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

May 14th to September 30th

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


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Other Siuslaw National Forest Travel Info

Weather in Siuslaw National Forest

Temperature

Average temperatures in Siuslaw National Forest vary greatly. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 30th 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 Siuslaw National Forest, the hottest months are July, August, and then September. See average monthly temperatures below. The warmest time of year is generally mid August where highs are regularly around 88.5°F (31.4°C) with temperatures rarely dropping below 55.5°F (13.1°C) at night.

Siuslaw National Forest Temperatures (Fahrenheit)

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High
Average
Low

Siuslaw National Forest Temperatures (Celsius)

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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.

Siuslaw National Forest Perceived Temperature (F)

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High
Average
Low

Siuslaw National Forest Perceived Temperature (C)

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High
Average
Low

 

Average Siuslaw 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

MonthAvg. High (°F)Avg. Mean (°F)Avg. Low (°F)
Jan48.740.635.7
Feb53.243.236.9
Mar58.747.139.5
Apr63.75040.7
May71.856.746.1
Jun77.261.750.2
Jul85.868.154.4
Aug85.667.954.4
Sep8062.549
Oct67.653.844.2
Nov54.145.339.2
Dec47.740.735.9

Show Celsius

MonthAvg. High (°C)Avg. Mean (°C)Avg. Low (°C)
Jan9.34.82.1
Feb11.86.22.7
Mar14.88.44.2
Apr17.6104.8
May22.113.77.8
Jun25.116.510.1
Jul29.920.112.4
Aug29.819.912.4
Sep26.716.99.4
Oct19.812.16.8
Nov12.37.44
Dec8.74.82.2


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Siuslaw National Forest are July, August, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early July. For example, on the week of July 2nd there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid December with an average of 4 days of significant precipitation the week of December 17th.

When can you find snow in Siuslaw 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 Siuslaw National Forest.

Key
Days with precipitation

Snow on the Ground

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

Key
Snow depth

Average Rain and Snow by Month

Show Inches

MonthDaily Chance of RainAverage Snow Depth (in)Total Precipitation (in)
Jan26%04.4
Feb34%04.2
Mar33%05
Apr26%02.4
May15%01.6
Jun11%00.9
Jul3%00.3
Aug3%00.3
Sep9%01.4
Oct23%02.9
Nov39%05.2
Dec41%08

Show Centimeters

MonthDaily Chance of RainAverage Snow Depth (cm)Total Precipitation (cm)
Jan26011.2
Feb34010.7
Mar33012.7
Apr2606.1
May1504.1
Jun1102.3
Jul300.8
Aug300.8
Sep903.6
Oct2307.4
Nov39013.2
Dec41020.3

 

Humidity and Wind

Siuslaw National Forest has some extremely humid months, with other moderately humid months on the other side of the year. The least humid month is July (47.7% relative humidity), and the most humid month is December (81.6%).

Wind in Siuslaw National Forest is usually calm. The windiest month is July, followed by August and June. July’s average wind speed of around 7.5 knots (8.7 MPH or 14 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 early August where average top sustained speeds reach 15.7 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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.

MonthAvg. WindAvg. Wind FeelSustained High WindHigh Wind Feel
Jan3.9Barely noticeable10.6Gentle breeze
Feb4.6Light breeze11.7Significant breeze
Mar5.6Light breeze13.4Gentle breeze
Apr5.4Light breeze13.3Significant breeze
May5.6Light breeze13.4Gentle breeze
Jun5.9Light breeze13.4Significant breeze
Jul7.5Gentle breeze15.1Gentle breeze
Aug6.7Light breeze15Significant breeze
Sep5.6Light breeze13.7Gentle breeze
Oct4.5Light breeze11.6Significant breeze
Nov4.6Light breeze11.6Gentle breeze
Dec4.8Light breeze12Significant breeze

Show Relative Humidity by Month

MonthAvg. Relative Humidity
Jan80%
Feb74.9%
Mar69.6%
Apr63.4%
May57.4%
Jun55%
Jul47.7%
Aug49.7%
Sep54.9%
Oct68.1%
Nov78%
Dec81.6%

 

Is it Safe to Travel to Siuslaw National Forest?

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 Siuslaw 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 Siuslaw 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

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 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 Siuslaw National Forest Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 75.7°F (24.3°C) and 54.7°F (12.6°C) with warmer temperatures in the later months. Rain is somewhat common with 5 to 10 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 comfortable. These months see the least precipitation with 1 to 3 days of precipitation per month. June – August is the busiest season for tourism in Siuslaw National Forest, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 84.8°F (29.3°C) and 50.2°F (10.1°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 3 to 12 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 too cold this time of year in Siuslaw National Forest to be enjoyable for warm weather travelers. The average high during this season is between 55.3°F (12.9°C) and 46.3°F (7.9°C). On average, it rains or snows a great amount: 8 to 13 times per month. These times of year are fairly slow with tourists.

 

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