What is today's weather forecast for Saint John, WA?

Today's forecast for Saint John shows a high of 57 degrees and a low of 40 degrees Fahrenheit. A 40 percent chance of rain.

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

The 7-day forecast for Saint John shows highs from 41 to 57 degrees and lows from 30 to 40 degrees Fahrenheit. Expect precipitation on 8 days with chances of 20% or higher.

Will it rain in Saint John, WA this week?

Yes, rain is possible in Saint John this week. Precipitation chances: Monday (40% chance), Tuesday (100% chance), Wednesday (60% chance), Thursday (90% chance), Friday (60% chance), Saturday (40% chance), Sunday (50% chance), Monday (60% chance).

How accurate is the Saint John weather forecast?

WeatherForYou provides highly accurate Saint John 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.

Saint John, WA Weather Forecast and Current Conditions

WEATHER ALERTS - Wind Advisory - High Wind Watch

Current Conditions

Switch to Metric Units

49°F
Feels Like 49°F

Humidity 84% Dew Point 44°F Wind SSE 3 MPH Gusts 12 Barometer 29.9 in.

Report from a MADIS/MESONET weather station 16.5 mi. ESE of central Saint John
at 4:31 PM Mon, Dec 15, 2025

Point Forecast at a Glance

MonDec 15

40%

TueDec 16

50%

WedDec 17

60%

ThuDec 18

90%

FriDec 19

60%

SatDec 20

40%

SunDec 21

40%

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

Cooling trend continues with high temperatures dropping from 57°F to 41°F. Unsettled weather expected with wintry mix likely on at least 7 days.

Climate Context

This week's forecast shows temperatures running 11°F above the historical average for December. Normal highs for this period are around 36°F with lows around 25°F.

This Date in Weather History

1987 - A major winter storm hit the Great Lakes Region, intensifying explosively as it crossed northern Illinois. High winds and heavy snow created blizzard conditions in southeastern Wisconsin. Winds gusted to 73 mph, and snowfall totals ranged up to 17 inches at LaFarge. The barometric pressure at Chicago IL dropped three quarters of an inch in six hours to 28.96 inches, a record low reading for December. Up to a foot of snow blanketed northern Illinois, and winds in the Chicago area gusted to 75 mph. O'Hare Airport in Chicago was closed for several hours, for only the fourth time in twenty years. High winds derailed train cars at Avon IN. Light winds and partly sunny skies were reported near the center of the storm, a feature typical of tropical storms.

Saint John, WA 7 Day Weather Forecast Details

Monday Dec 15

Day: A 40 percent chance of rain. Partly sunny, with a high near 57. Breezy, with a south wind 21 to 23 mph, with gusts as high as 37 mph.

Night: A 30 percent chance of rain before 7pm. Increasing clouds, with a low around 40. Windy, with a southwest wind 20 to 25 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 40 mph.

Tuesday Dec 16

Day: A 50 percent chance of rain, mainly after 4pm. Mostly cloudy, with a high near 53. Breezy, with a south wind 14 to 18 mph, with gusts as high as 31 mph. New precipitation amounts of less than a tenth of an inch possible.

Night: Rain, mainly after 10pm. Low around 38. Windy, with a southwest wind 21 to 26 mph increasing to 27 to 32 mph after midnight. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday Dec 17

Day: Rain and snow likely before 1pm, then a chance of rain between 1pm and 4pm. Partly sunny, with a high near 48. Windy, with a southwest wind 25 to 33 mph, with gusts as high as 55 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

Night: Rain and snow likely, mainly after 4am. Mostly cloudy, with a low around 34. Chance of precipitation is 60%. Little or no snow accumulation expected.

Thursday Dec 18

Day: Rain, possibly mixed with snow, becoming all rain after 1pm. High near 47. Chance of precipitation is 90%. Little or no snow accumulation expected.

Night: Rain before 4am, then rain likely, possibly mixed with snow. Low around 37. Chance of precipitation is 90%.

Friday Dec 19

Day: Snow likely, possibly mixed with rain. Mostly cloudy, with a high near 44. Chance of precipitation is 60%.

Night: A chance of rain and snow before 10pm, then a chance of snow. Mostly cloudy, with a low around 31. Chance of precipitation is 40%.

Saturday Dec 20

Day: A chance of rain and snow. Partly sunny, with a high near 42. Chance of precipitation is 40%.

Night: A chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 40%.

Sunday Dec 21

Day: A chance of rain and snow. Partly sunny, with a high near 41. Chance of precipitation is 40%.

Night: A chance of rain and snow. Mostly cloudy, with a low around 31. Chance of precipitation is 50%.

Monday Dec 22

Day: Rain and snow likely. Mostly cloudy, with a high near 43. Chance of precipitation is 60%.

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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