The best times to visit Portland for ideal weather are

October 15th to April 22nd

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Portland Travel Info

Weather in Portland

Temperature

Average temperatures in Portland vary little. Considering humidity, temperatures feel nice most of the year, excluding some cold weeks in the winter, with a fair chance of precipitation about half of the year. The area is somewhat temperate — in the 56th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Portland, the hottest months are February, January, and then March. See average monthly temperatures below. The warmest time of year is generally early to mid February where highs are regularly around 73.6°F (23.1°C) with temperatures rarely dropping below 60.8°F (16°C) at night.

Portland Temperatures (Fahrenheit)

Key
High
Average
Low

Portland Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Portland Perceived Temperature (F)

Key
High
Average
Low

Portland Perceived Temperature (C)

Key
High
Average
Low

 

Average Portland Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 72 63.7 57.6
Feb 70.7 64 59.3
Mar 69.3 62.2 56.2
Apr 65.2 59.1 53.3
May 61.6 56.4 50.8
Jun 57.6 53.1 47.8
Jul 56.8 51.7 46.2
Aug 58.2 52.6 47
Sep 61.4 54.6 48.2
Oct 64.3 56.6 49.9
Nov 66.7 59.1 53.1
Dec 68.8 61.1 54.9

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 22.2 17.6 14.2
Feb 21.5 17.8 15.2
Mar 20.7 16.8 13.4
Apr 18.4 15.1 11.8
May 16.4 13.6 10.4
Jun 14.2 11.7 8.8
Jul 13.8 10.9 7.9
Aug 14.6 11.4 8.3
Sep 16.3 12.6 9
Oct 17.9 13.7 9.9
Nov 19.3 15.1 11.7
Dec 20.4 16.2 12.7

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Portland are February, January, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late February and early March. For example, on the week of February 26th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early August with an average of 3 days of significant precipitation the week of July 30th.

When can you find snow in Portland? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Portland.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Portland (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 9% 0 1.5
Feb 6% 0 0.8
Mar 13% 0 1.5
Apr 21% 0 2.2
May 27% 0 3.3
Jun 30% 0 3.7
Jul 36% 0 4.2
Aug 37% 0 4.1
Sep 27% 0 2.5
Oct 13% 0 1.5
Nov 10% 0 1.6
Dec 13% 0 1.7

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 9 0 3.8
Feb 6 0 2
Mar 13 0 3.8
Apr 21 0 5.6
May 27 0 8.4
Jun 30 0 9.4
Jul 36 0 10.7
Aug 37 0 10.4
Sep 27 0 6.4
Oct 13 0 3.8
Nov 10 0 4.1
Dec 13 0 4.3

 

Humidity and Wind

Portland has some very humid months, and above average humidity throughout the year. The least humid month is October (66.3% relative humidity), and the most humid month is June (75.1%).

Wind in Portland is usually stronger than many places. The windiest month is August, followed by September and October. August’s average wind speed of around 13.3 knots (15.3 MPH or 24.6 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early August where average top sustained speeds reach 19.7 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Portland.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 11.5 Significant breeze 16 Significant breeze
Feb 12 Significant breeze 16.3 Significant breeze
Mar 10.9 Gentle breeze 15.7 Significant breeze
Apr 10.6 Gentle breeze 15.1 Significant breeze
May 11.3 Significant breeze 15.8 Significant breeze
Jun 12.1 Significant breeze 17 Strong breeze
Jul 12.3 Significant breeze 17.2 Significant breeze
Aug 13.3 Significant breeze 18.6 Strong breeze
Sep 12.4 Significant breeze 18 Significant breeze
Oct 12.3 Significant breeze 17.6 Strong breeze
Nov 11.8 Significant breeze 16.6 Significant breeze
Dec 11.6 Significant breeze 16.6 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 67%
Feb 71.3%
Mar 69.8%
Apr 72.3%
May 73.1%
Jun 75.1%
Jul 74.9%
Aug 73%
Sep 67.6%
Oct 66.3%
Nov 70.2%
Dec 69.9%

 

Is it Safe to Travel to Portland?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Australia; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Aug 22, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Portland, VC, Australia is February, followed by June and December. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Portland in July. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 32.1 in July means 32.1% of the tourists vs. February.

 

 

Overall Portland Travel Experience by Season

Fall (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 71.7°F (22.1°C) and 59.7°F (15.4°C) with colder temperatures in the later months. Rain is somewhat common with 4 to 8 days of significant precipitation per month. Fall is the slowest for tourism, which makes it a good time for those looking for deals.

Winter (June through August)

The middle-year months have cold weather with high temperatures that are brisk. These months see the most precipitation with 9 to 11 days of precipitation per month. June – August is the second busiest season for tourism in Portland, so lodging and other accommodations may cost slightly more.

Spring (September through November)

Spring daily highs range from 69.6°F (20.9°C) and 60.3°F (15.7°C), which will feel comfortable given the humidity and wind. It rains or snows a significant amount: 3 to 8 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Summer (December through February)

Weather is somewhat cool this time of year in Portland to be enjoyable for warm weather travelers. The average high during this season is between 73.6°F (23.1°C) and 67.3°F (19.6°C). On average, it rains or snows a smalll amount: 2 to 4 times per month. These times of year are the busiest with tourists.

 

Best Times to TravelAustralia › Portland, VC, Australia