Grand Teton National Park (Wyoming) in september: average Weather, Temperature and Climate
Weather in Grand Teton National Park (Wyoming) in september 2025
The weather in Grand Teton National Park (Wyoming) in september comes from statistical datas on the last years. You can view the weather statistics for all the month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
very bad weather 67cm
Weather at 6am
43°F
Clear/Sunny
58% of time
17%
14%
4%
Weather at 12pm
58°F
Clear/Sunny
65% of time
13%
9%
9%
Weather at 6pm
56°F
Clear/Sunny
60% of time
14%
9%
9%
Weather at 3am
45°F
61%
17%
13%
4%
Evolution of daily average temperature and precipitation in Grand Teton National Park (Wyoming) in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Grand Teton National Park (Wyoming) in september.
The climate of Grand Teton National Park (Wyoming) in september is very bad
the weather in Grand Teton National Park (Wyoming) in september is quite dry (with 3.9in of precipitation over 7 days). The weather's not getting better compared to the previous month since in august there is an average of 3.6in of rainfall over 6 days.
The climate is quite cool in that area this month, but it is livable when dressing hot. The thermometer averaged maximum of 59°F. In the morning the temperature drops to 41°F. Thus, the mean temperature average in september in Grand Teton National Park (Wyoming) is 50°F. Note that these seasonal averages are in contrast with those observed in Grand Teton National Park (Wyoming) in september with a maximum record of 77°F in 2013 and a minimum record of 22°F in 2020. You need to prepare to have about 4 days with temperatures under 32°F, or 13% of the month.
On average, in Grand Teton National Park (Wyoming), the days of september last 12:30. The sun rises at 06:03 and sunset is at 18:33.
September: another location in the United States (USA)?
If you want to go to the United States (USA) in september, there are destinations with better weather than Grand Teton National Park (Wyoming):
In september, Grand Canyon, Hawaii (Honolulu), Las Vegas, Seattle, Denver and Minneapolis (Minnesota) have perfect weather.
Furthermore, California, Louisiana, Washington D. C., Atlanta, Boston and Chicago have good weather.
Finally, Miami (Florida), Cody (Wyoming), Crater Lake (Oregon) , Dauphin Island (Alabama), Helena (Montana) and Montana have a tolerable climate, but better than Grand Teton National Park (Wyoming).
Seasonal average climate and temperature of Grand Teton National Park (Wyoming) in september
Check below seasonal norms These statistics are compiled from the weather statements earlier years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 50°F | ||||
| Highest temperature | 59°F | ||||
| Lowest temperature | 41°F | ||||
| Highest record temperature | 77°F (2013) | ||||
| Lowest record temperature | 22°F (2020) | ||||
| Number of days at +65°F | 10 day(s) (33%) | ||||
| Number of days at -32°F | 4 day(s) (13%) | ||||
| Wind | |||||
| Wind speed | 16km/h | ||||
| Wind temperature | 40°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.9in | ||||
| Number of days with rainfall | 7 day(s) (22%) | ||||
| Record daily rainfall | 2in (2017) | ||||
| Snowfall | 67cm | ||||
| Other climate data | |||||
| Humidity | 72% | ||||
| Visibility | 9.51km | ||||
| Cloud cover | 19% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:03 | ||||
| Time of sunset | 18:33 | ||||
| Length of day | 12:30 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | very bad | ||||
How was the weather last september?
Here is the day by day recorded weather in Grand Teton National Park (Wyoming) in september 2024:
45°F to 83°F
45°F to 77°F
45°F to 70°F
38°F to 70°F
38°F to 76°F
41°F to 79°F
45°F to 79°F
43°F to 79°F
43°F to 74°F
41°F to 76°F
43°F to 72°F
38°F to 41°F
34°F to 54°F
34°F to 67°F
36°F to 67°F
41°F to 70°F
45°F to 56°F
38°F to 43°F
43°F to 59°F
40°F to 63°F
40°F to 63°F
38°F to 61°F
41°F to 59°F
41°F to 68°F
45°F to 72°F
47°F to 68°F
45°F to 70°F
43°F to 74°F
47°F to 72°F
38°F to 54°F
Map: other cities in the United States (USA) in september
Cities near Grand Teton National Park (Wyoming):
| Jackson Hole in september | very bad weather |
| Yellowstone National Park in september | very bad weather |
| Cody (Wyoming) in september | tolerable weather |
| Wyoming in september | good weather |
| Helena (Montana) in september | tolerable weather |
| Salt Lake City in september | good weather |
| Montana in september | tolerable weather |
| Boise (Idaho) in september | perfect weather |
| Utah in september | perfect weather |
| Arches National Park (Utah) in september | perfect weather |
| Moab in september | perfect weather |
| Mount Rushmore in september | good weather |
Click over cities on the map for information about the weather in september.
Grand Teton National Park (Wyoming)
perfect weather
good
tolerable
bad
very bad
Weather data for Grand Teton National Park (Wyoming) in september:
Weather data for Grand Teton National Park (Wyoming) for september are derived from an average of the weather forecast since 2009 in Grand Teton National Park (Wyoming). There is a margin of error and these forecasts are to be considered as general information only. The weather in Grand Teton National Park (Wyoming) can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Grand Teton National Park (Wyoming).