Spokane, WA – Warm September sunshine holds strong across eastern Washington this week, but a noticeable cooldown arrives by Friday. Drivers along I-90 and across Spokane County can expect daytime highs climbing into the 80s through Thursday before dipping into the mid-70s by the weekend.
According to the National Weather Service in Spokane, Tuesday’s high will reach 80 degrees with calm winds and clear skies. Temperatures climb further on Wednesday, pushing 86 degrees under bright sunshine. While the days feel warm, nights cool quickly, dropping into the upper 40s and low 50s. Residents should keep windows closed after sunset to maintain comfortable indoor temperatures.
By Thursday, highs settle near 84 degrees before shifting cooler on Friday with a high near 75. This transition signals the first hints of fall weather, as daytime temperatures slide closer to seasonal norms. Farmers and outdoor crews should use midweek warmth to complete fieldwork ahead of cooler mornings and earlier sunsets.
Travelers planning weekend trips across eastern Washington will see mostly clear skies and no major weather hazards. However, the cooler nights could bring patchy morning fog in low-lying valleys. Motorists should allow extra time during early commutes, especially on rural highways and I-90 west of Spokane.
The dry pattern continues into early next week, though forecasters caution that stronger cold fronts are typical by early October. More updates will follow if temperatures trend closer to freezing in valley locations.
Five Day Forecast for Spokane, WA
- Tuesday: Sunny, high 80, low 48
- Wednesday: Sunny, high 86, low 51
- Thursday: Sunny, high 84, low 49
- Friday: Sunny, high 75, low 48
- Saturday: Mostly sunny, high 79, low 51
