Yellowstone Park Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in Yellowstone Park, Wyoming during each month of the year.

The average high and low temperatures at the Park near Old Faithful are listed below in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 60, 70 or 80 °F each month in Yellowstone Park, scroll down farther. There are also monthly and yearly counts of days with cold weather.

All the numbers are long-term historical averages based on climate data gathered from 1981 to 2010.

Average Yellowstone Park temperatures
High °F Low °F   High °C Low °C
28 0 January -2 -18
32 1 February 0 -17
39 10 March 4 -12
46 19 April 8 -7
55 28 May 13 -2
65 35 June 18 2
75 40 July 24 4
74 37 August 23 3
64 29 September 18 -2
50 22 October 10 -6
35 10 November 2 -12
26 0 December -3 -18
49 19 Year 10 -7

Days of Hot Weather in Yellowstone Park

Even though the geysers are hot, the weather rarely is at Upper Geyser Basin in Yellowstone, due to the 7500 feet (2240 metres) of elevation. Only 16 days a year normally reach into the 80s Fahrenheit. Once every few years the air temperature here does make it 90 degrees (32 °C).

Number of days in Yellowstone Park of at least 60, 70 or 80 °F
  60 °F
16 °C
70 °F
21 °C
80 °F
27 °C
January 0 0 0
February 0 0 0
March 0 0 0
April 2 0 0
May 10 3 0
June 21 10 1
July 30 24 8
August 30 24 6
September 21 9 0
October 6 1 0
November 0 0 0
December 0 0 0
Year 119 71 16

How Often Yellowstone Park Has Cold Temperatures

Freezing temperatures happen every month and most nights of the year at Old Faithful in Yellowstone Park. The site typically has 267 frosty nights a year.

On an average of 80 days annually the thermometer never rises above freezing. Days that chilly can occur from October to April, including most of December and January.

Days per month on average in Yellowstone Park when the minimum temperature drops to 20, 10 or 0 °F or below
  0 °F
-18 °C
10 °F
-12 °C
20 °F
-8 °C
January 15 22 28
February 12 19 25
March 7 15 23
April 2 5 14
May 0 0 3
June 0 0 0
July 0 0 0
August 0 0 0
September 0 0 2
October 0 3 11
November 7 15 23
December 15 22 28
Year 58 101 157
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

Wyoming Temperatures
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