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.
Grand Teton National Park Travel Guide
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)
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Grand Teton National Park Temperatures (Celsius)
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“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)
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Grand Teton National Park Perceived Temperature (C)
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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) |
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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) |
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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.
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Snow on the Ground
The graph below shows the average snow on the ground in Grand Teton National Park (in).
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Average Rain and Snow by Month
Show Inches
Month | Daily Chance of Rain | Average Snow Depth (in) | Total Precipitation (in) |
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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.
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Wind
The graph below shows wind speed (max and average) in knots.
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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 |
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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
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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