Southern Oregon enters the third week of May with a broad stretch of mild temperatures, increasing sunshine and improving travel conditions across much of the region. Forecast models and regional weather services indicate a transition from the cooler, unsettled conditions seen earlier this month into a warmer and drier pattern expected to hold through next weekend. Communities throughout the Rogue Valley, Interstate 5 corridor, the Cascades and portions of the South Coast are expected to experience a mix of cool mornings, comfortable afternoons and gradually rising daytime temperatures.
Sunday begins with partly cloudy skies across Grants Pass, Medford and surrounding communities before sunshine returns through the afternoon. Temperatures are expected to climb into the mid-60s to low 70s in valley locations, while higher elevations near Crater Lake and the Cascades remain significantly cooler. Drivers crossing mountain passes during the early morning hours could encounter pockets of fog and lingering moisture from overnight conditions. Coastal communities near Brookings and Gold Beach are expected to remain cooler with marine cloud cover and temperatures in the upper 50s to low 60s.
Monday marks the beginning of a warming trend throughout Southern Oregon. Clearer skies are expected across Josephine, Jackson and Douglas counties, with afternoon highs pushing into the low to mid-70s in inland valleys. Interstate 5 travel conditions are expected to improve considerably as dry pavement and lighter winds settle into the region. Outdoor recreation areas, including the Rogue River corridor and Applegate Valley, are expected to see favorable conditions for hiking, fishing and camping.
Tuesday brings another noticeable temperature increase. Medford and Grants Pass could approach the upper 70s while Klamath Falls remains cooler but sunny in the high desert climate east of the Cascades. Winds are expected to remain relatively light, although afternoon breezes may develop through open valley areas and higher terrain. Travelers heading toward the Oregon Coast should anticipate cooler ocean air and occasional low clouds during the morning hours before partial afternoon clearing develops.
Wednesday is expected to be one of the warmest days of the week so far. Inland temperatures may rise into the low 80s across portions of the Rogue Valley, while areas near Ashland could see even warmer afternoon readings. Dry weather and extended sunshine are likely to increase traffic toward rivers, parks and lakes throughout Southern Oregon. Highway travel conditions across Interstate 5, Highway 62 toward Crater Lake and Highway 199 toward the coast are expected to remain favorable, though construction zones and seasonal road work could create intermittent delays.
Thursday continues the warming pattern with temperatures remaining above seasonal averages across much of Southern Oregon. Morning conditions are expected to remain cool and calm before warmer afternoon air settles across inland communities. The National Weather Service has also continued monitoring dry conditions that could elevate early fire season concerns later this month if warmer weather persists.
Friday may bring slightly cooler temperatures to portions of the region as weak marine air attempts to push inland from the Pacific Coast. Even so, most valley communities are expected to remain dry with highs still reaching the 70s. Coastal travelers should prepare for stronger afternoon winds along exposed beaches and highway corridors near Curry County.
Saturday is expected to return to warmer conditions with sunshine dominating much of the forecast area. Outdoor events, recreation traffic and tourism activity are likely to increase heading into the Memorial Day travel period. Campgrounds, lakes and mountain destinations throughout Southern Oregon may experience heavier vehicle traffic, especially during the afternoon and evening hours.
By next Sunday, forecasters expect inland temperatures to push toward the low to mid-80s in portions of Jackson and Josephine counties while dry weather remains firmly in place. Overnight lows are still expected to cool efficiently into the 40s and low 50s, creating significant temperature swings between morning and afternoon hours typical for late spring in Southern Oregon.