Portland

Oregon Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Oregon, the United States of America in September.

Planning a trip to Oregon, the United States of America this September? Here's what you need to know about the weather:

What to Expect in Oregon in September

Oregon, the United States of America is a region in the United States of America. The weather in Oregon in September can be quite varied, with temperatures that range from mild to warm and precipitation levels ranging from low to high. During September, summer is in full swing.

Temperatures

Based on our climate data spanning from 1990-2020, the average maximum temperature is mild in Newport at 18°C (64°F) to warm in Central Point at 29°C (84°F). Nighttime temperatures generally drop to 10°C (50°F) in Central Point and 10°C (50°F) in Newport.

To learn more about the conditions in specific areas of Oregon, the United States of America, check out the map below.

Precipitation

In September, precipitation varies across different areas. From low rainfall in Klamath Falls with an average of 8 mm (0.3 in) to high rainfall in Arch Cape with 124 mm (4.9 in).

Average sunshine

Plenty of sunshine can be expected in numerous places in September. Portland typically receives 236 hours of sunlight, making it ideal for those seeking sunny weather.

Explore Oregon by month

Pick a month to see the average temperature, rainfall and sunshine in Oregon — and find the best time to visit. (based on Portland)

Best Places to Visit in Oregon in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Oregon.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Oregon

What is the weather like in September for some of the most popular destinations in Oregon, the United States of America?

Temperature range in Oregon (September)

Precipitation variation in Oregon (September)

Portland

In September Portland generally has high temperatures with maximum daytime temperatures around 24°C (75°F), minimum nighttime temperatures around 12°C (54°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
28°C (82°F)
24°C (75°F)
18°C (64°F)
Min temperature
14°C (57°F)
12°C (54°F)
8°C (46°F)
Monthly sun hours
298 hours
236 hours
152 hours
Monthly rainfall
11 mm (0.4 in)
41 mm (1.6 in)
86 mm (3.4 in)
Monthly rainy days
3 days
8 days
14 days
Weather conditions

Seaside

In September Seaside generally has pleasant temperatures with maximum daytime temperatures around 21°C (70°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
21°C (70°F)
21°C (70°F)
16°C (61°F)
Min temperature
12°C (54°F)
10°C (50°F)
7°C (45°F)
Monthly sun hours
299 hours
236 hours
149 hours
Monthly rainfall
33 mm (1.3 in)
81 mm (3.2 in)
189 mm (7.4 in)
Monthly rainy days
9 days
11 days
19 days
Weather conditions

Cannon Beach

In September Cannon Beach generally has pleasant temperatures with maximum daytime temperatures around 21°C (70°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

August
September
October
Max temperature
21°C (70°F)
21°C (70°F)
16°C (61°F)
Min temperature
12°C (54°F)
10°C (50°F)
8°C (46°F)
Monthly sun hours
299 hours
236 hours
149 hours
Monthly rainfall
37 mm (1.5 in)
93 mm (3.7 in)
212 mm (8.3 in)
Monthly rainy days
9 days
11 days
19 days
Weather conditions

Depoe Bay

In September Depoe Bay generally has pleasant temperatures with maximum daytime temperatures around 19°C (66°F), minimum nighttime temperatures around 9°C (48°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

August
September
October
Max temperature
20°C (68°F)
19°C (66°F)
17°C (63°F)
Min temperature
11°C (52°F)
9°C (48°F)
8°C (46°F)
Monthly rainfall
22 mm (0.9 in)
62 mm (2.4 in)
162 mm (6.4 in)
Monthly rainy days
7 days
9 days
18 days
Weather conditions

Rockaway Beach

In September Rockaway Beach generally has pleasant temperatures with maximum daytime temperatures around 21°C (70°F), minimum nighttime temperatures around 10°C (50°F) and high monthly rainfall. So on average the conditions are pleasant that month.

August
September
October
Max temperature
21°C (70°F)
21°C (70°F)
15°C (59°F)
Min temperature
11°C (52°F)
10°C (50°F)
7°C (45°F)
Monthly sun hours
299 hours
236 hours
149 hours
Monthly rainfall
32 mm (1.3 in)
105 mm (4.1 in)
252 mm (9.9 in)
Monthly rainy days
9 days
12 days
20 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Oregon, in the United States of America.

Popular cities in September

Day & night temperatures, rainfall and average weather in Oregon in September.

City Weather Day temp Night temp Rainfall
Portland 24°C (75°F) 12°C (54°F) 41 mm (1.6 in)
Seaside 21°C (70°F) 10°C (50°F) 81 mm (3.2 in)
Cannon Beach 21°C (70°F) 10°C (50°F) 93 mm (3.7 in)
Depoe Bay 19°C (66°F) 9°C (48°F) 62 mm (2.4 in)
Rockaway Beach 21°C (70°F) 10°C (50°F) 105 mm (4.1 in)
Hillsboro 25°C (77°F) 10°C (50°F) 36 mm (1.4 in)

Oregon weather in September: frequently asked questions

What is the weather like in Oregon, the United States of America in September?

Oregon, the United States of America typically experiences perfect weather in September, part of the summer season. Daytime highs in Portland average around 24°C (75°F), and temperatures drop to about 12°C (54°F) at night.

What is the average temperature in Oregon, the United States of America in September?

Portland averages a daytime maximum of 24°C (75°F) in September, with overnight lows close to 12°C (54°F).

Does Oregon, the United States of America get a lot of rain in September?

Not particularly. Portland averages just 41 mm (1.6 in) of rain in September, making it a mostly dry month for Oregon, the United States of America.

Is September a Good Time to Visit Oregon, the United States of America?

We believe that September is one of the best times to visit Oregon, the United States of America with overall perfect weather in Portland. It's worth noting that weather conditions might differ depending on the location you visit.

On average, the best time to visit Oregon, the United States of America is in May, June, July, August and September with generally perfect weather in Portland. In contrast, January, March, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Oregon.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

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