Light Rain Will Visit Portland Tuesday
A 30 percent chance of showers will give way to a dry, warming trend heading into the weekend.
Updated on Sept. 29, 2026 in Current Conditions
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Portland residents will see a 30 percent chance of light rain on Tuesday, September 29, 2026, as a dying weather front moves across the region. Following the brief moisture, dry and uneventful weather is expected to settle in for the remainder of the week.
Why it matters
The shift toward dryer conditions signals the end of the recent weather fluctuation, setting the stage for a significant warmup. After a seasonably mild September 28 where temperatures reached the upper 60s and low 70s, the upcoming rise in mercury will likely define the start of October.
Meteorologists forecast a 30 percent probability of rain in the metro area on Tuesday, followed by a potential weekend high of 80 degrees compared to the recent temperature range of upper 60s and low 70s.
The details
As the front dissipates, it will primarily bring light rain to the North Coast, Kelso, and the Washington Cascades rather than the Portland metro area. Weak ridging is expected to follow, driving a steady increase in temperatures through the end of the work week. By the weekend of October 3-4, Portlanders should prepare for warmer conditions as the high temperature is expected to reach 80 degrees.
Timeline
September 29, 2026: Expected potential for sprinkles in the metro area.
September 30, 2026: Start of an uneventful, dry weather pattern.
October 3-4, 2026: Anticipated warmest days with highs near 80 degrees.
Beyond the Bridges
This transition to a dry, warm autumn pattern follows the annual seasonal shift often monitored by the National Weather Service's Air Quality Index thresholds. The shift marks a departure from the recent cooler, volatile weather conditions observed in late September.
Portlanders should keep an umbrella handy for a brief dampness on Tuesday, though the impact will be minimal. Plan for outdoor weekend activities, as temperatures are set to climb toward 80 degrees by October 3.
The takeaway
Expect a short-lived damp spell on Tuesday before a dry, warming trend takes hold of the city. Keep an eye on the rising temperatures as the mercury approaches the 80-degree mark for the upcoming weekend.
Further reading
For a deeper look at the week ahead, visit the Current Conditions page.
Live Poll
Are you looking forward to the warming temperatures forecast for this upcoming weekend?
