What is today's weather forecast for Sumach, WA?

Today's forecast for Sumach shows a high of 57 degrees and a low of 35 degrees Fahrenheit. A 20 percent chance of rain.

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

The 7-day forecast for Sumach shows highs from 39 to 57 degrees and lows from 25 to 36 degrees Fahrenheit. Expect precipitation on 8 days with chances of 20% or higher.

Will it rain in Sumach, WA this week?

Yes, rain is possible in Sumach this week. Precipitation chances: Monday (30% chance), Tuesday (100% chance), Wednesday (80% chance), Thursday (100% chance), Friday (50% chance), Saturday (50% chance), Sunday (50% chance), Monday (50% chance).

How accurate is the Sumach weather forecast?

WeatherForYou provides highly accurate Sumach 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.

Sumach, WA Weather Forecast and Current Conditions

WEATHER ALERTS - High Wind Watch - Wind Advisory

Current Conditions From Nearby Local Station

Switch to Metric Units

60°F
Feels Like 60°F

Humidity 61% Dew Point 47°F Wind W 5 MPH Gusts 11 Barometer 29.84 in.

Report from a MADIS/MESONET weather station 2.9 mi. NE of central Sumach
at 4:40 PM Mon, Dec 15, 2025

Point Forecast at a Glance

MonDec 15

20%

TueDec 16

60%

WedDec 17

40%

ThuDec 18

100%

FriDec 19

40%

SatDec 20

50%

SunDec 21

50%

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

Cooling trend continues with high temperatures dropping from 57°F to 39°F. Unsettled weather expected with wintry mix likely on at least 7 days.

Climate Context

This week's forecast shows temperatures running 10°F above the historical average for December. Normal highs for this period are around 37°F with lows around 23°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.

Sumach, WA 7 Day Weather Forecast Details

Monday Dec 15

Day: A 20 percent chance of rain. Sunny, with a steady temperature around 57. Southwest wind around 20 mph, with gusts as high as 43 mph.

Night: A slight chance of rain before 7pm, then a chance of rain after 1am. Partly cloudy, with a low around 35. Southwest wind 6 to 15 mph, with gusts as high as 33 mph. Chance of precipitation is 30%.

Tuesday Dec 16

Day: Rain likely, mainly between 7am and 10am. Partly sunny, with a high near 56. East wind 6 to 11 mph becoming west in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Night: Rain, mainly before 4am. Low around 36. West wind 14 to 16 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday Dec 17

Day: A 40 percent chance of rain, mainly before 10am. Snow level 2400 feet. Mostly sunny, with a high near 48. West wind 15 to 18 mph, with gusts as high as 31 mph.

Night: Rain, mainly after 4am. Low around 32. Chance of precipitation is 80%.

Thursday Dec 18

Day: Rain. High near 42. Chance of precipitation is 100%.

Night: Rain before 4am, then a chance of rain and snow. Low around 30. Chance of precipitation is 80%.

Friday Dec 19

Day: A chance of rain and snow before 1pm, then a slight chance of rain. Mostly sunny, with a high near 44. Chance of precipitation is 40%.

Night: A slight chance of rain before 7pm, then a slight chance of rain and snow. Snow level 1500 feet. Partly cloudy, with a low around 26.

Saturday Dec 20

Day: A chance of rain and snow. Snow level 1400 feet rising to 2200 feet in the afternoon. Mostly sunny, with a high near 42.

Night: A chance of rain and snow. Snow level 1800 feet. Partly cloudy, with a low around 25.

Sunday Dec 21

Day: A chance of rain and snow. Snow level 1700 feet rising to 2400 feet in the afternoon. Partly sunny, with a high near 39.

Night: A chance of rain and snow. Mostly cloudy, with a low around 25.

Monday Dec 22

Day: A chance of rain and snow. Partly sunny, with a high near 40.

How We Provide Better Local Weather

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.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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