Freeze Warning
Ends in 1 h 38 min
When
From 11 PM this evening to 10 AM PDT Saturday.
Where
Eastern Columbia River Gorge of Oregon and Washington, Lower Columbia Basin of Oregon and Washington, Foothills of the Northern Blue Mountains of Oregon, Yakima Valley, and Foothills of the Blue Mountains of Washington.
Issued for this forecast zone · National Weather Service Pendleton OR
What, impacts and precautionsHide details
What
Sub-freezing temperatures of 25 to 32 expected.
Impacts
Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Eastern Columbia River Gorge of Oregon; Lower Columbia Basin of Oregon; Foothills of the Northern Blue Mountains of Oregon; Eastern Columbia River Gorge of Washington; Yakima Valley; Lower Columbia Basin of Washington; Foothills of the Blue Mountains of Washington
See it on weather.gov (opens in a new tab)

Observed 7:15 AM PDT at K1S5

Sunnyside, WA weather

Freeze Warning. 29°−2° and clear now.

Mostly agree

Now 29°−2°

Clear · Feels like 25°−4°

Wind: 3 mph5 km/h; From the north. Light through 8 PM
Dew point: 27°−3°; Dry · up to 36°2° by 10 AM (comfortable)
Humidity: 94%; Air 29°−2°, dew point 27°−3° · frost likely
UV tomorrow: 3Moderate; Moderate 12–3 PM · peak 3
Air quality: 26Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.26 inHg1025 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

20°11° cooler than this time yesterday (49°9° then, 29°−2° now)

Good hours for

Fog until 10 AM
Above 40°4° today by 10 AM
Below 50°10° tonight after 7 PM
Below freezing tomorrow 7–9 AM (low 31°−1°)
Fog Monday from 6 AM

This morningUp to 46°8° by 11 AM · Mostly cloudy · freezing, low 30°−1°
This afternoonUp to 59°15° by 4 PM · Mostly cloudy
TonightDown to 33°1° by 4 AM · Mostly cloudy
Tomorrow morningUp to 47°8° by 11 AM · freezing, low 31°−1° · Mostly cloudy
Tomorrow afternoonUp to 58°14° by 4 PM · rain chance 10% · Mostly cloudy
Tomorrow nightDown to 36°2° by 5 AM · rain chance 10% · Partly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 8a	Fog	30°−1° (likely 30°−1° to 36°2°)	30°−1°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	73%	0
Sat 9a	Fog	34°1° (likely 33°1° to 39°4°)	34°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	78%	0
Sat 10a	Cloudy	40°4° (likely 36°2° to 43°6°)	40°4°	0%	0 mph0 km/h, gusts 3 mph4 km/h	86%	79%	1
Sat 11a	Partly sunny	46°8° (likely 42°6° to 48°9°)	46°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	71%	69%	1
Sat 12p	Mostly cloudy	51°11° (likely 47°8° to 53°12°)	51°11°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	60%	63%	2
Sat 1p	Cloudy	55°13° (likely 52°11° to 56°13°)	55°13°	0%	1 mph2 km/h from E, gusts 9 mph14 km/h	54%	62%	2
Sat 2p	Cloudy	57°14° (likely 55°13° to 58°14°)	57°14°	0%	2 mph3 km/h from E, gusts 10 mph17 km/h	50%	69%	2
Sat 3p	Cloudy	57°14° (likely 57°14° to 59°15°)	57°14°	0%	2 mph3 km/h from E, gusts 11 mph17 km/h	47%	66%	1
Sat 4p	Cloudy	59°15° (likely 57°14° to 59°15°)	59°15°	0%	2 mph3 km/h from E, gusts 11 mph18 km/h	46%	64%	1
Sat 5p	Cloudy	57°14° (likely 55°13° to 57°14°)	57°14°	0%	2 mph3 km/h from SE, gusts 11 mph17 km/h	50%	66%	1
Sat 6p	Cloudy	54°12° (likely 49°9° to 54°12°)	54°12°	0%	2 mph3 km/h from E, gusts 8 mph13 km/h	59%	65%	0
Sat 7p	Cloudy	49°9° (likely 46°8° to 51°11°)	49°9°	0%	1 mph2 km/h from E, gusts 7 mph12 km/h	72%	59%	0
Sat 8p	Cloudy	43°6° (likely 43°6° to 48°9°)	43°6°	0%	1 mph2 km/h from E, gusts 7 mph11 km/h	82%	78%	0
Sat 9p	Cloudy	42°6° (likely 42°6° to 47°8°)	42°6°	0%	0 mph0 km/h, gusts 6 mph10 km/h	84%	77%	0
Sat 10p	Cloudy	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	87%	77%	0
Sat 11p	Cloudy	39°4° (likely 39°4° to 46°8°)	39°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	88%	79%	0
Sun 12a	Cloudy	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	79%	0
Sun 1a	Cloudy	37°3° (likely 37°3° to 44°7°)	37°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	91%	80%	0
Sun 2a	Cloudy	36°2° (likely 36°2° to 43°6°)	36°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	80%	0
Sun 3a	Fog	35°2° (likely 35°2° to 42°6°)	35°2°	0%	0 mph0 km/h, gusts 3 mph4 km/h	96%	73%	0
Sun 4a	Cloudy	33°1° (likely 33°1° to 42°6°)	33°1°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	71%	0
Sun 5a	Cloudy	33°1° (likely 33°1° to 41°5°)	33°1°	0%	0 mph0 km/h, gusts 2 mph4 km/h	95%	68%	0
Sun 6a	Cloudy	33°1° (likely 33°1° to 41°5°)	33°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	96%	69%	0
Sun 7a	Cloudy	31°−1° (likely 31°−1° to 40°4°)	31°−1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	74%	0
Sun 8a	Cloudy	32°0° (likely 32°0° to 41°5°)	32°0°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	82%	0
Sun 9a	Cloudy	36°2° (likely 36°2° to 44°7°)	36°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	96%	78%	0
Sun 10a	Cloudy	42°6° (likely 42°6° to 48°9°)	42°6°	0%	0 mph0 km/h, gusts 2 mph3 km/h	79%	74%	1
Sun 11a	Cloudy	47°8° (likely 47°8° to 52°11°)	47°8°	0%	0 mph0 km/h, gusts 3 mph4 km/h	66%	80%	2
Sun 12p	Cloudy	51°11° (likely 51°11° to 55°13°)	51°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	57%	81%	3
Sun 1p	Cloudy	55°13° (likely 54°12° to 57°14°)	55°13°	0%	0 mph0 km/h, gusts 4 mph7 km/h	52%	78%	3
Sun 2p	Cloudy	56°13° (likely 56°13° to 59°15°)	56°13°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	50%	82%	3
Sun 3p	Cloudy	57°14° (likely 57°14° to 61°16°)	57°14°	0%	1 mph2 km/h from E, gusts 7 mph11 km/h	50%	82%	2
Sun 4p	Cloudy	58°14° (likely 57°14° to 62°17°)	58°14°	0%	1 mph2 km/h from E, gusts 8 mph12 km/h	51%	83%	1
Sun 5p	Cloudy	56°13° (likely 55°13° to 59°15°)	56°13°	10%	1 mph2 km/h from NW, gusts 8 mph13 km/h	55%	83%	1
Sun 6p	Cloudy	54°12° (likely 52°11° to 55°13°)	54°12°	10%	1 mph2 km/h from NW, gusts 5 mph8 km/h	63%	83%	0
Sun 7p	Cloudy	49°9° (likely 48°9° to 52°11°)	49°9°	10%	1 mph2 km/h from NW, gusts 7 mph12 km/h	73%	43%	0
Sun 8p	Cloudy	45°7° (likely 45°7° to 50°10°)	45°7°	10%	1 mph2 km/h from NW, gusts 7 mph12 km/h	82%	82%	0
Sun 9p	Clear	43°6° (likely 43°6° to 49°9°)	43°6°	10%	1 mph2 km/h from NW, gusts 5 mph9 km/h	87%	45%	0
Sun 10p	Cloudy	42°6° (likely 42°6° to 49°9°)	42°6°	10%	1 mph2 km/h from NW, gusts 5 mph9 km/h	89%	71%	0
Sun 11p	Cloudy	42°6° (likely 40°4° to 48°9°)	42°6°	10%	0 mph0 km/h, gusts 5 mph8 km/h	90%	65%	0
Mon 12a	Clear	41°5° (likely 38°3° to 47°8°)	41°5°	10%	0 mph0 km/h, gusts 3 mph5 km/h	94%	19%	0
Mon 1a	Clear	39°4° (likely 36°2° to 47°8°)	39°4°	10%	0 mph0 km/h, gusts 4 mph6 km/h	97%	25%	0
Mon 2a	Cloudy	38°3° (likely 34°1° to 46°8°)	38°3°	10%	0 mph0 km/h, gusts 6 mph9 km/h	100%	68%	0
Mon 3a	Partly cloudy	37°3° (likely 35°2° to 46°8°)	37°3°	10%	0 mph0 km/h, gusts 6 mph10 km/h	100%	59%	0
Mon 4a	Cloudy	37°3° (likely 34°1° to 47°8°)	37°3°	10%	0 mph0 km/h, gusts 5 mph8 km/h	100%	77%	0
Mon 5a	Cloudy	36°2° (likely 34°1° to 47°8°)	36°2°	10%	0 mph0 km/h, gusts 4 mph7 km/h	100%	77%	0
Mon 6a	Fog	35°2° (likely 28°−2° to 47°8°)	35°2°	10%	0 mph0 km/h, gusts 3 mph5 km/h	100%	77%	0
Mon 7a	Fog	35°2° (likely 28°−2° to 49°9°)	35°2°	10%	0 mph0 km/h, gusts 4 mph6 km/h	100%	77%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Fog. High 59°15°, low 31°−1°. Typical 60°16° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Fog, 33°1°
  Dry
Official NWS forecast
Today: Widespread frost and patchy fog before 11am. Partly sunny. High near 59, with temperatures falling to around 57 in the afternoon. East wind around 2 mph.
Tonight: Patchy fog after 11pm. Mostly cloudy. Low around 31, with temperatures rising to around 33 overnight. Northeast wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
57°14°–59°15°
Low, likely
28°−2°–36°2°
Typical high / low
60°16° / 38°3°
Wind
8 mph13 km/h, gusts 14 mph23 km/h
UV peak
3
Tomorrow, Oct 25. Cloudy. High 59°15°, low 34°1°. Typical 60°16° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 58°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 45°7°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 36°2°
  Dry
Official NWS forecast
Day: Patchy fog before 8am, then widespread frost and patchy fog between 8am and 11am. Cloudy. High near 59, with temperatures falling to around 56 in the afternoon. Northeast wind around 1 mph.
Night: Patchy fog after 11pm. Mostly cloudy, with a low around 34. Northwest wind around 1 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
57°14°–62°17°
Low, likely
34°1°–40°4°
Typical high / low
60°16° / 38°3°
Wind
8 mph12 km/h
UV peak
3
Monday, Oct 26. Cloudy. High 59°15°, low 32°0°. Typical 59°15° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 42°6°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°10°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 40°4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 11am. Partly sunny, with a high near 59. Northeast wind around 1 mph.
Night: Partly cloudy, with a low around 32.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–61°16°
Low, likely
32°0°–44°7°
Typical high / low
59°15° / 38°3°
Wind
9 mph14 km/h
UV peak
3
Tuesday, Oct 27. Partly sunny. High 61°16°, low 32°0°. Typical 59°15° / 37°3°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Partly sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 42°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 61.
Night: A slight chance of rain showers after 5am. Mostly cloudy, with a low around 32. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 61°16°).
High, likely
57°14°–62°17°
Low, likely
32°0°–44°7°
Typical high / low
59°15° / 37°3°
Wind
18 mph28 km/h, gusts 27 mph44 km/h
UV peak
3
Wednesday, Oct 28. Showers. High 58°14°, low 30°−1°. Typical 58°14° / 37°3°. Rain 0.01 in0.3 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers. Partly sunny, with a high near 58.
Night: A slight chance of rain showers. Mostly cloudy, with a low around 30.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–60°16°
Low, likely
30°−1°–43°6°
Typical high / low
58°14° / 37°3°
Wind
18 mph30 km/h
UV peak
3
Thursday, Oct 29. Cloudy. High 54°12°, low 27°−3°. Typical 58°14° / 36°2°. Rain 0.02 in0.5 mm, 20% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 55°13°
  Dry
3. Evening
  6 PM–midnight
  Clear, 45°7°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers before 11am. Partly sunny, with a high near 54.
Night: Partly cloudy, with a low around 27.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
53°12°–55°13°
Low, likely
27°−3°–40°4°
Typical high / low
58°14° / 36°2°
Wind
13 mph22 km/h, gusts 21 mph33 km/h
UV peak
3
Friday, Oct 30. Partly sunny. High 54°12°, low 27°−3°. Typical 57°14° / 36°2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 52°11°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 54.
Night: Partly cloudy, with a low around 27.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
50°10°–54°12°
Low, likely
27°−3°–39°4°
Typical high / low
57°14° / 36°2°
Wind
6 mph10 km/h
UV peak
3
Saturday, Oct 31. Cloudy. High 50°10°, low 34°1°. Typical 57°14° / 36°2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 35°1°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 49°10°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 42°6°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 35°2°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
46°8°–51°11°
Low, likely
27°−3°–39°4°
Typical high / low
57°14° / 36°2°
Wind
7 mph11 km/h, gusts 14 mph22 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 53°12°, low 36°2°. Typical 56°13° / 36°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 53°11°
  Dry
3. Evening
  6 PM–midnight
  Clear, 45°7°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
47°8°–58°14°
Low, likely
27°−3°–43°6°
Typical high / low
56°13° / 36°2°
Wind
7 mph11 km/h
UV peak
2
Monday, Nov 2. Cloudy. High 53°12°, low 38°3°. Typical 56°13° / 35°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 54°12°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 45°7°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
47°8°–58°14°
Low, likely
33°1°–41°5°
Typical high / low
56°13° / 35°2°
Wind
6 mph9 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 59°, low 31°.
Tomorrow
Dry, high 59°, low 34°.
Monday
Dry, high 59°, low 32°.
Rest of week
Mostly dry, highs 50–61°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (PDT) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Columbia River below Priest Rapids Dam

23 mi

Below flood stage

Level: 7.1 ft
Flow: 44,200 cfs

Forecast peak 13.2 ft Mon 4 AM

Reading from Sat 7:15 AM · NWS gauge page

Yakima River near Parker

24 mi

Below flood stage

Level: 2.1 ft
Flow: 1,250 cfs

Forecast peak 2.1 ft Thu 11 AM

Reading from Sat 6:30 AM · NWS gauge page

Toppenish Creek above Toppenish Creek

17 mi

Level: 1.2 ft
Flow: 27 cfs

Reading from Sat 7:15 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 65% less heating than a typical week.

This week 41Typical 120

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 31
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 25 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 27°F). Indoor air will run dry too — a humidifier keeping indoor relative humidity in the 30–50% range is more comfortable and cuts static shocks, without going so high it fogs cold windows.

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

Prosser · official normals 1991–2020 · records 1925–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

Sunnyside weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 28 min; Losing 3 min 3 s a day; shortest Dec 21, 1 h 52 min less
Golden hour: 5:15–6:16 PM; Morning 7:11–8:12 AM
Blue hour: 6:16–6:28 PM; Morning 6:59–7:11 AM; first light 6:59 AM

Stars tonight? Poor

Clouds most of the night (about 74% cover).

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:46 AM · rises 4:58 PM
Full moon: Oct 25
New moon: Nov 8

Looking west from Sunnyside. The highest point on the skyline is about 14,100 ft, 91 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Freeze Warning