The best times to visit Central Idaho 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 Central Idaho Travel Info

Weather in Central Idaho


Average temperatures in Central Idaho vary drastically. Considering humidity, temperatures feel cold for most of the year with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 18th 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 Central Idaho, the hottest months are July, August, and then September. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 83.8°F (28.8°C) with temperatures rarely dropping below 47.3°F (8.5°C) at night.

Central Idaho Temperatures (Fahrenheit)


Central 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.

Central Idaho Perceived Temperature (F)


Central Idaho Perceived Temperature (C)



Average Central 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 29.4 20.3 11.9
Feb 33.4 23.4 14.2
Mar 39.3 28.8 19.6
Apr 47.7 35 24.6
May 59.2 45.4 33.1
Jun 67.9 53.5 39.7
Jul 81.9 64.6 46
Aug 80.8 62.5 44.3
Sep 73.3 54.3 37.2
Oct 55 40.6 29.8
Nov 40.4 30.1 21.8
Dec 29.4 21.6 13.9

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -1.4 -6.5 -11.2
Feb 0.8 -4.8 -9.9
Mar 4.1 -1.8 -6.9
Apr 8.7 1.7 -4.1
May 15.1 7.4 0.6
Jun 19.9 11.9 4.3
Jul 27.7 18.1 7.8
Aug 27.1 16.9 6.8
Sep 22.9 12.4 2.9
Oct 12.8 4.8 -1.2
Nov 4.7 -1.1 -5.7
Dec -1.4 -5.8 -10.1



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Central Idaho 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 mid July. For example, on the week of July 16th 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 3 days of significant precipitation the week of March 26th.

When can you find snow in Central 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 Central Idaho.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Central 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 23% 0 2.3
Feb 23% 0 1.9
Mar 30% 0 3.3
Apr 21% 0 2
May 19% 0 1.9
Jun 16% 0 2.1
Jul 5% 0 0.5
Aug 6% 0 0.6
Sep 9% 0 1.2
Oct 17% 0 1.8
Nov 25% 0 2.5
Dec 29% 0 3.5

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 23 0 5.8
Feb 23 0 4.8
Mar 30 0 8.4
Apr 21 0 5.1
May 19 0 4.8
Jun 16 0 5.3
Jul 5 0 1.3
Aug 6 0 1.5
Sep 9 0 3
Oct 17 0 4.6
Nov 25 0 6.4
Dec 29 0 8.9


Humidity and Wind

Central Idaho has some very humid months, and slightly dry months in the opposite season. The least humid month is August (33.5% relative humidity), and the most humid month is December (76.2%).

Wind in Central Idaho is usually extremely calm. The windiest month is May, followed by June and April. May’s average wind speed of around 4.5 knots (5.1 MPH or 8.3 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 early June where average top sustained speeds reach 13.3 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Central 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 2.5 Barely noticeable 8.2 Gentle breeze
Feb 2.8 Barely noticeable 8.8 Gentle breeze
Mar 3.8 Barely noticeable 11.2 Gentle breeze
Apr 3.9 Barely noticeable 11.7 Significant breeze
May 4.5 Light breeze 12.3 Gentle breeze
Jun 4 Light breeze 11.9 Significant breeze
Jul 3.7 Barely noticeable 11.4 Gentle breeze
Aug 3.6 Barely noticeable 11.5 Significant breeze
Sep 3.1 Barely noticeable 10.6 Gentle breeze
Oct 3 Barely noticeable 9.9 Gentle breeze
Nov 2.7 Barely noticeable 9.3 Gentle breeze
Dec 3 Barely noticeable 9.2 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 76.1%
Feb 72.8%
Mar 68.2%
Apr 57.9%
May 51.6%
Jun 50.5%
Jul 35.1%
Aug 33.5%
Sep 37%
Oct 58.5%
Nov 72.4%
Dec 76.2%


Is it Safe to Travel to Central Idaho?

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 Central Idaho, the United States 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 Central Idaho 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

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 Central Idaho Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 67.4°F (19.7°C) and 34.3°F (1.3°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 9 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 comfortably cool weather with high temperatures that are comfortable. These months see the least precipitation with 2 to 5 days of precipitation per month. June – August is the busiest season for tourism in Central Idaho, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 76.6°F (24.8°C) and 34.5°F (1.4°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 3 to 7 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 Central Idaho to be enjoyable for warm weather travelers. The average high during this season is between 35.4°F (1.9°C) and 27.1°F (-2.7°C). On average, it rains or snows a fair amount: 6 to 9 times per month. These times of year are fairly slow with tourists.


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