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Weekend Weather Preview
September 18, 2025 at 01:16 PM EDT
By WeatherBug Meteorologist, Alyssa Robinette
It will start to feel more and more like autumn this weekend as cooler, soggy weather filters into the U.S. Summertime heat still has a firm grip on a few spots.
Saturday
Two cold fronts will impact the Eastern U.S. on Saturday. The first front will hover over the Florida Peninsula into the western Gulf Coast, while the second one will be draped over the northern Plains, Midwest and Mid-Atlantic. Plenty of moisture from both the Pacific Ocean and Gulf will also be transported into the Central U.S.
This will translate into chances of showers and thunderstorms for much of the eastern two-thirds of the nation. The best chance will be found in the Upper Mississippi Valley, central Plains and Southeast. There could be some heavy downpours in the central Plains, which could lead to some localized flooding.
There will be just a slight chance of showers and storms across the rest of the Plains, Midwest, Mid-Atlantic and Deep South on Saturday. Meanwhile, high pressure from Canada will expand southward into the Northeast. It should stay dry here for the start of the weekend.
Farther west, a new weather system and cold front will approach the Northwest. A limited supply of monsoonal moisture will also still linger throughout the Mountain West. Spotty showers and thunderstorms will be in the forecast for northern California, the Great Basin and the central/southern Rockies.
Otherwise, the Northwest, northern Rockies, central and southern California and the Desert Southwest generally stay dry.
The Northeast will be the coolest spot in the nation, with temperatures only peaking in the 50s and 60s. The tallest peaks of the Mountain West will experience 50s and 60s. Highs will be in the upper 60s, 70s and lower 80s for much of the West Coast, Great Basin and Rockies into the northern half of the Plains, Great Lakes and Mid-Atlantic. Expect 80s and 90s for southern California into the Desert Southwest, the southern Plains, Midwest, Deep South and Southeast.
Sunday
The second half of the weekend will highlight two weather systems. The first will be stalled over the East, while the second barrels into the Western U.S. However, there will still be an abundant supply of moisture streaming northward into the Central U.S. As a result, most of the Lower 48 states will see rain and thunderstorms chances.
Rain and thunderstorms will be likely in a few spots. This includes the Northwest into the northern half of the Rockies, the central Plains and Midwest into the Great Lakes and most of the Florida Peninsula. There will be a smaller chance of showers and storms in southern California, the Great Basin, Desert Southwest, southern Plains, Mid-Atlantic and the Gulf and Southeast coasts.
A few spots will stay dry though if you have some late summer plans outside. This includes most of northern and southern California, the northern Plains and Northeast.
Highs temperatures will be in the 50s and 60s for the Northwest, Great Basin and Rockies. Though, the lowest elevations could see the mercury climbing into the 70s. Expect mainly upper 60s, 70s and lower 80s for the northern Plains, Midwest, Great Lakes, Mid-Atlantic and Northeast. Seventies and 80s will also cover most of California, the southern Rockies, High Plains and the Ohio Valley. Extensive 90s are in store for the Desert Southwest, southern Plains, the Deep South and Southeast.
Saturday
Two cold fronts will impact the Eastern U.S. on Saturday. The first front will hover over the Florida Peninsula into the western Gulf Coast, while the second one will be draped over the northern Plains, Midwest and Mid-Atlantic. Plenty of moisture from both the Pacific Ocean and Gulf will also be transported into the Central U.S.
This will translate into chances of showers and thunderstorms for much of the eastern two-thirds of the nation. The best chance will be found in the Upper Mississippi Valley, central Plains and Southeast. There could be some heavy downpours in the central Plains, which could lead to some localized flooding.
There will be just a slight chance of showers and storms across the rest of the Plains, Midwest, Mid-Atlantic and Deep South on Saturday. Meanwhile, high pressure from Canada will expand southward into the Northeast. It should stay dry here for the start of the weekend.
Farther west, a new weather system and cold front will approach the Northwest. A limited supply of monsoonal moisture will also still linger throughout the Mountain West. Spotty showers and thunderstorms will be in the forecast for northern California, the Great Basin and the central/southern Rockies.
Otherwise, the Northwest, northern Rockies, central and southern California and the Desert Southwest generally stay dry.
The Northeast will be the coolest spot in the nation, with temperatures only peaking in the 50s and 60s. The tallest peaks of the Mountain West will experience 50s and 60s. Highs will be in the upper 60s, 70s and lower 80s for much of the West Coast, Great Basin and Rockies into the northern half of the Plains, Great Lakes and Mid-Atlantic. Expect 80s and 90s for southern California into the Desert Southwest, the southern Plains, Midwest, Deep South and Southeast.
Sunday
The second half of the weekend will highlight two weather systems. The first will be stalled over the East, while the second barrels into the Western U.S. However, there will still be an abundant supply of moisture streaming northward into the Central U.S. As a result, most of the Lower 48 states will see rain and thunderstorms chances.
Rain and thunderstorms will be likely in a few spots. This includes the Northwest into the northern half of the Rockies, the central Plains and Midwest into the Great Lakes and most of the Florida Peninsula. There will be a smaller chance of showers and storms in southern California, the Great Basin, Desert Southwest, southern Plains, Mid-Atlantic and the Gulf and Southeast coasts.
A few spots will stay dry though if you have some late summer plans outside. This includes most of northern and southern California, the northern Plains and Northeast.
Highs temperatures will be in the 50s and 60s for the Northwest, Great Basin and Rockies. Though, the lowest elevations could see the mercury climbing into the 70s. Expect mainly upper 60s, 70s and lower 80s for the northern Plains, Midwest, Great Lakes, Mid-Atlantic and Northeast. Seventies and 80s will also cover most of California, the southern Rockies, High Plains and the Ohio Valley. Extensive 90s are in store for the Desert Southwest, southern Plains, the Deep South and Southeast.