Ontario, Oregon Weather Conditions

Your Weather

To update your location please enter your ZIP code, city, state, airport code or country in the field below. Weather by E-mail: Forecast storm alerts. Weather E-Mail Alert Sign Up »

Current Conditions

  • 51°
  • Clear
  • Wind: West 7 mph
  • Humidity: 71%
  • Visibility: 10.0 miles
  • Dew Point: 42°
  • Pressure: 29.95 in. -

Select a Section

Click a section below for more information.

Next 12 Hours

9  pm
12  am
3  am
6  am
9  am
Partly Cloudy
Partly Cloudy
Clear
Clear
Fog
Fog
Fog
Fog
Mostly Cloudy
Mostly Cloudy
54°
52°
46°
43°
43°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Friday
  • Chance of Rain
  • High: 61 °
  • Low: 41 °
  • Chance of Rain
  • Saturday
  • Chance of Rain
  • High: 55 °
  • Low: 36 °
  • Chance of Rain
  • Sunday
  • Partly Cloudy
  • High: 54 °
  • Low: 28 °
  • Partly Cloudy
  • Monday
  • Partly Cloudy
  • High: 52 °
  • Low: 36 °
  • Partly Cloudy
  • Tuesday
  • Chance of Rain
  • High: 55 °
  • Low: 36 °
  • Chance of Rain

Forecast for Ontario, Oregon

Updated: 9:00 PM MDT on October 30, 2014

  • Thursday

    Mostly cloudy. High of 66F. Winds from the NNE at 5 to 10 mph shifting to the ESE in the afternoon.

  • Thursday Night

    Overcast in the evening, then partly cloudy. Fog overnight. Low of 43F. Winds less than 5 mph.

  • Friday

    Mostly cloudy in the morning, then overcast. Fog early. High of 61F. Winds less than 5 mph. Chance of rain 20%.

  • Friday Night

    Overcast with a chance of rain. Low of 41F. Winds from the NNE at 5 to 20 mph shifting to the WNW after midnight. Chance of rain 40%.

  • Saturday

    Overcast with rain showers. High of 55F. Breezy. Winds from the WNW at 10 to 25 mph with gusts to 30 mph. Chance of rain 80%.

  • Saturday Night

    Overcast with a chance of rain in the evening, then partly cloudy. Low of 36F. Breezy. Winds from the NW at 10 to 20 mph. Chance of rain 40%.

  • Sunday

    Partly cloudy in the morning, then clear. High of 54F. Winds from the WNW at 5 to 10 mph.

  • Sunday Night

    Partly cloudy. Fog overnight. Low of 28F. Winds less than 5 mph.

  • Monday

    Partly cloudy. High of 52F. Winds less than 5 mph.

  • Monday Night

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

  • Tuesday

    Mostly cloudy with a chance of rain. High of 55F. Winds from the SE at 5 to 10 mph. Chance of rain 40%.

  • Tuesday Night

    Partly cloudy. Low of 36F. Winds less than 5 mph.

  • Wednesday

    Partly cloudy. High of 63F. Winds less than 5 mph.

  • Wednesday Night

    Partly cloudy. Fog overnight. Low of 37F. Winds less than 5 mph.

  • Thursday

    Mostly cloudy. High of 66F. Winds less than 5 mph.

  • Thursday Night

    Partly cloudy. Fog overnight. Low of 39F. Winds less than 5 mph.

  • Friday

    Clear. High of 55F. Winds less than 5 mph.

  • Friday Night

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

  • Saturday

    Clear. High of 50F. Winds less than 5 mph.

  • Saturday Night

    Partly cloudy. Low of 36F. Winds less than 5 mph.

  • Sunday

    Partly cloudy. High of 50F. Winds less than 5 mph.

  • Sunday Night

    Clear. Low of 37F. Winds less than 5 mph.

  • Monday

    Clear. High of 50F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Iowa Ave and Highway 52, Payette, ID

Updated: 9:54 PM MDT

Temperature: 52.2 °F Dew Point: 43 °F Humidity: 71% Wind: Calm Pressure: 29.49 in Hourly Precipitation: - Windchill: - Graphs

Location: Payette Foothills, Payette, ID

Updated: 9:55 PM MDT

Temperature: 44.2 °F Dew Point: 13 °F Humidity: 28% Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

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

Updated: 9:55 PM MDT

Temperature: 45.3 °F Dew Point: 41 °F Humidity: 86% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Windchill: 45 °F Graphs

Location: Parma - Outdoor Range, Parma, ID

Updated: 9:56 PM MDT

Temperature: 51.6 °F Dew Point: 43 °F Humidity: 73% Wind: Calm Pressure: 27.28 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: MesoWest Rye Valley(I-84 MP 340.4) OR US ODOT, Huntington, OR

Updated: 8:30 PM PDT

Temperature: 56 °F Dew Point: 44 °F Humidity: 64% Wind: NW at 3 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Owyhee Junction, Nyssa, OR

Updated: 9:46 PM MDT

Temperature: 51.8 °F Dew Point: 43 °F Humidity: 71% Wind: NW at 6.0 mph Pressure: 29.86 in Hourly Precipitation: - Windchill: - Graphs

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

Updated: 8:45 PM MDT

Temperature: 51 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Mann Creek, Weiser, ID

Updated: 9:51 PM MDT

Temperature: 55.6 °F Dew Point: 44 °F Humidity: 65% Wind: WNW at 6.3 mph Pressure: 29.83 in Hourly Precipitation: - Windchill: - Graphs

Location: RAWS CATFISH ID US, Huntington, OR

Updated: 7:52 PM PDT

Temperature: 56 °F Dew Point: 37 °F Humidity: 49% Wind: SE at 5 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Boise Idaho 
839 PM MDT Thursday Oct 30 2014 


Discussion...deep trough off the northwest coast this evening with lots of 
cold cumulus west of 130w. Trough will come in Saturday and Sunday with 
much cooler temperatures and widespread rain and mountain snow showers. 
Latest model timing has the surface cold front along a McCall/Idaho 
southwestward to Rome/or line at sunset Friday...with all the precipitation behind 
the front. Precipitation will enter western Idaho after 12z Saturday morning and 
cover all Idaho zones later Saturday. Strong cold advection will 
lower maximum temperatures about 20f Saturday compared to Friday. Snow 
level will lower to about 4200 feet mean sea level late Saturday night and 
Sunday morning...or lower than in previous forecast and low enough 
for snow to accumulate at pass levels. Significant west-east surface 
pressure gradient will develop gusty west winds in the snake basin 
Saturday and may require a Wind Advisory for the western Magic Valley... 
but so far guidance does not support winds that strong. Current 
forecast has a slight chance of thunderstorms in eastern-most Idaho zones 
Saturday but none of the models has negative lifted index. Still... 
given the speed of the front and thermal gradient across it...there 
should be pronounced lift at frontal passage and slight chance of thunderstorms 
looks like a good call. 


&& 


Aviation...VFR expected through the period with scattered-broken middle-high 
level clouds. Surface winds generally southeast around 10kts...with 
occasional gusts to around 20 kts in Magic Valley. Winds aloft at 
around 10k feet mean sea level...southwest at 25-35kts. 


&& 


Previous discussion... 
short term...tonight through Saturday...an upper level trough 
will shift close to the coast Friday and bring an upper low across 
the intermountain west Saturday. Tonight and Friday this will 
result in mild temperatures...areas of breezy southeast to SW winds and 
mostly cloudy conditions...along with showers over Oregon late 
Friday night and over southwest Idaho Saturday. Cooling of 2 to 5 
degrees mainly across Oregon Friday will be followed by 10-20 
degrees further cooling Saturday as the upper trough moves across 
the area. Low Li and a cold front will move across NE Oregon late 
Friday and low Li will continue across S central Idaho late Saturday 
for a threat of thunderstorms each day. Strong gusty winds are 
expected late Saturday from Ontario through Twin Falls. 


Long term...Saturday night through Tuesday...cool upper level 
trough will move through the region and snow levels will fall to 
around 5000 feet briefly as the precipitation comes to an end. Drier 
air will move into the region by Sunday ahead of weak ridging. 
Temperatures will gradually warm by Monday as the flow turns more 
zonal. 


Tuesday night through Thursday...a moist westerly flow will bring a 
chance of precipitation to the blue/W-central/Boise Mountains. This may 
come in the form of snow above 6000 feet on Tuesday night through 
early Wednesday morning. In the meantime...a ridge will build in 
from the south keeping the remainder of the County Warning Area dry and a hair 
warmer than our northern portions. Temperatures will be about 5 
degrees above normal. 


&& 


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


&& 


$$ 


Weather.Gov/Boise 


Discussion...lc 
aviation.....Ep 
previous short term...vm 
previous long term....ka/ab 






National Weather Service Glossary of Abbreviations

Non-Expanded Version (with abbreviations)

Powered by the Weather Underground, Inc.