Ontario, Oregon Weather Conditions

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Current Conditions

  • 36°
  • Overcast
  • Wind: West 6 mph
  • Humidity: 93%
  • Visibility: 6.0 miles
  • Dew Point: 34°
  • Pressure: 30.14 in. 0
  • Heat Index: 31

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Next 12 Hours

11  pm
2  am
5  am
8  am
11  am
Chance of Rain
Chance of Rain
Chance of Rain
Chance of Rain
Rain
Rain
Rain
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37°
36°
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39°
37°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Friday
  • Rain
  • High: 44 °
  • Low: 32 °
  • Rain
  • Saturday
  • Chance of Snow
  • High: 45 °
  • Low: 34 °
  • Chance of Snow
  • Sunday
  • Rain
  • High: 52 °
  • Low: 45 °
  • Rain
  • Monday
  • Partly Cloudy
  • High: 54 °
  • Low: 36 °
  • Partly Cloudy
  • Tuesday
  • Partly Cloudy
  • High: 46 °
  • Low: 36 °
  • Partly Cloudy

Forecast for Ontario, Oregon

Updated: 8:00 PM MST on December 18, 2014

  • Friday

    Overcast with rain. High of 43F. Winds from the SSE at 5 to 10 mph. Chance of rain 90%.

  • Friday Night

    Mostly cloudy with a chance of snow and rain showers, then a chance of snow and a chance of rain after midnight. Low of 32F. Winds less than 5 mph. Chance of snow 70%.

  • Saturday

    Overcast with a chance of snow and rain, then rain in the afternoon. High of 45F. Winds from the SE at 5 to 10 mph. Chance of precipitation 80% .

  • Saturday Night

    Mostly cloudy with rain in the evening, then overcast with snow and rain. Low of 34F. Winds from the SSE at 5 to 10 mph. Chance of precipitation 60% .

  • Sunday

    Overcast with rain. High of 52F. Winds from the SW at 5 to 10 mph. Chance of rain 60%.

  • Sunday Night

    Overcast with a chance of rain. Low of 45F. Winds from the SW at 10 to 15 mph. Chance of rain 20%.

  • Monday

    Overcast. High of 54F. Winds from the WNW at 5 to 10 mph.

  • Monday Night

    Mostly cloudy in the evening, then overcast. Low of 36F. Winds less than 5 mph.

  • Tuesday

    Overcast in the morning, then mostly cloudy. Fog early. High of 46F. Winds less than 5 mph.

  • Tuesday Night

    Mostly cloudy. Fog overnight. Low of 36F. Winds less than 5 mph.

  • Wednesday

    Mostly cloudy with a chance of rain. High of 43F. Winds from the NW at 5 to 10 mph. Chance of rain 40%.

  • Wednesday Night

    Mostly cloudy. Low of 30F with a windchill as low as 23F. Winds from the NW at 10 to 15 mph.

  • Thursday

    Partly cloudy. High of 34F. Winds less than 5 mph.

  • Thursday Night

    Mostly cloudy. Low of 27F. Winds less than 5 mph.

  • Friday

    Clear. High of 32F. Winds less than 5 mph.

  • Friday Night

    Clear. Low of 23F. Winds less than 5 mph.

  • Saturday

    Clear. High of 30F. Winds less than 5 mph.

  • Saturday Night

    Clear. Low of 21F. Winds less than 5 mph.

  • Sunday

    Partly cloudy with a chance of snow. High of 28F. Winds less than 5 mph. Chance of snow 20%.

  • Sunday Night

    Partly cloudy with a chance of snow. Fog overnight. Low of 23F. Winds less than 5 mph. Chance of snow 40%.

  • Monday

    Clear. Fog early. High of 27F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Iowa Ave and Highway 52, Payette, ID

Updated: 12:02 AM MST

Temperature: 38.3 °F Dew Point: 35 °F Humidity: 88% Wind: Calm Pressure: 29.67 in Hourly Precipitation: - Windchill: 38 °F Graphs

Location: Payette Foothills, Payette, ID

Updated: 12:09 AM MST

Temperature: 37.0 °F Dew Point: 14 °F Humidity: 38% Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: NE 25th/Payette Heights Rd., Payette, ID

Updated: 12:09 AM MST

Temperature: 36.3 °F Dew Point: 35 °F Humidity: 95% Wind: Calm Pressure: 30.22 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Annex, Ontario, OR

Updated: 12:05 AM MST

Temperature: 37.7 °F Dew Point: 37 °F Humidity: 96% Wind: Calm Pressure: 30.17 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: MesoWest COBB ID US UPR, Weiser, ID

Updated: 11:00 PM MST

Temperature: 39 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 39 °F Graphs

Location: HADS BULLY CREEK RESERVOIR NEAR VALE OR US USBR, Vale, OR

Updated: 10:45 PM MST

Temperature: 37 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: Mann Creek, Weiser, ID

Updated: 11:55 PM MST

Temperature: 38.8 °F Dew Point: 37 °F Humidity: 92% Wind: WNW at 2.2 mph Pressure: 30.02 in Hourly Precipitation: - Windchill: 39 °F Graphs

Location: RAWS CATFISH ID US, Huntington, OR

Updated: 9:52 PM PST

Temperature: 38 °F Dew Point: 36 °F Humidity: 94% Wind: SE at 14 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Boise Idaho 
851 PM MST Thursday Dec 18 2014 


Discussion... 
abundant moisture off the coast in association with the next cold 
front is expected to push into eastern Oregon overnight and into 
western Idaho middle morning through early afternoon. The associated 
warm front moved into eastern Oregon early this evening and is now 
moving into central Idaho. This will keep snow off and on in 
McCall this evening. This sould be a good event for the mountain 
regions with generally 3 to 6 inches of snow expected through the 
end of the day Friday. This all handled well in the current 
forecast. Have made a few changes to the forecast to increase 
overnight temperatures slightly across the forecast area along 
with increasing the winds. 


&& 


Aviation...scattered MVFR snow showers will continue over the 
higher terrain of southeast Oregon and the central Idaho mountains. Areas 
of snow with rain below 4k feet mean sea level will spread across eastern Oregon 
into the central Idaho mountains after 06z and all of southwest 
Idaho after 12z with warm frontal passage. MVFR/IFR conditions with 
snow...MVFR/low-VFR conditions in rain. Surface winds...south- 
southeast around 10 kts. Winds aloft... southwest 15-25 kts up 
through 10k feet mean sea level. 


Weekend outlook...brief break in the precipitation Friday night will 
be followed by widespread precipitation starting in eastern Oregon 
late Saturday morning and spreading across the entire area by 
Saturday evening lasting through Sunday afternoon. Snow levels 4000- 
4500 feet mean sea level Saturday morning will rise to 6000-8000 feet by Saturday 
afternoon/evening. Valleys will remain as all rain but will likely 
see MVFR ceilings Saturday night through Sunday morning. 


&& 


Previous discussion... 
short term...tonight through Saturday...short wave ridge will 
move through overnight...and in it/S wake we will begin the first 
of two notable changes in the weather pattern impacting the 
Pacific northwest. Strong moist flow will move in behind the short wave 
ridge. This will begin a period of moderate to heavy precipitation that 
will last into the long term. The first wave will move in Friday. 
We have continued the trend of increasing probability of precipitation as confidence 
increases. Precipitation will spread from west to east tonight...getting 
into all of SW Idaho by tomorrow afternoon. Rainfall amounts will 
range from 0.10 to 0.20 in lower elevations...with even more at 
higher elevations. Temperatures will be still be above normal...but 
several degrees cooler than today. Friday night we will see a 
relative break in the action. On Sat...an even wetter system will 
begin moving into the region. Light to moderate rainfall will 
move into eastern Oregon early in the day...and into SW Idaho mainly 
in the afternoon. Conditions in Boise from middle afternoon into the 
early evening will be cool and rainy...with temperatures in the lower 
40s. Heavier precipitation will come Saturday night. 


Long term...Saturday night through Tuesday...a moist flow from 
the Pacific will keep our area mild wet and cloudy through Monday. 
Snow levels will range from 4000 to 5000 feet Saturday evening 
then rise to around 6500 feet in central Idaho and as high as 8000 
feet in southeast Oregon by Sunday afternoon. Rainfall totals of 
half an inch or more are expected in the valleys...falling mainly 
Saturday night through Sunday evening. New snow accumulations of 
12 to 18 inches are likely above 6500 feet by Monday night in the 
mountains of central Idaho and Baker County Oregon. Monday night 
and Tuesday an upper level ridge building north and east from 
California will bring a drying trend with scattered showers 
confined mainly over the mountains. Temperatures will average 
around 15 degrees above normal. 


Tuesday night through Thursday...the region will begin this 
period in a moist northwesterly flow...but will come under the 
influence of a moist/cold shortwave by Wednesday evening. This 
shortwave will bring a chance of precipitation to the entire 
region and will continue doing so until Christmas morning. Areas 
in southeast Oregon and the Treasure valley will be the first to 
dry out while higher elevations and the Magic Valley will continue 
to experience a slight chance of precipitation through Christmas 
night. Precipitation could come in the form of snow /including the 
valleys as temperatures and snow levels drop/ by Wednesday night. 
Temperatures during this period will begin about 5 degrees above 
normal but will drop to normal by Thursday. 


&& 


Boi watches/warnings/advisories... 
Idaho...none. 
Or...none. 


&& 


$$ 


Weather.Gov/Boise 


Discussion...CR 
aviation.....Js 
previous short term...snow pellets 
previous long term....jt/ab 






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