Today | Weather | Monday, December 15, 2025
Active Weather Warnings

Weather in Renton, Washington

01:41 PM
Now
Rainy Weather
57° F
Feels Like 52°
Precipitation 46 %
Wind 15 mph
UV Index (0 - 11+) 0
Humidity 91 %
Today
Rainy Weather
Day 61°
Night 46°
Precipitation 100 %
Wind 12 mph
UV Index (0 - 11+) 0

Renton Weather Forecast Updated

9 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 15, 2024)
Rainy Weather

Day

48°

Night

39°

Wind

4 mph

Precipitation

97 %

Air Quality in Renton

NOW
29 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.71 µg/m³
PM10 2.1 µg/m³
O3 0.031 ppm
NO2 0.6 ppb
SO2 0.1 ppb
CO 0.09 ppm
NH3 0.03 µg/m³
NO 0.03 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.51.71 µg/m³
PM102.1 µg/m³
O360.66 µg/m³
NO21.11 µg/m³
SO20.27 µg/m³
CO100.11 µg/m³
NH30.03 µg/m³
NO0.03 µg/m³

Weather Alerts and Warnings for Renton

Severe Immediate Observed

Flood Warning

Flood Warning issued December 15 at 9:22AM PST by NWS Seattle WA
Dec 15, 9:22 AM Dec 15, 5:30 PM
...The Flood Warning is extended for the following rivers in
Washington...

Cedar River Near Landsburg affecting King County.

...The Flood Warning continues for the following rivers in
Washington...

Cedar River At Renton affecting King County.

Green River Near Auburn affecting King County.

White River Near Mud Mtn. Dam Outflow affecting Pierce and King
Counties.

.Dam operations to reduce the flood pool for area dams will
maintain elevated flow levels below the dams.

WHAT: Minor flooding is occurring and minor flooding is forecast.

WHERE: Green River near Auburn.

WHEN: Until further notice.

IMPACTS: At 10,000.0 cfs, the Green River will flood low areas of
the middle Green River valley with water over SE Green Valley Rd.
Some flooding is possible at a few low spots along the banks of
the Green River in Auburn, including near Issac Evans Park in
lower Mill Creek basin between Auburn and Kent due to backwater. A
flow of 9000 cfs feet on the Green River corresponds to a phase 3
flood in the King County flood system.

ADDITIONAL DETAILS:
- At 7:45 AM PST Monday the flow was 9,910.0 cfs.
- Flood flow is 9,000.0 cfs.
- Recent Activity...The maximum river flow in the 24 hours
ending at 11:45 PM PST Sunday was 11,300 cfs.
- Forecast...The river will remain near 10,00 cfs through
Tuesday with possible rises Wednesday.
- http://www.weather.gov/safety/flood
+ Read More
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Even 6 inches of fast-moving flood water can knock you off your feet and a depth of 2 feet will float your car. Never try to walk, swim, or drive through such swift water. If you come upon flood waters, stop, turn around and go another way. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov. The next statement will be issued by this afternoon at 530 PM PST.
Updated: Dec 15, 1:32 PM Source: NWS Alert
Severe Future Possible

Flood Watch

Flood Watch issued December 15 at 5:28AM PST until December 18 at 4:00PM PST by NWS Seattle WA
Dec 15, 10:00 AM Dec 18, 4:00 PM
WHAT: Flooding caused by excessive rainfall continues to be
possible.

WHERE: Portions of northwest and west central Washington,
including the following counties, in northwest Washington,
Clallam, Grays Harbor, Jefferson, Kitsap, Mason, Skagit and
Whatcom. In west central Washington, King, Lewis, Pierce,
Snohomish and Thurston.

WHEN: From 10 AM PST this morning through Thursday afternoon.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas. Storm drains and ditches may
become clogged with debris. Area creeks and streams are running
high and could flood with more heavy rain.

ADDITIONAL DETAILS:
- A series of weather systems this week will bring another
round of significant rainfall to western Washington through
Wednesday. Preliminary liquid totals of 2 to 6 inches,
locally higher in some spots, will cause additional sharp
rises to area rivers.
Urban and small stream flooding remains possible for areas
with poor drainage.

Very saturated soils will maintain increased risk for
potential landslides and debris flows off of burn scars.

- Http://www.weather.gov/safety/flood
+ Read More
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Updated: Dec 15, 1:32 PM Source: NWS Alert
Moderate Expected Likely

Wind Advisory

Wind Advisory issued December 15 at 9:32AM PST until December 15 at 10:00PM PST by NWS Seattle WA
Dec 15, 9:32 AM Dec 15, 10:00 PM
WHAT: For the Wind Advisory, southwest winds 20 to 30 mph with
gusts up to 55 mph. For the High Wind Watch, southwest winds 25 to
45 mph with gusts 55 to 65 mph possible.

WHERE: Portions of northwest and west central Washington.

WHEN: For the Wind Advisory, until 10 PM PST this evening. For
the High Wind Watch, from Tuesday evening through Wednesday
morning.

IMPACTS: Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles. Gusty winds could blow
around unsecured objects. Tree limbs could be blown down and a few
power outages may result.

ADDITIONAL DETAILS: Due to saturated grounds from previous heavy
rain, expect more widespread impacts with these winds.
+ Read More
Monitor the latest forecasts and warnings for updates. Use extra caution when driving, especially if operating a high profile vehicles. Secure outdoor objects. Secure outdoor objects.
Updated: Dec 15, 1:32 PM Source: NWS Alert
Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued December 15 at 9:28AM PST by NWS Seattle WA
Dec 15, 9:28 AM Dec 16, 3:00 AM
Rainfall from the past week has increased soil moisture to high
levels across western Washington. Additional rainfall of around 2-6
inches is expected early this week. This amount of rain will put
extra pressure on soil instability, leading to an increased threat of
landslides and debris flows, especially from recent burned areas.
This rain event could act as a trigger for new landslides.

Areas most susceptible to landslides debris flows under these
conditions are steep coastal bluffs, other steep hillsides or
road cuts, and recent burned areas. A diminishing threat of
landslides and debris flows will continue for several days after
the rain ends.

For more information about current conditions, visit
www.weather.gov/seattle, select Hydrology, and then scroll down
for the links to the landslide information pages.

For more information on landslides, visit the website for the
Washington State Department of Natural Resources landslide
geologic hazards at: http://bit.ly/2mtA3wn
Updated: Dec 15, 1:32 PM Source: NWS Alert