Oswego records around 192 days of measurable precipitation annually.
What hardiness zone is Lake Oswego?
Lake Oswego's USDA zone comes from its January mean (39°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Lake Oswego?
Lake Oswego's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Lake Oswego?
See this week's day-by-day rain chances for Lake Oswego in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Lake Oswego?
Current conditions for Lake Oswego and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Lake Oswego forecast updated?
The Lake Oswego forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Lake Oswego?
Today's sunrise and sunset times for Lake Oswego are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Lake Oswego?
The next few days in Lake Oswego's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Lake Oswego, Oregon has a warm-summer Mediterranean climate: January averages roughly 39°F, July about 68°F, 29°F between them.

In a typical year Lake Oswego records about 50 inches of precipitation on around 192 days.

Latitude 45.4°N gives Lake Oswego its 29°F swing, and with it the rhythm of Lake Oswego's growing season.

All cities in Oregon →

Portland, OR weather →

ZIP codes in Lake Oswego

  • 97034
  • 97035
  • 97036

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.