Climate for Station: Yellowstone Park Mammoth, Wyoming, United States

Mammoth

Wyoming, United States of America

2026-01-21 18:07

-3.9°C

Feels -6.6°C

H: -1.4°C / L: -18.6°C

Precip: 0mm | Wind: 6.1 kph

▼ 0.8°C vs historical high

Cloudy

2026-01-22

H: -2°C

L: -17.5°C

Rain: 0%

Rainfall: 0mm

Wind: 6.8kph

▼ 1.1°C

2026-01-23

H: -11°C

L: -22.9°C

Rain: 0%

Rainfall: 0mm

Wind: 11.2kph

▼ 9.4°C

2026-01-24

H: -10.2°C

L: -24.9°C

Rain: 0%

Rainfall: 0mm

Wind: 10.4kph

▼ 9.2°C

2026-01-25

H: -3.4°C

L: -18.8°C

Rain: 0%

Rainfall: 0.04mm

Wind: 11.5kph

▼ 2.2°C

2026-01-26

H: -2.5°C

L: -18.1°C

Rain: 0%

Rainfall: 0.03mm

Wind: 13kph

▼ 1.3°C

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Station Statistics

10-Year Trend

High: -0.43 °C/decade

Low: -2.53 °C/decade

Rain: -0.08 mm/decade

25-Year Trend

High: +0.04 °C/decade

Low: -0.08 °C/decade

Rain: +0.13 mm/decade

50-Year Trend

High: +0.27 °C/decade

Low: +0.17 °C/decade

Rain: +0.04 mm/decade

All-Time Trend

High: +0.13 °C/decade

Low: +0.09 °C/decade

Rain: -0.02 mm/decade

Percentage Above-Average Days

Last 12 Months: 50.0%

This Year: 64.2%

Precipitation Concentration Index (PCI) ℹ️

Last 12 Months: 12.4

Historical Average: 12.5

Percentile Rank of Last 12 Months ℹ️

High: 93^rd percentile

Low: 61^st percentile

Rain: 16^th percentile

Change in Variance ℹ️

High: +8.3%

Low: +6.1%

Intraday: -3.3%

Data Coverage

73.7%

First Year of Data

1897

Station Location

Weather Records

	Max High	Avg High	Min High	Max Avg	Avg Avg	Min Avg	Max Low	Avg Low	Min Low	Max Precipitation	Avg Precipitation	Max Snow	Avg Snow
Record	37.2 °C	—	-28.9 °C	—	—	—	19.4 °C	—	-37.8 °C	57.9 mm	—	457.0 mm	—
January	12.8 °C	-1.4 °C	-28.9 °C	—	—	—	2.8 °C	-11.8 °C	-37.8 °C	40.6 mm	0.9 mm	406.0 mm	11.9 mm
February	13.3 °C	0.6 °C	-27.8 °C	—	—	—	4.4 °C	-11.1 °C	-37.2 °C	20.3 mm	0.8 mm	241.0 mm	10.7 mm
March	18.9 °C	4.4 °C	-20.6 °C	—	—	—	6.7 °C	-8.0 °C	-31.7 °C	53.3 mm	1.0 mm	457.0 mm	10.9 mm
April	25.6 °C	9.8 °C	-9.4 °C	—	—	—	9.4 °C	-3.2 °C	-21.1 °C	22.1 mm	1.1 mm	297.0 mm	5.7 mm
May	31.7 °C	15.6 °C	-4.4 °C	—	—	—	12.8 °C	1.4 °C	-14.4 °C	47.2 mm	1.6 mm	254.0 mm	1.7 mm
June	33.3 °C	20.8 °C	2.8 °C	—	—	—	19.4 °C	5.2 °C	-6.7 °C	57.9 mm	1.7 mm	140.0 mm	0.2 mm
July	37.2 °C	26.8 °C	10.0 °C	—	—	—	18.9 °C	8.5 °C	-6.1 °C	35.6 mm	1.1 mm	0.0 mm	0.0 mm
August	36.1 °C	26.0 °C	9.4 °C	—	—	—	18.3 °C	7.7 °C	-4.4 °C	57.2 mm	1.1 mm	51.0 mm	0.0 mm
September	34.4 °C	20.0 °C	-2.2 °C	—	—	—	15.0 °C	3.4 °C	-12.8 °C	31.8 mm	1.0 mm	152.0 mm	0.7 mm
October	27.2 °C	12.8 °C	-12.2 °C	—	—	—	11.1 °C	-1.3 °C	-22.2 °C	29.5 mm	1.0 mm	305.0 mm	3.4 mm
November	18.9 °C	3.9 °C	-23.9 °C	—	—	—	7.8 °C	-6.8 °C	-32.8 °C	46.7 mm	1.0 mm	406.0 mm	9.5 mm
December	13.9 °C	-0.8 °C	-26.1 °C	—	—	—	10.0 °C	-10.8 °C	-37.2 °C	43.2 mm	0.8 mm	254.0 mm	11.1 mm

Plots

Current Year Climate Trends vs Historical

Current Year Climate Trends vs Historical - Average Temperature this Year

Current Year Climate Trends vs Historical - Rainfall this Year

Max Temperature this Year | 1 of 4

Climate 12-Month Moving Averages

Climate 12-Month Moving Averages - Average Temperature 12-Month MA

Climate 12-Month Moving Averages - Rainfall 12-Month MA

Max Temperature 12-Month MA | 1 of 4

Daily Average Temperatures Throughout the Year

Daily Average Temperatures Throughout the Year - Average Temperature Throughout Year

Average Max Temperature Throughout Year | 1 of 3