The Klamath Basin is about to be hit by its third cold event in less than a week. A Freeze Warning and Frost Advisory are in effect from 2 AM to 8 AM PDT Wednesday across a wide swath of the Oregon-California border region — another round of sub-freezing temperatures for a landscape that has barely had a chance to recover between cold snaps.
Wednesday Brings the Third Cold Event in One Week
The pattern has become striking. A Frost Advisory covered this region on June 3 with temperatures in the 33–36°F range. A hard freeze struck June 7 with readings as low as 22°F — well below what standard sprinkler frost protection can handle.
Now, on June 10, the National Weather Service office in Medford is forecasting sub-freezing temperatures of 27 to 32°F in the core of the Klamath Basin, with a surrounding Frost Advisory for the broader area.
Three cold events. Seven days. In June. For a region already contending with one of the lowest snowpack readings on record — the Klamath Basin came in at 23 percent of median this winter — the relentless cold is piling stress onto an already difficult agricultural season.
The Double Alert: Freeze Warning vs. Frost Advisory
The two alerts cover distinct but overlapping areas. The Freeze Warning targets the highest-risk communities: Chemult, Crescent, Gilchrist, Sprague River, Bly and the Winter Rim area of Klamath and Lake counties in Oregon. Temperatures of 27 to 32°F are forecast — cold enough to damage crops even with protective covering.
The surrounding Frost Advisory extends across a wider zone: Oregon’s Klamath Basin and central-eastern Lake County, plus California’s Modoc County and eastern and south-central Siskiyou County. That area includes Klamath Falls, Lakeview, Alturas, Dorris, Tulelake, Canby, Likely, Valley Falls and surrounding communities.
As the Medford office noted, freeze conditions could “kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing” — a warning that now applies, in some form, for the third time this week.
A Region That Sees Cold in Any Month
This persistent cold snap is unusual even by the standards of a basin known for late-season cold. The NWS Medford frost climatology confirms that the Klamath Falls area can experience freezing temperatures in every month of the year — but three events in one week is extraordinary for early June.
What to Protect Before Wednesday Morning
With two days’ experience under their belts, growers and gardeners in the basin know the drill. Heavy frost cloth is more effective than light covers at temperatures approaching 27°F. Exposed outdoor pipes and faucets should be insulated or drained before midnight. Livestock water sources should be checked. Potted plants should come inside.
Monitor the latest forecasts at weather.gov/mfr. The cold is expected to ease through Wednesday morning as temperatures recover ahead of what should be a warmer pattern arriving later in the week.
