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The Great ShakeOut is Happening on October 15, 2026!

Current conditions at

Renton Municipal Airport (KRNT)

Lat: 47.49509°NLon: 122.21437°WElev: 23.0ft.

Mostly Cloudy

63°F

17°C

Humidity	39%
Wind Speed	SSE 4 MPH
Barometer	30.2 in (1022.69 mb)
Dewpoint	37°F (3°C)
Visibility	10.00 mi
Last update	13 Oct 02:05 PM PDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Newcastle WA

This Afternoon
High: 58 °F
Mostly Cloudy
Tonight
Low: 52 °F
Mostly Cloudy
Wednesday
High: 63 °F
Slight Chance
Rain then
Partly Sunny
Wednesday Night
Low: 48 °F
Mostly Clear
Thursday
High: 70 °F
Mostly Sunny
Thursday Night
Low: 52 °F
Mostly Clear
Friday
High: 73 °F
Mostly Sunny
Friday Night
Low: 54 °F
Chance Rain
Saturday
High: 58 °F
Chance Rain

Detailed Forecast

This Afternoon

Mostly cloudy, with a high near 58. Light south southwest wind.

Tonight

Mostly cloudy, with a low around 52. Calm wind becoming south 5 to 7 mph in the evening.

Wednesday

A 20 percent chance of rain before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 63. South wind around 5 mph becoming calm in the morning.

Wednesday Night

Mostly clear, with a low around 48. Light and variable wind.

Thursday

Mostly sunny, with a high near 70. Northeast wind around 5 mph becoming calm in the morning.

Thursday Night

Mostly clear, with a low around 52.

Friday

Mostly sunny, with a high near 73.

Friday Night

A chance of rain after 11pm. Mostly cloudy, with a low around 54.

Saturday

A chance of rain, mainly before 11am. Mostly cloudy, with a high near 58.