Portland

Oregon Weather in August

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

Thinking about venturing to Oregon, the United States of America this August and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in Oregon in August

Oregon, the United States of America is a region in the United States of America. Oregon, the United States of America offers a broad spectrum of weather patterns. In August, one might encounter temperatures that range from mild to very warm, and precipitation levels ranging from almost none to moderate. During August, summer is in full swing.

Temperatures

During the day temperatures vary from mild in Newport at 18°C (64°F) to very warm in Ontario at 33°C (91°F). At night it cools down to 14°C (57°F) in Ontario and 10°C (50°F) in Newport. On average, August is the warmest month of the year in Oregon, the United States of America. So be prepared and pack summer clothes.

To explore the conditions in Oregon, the United States of America in more detail, check the map below.

Precipitation

In August, precipitation varies across different areas. From almost no rainfall in Hermiston with an average of 4 mm (0.2 in) to moderate rainfall in Arch Cape with 43 mm (1.7 in). Based on climate data from the last 30 years, Portland typically sees the least rain in this month, making it the driest month of the year.

Average sunshine

Several destinations enjoy plenty of sunshine this month. Portland sees close to 298 hours of sunlight, making it great for sun lovers.

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 August

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 August for some of the most popular destinations in Oregon, the United States of America?

Temperature range in Oregon (August)

Precipitation variation in Oregon (August)

Portland

In August Portland generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 14°C (57°F) and low monthly rainfall. So on average the conditions are perfect that month.

July
August
September
Max temperature
27°C (81°F)
28°C (82°F)
24°C (75°F)
Min temperature
14°C (57°F)
14°C (57°F)
12°C (54°F)
Monthly sun hours
332 hours
298 hours
236 hours
Monthly rainfall
14 mm (0.6 in)
11 mm (0.4 in)
41 mm (1.6 in)
Monthly rainy days
4 days
3 days
8 days
Weather conditions

Seaside

In August Seaside generally has pleasant temperatures with maximum daytime temperatures around 21°C (70°F), minimum nighttime temperatures around 12°C (54°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

July
August
September
Max temperature
21°C (70°F)
21°C (70°F)
21°C (70°F)
Min temperature
11°C (52°F)
12°C (54°F)
10°C (50°F)
Monthly sun hours
330 hours
299 hours
236 hours
Monthly rainfall
29 mm (1.1 in)
33 mm (1.3 in)
81 mm (3.2 in)
Monthly rainy days
8 days
9 days
11 days
Weather conditions

Cannon Beach

In August Cannon Beach generally has pleasant temperatures with maximum daytime temperatures around 21°C (70°F), minimum nighttime temperatures around 12°C (54°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

July
August
September
Max temperature
21°C (70°F)
21°C (70°F)
21°C (70°F)
Min temperature
11°C (52°F)
12°C (54°F)
10°C (50°F)
Monthly sun hours
330 hours
299 hours
236 hours
Monthly rainfall
31 mm (1.2 in)
37 mm (1.5 in)
93 mm (3.7 in)
Monthly rainy days
8 days
9 days
11 days
Weather conditions

Depoe Bay

In August Depoe Bay generally has pleasant temperatures with maximum daytime temperatures around 20°C (68°F), minimum nighttime temperatures around 11°C (52°F) and low monthly rainfall. So on average the conditions are perfect that month.

July
August
September
Max temperature
19°C (66°F)
20°C (68°F)
19°C (66°F)
Min temperature
11°C (52°F)
11°C (52°F)
9°C (48°F)
Monthly rainfall
18 mm (0.7 in)
22 mm (0.9 in)
62 mm (2.4 in)
Monthly rainy days
7 days
7 days
9 days
Weather conditions

Rockaway Beach

In August Rockaway Beach generally has pleasant temperatures with maximum daytime temperatures around 21°C (70°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

July
August
September
Max temperature
21°C (70°F)
21°C (70°F)
21°C (70°F)
Min temperature
11°C (52°F)
11°C (52°F)
10°C (50°F)
Monthly sun hours
330 hours
299 hours
236 hours
Monthly rainfall
29 mm (1.1 in)
32 mm (1.3 in)
105 mm (4.1 in)
Monthly rainy days
7 days
9 days
12 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 August

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

City Weather Day temp Night temp Rainfall
Portland 28°C (82°F) 14°C (57°F) 11 mm (0.4 in)
Seaside 21°C (70°F) 12°C (54°F) 33 mm (1.3 in)
Cannon Beach 21°C (70°F) 12°C (54°F) 37 mm (1.5 in)
Depoe Bay 20°C (68°F) 11°C (52°F) 22 mm (0.9 in)
Rockaway Beach 21°C (70°F) 11°C (52°F) 32 mm (1.3 in)
Hillsboro 28°C (82°F) 12°C (54°F) 11 mm (0.4 in)

Oregon weather in August: frequently asked questions

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

In August, Oregon, the United States of America generally has perfect weather conditions. Portland sees daytime temperatures near 28°C (82°F), with nights cooling to roughly 14°C (57°F).

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

Average temperatures in Oregon, the United States of America during August range from a nighttime low near 14°C (57°F) to a daytime high around 28°C (82°F) in Portland.

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

August is on the drier side in Oregon, the United States of America. Portland averages only about 11 mm (0.4 in), with most days staying dry.

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

We consider August to be one of the best times to travel to Oregon, the United States of America. Typically, the climate in Portland is perfect.

Generally speaking, May, June, July, August and September provide 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.

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