Swift Reservoir, WA Weather Forecast and Current Conditions

Current Conditions From Nearby Station

51°F
Feels Like 51°F  
Humidity 48% Dew Point 32°F Wind SSE 5 MPH Gusts 12 Barometer N/A
Report from a MADIS/MESONET weather station 9.7 mi. SSW of central Swift Reservoir
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Point Forecast at a Glance

SunDec 14
Sun Dec 14: Rain, Low 45F
90%
 
45
MonDec 15
Mon Dec 15: Thunderstorms, High 52F, Low 44F
100%
52
44
TueDec 16
Tue Dec 16: Rain, High 48F, Low 36F
100%
48
36
WedDec 17
Wed Dec 17: Showers, High 39F, Low 37F
100%
39
37
ThuDec 18
Thu Dec 18: Rain, High 43F, Low 37F
50%
43
37
FriDec 19
Fri Dec 19: Rain, High 39F, Low 34F
50%
39
34
SatDec 20
Sat Dec 20: Snow, High 38F, Low 34F
50%
38
34

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7-Day Temperature Trend

Week Ahead Summary

Cooling trend continues with high temperatures dropping from 52°F to 38°F. Unsettled weather expected with rain or snow likely on at least 7 days.

Climate Context

This week's forecast shows temperatures running 1°F below the historical average for December. Normal highs for this period are around 44°F with lows around 33°F.

This Date in Weather History

1924 - The temperature at Helena, MT, plunged 79 degrees in 24 hours, and 88 degrees in 34 hours. The mercury plummeted from 63 above to 25 below zero. At Fairfield MT the temperature plunged 84 degrees in just 12 hours, from 63 at Noon to 21 below zero at midnight.

More on this and other weather history

Swift Reservoir, WA 7 Day Weather Forecast Details

Sunday Dec 14

Rain

Night: Rain, mainly after 11pm. The rain could be heavy at times. Low around 45. East northeast wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

Monday Dec 15

Thunderstorms

Day: Rain and possibly a thunderstorm before 7am, then showers and possibly a thunderstorm, mainly after 7am. Some of the storms could produce heavy rainfall. High near 52. Southwest wind 7 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Showers

Night: Showers. Low around 44. Southwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Tuesday Dec 16

Rain

Day: Rain. High near 48. Southwest wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

Rain

Night: Rain. Low around 36. Breezy, with a south southwest wind 16 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

Wednesday Dec 17

Showers

Day: Showers. Snow level 2600 feet. High near 39. Chance of precipitation is 100%.

Showers

Night: Showers before 10pm, then rain after 10pm. Snow level 3100 feet. Low around 37. Chance of precipitation is 90%.

Thursday Dec 18

Rain

Day: Rain. Cloudy, with a high near 43.

Rain

Night: Rain. Cloudy, with a low around 37.

Friday Dec 19

Rain

Day: Rain. Snow level 2800 feet. Cloudy, with a high near 39.

Rain And Snow

Night: Rain and snow. Snow level 2100 feet. Cloudy, with a low around 34.

Saturday Dec 20

Snow

Day: Rain, possibly mixed with snow. Snow level 2400 feet. Cloudy, with a high near 38.

Rain

Night: Rain. Snow level 2600 feet. Cloudy, with a low around 34.

Sunday Dec 21

Rain

Day: Rain. Snow level 2500 feet rising to 3100 feet in the afternoon. Cloudy, 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.