Climate Comfort Score
34/100
Below Average
NOAA 1991–2020 normals 41°F annual avg Public-domain federal data
Yellowstone Park Mammoth, WY Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 41°F
- Avg annual temp
- 34/100
- Comfort score
- 14.8"
- Annual precip
- 103d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Yellowstone Park Mammoth
Yellowstone Park Mammoth, Wyoming averages 41°F a year and scores 34/100 on the comfort index - below average, milder than 1% of U.S. cities.
- 41°F
- yearly average temperature, NOAA normal
- 34/100
- comfort score, milder than 1% of U.S. cities
- 14.8"
- annual precipitation · 72" snow
- 103 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
41°F (5°C)
Avg High
53°F
Avg Low
28°F
Annual Precip
14.8"
Annual Snow
71.5"
Comfort Score
34/100
Below Average
Avg Annual Temperature
41°F
30-year mean (NOAA NCEI)
Annual Precipitation
14.8"
Plus 71.5" of snow
Comfort score vs national 100-point ceiling (Yellowstone Park Mammoth) 34.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the Yellowstone Park Mammoth area.
How Yellowstone Park Mammoth compares to every U.S. city
Yellowstone Park Mammoth's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
34 Top 99% higher than 1% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Yellowstone Park Mammoth
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Yellowstone Park Mammoth's current NOAA 1991-2020 normal sits within that longer spread, and the most recent decade runs warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 31°F (0°C) | 12°F (-11°C) | 22°F (-6°C) | 0.9" | 11.5" | 30.7 | 0.0 |
| February | 34°F (1°C) | 12°F (-11°C) | 23°F (-5°C) | 0.8" | 11.5" | 27.2 | 0.0 |
| March | 42°F (5°C) | 19°F (-7°C) | 31°F (-1°C) | 1.1" | 10.9" | 28.7 | 0.0 |
| April | 50°F (10°C) | 26°F (-3°C) | 38°F (3°C) | 1.4" | 7.8" | 23.1 | 0.0 |
| May | 60°F (15°C) | 35°F (1°C) | 47°F (8°C) | 1.8" | 1.7" | 9.8 | 0.0 |
| June | 70°F (21°C) | 42°F (6°C) | 56°F (13°C) | 1.9" | 0.3" | 1.2 | 0.2 |
| July | 81°F (27°C) | 48°F (9°C) | 65°F (18°C) | 1.3" | 0.0" | 0.0 | 3.3 |
| August | 80°F (27°C) | 47°F (8°C) | 63°F (17°C) | 1.1" | 0.0" | 0.4 | 1.7 |
| September | 69°F (20°C) | 39°F (4°C) | 54°F (12°C) | 1.2" | 0.6" | 4.9 | 0.3 |
| October | 54°F (12°C) | 29°F (-2°C) | 41°F (5°C) | 1.3" | 4.7" | 19.2 | 0.0 |
| November | 39°F (4°C) | 19°F (-7°C) | 29°F (-1°C) | 1.1" | 9.9" | 26.8 | 0.0 |
| December | 30°F (-1°C) | 12°F (-11°C) | 21°F (-6°C) | 0.9" | 12.6" | 30.3 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 0.9"
Snow: 11.5"
10.6 days with precipitation
February 0.8"
Snow: 11.5"
11.4 days with precipitation
March 1.1"
Snow: 10.9"
10.5 days with precipitation
April 1.4"
Snow: 7.8"
11.3 days with precipitation
May 1.8"
Snow: 1.7"
12.8 days with precipitation
June 1.9"
Snow: 0.3"
12.5 days with precipitation
July 1.3"
9.2 days with precipitation
August 1.1"
8.5 days with precipitation
September 1.2"
Snow: 0.6"
8.7 days with precipitation
October 1.3"
Snow: 4.7"
9.7 days with precipitation
November 1.1"
Snow: 9.9"
9.6 days with precipitation
December 0.9"
Snow: 12.6"
11.9 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 14
50% probability date
Last Spring Freeze
June 3
50% probability date
Growing Season
103 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,924
Higher = more heating needed
Cooling Degree Days
126
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Yellowstone Park Mammoth's climate means for you
Yellowstone Park Mammoth runs 41°F a year - peaking in July, coldest in December.
- Gardeners get about 103 frost-free days, with the last spring freeze near June 3 - plan the planting calendar around it, not the regional average.
- Energy bills track 8,924 heating and 126 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Yellowstone Park Mammoth, WY
In Yellowstone Park Mammoth, Wyoming, the NOAA 1991–2020 climate normals put the annual average temperature at 41°F, ranging from a mean daily high of 53°F to a mean daily low of 28°F. July is typically the warmest month of the year, while December is the coldest. As thirty-year averages computed from station USC00489905, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Anyone planning to live, garden, or travel in Yellowstone Park Mammoth should weigh precipitation alongside temperature: the annual average runs 14.8 inches, with 71.5 inches typically falling as snow. The frost-free season averages 103 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near June 3 and the first fall freeze near September 14. And on the energy front, 8,924 heating degree days and 126 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Yellowstone Park Mammoth scores 34/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings July-driven heat, and winter brings December-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in Yellowstone Park Mammoth, WY? ▼
The average annual temperature in Yellowstone Park Mammoth, Wyoming is 41°F. The warmest month averages 81°F (27°C) and the coldest averages 12°F (-11°C).
How much rain does Yellowstone Park Mammoth get? ▼
Yellowstone Park Mammoth receives 14.8 inches of precipitation annually, including 71.5 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Yellowstone Park Mammoth? ▼
Yellowstone Park Mammoth has a climate comfort score of 34/100 (Below Average), milder than 1% of U.S. cities in the PlainClimate database.
When is the growing season in Yellowstone Park Mammoth? ▼
Yellowstone Park Mammoth has approximately 103 frost-free days per year, with the last spring freeze around June 3 and the first fall freeze around September 14.
How much energy does heating and cooling require in Yellowstone Park Mammoth? ▼
Yellowstone Park Mammoth has 8,924 heating degree days and 126 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Yellowstone Park Mammoth climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00489905 near Yellowstone Park Mammoth.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00489905. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.