Climateby Month

Cheyenne, WY climate by month

NOAA 1991-2020 normals · 6,091 ft elevation

Summers in Cheyenne are warm; winters are cold and snowy. Highs peak at 84°F in July and fall to 39°F in December. The wettest month is May (about 13 wet days) and the driest is January (about 5). Normal snowfall is about 63 in a year. The most comfortable time to visit is May and June.

Warmest month
84°F
July normal high
Coldest month
18°F
December normal low
Wet days a year
101
15.4 in of precipitation
Snow a year
62.9 in
normal snowfall

How warm is Cheyenne?

Normal highs range from 39°F in December to 84°F in July.

0°20°40°60°80°100° January: normal high 40°F (4°C), low 18°F (-8°C) February: normal high 41°F (5°C), low 18°F (-8°C) March: normal high 49°F (9°C), low 25°F (-4°C) April: normal high 55°F (13°C), low 31°F (-1°C) May: normal high 64°F (18°C), low 40°F (4°C) June: normal high 77°F (25°C), low 49°F (9°C) July: normal high 84°F (29°C), low 56°F (13°C) 84° 56° August: normal high 82°F (28°C), low 54°F (12°C) September: normal high 73°F (23°C), low 46°F (8°C) October: normal high 59°F (15°C), low 34°F (1°C) November: normal high 48°F (9°C), low 25°F (-4°C) December: normal high 39°F (4°C), low 18°F (-8°C) 39° 18° JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Cheyenne?

May has the most wet days (about 13); the year brings about 15 in of precipitation.

January: 5 wet days 5 February: 7 wet days March: 8 wet days April: 11 wet days May: 13 wet days 13 June: 11 wet days July: 11 wet days August: 10 wet days September: 7 wet days October: 7 wet days November: 6 wet days December: 6 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 62.9 in a year, most of it in April.

January: 6.3 in of snow February: 9.0 in of snow March: 9.7 in of snow April: 11.3 in of snow 11.3 May: 3.4 in of snow June: 0.0 in of snow 0.0 July: 0.0 in of snow August: 0.0 in of snow September: 1.0 in of snow October: 5.9 in of snow November: 7.5 in of snow December: 8.8 in of snow JFMAMJJASOND

How humid is Cheyenne?

Muggy days (dew point 65°F or higher) are rare in any month.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 0 muggy days July: 0 muggy days August: 0 muggy days September: 0 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Cheyenne Airport, 1.4 mi NNE of the city center.

How much daylight?

Daylight ranges from about 9.3 hours in December to 15.1 hours in June.

January: 9.6 hours of daylight February: 10.6 hours of daylight March: 12.0 hours of daylight April: 13.3 hours of daylight May: 14.5 hours of daylight June: 15.1 hours of daylight 15.1 July: 14.8 hours of daylight August: 13.8 hours of daylight September: 12.5 hours of daylight October: 11.1 hours of daylight November: 9.9 hours of daylight December: 9.3 hours of daylight 9.3 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Cheyenne, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 40°F18°F 0.3 in5 6.3 in 0 9.6 h
February 41°F18°F 0.5 in7 9.0 in 0 10.6 h
March 49°F25°F 1.0 in8 9.7 in 0 12.0 h
April 55°F31°F 1.8 in11 11.3 in 0 13.3 h
May 64°F40°F 2.4 in13 3.4 in 0 14.5 h
June 77°F49°F 2.2 in11 0.0 in 0 15.1 h
July 84°F56°F 2.1 in11 0.0 in 0 14.8 h
August 82°F54°F 1.5 in10 0.0 in 0 13.8 h
September 73°F46°F 1.5 in7 1.0 in 0 12.5 h
October 59°F34°F 1.0 in7 5.9 in 0 11.1 h
November 48°F25°F 0.6 in6 7.5 in 0 9.9 h
December 39°F18°F 0.5 in6 8.8 in 0 9.3 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Cheyenne

By our comfort score, the best months are May and June.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 360115
Feb 390213
Mar 49337
Apr 59845
May 721561
Jun 751652
Jul 60858
Aug 641044
Sep 711541
Oct 611233
Nov 43329
Dec 340215

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Cheyenne

The last spring frost typically comes around May 12, and the first fall frost around Oct 1, leaving 141 frost-free days in a typical year.

Frost and freeze dates for Cheyenne
Typical date1 year in 10
Last spring frost (32°F)May 12after May 26
First fall frost (32°F)Oct 1before Sep 18
Last hard freeze (28°F)May 2after May 14
First hard freeze (28°F)Oct 11before Sep 28
Frost-free season141 daysunder 122 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Cheyenne (USW00024018), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Wyoming.

Hottest and coldest readings, 1991-2020

The highest reading was 99°F (June 28, 2018); the lowest was -24°F (February 2, 2011).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Cheyenne

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Cheyenne (USW00024018), 1.1 mi NE of the city center, 6,128 ft . NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Cheyenne Airport (725640-24018), 1.4 mi NNE of the city center, 6,118 ft . Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error