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Bryn Mawr-Skyway, Washington Weather

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

Bryn Mawr-Skyway weather forecast — hour by hour, 7-day outlook, NOAA radar

Bryn Mawr-Skyway, WA
Sunday, July 5 at 3:13 AM
53
°
Overcast
Feels like
51°
Humidity
81%
Wind
4 mph
Sunrise
10:18 PM
Sunset
2:08 PM
Bryn Mawr-Skyway, WA
Hour by hour · 24h
24-Hour ForecastBryn Mawr-Skyway, WA: 24-hour forecast. Temperatures range from 51 to 75 degrees Fahrenheit.
L 51°H 75°
Bryn Mawr-Skyway, WA
7-day forecast
  1. Today
    Jul 5
    Overcast
    —
    —
    75°51°—
  2. Monday
    Jul 6
    Overcast
    —
    —
    83°53°+8°
  3. Tuesday
    Jul 7
    Overcast
    —
    —
    82°53°-1°
  4. Wednesday
    Jul 8
    Light Drizzle
    —
    —
    69°55°-13°
  5. Thursday
    Jul 9
    Clear
    —
    —
    79°48°+10°
  6. Friday
    Jul 10
    Clear
    —
    —
    81°52°+2°
  7. Saturday
    Jul 11
    Overcast
    —
    —
    83°54°+2°
Bryn Mawr-Skyway, WA
Next 24 hours · Cool now
45°63°80°12a6a12p6pnow 53°high 75°low 51°
Bryn Mawr-Skyway, WA
Anemometer · 24h winds · from true
NESW
From · True
N
353° · veering 128°
Direction
N
353°
Sustained
4
mph
Gust
17
mph
Peak 24h
18
avg 4
Beaufort · 2 · LIGHT BRZ
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 18 @ 1:00a
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 184SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 128° from the n.
Bryn Mawr-Skyway, WA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1006.2
-0.3 mb in 3h · steady · 29.71 inHg
Now
1006.2
mb
3h
-0.3
mb
12h
-1.0
mb
24h
+1.2
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1005–1007
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR-21h-18h-15h-12h-9h-6h-3h-24hNOW1007.41005.01006.2
−24h−18h−12h−6hnow
Damp, unsettled regime — wet weather lingers nearby.
Bryn Mawr-Skyway, WA
Air quality
26
AQI
Good
↓-11 in 6h

AQI 26 (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
13μg/m³
OzoneGood
31μg/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
Bryn Mawr-Skyway, WA
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
36.7mi
UNLIMITED
58 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
10:13 UTC · Bryn Mawr-Skyway, WA · 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
10:13 UTC · Bryn Mawr-Skyway, WA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Bryn Mawr-Skyway, WA
Satellite · infrared · animated
Bryn Mawr-Skyway, WA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Bryn Mawr-Skyway, WA
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
4:39 AM
Sunrise
10:18 PM
Daylight
15h 50m
Sunset
2:08 PM
Civil dusk
9:49 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Bryn Mawr-Skyway, WA
The moon
Waning Gibbous
74% illuminated
Moonrise
11:35 PM
Moonset
11:25 AM
In sign
♓︎ Pisces
Bryn Mawr-Skyway, WA
Microseason
Jul 1–5

Fireweed Ignites

weather
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Bryn Mawr-Skyway at a glance

  • Today vs. normal: 11°F below the seasonal normal for this latitude
  • Last frost: May 31 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

15-Day Forecast — Bryn Mawr-Skyway

  1. Sun75°51°0%
  2. Mon83°53°0%
  3. Tue82°53°0%
  4. Wed69°55°9%
  5. Thu79°48°3%
  6. Fri81°52°2%
  7. Sat83°54°5%
  8. Sun80°52°5%
  9. Mon85°51°4%
  10. Tue86°54°3%
  11. Wed85°58°5%
  12. Thu89°59°10%
  13. Fri90°61°3%
  14. Sat76°58°10%
  15. Sun84°54°3%

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

August is Bryn Mawr-Skyway's warmest stretch (~67°F) and January its coldest (~38°F); precipitation crests in November at 7.9 inches and ebbs in July to 0.5 inches.

MonthMean tempPrecipRainy days
January38°7.5″23
February40°5.5″20
March43°5.6″23
April48°4.1″20
May55°3.1″19
June60°2.4″16
July66°0.5″7
August67°0.9″6
September60°2.4″12
October51°6.2″19
November44°7.9″23
December38°7.5″24

Regional context

Bryn Mawr-Skyway's climate, from NOAA NCEI 1991-2020 station normals, pairs 38°F Januarys with 66°F Julys — a 28°F swing. About 53.6 inches of precipitation falls over roughly 211 days a year.

Precipitation in Bryn Mawr-Skyway peaks in the cool season: November averages 7.9 inches across 22.6 storm-fed days, while July bottoms out at 0.5 inches over just 6.8 rainy days. It is a winter-storm rhythm Bryn Mawr-Skyway shares with places like Tukwila, WA, Renton, WA and Boulevard Park, WA.

The cool-season window in Bryn Mawr-Skyway starts at late-May, when nights stop freezing — think peas, lettuce, spinach, and radishes. Hold Bryn Mawr-Skyway's tender crops — tomatoes, peppers, basil — until 10-14 days past Bryn Mawr-Skyway's last frost. Around early-October, freezing nights resume in Bryn Mawr-Skyway and tender crops must come in. Within Bryn Mawr-Skyway, cold-air pooling chills low spots by 5-10°F, shifting Bryn Mawr-Skyway's local frost dates.

Similar climates: Tukwila, WA, Renton, WA, Boulevard Park, WA, Newcastle, WA, SeaTac, WA.

Frequently asked

When does it freeze in Bryn Mawr-Skyway?
Bryn Mawr-Skyway's last spring frost lands near mid-May, and in Bryn Mawr-Skyway the first fall frost follows around mid-October.
What is the rainy season in Bryn Mawr-Skyway?
Bryn Mawr-Skyway sees its heaviest rain in November (around 7.9 inches), part of roughly 54 inches a year.
What is the warmest month in Bryn Mawr-Skyway?
On average August tops the year in Bryn Mawr-Skyway at about 67°F.
What is the coldest month in Bryn Mawr-Skyway?
The coldest stretch in Bryn Mawr-Skyway falls in January, around 38°F on average.
When can I start a vegetable garden in Bryn Mawr-Skyway?
Around mid-May, start frost-hardy crops in Bryn Mawr-Skyway; tomatoes and basil belong a fortnight later.
How many rainy days does Bryn Mawr-Skyway get?
Bryn Mawr-Skyway averages about 211 days with measurable rain or snow each year.
What hardiness zone is Bryn Mawr-Skyway?
Because Bryn Mawr-Skyway bottoms near 38°F in January, that winter low sets Bryn Mawr-Skyway's USDA zone — verify by ZIP.
What is the 10-day forecast for Bryn Mawr-Skyway?
Bryn Mawr-Skyway'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 Bryn Mawr-Skyway?
See this week's day-by-day rain chances for Bryn Mawr-Skyway in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Bryn Mawr-Skyway?
Current conditions for Bryn Mawr-Skyway and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Bryn Mawr-Skyway forecast updated?
The Bryn Mawr-Skyway forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Bryn Mawr-Skyway?
Today's sunrise and sunset times for Bryn Mawr-Skyway 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 Bryn Mawr-Skyway?
The next few days in Bryn Mawr-Skyway's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

The warm-summer Mediterranean climate of Bryn Mawr-Skyway, Washington carries typical Januarys near 38°F and Julys around 66°F — 28°F of seasonal travel.

Rain and snow bring Bryn Mawr-Skyway roughly 54 inches a year across approximately 211 measurable-precipitation days.

From 47.5°N, Bryn Mawr-Skyway sees a 28°F seasonal swing that governs Bryn Mawr-Skyway's planting and frost windows.

All cities in Washington →

Renton, WA weather →

ZIP codes in Bryn Mawr-Skyway

  • 98178

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.