What is the 7-day weather forecast for Newcastle, WA?

The 7-day forecast for Newcastle shows highs from 43 to 58 degrees and lows from 36 to 45 degrees Fahrenheit. Expect precipitation on 8 days with chances of 20% or higher.

Will it rain in Newcastle, WA this week?

Yes, rain is possible in Newcastle this week. Precipitation chances: Monday (80% chance), Tuesday (100% chance), Wednesday (90% chance), Thursday (100% chance), Friday (50% chance), Saturday (50% chance), Sunday (50% chance), Monday (50% chance).

How accurate is the Newcastle weather forecast?

WeatherForYou provides highly accurate Newcastle forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Newcastle, WA Weather Forecast and Current Conditions

WEATHER ALERTS - Special Weather Statement - Flood Watch - Flood Warning - Wind Advisory

Current Conditions From Nearby Local Station

Switch to Metric Units

53°F
Feels Like 53°F

Humidity 99% Dew Point 53°F Wind NW 7 MPH Gusts 10 Barometer 29.04 in.

Solar Rad 12 w/m²

Report from a personal weather station 1.1 mi. E of central Newcastle
at 3:51 PM Mon, Dec 15, 2025

Point Forecast at a Glance

MonDec 15

60%

TueDec 16

100%

WedDec 17

90%

ThuDec 18

100%

FriDec 19

50%

SatDec 20

50%

SunDec 21

50%

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

Variable high temperatures through the week, ranging from 43°F to 58°F. Unsettled weather expected with rain on most days, including one day with snow.

Climate Context

This week's forecast shows temperatures running 3°F above the historical average for December. Normal highs for this period are around 45°F with lows around 34°F.

This Date in Weather History

1839 - The first of triple storms hit Massachusetts Bay. The storm produced whole gales, and more than 20 inches of snow in interior New England. There was great loss of life at Gloucester MA.

Newcastle, WA 7 Day Weather Forecast Details

Monday Dec 15

Day: A chance of showers and thunderstorms before 4pm, then rain likely and possibly a thunderstorm between 4pm and 5pm, then a chance of rain and thunderstorms after 5pm. Mostly cloudy, with a high near 58. Southwest wind around 20 mph, with gusts as high as 37 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Night: Rain. Low around 45. South southwest wind 11 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

Tuesday Dec 16

Day: Rain. High near 53. South southwest wind around 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Night: Rain. Low around 41. Southwest wind around 21 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

Wednesday Dec 17

Day: Rain. High near 45. Southwest wind 13 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

Night: Rain. Low around 41. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday Dec 18

Day: Rain. High near 48. Chance of precipitation is 100%.

Night: Rain. Cloudy, with a low around 38.

Friday Dec 19

Day: Rain. Mostly cloudy, with a high near 44.

Night: Rain. Mostly cloudy, with a low around 38.

Saturday Dec 20

Day: Rain. Mostly cloudy, with a high near 43.

Night: Rain likely, possibly mixed with snow. Mostly cloudy, with a low around 37.

Sunday Dec 21

Day: Rain likely, possibly mixed with snow. Mostly cloudy, with a high near 44.

Night: Rain likely, possibly mixed with snow. Mostly cloudy, with a low around 36.

Monday Dec 22

Day: Rain likely, possibly mixed with snow. Mostly cloudy, with a high near 44.

About Newcastle, WA

Newcastle is an Eastside city in King County, Washington, United States. The population was 13,017 at the 2020 census. Although Newcastle was not incorporated until 1994, it has been an important settlement and town since the late 19th century and played a major role in the development of Seattle and the surrounding region. Newcastle was one of the region's first coal mining areas and its railroad link to Seattle was the first in King County. Timber also played a role in the early history of Newcastle. Coal delivered by rail from Newcastle's mines to Seattle fueled the growth of the Port of Seattle and attracted railroads, most notably the Great Northern Railway. The Newcastle coal mine began producing coal by the 1870s. More than 13 million tons of coal had been extracted by the time the mine closed in 1963. The history of Newcastle's coal mining industry and the legacy of the mines' many Chinese laborers are memorialized in place names such as Coal Creek, Coal Creek Parkway, and the Coal Creek and China Creek golf courses. Based on per capita income, Newcastle ranks 13th of 522 areas in the state of Washington to be ranked. In CNN Money's 2011 rankings of best places to live in the United States, Newcastle was in the top 20, along with nearby Sammamish. It ranked 17th in Newsweek's 2009 rankings of best places to live in the United States.

Content from Wikipedia, licensed under CC BY-SA 3.0.

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Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

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