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Oregon Weather in May

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

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Portland Seaside Cannon Beach Depoe Bay

Are you planning a trip a to Oregon, the United States of America in May and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Oregon in May

Oregon, the United States of America is a region in the United States of America. The weather in Oregon in May can be quite varied, with temperatures that range from mild to warm and precipitation levels ranging from low to heavy.

Temperatures

The average maximum daytime temperatures vary from mild in Willamette National Forest at 14°C (57°F) to warm in Boardman at 24°C (75°F). Nighttime temperatures generally drop to 8°C (46°F) in Boardman and 3°C (37°F) in Willamette National Forest.

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

Precipitation

In May, precipitation varies across different areas. From low rainfall in Bend with an average of 21 mm (0.8 in) to heavy rainfall in Arch Cape with 162 mm (6.4 in).

Average sunshine

Sunshine is generally plentiful throughout many areas. Portland enjoys about 276 hours of sunlight, 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)

January8°C (46°F) February11°C (52°F) March13°C (55°F) April16°C (61°F) May20°C (68°F) June23°C (73°F) This monthJuly27°C (81°F) August28°C (82°F) September24°C (75°F) October18°C (64°F) November11°C (52°F) December7°C (45°F)
Best Time to Visit Oregon →

Best Places to Visit in Oregon in May

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

Conditions Temperatures Precipitation
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 May for some of the most popular destinations in Oregon, the United States of America?

Temperature range in Oregon (May)

Precipitation variation in Oregon (May)

Portland

In May Portland generally has pleasant temperatures with maximum daytime temperatures around 20°C (68°F), minimum nighttime temperatures around 9°C (48°F) and moderate monthly rainfall. So on average the conditions are excellent that month.

« April
May
June »
April
May
June
Max temperature
16°C (61°F)
20°C (68°F)
23°C (73°F)
Min temperature
6°C (43°F)
9°C (48°F)
12°C (54°F)
Monthly sun hours
221 hours
276 hours
290 hours
Monthly rainfall
77 mm (3 in)
71 mm (2.8 in)
45 mm (1.8 in)
Monthly rainy days
17 days
13 days
11 days
Weather conditions
good
excellent
excellent
Climate in Portland →

Seaside

In May Seaside generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 7°C (45°F) and high monthly rainfall. So on average the conditions are mixed that month.

« April
May
June »
April
May
June
Max temperature
14°C (57°F)
16°C (61°F)
19°C (66°F)
Min temperature
4°C (39°F)
7°C (45°F)
9°C (48°F)
Monthly sun hours
222 hours
278 hours
291 hours
Monthly rainfall
183 mm (7.2 in)
116 mm (4.6 in)
75 mm (3 in)
Monthly rainy days
21 days
16 days
15 days
Weather conditions
less favorable
mixed
very good
Climate in Seaside →

Cannon Beach

In May Cannon Beach generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 7°C (45°F) and high monthly rainfall. So on average the conditions are mixed that month.

« April
May
June »
April
May
June
Max temperature
14°C (57°F)
16°C (61°F)
19°C (66°F)
Min temperature
5°C (41°F)
7°C (45°F)
10°C (50°F)
Monthly sun hours
222 hours
278 hours
291 hours
Monthly rainfall
187 mm (7.4 in)
123 mm (4.8 in)
82 mm (3.2 in)
Monthly rainy days
21 days
17 days
15 days
Weather conditions
less favorable
mixed
very good
Climate in Cannon Beach →

Depoe Bay

In May Depoe Bay generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 7°C (45°F) and moderate monthly rainfall. So on average the conditions are good that month.

« April
May
June »
April
May
June
Max temperature
14°C (57°F)
16°C (61°F)
17°C (63°F)
Min temperature
5°C (41°F)
7°C (45°F)
9°C (48°F)
Monthly rainfall
153 mm (6 in)
91 mm (3.6 in)
66 mm (2.6 in)
Monthly rainy days
21 days
15 days
12 days
Weather conditions
mixed
good
good
Climate in Depoe Bay →

Rockaway Beach

In May Rockaway Beach generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 7°C (45°F) and high monthly rainfall. So on average the conditions are mixed that month.

« April
May
June »
April
May
June
Max temperature
13°C (55°F)
17°C (63°F)
18°C (64°F)
Min temperature
4°C (39°F)
7°C (45°F)
9°C (48°F)
Monthly sun hours
222 hours
278 hours
291 hours
Monthly rainfall
221 mm (8.7 in)
131 mm (5.2 in)
86 mm (3.4 in)
Monthly rainy days
22 days
17 days
15 days
Weather conditions
less favorable
mixed
very good
Climate in Rockaway Beach →

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

Popular cities in May

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

City Weather Day temp Night temp Rainfall
Portland 20°C (68°F) 9°C (48°F) 71 mm (2.8 in)
Seaside 16°C (61°F) 7°C (45°F) 116 mm (4.6 in)
Cannon Beach 16°C (61°F) 7°C (45°F) 123 mm (4.8 in)
Depoe Bay 16°C (61°F) 7°C (45°F) 91 mm (3.6 in)
Rockaway Beach 17°C (63°F) 7°C (45°F) 131 mm (5.2 in)
Hillsboro 20°C (68°F) 8°C (46°F) 52 mm (2 in)

Oregon weather in May: frequently asked questions

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

Expect excellent weather across Oregon, the United States of America in May. The popular destination of Portland averages 20°C (68°F) by day and 9°C (48°F) at night during this month.

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

Portland averages a daytime maximum of 20°C (68°F) in May, with overnight lows close to 9°C (48°F).

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

Rain is generally moderate to light in Oregon, the United States of America during May, with Portland averaging close to 71 mm (2.8 in).

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

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

Generally speaking, the best visiting conditions can be found in May, June, July, August and September offering mostly excellent weather in Portland. The weather in January, March, November and December, on the other hand, tends to be less favorable.

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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