The best times to visit Hermiston for ideal weather are

April 30th to October 7th

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

 

 


Other Hermiston Travel Info

Weather in Hermiston

Temperature

Average temperatures in Hermiston vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 43rd 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 Hermiston, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 95.8°F (35.4°C) with temperatures rarely dropping below 57.9°F (14.4°C) at night.

Hermiston Temperatures (Fahrenheit)

Key
High
Average
Low

Hermiston 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.

Hermiston Perceived Temperature (F)

Key
High
Average
Low

Hermiston Perceived Temperature (C)

Key
High
Average
Low

 

Average Hermiston 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)
Jan42.934.427.3
Feb50.138.729.2
Mar59.845.632.8
Apr6651.136.9
May76.660.244.4
Jun83.667.651.9
Jul94.276.157.5
Aug9273.956
Sep82.564.247.2
Oct66.95239.1
Nov51.140.430.8
Dec41.833.225.4

Show Celsius

MonthAvg. High (°C)Avg. Mean (°C)Avg. Low (°C)
Jan6.11.3-2.6
Feb10.13.7-1.6
Mar15.47.60.4
Apr18.910.62.7
May24.815.76.9
Jun28.719.811.1
Jul34.624.514.2
Aug33.323.313.3
Sep28.117.98.4
Oct19.411.13.9
Nov10.64.7-0.7
Dec5.40.7-3.7

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Hermiston 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 late March with an average of 1 days of significant precipitation the week of March 26th.

When can you find snow in Hermiston? 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 Hermiston.

Key
Days with precipitation

Snow on the Ground

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

Key
Snow depth

Average Rain and Snow by Month

Show Inches

MonthDaily Chance of RainAverage Snow Depth (in)Total Precipitation (in)
Jan11%00.9
Feb9%00.6
Mar10%00.9
Apr9%00.7
May10%00.9
Jun10%00.8
Jul1%00.1
Aug2%00.2
Sep4%00.4
Oct10%00.9
Nov10%00.9
Dec14%01.2

Show Centimeters

MonthDaily Chance of RainAverage Snow Depth (cm)Total Precipitation (cm)
Jan1102.3
Feb901.5
Mar1002.3
Apr901.8
May1002.3
Jun1002
Jul100.3
Aug200.5
Sep401
Oct1002.3
Nov1002.3
Dec1403

 

Humidity and Wind

Hermiston has some very humid months, and dry months in the opposite season. The least humid month is July (26.4% relative humidity), and the most humid month is December (73.3%).

Wind in Hermiston is usually calm. The windiest month is April, followed by June and May. April’s average wind speed of around 7.8 knots (9 MPH or 14.5 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 April where average top sustained speeds reach 16.4 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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
Jan4.7Light breeze10.8Gentle breeze
Feb5.4Light breeze12.1Significant breeze
Mar6.7Light breeze14.6Gentle breeze
Apr7.8Gentle breeze15.7Significant breeze
May7.1Gentle breeze14Gentle breeze
Jun7.7Gentle breeze14.4Significant breeze
Jul6.5Light breeze12.6Gentle breeze
Aug6.3Light breeze12.4Significant breeze
Sep5.2Light breeze11.1Gentle breeze
Oct4.6Light breeze10.5Gentle breeze
Nov4.9Light breeze11.2Gentle breeze
Dec4.5Light breeze10.9Gentle breeze

Show Relative Humidity by Month

MonthAvg. Relative Humidity
Jan72.2%
Feb66.3%
Mar52.2%
Apr42.3%
May38.3%
Jun35.3%
Jul26.4%
Aug29.8%
Sep38.3%
Oct55.7%
Nov68.4%
Dec73.3%

 

Is it Safe to Travel to Hermiston?

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 Hermiston, OR, US is July, followed by August and May. 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 Hermiston in September. 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 36.1 in September means 36.1% of the tourists vs. July.

 

 

Overall Hermiston Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 81.6°F (27.6°C) and 53.5°F (11.9°C) with warmer temperatures in the later months. Rain is rare with roughly 3 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 3 days of precipitation per month. June – August is the busiest season for tourism in Hermiston, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 86.2°F (30.1°C) and 42.8°F (6°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 1 to 3 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 Hermiston to be enjoyable for warm weather travelers. The average high during this season is between 54.5°F (12.5°C) and 39.9°F (4.4°C). On average, it rains or snows a smalll amount: 2 to 4 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travelthe United States › Hermiston, OR, US