The best times to visit Eastern Idaho for ideal weather are

June 11th 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.



Other Eastern Idaho Travel Info

Weather in Eastern Idaho


Average temperatures in Eastern Idaho 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 less temperate than some — in the 38th 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 Eastern Idaho, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 88°F (31.1°C) with temperatures rarely dropping below 51.8°F (11°C) at night.

Eastern Idaho Temperatures (Fahrenheit)


Eastern Idaho 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.

Eastern Idaho Perceived Temperature (F)


Eastern Idaho Perceived Temperature (C)



Average Eastern Idaho 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 28 18.6 10.4
Feb 33.8 24.4 15.9
Mar 46.5 34.8 24.9
Apr 57.2 43 30.5
May 67.2 52.2 38.5
Jun 77.2 61.1 45.7
Jul 87.1 69.4 51.8
Aug 85.8 67 49.8
Sep 77 58.5 42.2
Oct 59.9 45.1 33.2
Nov 43.5 31.9 23.1
Dec 30.3 21.8 14.2

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -2.2 -7.4 -12
Feb 1 -4.2 -8.9
Mar 8.1 1.6 -3.9
Apr 14 6.1 -0.8
May 19.6 11.2 3.6
Jun 25.1 16.2 7.6
Jul 30.6 20.8 11
Aug 29.9 19.4 9.9
Sep 25 14.7 5.7
Oct 15.5 7.3 0.7
Nov 6.4 -0.1 -4.9
Dec -0.9 -5.7 -9.9



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Eastern Idaho are July, August, 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 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 May with an average of 2 days of significant precipitation the week of May 21st.

When can you find snow in Eastern Idaho? 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 Eastern Idaho.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 10% 0 1
Feb 10% 0 0.7
Mar 11% 0 0.9
Apr 14% 0 1.3
May 16% 0 1.5
Jun 12% 0 1.2
Jul 5% 0 0.6
Aug 9% 0 1
Sep 10% 0 0.8
Oct 13% 0 1.2
Nov 10% 0 0.9
Dec 13% 0 1.2

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 10 0 2.5
Feb 10 0 1.8
Mar 11 0 2.3
Apr 14 0 3.3
May 16 0 3.8
Jun 12 0 3
Jul 5 0 1.5
Aug 9 0 2.5
Sep 10 0 2
Oct 13 0 3
Nov 10 0 2.3
Dec 13 0 3


Humidity and Wind

Eastern Idaho has some very humid months, and slightly dry months in the opposite season. The least humid month is August (33.4% relative humidity), and the most humid month is January (74.8%).

Wind in Eastern Idaho is usually calm. The windiest month is April, followed by May and June. 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 late March where average top sustained speeds reach 17.9 knots, which is considered a fresh breeze.

Relative Humidity (%)

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

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 4.1 Light breeze 9.5 Gentle breeze
Feb 5.1 Light breeze 11.1 Significant breeze
Mar 6.9 Light breeze 14.3 Gentle breeze
Apr 7.8 Gentle breeze 16.6 Significant breeze
May 7 Gentle breeze 15.3 Gentle breeze
Jun 6.9 Light breeze 15 Significant breeze
Jul 5.6 Light breeze 12.9 Gentle breeze
Aug 5.5 Light breeze 13.3 Significant breeze
Sep 5.4 Light breeze 12.6 Gentle breeze
Oct 5.3 Light breeze 12 Significant breeze
Nov 5.8 Light breeze 12.1 Gentle breeze
Dec 5.1 Light breeze 11.3 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 74.8%
Feb 69%
Mar 55.1%
Apr 41.2%
May 39.3%
Jun 38.5%
Jul 34.4%
Aug 33.4%
Sep 36.1%
Oct 50.2%
Nov 62%
Dec 72.4%


Is it Safe to Travel to Eastern Idaho?

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 Eastern Idaho, ID, US is July, followed by June and August. 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 Eastern Idaho 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 36.5 in December means 36.5% of the tourists vs. July.



Overall Eastern Idaho Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 72°F (22.2°C) and 36.1°F (2.3°C) with warmer temperatures in the later months. Rain is somewhat common with 3 to 5 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 2 to 4 days of precipitation per month. June – August is the busiest season for tourism in Eastern Idaho, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 78.6°F (25.9°C) and 37.8°F (3.2°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 3 to 4 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is far too cold this time of year in Eastern Idaho to be enjoyable for warm weather travelers. The average high during this season is between 36.1°F (2.3°C) and 25.8°F (-3.4°C). On average, it rains or snows a smalll amount: 3 to 4 times per month. These times of year are the slowest with tourists.


Best Times to Travelthe United States › Eastern Idaho, ID, US