Cheyenne, WY weather in May
May in Cheyenne: cool, with frequent rain and some snow. Highs 64°F, lows 40°F, rain or snow on about 13 days and about 3.4 in of snow.
- Normal high
- 64°F
- Normal low
- 40°F
- Wet days
- 13
- 2.4 in total
- Snowfall
- 3.4 in
- snow on the ground 1 day
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 58°F | 71°F |
| Normal low | 35°F | 45°F |
| Chance of a wet day | 40% | 41% |
| Sunrise / sunset | 5:56 am / 7:55 pm | 5:29 am / 8:24 pm |
| Daylight | 14.0 h | 14.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Mountain Time).
A typical May day
- 6 am45°Fdew point 35°F
- 9 am55°Fdew point 34°F
- Noon60°Fdew point 34°F
- 3 pm61°Fdew point 34°F
- 6 pm58°Fdew point 35°F
- 9 pm50°Fdew point 37°F
NOAA hourly normals (local standard time) from Cheyenne (1 mi away); average wind 12 mph; clear or few clouds in 54% of daytime hours, mostly cloudy or overcast in 36%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F15 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow13 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below5 of 31
- Snow on the groundsnow depth 1 in or more1 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain and snow in May
Normal precipitation is 2.4 in; a dry May brings about 1.4 in and a wet one about 3.0 in (25th and 75th percentiles). About 1 day brings half an inch or more. Normal snowfall is 3.4 in, with about 1 day of an inch or more.
How May varies from year to year
- Warmest May, 1991-20201994: average high 70°F
- Coolest May1995: average high 55°F
- Wettest May1995: 6.0 in
- Driest May2012: 0.3 in
- Highest reading91°F (May 29, 2003)
- Lowest reading9°F (May 2, 2013)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 55°F | 64°F | 77°F |
| Normal low | 31°F | 40°F | 49°F |
| Wet days | 11 | 13 | 11 |
| Comfortable days | 8 | 15 | 16 |
| Daylight | 13.3 h | 14.5 h | 15.1 h |
Highs change by +9°F from April and +13°F into June.
Nearby alternatives in May
- Warmer: Fort Collins, CO41 mi · high 71°F · 12 wet days
- Drier: Centennial, CO108 mi · high 69°F · 10 wet days
- Cooler: Breckenridge, CO131 mi · high 54°F · 10 wet days
How Cheyenne ranks in May
- Normal high344th warmest of 378 cities; 3rd of 4 in Wyoming
- Wet days333rd driest of 378
- Comfortable days119th most of 339
What to pack for Cheyenne in May
- A warm jacket – lows near 40°F, highs near 64°F
- A rain jacket or umbrella – rain or snow on about 13 days
- Waterproof boots – about 3.4 in of snow in a typical year
Frost in May
The last spring frost typically comes around May 12; in 1 year in 10 it comes after May 26. All frost dates for Cheyenne.
Heating and cooling
May has 398 heating degree days and 4 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How cold is Cheyenne in May?
The normal high is 64°F and the normal low is 40°F. From 1991 to 2020 the coldest May reading was 9°F (May 2, 2013).
Does it rain a lot in Cheyenne in May?
About 13 days in May have at least 0.01 in of precipitation, and the normal total is 2.4 in. The wettest May in 1991-2020 was in 1995 (6.0 in); the driest was in 2012 (0.3 in).
Does it snow in Cheyenne in May?
Yes. Normal snowfall in May is 3.4 in, and snow covers the ground on about 1 day.
Is May a good time to visit Cheyenne?
May ranks 2nd of 12 months on our comfort score for Cheyenne (72 out of 100). It has about 15 comfortable days. The best months are May and June.
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.