I have reservations for Sept 15 - 24 in Yellowstone at Fishing Bridge and Madison campgrounds. Does anyone have any personal experience with the weather at that time of the year in these locations. The cool temperatures are not a big concern, but I don't want to see any snow.I know at this time, the tourists will be gone and the wildlife active, so looking forward to a great trip.Also, headed to Gros Ventre in the Grand Tetons after I leave Yellowstone, so any suggested routes would be appreciated as would any comments on my schedule.

Could be warm, with a chance of snow. Temperatures will vary from freezing to the mid 70s.Good time to go. Elk should be passing through Madison campground bugling all the way in the evenings. Bears could be passing through Fishing Bridge.Trees will be changing.

Best time to go. But be prepare for snow. I would say about a 10% chance.Stop at Gross Ventre at Grand Tetons and see the moose but NOT this close Note the date on the photo

If you don't want to see snow, don't go to Yellowstone. I have seen it snow every month of the year there, honestly. It's higher and further north then you are used to.But late Sept, odds are it might snow, but the snow will be melted off the roads by noonish, If it's an unseasonable storm the Park Service will actually plow the roads.Personally I prefer the early spring, as the game is largely still down in the valleys. But Sept is a good time, being the Fall some of the big-game will be more aggressive then earlier so make certain you give them space.

TenOC wrote:Best time to go. But be prepare for snow. I would say about a 10% chance.Stop at Gross Ventre at Grand Tetons and see the moose but NOT this close Note the date on the photoDo not get this close to these animals. Yellowstone is not a zoo. These animals can be very dangerous. One or two people a year are killed because they think these animals are tame. JMHO.

We were at YNP a couple of years ago from 16 to 23 Sep - the weather was fantastic! We even managed not to get snowed upon. Overnight lows were in the 20's, but it warmed very nicely into the 60's with bright blue skies every day.Here's our report and pix on our visit.Have a great trip!Ted H.

Weather in Yellowstone NP in Late September | Good Sam Community

14 Replies

armadillo_17
Explorer
Jun 16, 2014
2009 closed Fishing bridge Sept 30 , Moved over to Madison..Great time. Temps okay...Wildlife abundant....

Read in the news that it snowed the next week.
Busskipper
Explorer
Jun 14, 2014
2gypsies wrote:
We've been there a few times mid-late September with no snow. However, you just can't rely on it. If it does, it probably won't last until noon or so as the daytime temps are still pleasant. It will be cold at night so bring extra blankets, coat, gloves and hat. :) It's a wonderful time to be there. Have fun!

Sum's it up

BOL,
hermy
Explorer
Jun 14, 2014
We go the third week of Sept almost every year. Usually the weather is great- 30s at night and 60 or 70 during the day. But things can change drastically so be prepared for worse weather. Have appropriate clothing and have your propane tanks full. Stay informed about the local weather and pay attention to what you see developing. We have definitely seen snow that time of year.
Twomed
Explorer
Jun 14, 2014
35 degrees this morning in West Yellowstone but mid 70's by noon. :) :)
Jim_Shoe
Explorer
Jun 14, 2014
Here's the averages by month for the last 107 years. Based on the data during those months, I'd take shorts and a parka. :)
2gypsies1
Explorer III
Jun 13, 2014
We've been there a few times mid-late September with no snow. However, you just can't rely on it. If it does, it probably won't last until noon or so as the daytime temps are still pleasant. It will be cold at night so bring extra blankets, coat, gloves and hat. :) It's a wonderful time to be there. Have fun!
profdant139
Explorer II
Jun 13, 2014
We spent ten days in YNP in mid-October a few years ago -- no snow, but quite chilly -- so cool that a lot of steam was coming from Mammoth Hot Springs:

I would not hesitate to go -- no bugs, fewer crowds, fall colors. Just keep an eye on the weather.
frmAloha
Explorer
Jun 13, 2014
We were there in September two years ago, and the weather was fantastic. Cold enough at night in Fishing Bridge that we had to unhook the water supply, but warmed up to shirt sleeve weather during the day. Chances are you'll be fine. Have fun!
Two_Hands
Explorer
Jun 13, 2014
You can go to weather.com and get average daily highs and lows for the time during which you plan to visit. Have a great trip.
wxtoad
Explorer
Jun 13, 2014
We were at YNP a couple of years ago from 16 to 23 Sep - the weather was fantastic! We even managed not to get snowed upon. Overnight lows were in the 20's, but it warmed very nicely into the 60's with bright blue skies every day.

Here's our report and pix on our visit.

Have a great trip!

Ted H.