What is the average Yellowstone September temperature.

Answer by  EchoC (553)

The average high at Yellowstone in September is around 66 degrees, with the average low being about 30. The weather at Yellowstone is often unpredictable, prepare for this when camping.

Answer by  jshdvrs (28)

Starting in September, temperatures average 10 to 20 degrees lower than summer readings, with highs in the 40s to 60s. This is almost always the case for this time of year for it is trending towards winter weather at this point in the year. if your looking for hot weather you should probably go earlier in the year.

Answer by  bobomonkey72 (19)

In September, Yellowstone National Park sees an average daytime high of 67.8 degrees, with overnight lows dipping to around 37 degrees. Remember, however, even on the sunniest day, the temperature may drop suddenly due to storm activity, so be prepared with appropriate clothing.

Answer by  daddyo (34)

During September, the average high temperature at Yellowstone is 67.8 degrees, and the average low is 37.0 degrees. Overall average is 52.

Answer by  biw (79)

In Fahrenheit temperatures it is a high of 60 degrees, a low of 33 degrees and a mean of 48 degrees.

Answer by  ShawnL19 (310)

The 48 year average temperature for September is a high of 67. 8 degrees Fahrenheit and a low of 37 degrees Fahrenheit. Be warned though, do to it's high altitude, weather is unpredictable and can change very quickly. To be safe, go prepared for the possibility of freezing temps and snow.

Answer by  lmac (355)

In September, the highs in Yellowstone average in the 40s to 60s (degrees F) during the day. During the night, lows are typically in the 0s to 10s. Be prepared for both rain storms and frequent snow. Of course, weather is unpredictable, so perhaps you should be prepared for anything!

Answer by  MarsdenCross (5)

With fewer visitors, camping Yellowstone in the fall can be a great experience. The temperature averages between 30 and 60 degrees, but can swing dramatically.

Answer by  Gabriel (2146)

According to the National Forest Service, the average high is 67. 8 degrees during September, and the average low is 37.0. They also expect just over an inch of precipitation and a half inch of snow, so be prepared.