The best times to visit Willamette National Forest for ideal weather are

June 11th to September 23rd

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



Other Willamette National Forest Travel Info

Weather in Willamette National Forest


Average temperatures in Willamette National Forest vary drastically. Considering humidity, temperatures feel cold for most of the year with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 42nd 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 Willamette National Forest, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 90.7°F (32.6°C) with temperatures rarely dropping below 48°F (8.9°C) at night.

Willamette National Forest Temperatures (Fahrenheit)


Willamette National Forest Temperatures (Celsius)


“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.

Willamette National Forest Perceived Temperature (F)


Willamette National Forest Perceived Temperature (C)



Average Willamette National Forest 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 44.4 32.4 23.4
Feb 50 36.6 26.4
Mar 55.3 39.2 24.9
Apr 59.9 42.9 27.3
May 69.4 52.8 36.3
Jun 76.7 59.2 41
Jul 89.4 69.6 47.5
Aug 86.7 66.8 46.4
Sep 79.5 58.6 37.8
Oct 62.1 46.1 32.2
Nov 53.8 39.7 28.6
Dec 40.8 29.3 19

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 6.9 0.2 -4.8
Feb 10 2.6 -3.1
Mar 12.9 4 -3.9
Apr 15.5 6.1 -2.6
May 20.8 11.6 2.4
Jun 24.8 15.1 5
Jul 31.9 20.9 8.6
Aug 30.4 19.3 8
Sep 26.4 14.8 3.2
Oct 16.7 7.8 0.1
Nov 12.1 4.3 -1.9
Dec 4.9 -1.5 -7.2



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Willamette National Forest are July, September, and then February. 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 late January with an average of 1 days of significant precipitation the week of January 22nd.

When can you find snow in Willamette National Forest? 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 Willamette National Forest.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Willamette National Forest (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 7% 0 0.7
Feb 3% 0 0.3
Mar 3% 0 0.3
Apr 8% 0 0.6
May 6% 0 0.5
Jun 8% 0 0.7
Jul 1% 0 0.1
Aug 5% 0 0.9
Sep 2% 0 0.2
Oct 6% 0 0.8
Nov 6% 0 0.5
Dec 4% 0 0.4

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 7 0 1.8
Feb 3 0 0.8
Mar 3 0 0.8
Apr 8 0 1.5
May 6 0 1.3
Jun 8 0 1.8
Jul 1 0 0.3
Aug 5 0 2.3
Sep 2 0 0.5
Oct 6 0 2
Nov 6 0 1.3
Dec 4 0 1


Humidity and Wind

Willamette National Forest has some humid months, and dry months in the opposite season. The least humid month is July (24.8% relative humidity), and the most humid month is December (63.8%).

Wind in Willamette National Forest is usually calm. The windiest month is May, followed by June and April. May’s average wind speed of around 6.1 knots (7 MPH or 11.3 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late March where average top sustained speeds reach 18.6 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Willamette National Forest.

Avg. Relative Humidity


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

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 5.5 Light breeze 12.3 Significant breeze
Feb 4.8 Light breeze 11.9 Significant breeze
Mar 5.8 Light breeze 15.5 Significant breeze
Apr 6 Light breeze 15.2 Significant breeze
May 6.1 Light breeze 15.8 Significant breeze
Jun 6.1 Light breeze 16 Significant breeze
Jul 5.5 Light breeze 14.3 Significant breeze
Aug 5.5 Light breeze 14.9 Significant breeze
Sep 5 Light breeze 13.5 Significant breeze
Oct 4.6 Light breeze 11.7 Significant breeze
Nov 4.9 Light breeze 11.6 Significant breeze
Dec 5.2 Light breeze 12.1 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 62%
Feb 60.2%
Mar 47%
Apr 42.7%
May 39.9%
Jun 37.5%
Jul 24.8%
Aug 30.6%
Sep 30.1%
Oct 49.6%
Nov 57.1%
Dec 63.8%


Is it Safe to Travel to Willamette National Forest?

Our best data indicates this area is generally safe. As of Dec 04, 2023 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 Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Willamette National Forest, the United States is August, followed by July and June. 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 Willamette National Forest in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

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 extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 55.1 in December means 55.1% of the tourists vs. August.



Overall Willamette National Forest Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 78.6°F (25.9°C) and 51.6°F (10.9°C) with warmer temperatures in the later months. Rain is rare with 1 to 2 days of significant precipitation per month. Spring is the second 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 very comfortable weather with high temperatures that are quite warm. These months see the least precipitation with 0 to 2 days of precipitation per month. June – August is the busiest season for tourism in Willamette National Forest, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 85.3°F (29.6°C) and 47.5°F (8.6°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 1 to 2 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 far too cold this time of year in Willamette National Forest to be enjoyable for warm weather travelers. The average high during this season is between 52.1°F (11.2°C) and 38.9°F (3.8°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.


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