September in Portland, OR: peak season for golf — great conditions and a wide playing window. Best tee times: mid-morning through early afternoon.
| Average September Weather | |
|---|---|
| Avg daily high | 77°F |
| Avg daily low | 55°F |
| Rainy days | 9 / mo |
| Avg peak wind | 9.5 mph |
Coming out of August's 85°F highs, September cools 8°F to a 77°F average — which actually lands more squarely in the ideal 60–80°F playing range. Rain is still rare; at 9 precip days, September is the third-driest month of the year. Winds clock in at just 9.5 mph, the calmest of any month on the calendar.
That combination — moderate temps, minimal rain, and the lightest winds Portland sees all year — is why the Peak season badge fits. Mornings open around 55°F, so a light layer off the first tee is worth carrying, but by mid-round the 22°F daily swing has you peeling it off. October adds 5 more rainy days and drops highs another 13°F.
With winds at their annual low and rain still uncommon, any tee time from early morning through mid-afternoon works well — though early morning slots at 55°F are the coolest, so if you run cold, a late-morning start lets the temperature climb before you tee off. See how conditions rate hour by hour on our playability scale.
August plays hotter, averaging 85°F highs with only 5 rainy days, so golfers trading August for September give up some heat but gain slightly calmer winds (9.5 mph vs. 9.9 mph) and stay well within playable range. October is where the shift turns significant: highs fall another 13°F to 64°F, rainy days jump by 5 to 14, and Portland's reliable dry stretch effectively ends. September is closer to summer than it is to fall.
Climate normals show the long-term picture, but day-to-day weather varies. Check today's live golf weather score for Portland, OR for the current playability rating, hourly wind, temperature, and the recommended tee time window.
← August in Portland, OR • October in Portland, OR →
Yes — September is about as reliable as Portland gets. Highs average 77°F, winds peak at just 9.5 mph (the calmest month of the year), and only 9 days see precipitation, making it the third-driest month. It's the tail end of peak season before October's rain and cooler temps move in.
Average highs drop 8°F from August's 85°F to September's 77°F, which is actually a more comfortable range for a full round. The bigger change is precipitation: September sees 4 more rainy days than August, so expect slightly less certainty on dry conditions even though overall rain risk remains low.