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Ontario, OR Weather
Current conditions
Observed at Caldwell - Caldwell Industrial Airport · 1 hr ago
Forecast
10-day-
Saturday
Widespread frost between 9am and 10am. Sunny, with a high near 59. West southwest wind around 1 mph.
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Saturday Night
Widespread frost after midnight. Mostly clear, with a low around 30. North northeast wind around 1 mph.
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Sunday
Widespread frost before 11am. Mostly sunny, with a high near 64. East southeast wind around 2 mph.
National Weather Service forecast updated 1 day ago.
Hourly
Hourly forecast- Now57°
- 4 PM58°
- 5 PM59°
- 6 PM57°
- 7 PM53°
- 8 PM47°
- 9 PM43°
- 10 PM41°
- 11 PM38°
- Sun12 AM37°
- 1 AM37°
- 2 AM35°
- 3 AM34°
- 4 AM32°
- 5 AM31°
- 6 AM30°
- 7 AM31°
- 8 AM31°
- 9 AM32°
- 10 AM36°
- 11 AM43°
- 12 PM50°
- 1 PM56°
- 2 PM59°
Daily forecast
Details- FriOct 23Sunny34°61°
- TodayOct 24Widespread Frost then Sunny30°59°
- SunOct 25Widespread Frost then Mostly Sunny35°64°
- MonOct 26Areas Of Frost then Mostly Sunny20%35°65°
- TueOct 27Chance Rain Showers25%31°60°
- WedOct 28Areas Of Fog then Mostly Sunny32°61°
- ThuOct 29Patchy Fog then Partly Sunny32°60°
- FriOct 30Sunny35°58°
- SatOct 31Cloudy39°58°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Ontario
More weather news-
2026-27 Long-Range Winter Weather Forecast for North AmericaPrepared by OnTheSnow.com Meteorologist Juan V. Portillo On October 8, NOAA’s Climate Prediction Center said El Niño, now under way, has reached 2.1 C above normal in the central Pacific and has a better than 83% chance…
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Hopes for rain dampen as Oregon faces historically dry OctoberHopes for relief from one of the driest Octobers on record have been scaled back again, as this weekend's storm is no longer expected to produce much precipitation. The National Weather Service in Portland says there's…
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First Serious Freeze and Frost Possible Tonight, Friday for Oregon, WashingtonPublished 10/22/2026 at 8:55 p.m. By Oregon Coast Beach Connection Staff The National Weather Service (NWS) in both states have issued a bundle of advisories that involve “brrrrr” as the operative word. Not all of it is…
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Dangerous Frost Warning Issued for 30+ Counties in Washington and Oregon as Temperatures Drop FastNWS Portland has issued Frost Advisories for two straight nights, Thursday night and Friday night, across northwest Oregon and southwest Washington. A Freeze Watch is also in effect Friday night for the Willamette…
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Drought Covers Nearly Nine-Tenths of Oregon as Water Concerns Carry Into FallDrought covers nearly nine-tenths of Oregon as the state enters its autumn recharge season with a substantial precipitation deficit, active drought emergencies across Southern Oregon and firefighters still working to…
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Elevated Sneaker Wave Threat Along N. Oregon Coast, S. Washington CoastPublished 10/20/2026 at 7:55 p.m. By Oregon Coast Beach Connection Staff (Waldport, Oregon) – The National Weather Service (NWS) is saying there is an increased threat of sneaker waves on the northern half of the Oregon…
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When should Central Oregon drivers switch to winter tires? What to know before the cold arrivesBEND, Ore. (KTVZ) — Fall is just getting underway, but now is a good time for Central Oregon drivers to start thinking about getting their vehicles ready for winter.Les Schwab says drivers planning to travel in snow…
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A 'Super' El Niño is coming, and Oregon's winter is a coin flipWhat does El Niño mean for Oregon and the Pacific Northwest? A University of Oregon assistant professor of geography who specializes in climate explains. Map showing predicted average sea surface temperature (SST)…
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Oregon may see Cascade snow as record-warm October turns coolerLight snow could fall on Cascade Mountain roads next weekend — Oct. 24 to 25. After one of the warmest and driest Octobers on record, it should start to feel like autumn late this week and next weekend. The Cascade…
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Nearly 90% of Oregon is in drought as rain year beginsPORTLAND, Ore. (KATU) — Rain has started trickling into the Pacific Northwest for the season. October 1 marks the beginning of the new rain year, and in Portland, we’ve seen about 0.1” so far through the month, which is…
Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Ontario, OR reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyOntario Area, records since 1945. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.