Hermiston, Oregon Weather Conditions

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Current Conditions

  • 76°
  • Clear
  • Wind: WSW 8 mph
  • Humidity: 37%
  • Visibility: 10.0 miles
  • Dew Point: 48°
  • Pressure: 29.70 in. 0

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Next 12 Hours

8  pm
11  pm
2  am
5  am
8  am
Partly Cloudy
Partly Cloudy
Overcast
Overcast
Mostly Cloudy
Mostly Cloudy
Overcast
Overcast
Overcast
Overcast
72°
66°
62°
60°
61°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Partly Cloudy
  • High: 77 °
  • Low: 48 °
  • Partly Cloudy
  • Thursday
  • Clear
  • High: 73 °
  • Low: 45 °
  • Clear
  • Friday
  • Clear
  • High: 76 °
  • Low: 47 °
  • Clear
  • Saturday
  • Chance of Rain
  • High: 73 °
  • Low: 48 °
  • Chance of Rain
  • Sunday
  • Clear
  • High: 81 °
  • Low: 48 °
  • Clear

Forecast for Hermiston, Oregon

Updated: 2:55 PM PDT on September 1, 2015

  • Tonight

    Mostly clear in the evening then becoming mostly cloudy. Lows 56 to 61. West wind 10 to 15 mph.

  • Wednesday

    Mostly cloudy. A 20 percent chance of showers in the morning. Highs 72 to 77. West wind 15 to 20 mph.

  • Wednesday Night

    Partly cloudy. Lows 47 to 52. Southwest wind 15 to 20 mph.

  • Thursday

    Partly cloudy. Highs 70 to 75. West wind 10 to 15 mph.

  • Thursday Night

    Partly cloudy. Lows 45 to 50. West wind 10 to 15 mph shifting to the southwest around 5 mph overnight.

  • Friday

    Partly cloudy. Highs 70 to 75.

  • Friday Night

    Partly cloudy. A chance of showers and a slight chance of thunderstorms. Lows 47 to 52.

  • Saturday and Saturday Night

    Partly cloudy. Highs 73 to 78. Lows 46 to 51.

  • Sunday through Labor Day

    Mostly clear. Highs 78 to 85. Lows 46 to 51.

  • Monday Night and Tuesday

    Partly cloudy. Lows 48 to 54. Highs 81 to 86.

Severe Weather Alert Descriptions

 Special Statement  Statement as of 12:16 PM PDT on September 1, 2015


... Unseasonably cool temperatures rest of the week...

An early autumn like weather system will be settling over the
region midweek and continue into the Labor Day weekend. This will
lead to unusually cool conditions through this period with high
temperatures in the Columbia Basin in the 60s to lower 70s while
the mountains will see 50s and 60s. Overnight low temperatures
will also be cool with 40s in the basin and upper 20s and 30s in
the mountains.

The initial cold front will move through the region on Wednesday
bringing a chance of precipitation. Unstable conditions will lead
to some more showers on Thursday. Perhaps the best chance for a
more widespread rain would come late Friday and into Saturday as
The Heart of the cold air moves over the forecast area. Snow
levels during this time will lower to around 6500 feet. This means
there could be a dusting of snow in the higher elevations of the
Wallowa, Elkhorn, Strawberry and Cascade mountains.

Those planning outdoor adventures should be prepared for the
cooler conditions and potential precipitation.



1216 PM PDT Tue Sep 1 2015

... Unseasonably cool temperatures rest of the week...

An early autumn like weather system will be settling over the
region midweek and continue into the Labor Day weekend. This will
lead to unusually cool conditions through this period with high
temperatures in the Columbia Basin in the 60s to lower 70s while
the mountains will see 50s and 60s. Overnight low temperatures
will also be cool with 40s in the basin and upper 20s and 30s in
the mountains.

The initial cold front will move through the region on Wednesday
bringing a chance of precipitation. Unstable conditions will lead
to some more showers on Thursday. Perhaps the best chance for a
more widespread rain would come late Friday and into Saturday as
The Heart of the cold air moves over the forecast area. Snow
levels during this time will lower to around 6500 feet. This means
there could be a dusting of snow in the higher elevations of the
Wallowa, Elkhorn, Strawberry and Cascade mountains.

Those planning outdoor adventures should be prepared for the
cooler conditions and potential precipitation.




1216 PM PDT Tue Sep 1 2015

... Unseasonably cool temperatures rest of the week...

An early autumn like weather system will be settling over the
region midweek and continue into the Labor Day weekend. This will
lead to unusually cool conditions through this period with high
temperatures in the Columbia Basin in the 60s to lower 70s while
the mountains will see 50s and 60s. Overnight low temperatures
will also be cool with 40s in the basin and upper 20s and 30s in
the mountains.

The initial cold front will move through the region on Wednesday
bringing a chance of precipitation. Unstable conditions will lead
to some more showers on Thursday. Perhaps the best chance for a
more widespread rain would come late Friday and into Saturday as
The Heart of the cold air moves over the forecast area. Snow
levels during this time will lower to around 6500 feet. This means
there could be a dusting of snow in the higher elevations of the
Wallowa, Elkhorn, Strawberry and Cascade mountains.

Those planning outdoor adventures should be prepared for the
cooler conditions and potential precipitation.





Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Southeast 11th Street, Hermiston, OR

Updated: 7:20 PM PDT

Temperature: 76.6 °F Dew Point: 52 °F Humidity: 41% Wind: North at - Pressure: 29.74 in Hourly Precipitation: - Heat Index: 78 °F Graphs

Location: West Park Area, JW's Backyard, Hermiston, OR

Updated: 7:20 PM PDT

Temperature: 74.1 °F Dew Point: 43 °F Humidity: 33% Wind: Calm Pressure: 29.71 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: APRSWXNET, Hermiston, OR

Updated: 6:31 PM PDT

Temperature: 78 °F Dew Point: 46 °F Humidity: 32% Wind: WSW at 3 mph Pressure: 29.70 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: South Hill, Umatilla, OR

Updated: 7:21 PM PDT

Temperature: 75.9 °F Dew Point: 48 °F Humidity: 38% Wind: SSW at 7.0 mph Pressure: 29.62 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: APRSWXNET, Echo, OR

Updated: 6:54 PM PDT

Temperature: 75 °F Dew Point: 46 °F Humidity: 36% Wind: West at 9 mph Pressure: 29.73 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Irrigon Light, Plymouth, WA

Updated: 7:20 PM PDT

Temperature: 75.0 °F Dew Point: - Humidity: - Wind: North at - Pressure: 29.34 in Hourly Precipitation: - Heat Index: - Graphs

Location: APRSWXNET, Helix, OR

Updated: 6:59 PM PDT

Temperature: 74 °F Dew Point: 48 °F Humidity: 40% Wind: West at 2 mph Pressure: 29.67 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: East Paterson, Paterson, WA

Updated: 7:13 PM PDT

Temperature: 74.5 °F Dew Point: 50 °F Humidity: 43% Wind: SW at 5.8 mph Pressure: 29.27 in Hourly Precipitation: - Heat Index: 77 °F Graphs

Location: APRSWXNET, Plymouth, WA

Updated: 6:12 PM PDT

Temperature: 78 °F Dew Point: 50 °F Humidity: 37% Wind: West at 6 mph Pressure: 29.67 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: MesoWest, Plymouth, WA

Updated: 6:35 PM PDT

Temperature: 77 °F Dew Point: 47 °F Humidity: 35% Wind: WSW at 8 mph Pressure: 29.71 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: Pendleton-Stage Gulch Road, Pendleton, OR

Updated: 7:08 PM PDT

Temperature: 74.2 °F Dew Point: 51 °F Humidity: 45% Wind: West at 10.0 mph Pressure: 32.07 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: APRSWXNET, Helix, OR

Updated: 6:52 PM PDT

Temperature: 75 °F Dew Point: 46 °F Humidity: 36% Wind: West at 3 mph Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Riverside High School, Boardman, OR

Updated: 7:21 PM PDT

Temperature: 75.2 °F Dew Point: 48 °F Humidity: 39% Wind: SSW at 7.0 mph Pressure: 29.72 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: Port Kelley, Touchet, WA

Updated: 7:20 PM PDT

Temperature: 77.8 °F Dew Point: - Humidity: - Wind: North at - Pressure: 29.32 in Hourly Precipitation: - Heat Index: - Graphs

Location: Valley Vista, Kennewick, WA

Updated: 7:20 PM PDT

Temperature: 75.6 °F Dew Point: 46 °F Humidity: 35% Wind: West at 6.5 mph Pressure: 29.26 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Willow Run Golf Course, Boardman, OR

Updated: 7:21 PM PDT

Temperature: 72.5 °F Dew Point: 47 °F Humidity: 40% Wind: SW at 3.1 mph Pressure: 29.71 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: APRSWXNET, Kennewick, WA

Updated: 6:46 PM PDT

Temperature: 77 °F Dew Point: 50 °F Humidity: 39% Wind: Calm Pressure: 29.67 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: South Kennewick, Kennewick, WA

Updated: 7:20 PM PDT

Temperature: 77.4 °F Dew Point: 50 °F Humidity: 39% Wind: West at 1.0 mph Pressure: 29.66 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: National Weather Service, Pendleton, OR

Updated: 7:21 PM PDT

Temperature: 73.0 °F Dew Point: 45 °F Humidity: 37% Wind: WNW at 10.3 mph Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: APRSWXNET, Helix, OR

Updated: 6:27 PM PDT

Temperature: 73 °F Dew Point: 44 °F Humidity: 35% Wind: NE at 6 mph Pressure: 29.52 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Middle Cold Springs Creek-Helix 6SW, Pendleton, OR

Updated: 5:40 PM PDT

Temperature: 75.1 °F Dew Point: 46 °F Humidity: 36% Wind: West at 7.0 mph Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion...updated 
National Weather Service Pendleton or 
325 PM PDT Tuesday Sep 1 2015 


Updated aviation discussion 


Short term...tonight through Friday...the broad upper level trough 
over the area will be transitioning to a deep trough centered over 
the Pacific northwest by Friday. This transition will begin late 
tonight and Wednesday as shortwave energy drops down the Canadian 
coast towards Vancouver Island. This will advance a cold front into 
the forecast area early Wednesday then slowly move eastward through 
the day and overnight. There will be some precipitation associated 
with the front and a tenth to two tenths could be possible mainly 
over the eastern mountains and along the Cascades. Very little 
precipitation is expected in the Columbia Basin but the foothills of 
the Blue Mountains east of Hermiston and Pasco could see a few 
hundreths. Temperatures will begin to cool on Wednesday as the cold 
front passes through the area. This will be the beginning of some 
unseasonably cool weather through the rest of the week. The trough 
will deepen further on Thursday with most of the energy remaining 
west of the Cascades. This energy will begin to shift into eastern 
Oregon and Washington on Friday along with the coolest air. The 
potential is there for this to become a major rain producer late 
Friday especially over the eastern portion of the forecast area. 
Have begun to increase the chance of precipitation for this time 
period. 




Long term...Friday night through Tuesday...an upper level low will 
move east from central Oregon Friday afternoon to Idaho Saturday. 
Showers and thunderstorms will decrease overnight Friday. The European model (ecmwf) 
is slower in moving the system out (saturday evening) and provides 
more precipitation than the GFS (saturday morning). Ensemble spread 
covers both solutions so kept a few lingering showers over the 
eastern mountains Saturday night and Sunday. Sunday night and 
Monday dry northwesterly flow will be over eastern Washington and 
Oregon with dry conditions and moderating temperatures. Monday night 
and Tuesday another low will drop from the Gulf of Alaska to 
Vancouver Island. This will bring showers to the Cascades by 
Tuesday. The front ahead of the low may bring a few showers to the 
northeast mountains Tuesday night as well. 


Saturday and Sunday temperatures will be 5 to 10 degrees below 
normal for this time of year and it will be quite cold in the 
mountains at night depending on cloud cover. Low temperatures in the 
mountain valleys could fall to freezing or below. Coonfield 




&& 


Aviation...0z tafs...VFR conditions will prevail through the 
forecast period. Increasing high clouds tonight. Lowering ceilings 
overnight as front moves through early morning. While light rain 
showers are possible after 08z at most taf locations did not include 
in tafs except at kpdt and kalw where terrain and front combine to 
increase chance of showers. Winds increase tomorrow behind front. 76 


&& 


Preliminary point temps/pops... 
PDT 54 72 47 69 / 10 30 10 10 
alw 59 74 53 70 / 10 30 10 10 
psc 59 77 49 73 / 10 20 0 10 
ykm 52 70 44 67 / 10 10 10 10 
hri 59 75 49 72 / 10 20 10 10 
eln 50 70 45 70 / 20 20 10 10 
rdm 43 69 36 67 / 10 20 10 10 
lgd 50 68 41 68 / 10 30 20 10 
gcd 47 74 40 70 / 10 20 20 10 
dls 59 75 52 74 / 20 20 10 10 


&& 


PDT watches/warnings/advisories... 
or...none. 
Washington...none. 
&& 


For additional weather information, check our web site at... 
www.Weather.Gov/Pendleton 


$$ 


91/76/76 



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