The best times to visit Grand Teton National Park for ideal weather are

June 18th 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 Grand Teton National Park Travel Info

Weather in Grand Teton National Park

Temperature

Average temperatures in Grand Teton National Park 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 17th 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 Grand Teton National Park, 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 81.3°F (27.4°C) with temperatures rarely dropping below 45.4°F (7.4°C) at night.

Grand Teton National Park Temperatures (Fahrenheit)

Key
High
Average
Low

Grand Teton National Park 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.

Grand Teton National Park Perceived Temperature (F)

Key
High
Average
Low

Grand Teton National Park Perceived Temperature (C)

Key
High
Average
Low

 

Average Grand Teton National Park 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 24.1 14.1 5.3
Feb 28.9 19.4 10.6
Mar 38.9 28.1 18.2
Apr 48.4 35.8 25
May 59.5 45.7 33
Jun 70.3 55.5 39.5
Jul 80.5 63.1 45
Aug 78.5 61.1 43.5
Sep 70.9 53 36.3
Oct 54.4 40.2 28.7
Nov 38.2 27.5 18.8
Dec 25.7 17 9.3

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -4.4 -9.9 -14.8
Feb -1.7 -7 -11.9
Mar 3.8 -2.2 -7.7
Apr 9.1 2.1 -3.9
May 15.3 7.6 0.6
Jun 21.3 13.1 4.2
Jul 26.9 17.3 7.2
Aug 25.8 16.2 6.4
Sep 21.6 11.7 2.4
Oct 12.4 4.6 -1.8
Nov 3.4 -2.5 -7.3
Dec -3.5 -8.3 -12.6

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Grand Teton National Park are September, August, and then July. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late June. For example, on the week of June 25th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early January with an average of 2 days of significant precipitation the week of January 1st.

When can you find snow in Grand Teton National Park? 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 Grand Teton National Park.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Grand Teton National Park (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 24% 0 2.6
Feb 21% 0 1.8
Mar 21% 0 2.3
Apr 21% 0 2
May 19% 0 2
Jun 13% 0 1.3
Jul 11% 0 1
Aug 10% 0 0.9
Sep 10% 0 1.3
Oct 15% 0 1.8
Nov 21% 0 2.2
Dec 26% 0 3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 24 0 6.6
Feb 21 0 4.6
Mar 21 0 5.8
Apr 21 0 5.1
May 19 0 5.1
Jun 13 0 3.3
Jul 11 0 2.5
Aug 10 0 2.3
Sep 10 0 3.3
Oct 15 0 4.6
Nov 21 0 5.6
Dec 26 0 7.6

 

Humidity and Wind

Grand Teton National Park has some very humid months, and slightly dry months in the opposite season. The least humid month is August (33.6% relative humidity), and the most humid month is January (72.1%).

Wind in Grand Teton National Park is usually calm. The windiest month is March, followed by February and April. March’s average wind speed of around 7 knots (8 MPH or 12.9 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 to mid June where average top sustained speeds reach 16.8 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Grand Teton National Park.

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.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 5.6 Light breeze 13.6 Significant breeze
Feb 7 Gentle breeze 15.2 Significant breeze
Mar 7 Gentle breeze 15.5 Significant breeze
Apr 7 Gentle breeze 16.1 Significant breeze
May 6.5 Light breeze 15.6 Significant breeze
Jun 6.3 Light breeze 16 Significant breeze
Jul 5.3 Light breeze 14.8 Significant breeze
Aug 5 Light breeze 13.9 Significant breeze
Sep 5.2 Light breeze 13.9 Significant breeze
Oct 5.3 Light breeze 13.4 Significant breeze
Nov 5.9 Light breeze 13.3 Significant breeze
Dec 6.1 Light breeze 13.5 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 72.1%
Feb 65.3%
Mar 58%
Apr 48.1%
May 42.8%
Jun 36.7%
Jul 33.7%
Aug 33.6%
Sep 36.9%
Oct 51.2%
Nov 61.8%
Dec 71.1%

 

Is it Safe to Travel to Grand Teton National Park?

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 Grand Teton National Park, WY, 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 Grand Teton National Park 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 36.5 in December means 36.5% of the tourists vs. July.

 

 

Overall Grand Teton National Park Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 64.3°F (17.9°C) and 30.4°F (-0.9°C) with warmer temperatures in the later months. Rain is somewhat common with roughly 6 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 3 to 4 days of precipitation per month. June – August is the busiest season for tourism in Grand Teton National Park, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 72.3°F (22.4°C) and 32.5°F (0.3°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 3 to 6 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 Grand Teton National Park to be enjoyable for warm weather travelers. The average high during this season is between 31.7°F (-0.2°C) and 21.1°F (-6.1°C). On average, it rains or snows a fair amount: 6 to 8 times per month. These times of year are the slowest with tourists.

 

Best Times to Travel› the United States › Grand Teton National Park, WY, US