Hot afternoons will carry Southern Oregon through much of the coming week before cooler air reaches the region heading into the weekend of October 10–11. From Grants Pass and Medford to the Klamath Basin, the forecast calls for several more days of unusually warm October weather, while coastal communities remain cooler with periods of morning fog.
The weather and travel outlook for Sunday, October 4, through Sunday, October 11, includes mostly dry inland conditions early in the week, nighttime highway construction near Grants Pass and a possible shift toward breezier weather and scattered showers by Friday and Saturday. The closing weekend’s forecast remains preliminary, particularly the timing of rain and the extent of overnight cooling.
Sunday, October 4, will bring a hot afternoon to Josephine and Jackson counties. Medford is forecast to reach approximately 93 degrees, with increasing clouds and light winds, before cooling to around 59 overnight. Grants Pass could reach the upper 90s. Klamath Falls is expected to climb to about 84 degrees, with clouds increasing during the day and an overnight low near 50. Brookings will remain considerably cooler, near 69 degrees, with morning fog giving way to partial sunshine. Drivers traveling toward the coast may encounter reduced visibility where fog lingers.
Monday, October 5, will keep the heat in place across the inland valleys. Medford is expected to reach about 94 degrees under sunny skies, while Grants Pass could again approach the upper 90s. Klamath Falls should reach approximately 85 degrees before falling into the upper 40s overnight. Brookings will remain in the upper 60s with a mixture of sunshine and clouds. Inland travel routes are expected to remain mostly dry, with a substantial temperature difference between early morning departures and afternoon stops.
Tuesday, October 6, brings another sunny, hot day to the Rogue Valley. Medford’s forecast high is approximately 93 degrees, followed by an overnight low near 57. Grants Pass remains in the upper 90s in the current outlook. Klamath Falls should reach about 84 degrees, while Brookings approaches 70. Travelers moving between the coast and inland communities will encounter markedly different conditions, with mild coastal afternoons giving way to much warmer temperatures farther inland.
Wednesday, October 7, is expected to continue the week’s hottest stretch. Medford could reach approximately 95 degrees, and Grants Pass may again approach 100. Klamath Falls is forecast near 85 degrees, with nighttime temperatures returning to the upper 40s. Brookings should remain near 69 degrees. Sunshine will dominate inland, keeping afternoon conditions hot for outdoor work, recreation and roadside stops throughout Jackson and Josephine counties.
Thursday, October 8, will remain hot in Medford, where the afternoon high is forecast near 94 degrees. Grants Pass’ current outlook suggests some cooling into the upper 80s, although temperatures across the interior will remain unusually warm for October. Klamath Falls should reach approximately 84 degrees, and Brookings could warm into the mid-70s. Southwest breezes may increase east of the Cascades during the afternoon as the region begins moving toward a different weather pattern.
Friday, October 9, is expected to bring more widespread cooling. Medford’s forecast high drops to approximately 83 degrees, while Klamath Falls falls to around 75. Grants Pass could remain in the mid-80s, and Brookings is forecast near 71 with a possible afternoon shower. An approaching cold front may produce gustier winds, particularly east of the Cascades. Rain chances remain limited, with uncertainty over when the front will arrive and how much moisture it will carry.
Saturday, October 10, should bring a more pronounced change across Southern Oregon. Medford is forecast near 70 degrees, with Grants Pass around 71, Brookings in the mid-60s and Klamath Falls near 65. Light showers are possible in western portions of the region, although widespread soaking rain is not established in the forecast. The Klamath Basin could cool to near freezing overnight. Travelers crossing between the Rogue Valley, coastal communities and higher inland terrain will encounter substantially cooler conditions than those earlier in the week.
Sunday, October 11, currently points toward afternoon temperatures near 69 degrees in Medford and Grants Pass, approximately 66 in Brookings and around 61 in Klamath Falls. Sunshine or partial clearing is possible, followed by another cold night inland. This extended outlook is less certain than the early-week forecast, and the position of the departing weather system will determine whether clouds or isolated showers persist.
Nighttime construction will also affect some trips near Grants Pass. The northbound Interstate 5 entrance ramp at Exit 58 is listed for intermittent closures between 7 p.m. and 7 a.m., with an estimated completion date of October 8. Drivers entering the freeway during those hours may need an alternate route. Posted signs and current road information will determine which ramps are available as work progresses.
Along the southern coast, recurring night and morning fog may reduce visibility on portions of U.S. 101 and connecting roads. Offshore, gusty northerly winds and steep seas will present additional concerns for boaters during the first part of the week. Inland, the combination of heat and dry vegetation will keep fire concerns elevated before the cooler air arrives. As of Saturday afternoon, no Oregon land-based weather advisories were listed in the regional forecast discussion, while small craft advisories remained in effect for coastal waters.