Portland’s first real soaker of fall is here. Overflowing gutters are telling you something.

Portland, Ore. — Oct. 25, 2026. The rain Portland has been waiting on showed up Sunday morning. KPTV FOX 12 reported that steady rain arrived early and that several locations had passed half an inch since midnight, with one to two inches possible by the end of the month. For a lot of homeowners it was also the first time this fall they watched water pour over the front of a gutter instead of down the downspout.

That timing is not a coincidence. Just a week earlier, KPTV chief meteorologist Mark Nelsen wrote that there was “no sign of a wet season start or stormy weather for at least another 7-10 days,” with high pressure steering storms into California. Leaves, fir needles and roof grit kept falling the whole time. Today’s rain is the first water to move all of it at once.

What happened

A dry October ended all at once

KPTV’s Sunday forecast called the rain overdue: “Well, we certainly needed this rain!” The same forecast put the wettest part of Monday in the morning and early afternoon, a soggy Monday night into Tuesday, and fast-moving showers into Wednesday, with up to an inch of additional rain over three days and snow levels around 4,000 to 5,000 feet.

None of that is a record storm. It is a normal start to Portland’s wet season. But normal is what most gutters in town are sized for, and the National Weather Service’s 30-year averages show how fast the volume ramps up from here.

The angle most coverage missed

Why the first storm after a dry spell is the hard one

Forecasts treat the end of a dry stretch as good news, and for gardens and fire danger it is. For gutters it works the other way. During dry weeks, leaves and needles land in the trough and stay light and loose. Nothing moves them. The first steady rain floats that whole layer toward the low end of each run, which is exactly where the outlet sits.

On most Portland homes the clog forms right there, at the hole where the gutter drains into the downspout, often around a wad of maple leaves or a mat of Douglas fir needles. Once that spot is plugged, the rest of the gutter fills like a trough with the drain closed. That is why one corner of the house overflows while the rest looks fine.

The volume is bigger than most people picture. Every inch of rain on 1,000 square feet of roof is about 623 gallons of water. On a 2,000-square-foot roof, the half inch that fell by Sunday afternoon is roughly 623 gallons, all of it headed for a handful of downspouts.

1. Rain today 623 gal

   ½ inch on a 2,000 sq ft roof

   Roughly what KPTV said several locations had by Sunday afternoon.

2. One inch 1,247 gal

   1 inch on the same roof

   KPTV’s outlook for more rain over the next three days.

3. October normal 4,263 gal

   3.42 inches

   A normal October at PDX, all of it through your gutters.

4. November normal 6,794 gal

   5.45 inches

   The month ahead, per the National Weather Service.

Math: inches of rain × roof square feet × 0.623 gallons. Want the number for your own roofline and downspouts? Try our roof runoff and gutter sizing calculator.

Read your gutters in the rain

Five things your gutters showed you today, and what each one means

1. Water sheeting over the front edge in one section

Almost always a blocked outlet or downspout at the low end of that run. The gutter itself is fine. It needs a gutter cleaning and a downspout flush.

2. Water dripping behind the gutter, between it and the fascia

This one is different. It can mean the gutter has pulled away, the pitch is off, or a seam is open. It is the overflow that rots fascia boards, so it’s worth a gutter repair check, not just a cleaning.

3. A gutter full of water while the downspout is quiet

The blockage is in the downspout or the elbow at the bottom, not the trough. Leaves compress into a plug at the first bend.

4. Water splashing at the corners

Inside corners and valleys concentrate runoff from two roof planes. A little splash is normal in a downpour. A steady sheet means the corner is undersized or blocked.

5. Splashing, washed-out mulch or a puddle at the downspout base

The gutter is doing its job, but the water is landing too close to the house. Check that the downspout has an extension and that the ground slopes away.

What to do now

What to do before the next round of rain

• Write down where it overflowed. Front of the house, back corner, over the porch. It turns a guess into a quick fix.

• Stay off the ladder while it’s wet. Wet roofs, wet rungs and soft ground are how most DIY gutter falls start.

• Clean during the next dry window, not in the rain. A real Portland gutter cleaning clears the trough by hand and flushes every downspout to the ground.

• If the same run overflows every fall under the same tree, ask about gutter guards matched to that tree. They cut down how often you need a cleaning. They don’t eliminate it.

• Read our fall gutter prep guide for the full pre-winter checklist.

Our current gutter cleaning prices start at $295. Most single-story Portland homes fall between $295 and $475, and most two-story homes between $365 and $675. The free virtual estimate gives you a price range for your address without a phone call. If you’d rather talk it through, call (503) 860-6950 or send us a note.