Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.
Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >
Current conditions at
Renton Municipal Airport (KRNT)
Lat: 47.49509°NLon: 122.21437°WElev: 23.0ft.
Mostly Cloudy
58°F
14°C
| Humidity | 69% |
| Wind Speed | NNW 8 MPH |
| Barometer | 30.24 in (1024.04 mb) |
| Dewpoint | 48°F (9°C) |
| Visibility | 10.00 mi |
| Last update | 18 May 10:53 PM PDT |
Extended Forecast for
Newcastle WA
Tonight
Low: 48 °F
Mostly Cloudy
Tuesday
High: 64 °F
Mostly Cloudy
Tuesday Night
Low: 50 °F
Mostly Cloudy
Wednesday
High: 67 °F
Mostly Sunny
Wednesday Night
Low: 49 °F
Partly Cloudy
Thursday
High: 74 °F
Mostly Sunny
Thursday Night
Low: 52 °F
Partly Cloudy
Friday
High: 73 °F
Mostly Sunny
Friday Night
Low: 53 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly cloudy, with a low around 48. Northeast wind around 5 mph becoming light and variable after midnight.
Tuesday
Mostly cloudy, with a high near 64. South wind around 5 mph becoming light and variable in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 50. Northeast wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 67. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 49. North northwest wind 5 to 7 mph becoming light and variable in the evening.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 52.
Friday
Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 53.
Saturday
Partly sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Partly sunny, with a high near 65.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 49.
Memorial Day
A chance of rain. Partly sunny, with a high near 62.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Newcastle WA
47.53°N 122.14°W (Elev. 873 ft)
47.53°N 122.14°W (Elev. 873 ft)
11:27 am PDT May 18, 2026
11pm PDT May 18, 2026-6pm PDT May 25, 2026
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