Southern Oregon begins the first week of March with a familiar reminder that winter is not quite finished. From the Rogue Valley floor to the Siskiyou Summit, drivers can expect a mix of steady rain, periodic mountain snow, fluctuating temperatures, and shifting road conditions through next Sunday.
Sunday opens the week under a broad Pacific storm system pushing inland. Throughout Josephine and Jackson counties, valley locations including Grants Pass and Medford will see widespread rain, overcast skies, and cool daytime temperatures generally in the upper 40s to low 50s. Road surfaces will remain wet for much of the day, increasing the risk of hydroplaning during heavier showers. While snow is not expected at lower elevations, higher terrain will tell a different story.
Motorists traveling on Interstate 5 over Siskiyou Summit or heading east toward Crater Lake, Diamond Lake, or Klamath Falls should prepare for winter driving conditions. Snow levels early in the week are projected to hover near pass elevations, meaning bursts of wet snow are possible, particularly overnight and during periods of heavier precipitation. Accumulations may not be extreme, but even light snow combined with truck traffic and temperature swings can create slick stretches and reduced visibility.
Monday continues the unsettled pattern, though rainfall intensity may ease at times. Overnight lows dipping into the 30s in higher elevations could allow moisture on roadways to refreeze before sunrise. Early morning commuters in rural and shaded areas should remain alert for patchy ice. Valley drivers will primarily contend with wet pavement, standing water in low spots, and slower traffic during peak hours.
Tuesday offers a brief improvement. Cloud cover is likely to linger, but precipitation should taper to scattered showers. Temperatures remain seasonably cool, with afternoon highs in the 50-degree range across the Rogue Valley. Travel impacts during this window should be minimal compared to earlier in the week, making Tuesday the most favorable day for longer regional drives.
The midweek shift arrives late Tuesday night into Wednesday as another disturbance approaches the region. Colder air moving in behind the system may lower snow levels once again, increasing the potential for snow showers along mountain corridors. Wednesday appears to be the most weather-sensitive travel day of the week, particularly above 4,500 to 5,000 feet. Drivers crossing Siskiyou Summit or navigating Highways 62, 140, and 97 should anticipate periods of reduced traction, changing visibility, and chain requirements if snowfall intensifies.
Valley communities will likely experience steady rain rather than snow midweek, but heavier showers could lead to ponding on roadways. Saturated soils from repeated storms also increase the possibility of small debris on rural roads, particularly near slopes and drainage areas.
By Thursday and Friday, the overall pattern begins to moderate. Showers become more intermittent, and temperatures gradually edge upward. While mornings may still be cool, afternoon conditions should feel closer to early spring than late winter. Drivers will continue to encounter damp pavement, but widespread travel disruptions appear less likely toward the end of the workweek.
Heading into next weekend, early projections suggest partly cloudy skies and milder afternoons across southern Oregon. High temperatures may climb into the upper 50s and possibly low 60s in some valley locations. Mountain snow chances diminish but do not disappear entirely, as March remains a transitional month capable of quick weather reversals.
Wind is not expected to be a dominant factor this week, though brief gusts may accompany passing showers. The primary concerns for motorists remain wet roads, fluctuating mountain snow levels, and overnight refreezing in higher elevations.
Early March historically brings variability to southern Oregon. It is not uncommon to experience rain in the valleys and snow over the passes within the same afternoon. For drivers, flexibility and preparation remain essential. Checking pass conditions before departure, allowing additional travel time, and remaining cautious during early morning and nighttime hours will help reduce risk.
The week ahead does not signal a major winter storm event, but it does present steady, evolving weather that demands attention. Southern Oregon’s roadways will stay busy, damp, and at times slick as the region moves gradually toward spring.