The best times to visit Portland for ideal weather are
October 29th 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.
Portland Travel Guide
Other Portland Travel Info
Weather in Portland
Average temperatures in Portland vary greatly. Considering humidity, temperatures feel hot for about half of the year and otherwise nice with a very low chance of precipitation throughout the year. The area is more temperate than most — in the 63rd 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 August, July, and then June. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 94.4°F (34.7°C) with temperatures rarely dropping below 79.7°F (26.5°C) at night.
Portland Temperatures (Fahrenheit)
Portland Temperatures (Celsius)
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)
Portland Perceived Temperature (C)
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.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Portland are April, August, and then October. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid January. For example, on the week of January 8th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid to late September with an average of 1 days of significant precipitation the week of September 17th.
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.
Snow on the Ground
The graph below shows the average snow on the ground in Portland (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Portland has some humid months, and above average humidity throughout the year. The least humid month is October (62.6% relative humidity), and the most humid month is February (69%).
Wind in Portland is usually moderate. The windiest month is April, followed by May and March. April’s average wind speed of around 10.9 knots (12.6 MPH or 20.2 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late April where average top sustained speeds reach 20.2 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Portland.
The graph below shows wind speed (max and average) in knots.
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||8.4||Gentle breeze||15.9||Significant breeze|
|Feb||9.2||Gentle breeze||17.4||Strong breeze|
|Mar||9.9||Gentle breeze||17.8||Significant breeze|
|Apr||10.9||Gentle breeze||19.4||Strong breeze|
|May||10.8||Gentle breeze||18.1||Significant breeze|
|Jun||9.9||Gentle breeze||17.2||Strong breeze|
|Jul||9.2||Gentle breeze||16.8||Significant breeze|
|Aug||8.2||Gentle breeze||15.9||Significant breeze|
|Sep||7.3||Gentle breeze||14.7||Significant breeze|
|Oct||7.7||Gentle breeze||15||Significant breeze|
|Nov||7.8||Gentle breeze||15.2||Significant breeze|
|Dec||8.2||Gentle breeze||15.2||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
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 the United States; 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 Sep 23, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Portland, TX, US is March, followed by June and April. 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 November. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Portland Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 90.3°F (32.4°C) and 71.1°F (21.7°C) with warmer temperatures in the later months. Rain is extremely rare with 0 to 1 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have hot weather with high temperatures that are quite warm. These months see moderate precipitation with 0 to 1 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.
Fall (September through November)
Fall daily highs range from 92.7°F (33.7°C) and 72°F (22.2°C), which will feel very nice given the humidity and wind. It rains or snows a normal amount: approximately 1 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (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 73.1°F (22.8°C) and 64.7°F (18.2°C). On average, it rains or snows a smalll amount: 1 to 2 times per month. These times of year are fairly slow with tourists.