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PORTLAND, Ore. (KOIN) — As we kick off the new week, an upper-level trough of low pressure will bring about cooler temperatures and showery moments to the region come Monday and Tuesday.
Alongside scattered showers, the forecast also calls for a threat of an isolated thunderstorm with the potential of lightning, gusty winds, and heavy downpours. Thunderstorms are expected to be non-severe. The potential stretches from the Willamette Valley to east of the Cascades across the early parts of the week.
For Monday, expect a mainly dry start with a few scattered showers arriving up the I-5 corridor as we head into the evening. On Tuesday, showers may pick up across the morning hours and linger into midday throughout the valley.
Daytime highs over the next few days will sit slightly below-normal. At this point in September, Portland’s average high sits at 79 degrees. But to start off this week, we’ll see highs topping off in the low to mid 70s with much cloud cover.
The overnight lows around PDX are looking to be a bit cooler as we continue through the workweek. Lows are expected to drop into the upper 50s around the greater Portland and Vancouver area.
So, grab those pumpkin spice lattes as you head out the door!
And for those still hoping to keep the summer vibes around, do not worry. A ridge of high pressure returns for the second half of the week with warmer conditions and more sunshine.
Stay with the KOIN 6 Weather Team for the latest on the forecast across the Pacific Northwest.
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Jamie Hudson
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