Cheyenne, WY weather in August
Expect warm weather with frequent rain in Cheyenne in August, with highs near 82°F and lows near 54°F. Rain falls on about 10 days. It is one of the warmest months in Cheyenne. Good for outdoor plans.
- Normal high
- 82°F
- Normal low
- 54°F
- Wet days
- 10
- 1.5 in total
- Muggy days
- 0
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 84°F | 79°F |
| Normal low | 57°F | 51°F |
| Chance of a wet day | 36% | 30% |
| Sunrise / sunset | 5:55 am / 8:16 pm | 6:24 am / 7:34 pm |
| Daylight | 14.3 h | 13.2 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 August day
- 6 am57°Fdew point 45°F
- 9 am72°Fdew point 45°F
- Noon78°Fdew point 42°F
- 3 pm78°Fdew point 43°F
- 6 pm73°Fdew point 45°F
- 9 pm64°Fdew point 47°F
NOAA hourly normals (local standard time) from Cheyenne (1 mi away); average wind 10 mph; clear or few clouds in 71% of daytime hours, mostly cloudy or overcast in 20%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F10 of 31
- Hot dayshigh 90°F or more4 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in4 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 1.5 in; a dry August brings about 0.8 in and a wet one about 1.9 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How August varies from year to year
- Warmest August, 1991-20202020: average high 88°F
- Coolest August1997: average high 77°F
- Wettest August2008: 6.5 in
- Driest August2012: 0.1 in
- Highest reading98°F (August 2, 2008)
- Lowest reading37°F (August 20, 2016)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 84°F | 82°F | 73°F |
| Normal low | 56°F | 54°F | 46°F |
| Wet days | 11 | 10 | 7 |
| Comfortable days | 8 | 10 | 15 |
| Daylight | 14.8 h | 13.8 h | 12.5 h |
Highs change by -2°F from July and -9°F into September.
Nearby alternatives in August
- Warmer: Greeley, CO50 mi · high 89°F · 7 wet days
- Drier: Greeley, CO50 mi · high 89°F · 7 wet days
- Cooler: Breckenridge, CO131 mi · high 68°F · 14 wet days
How Cheyenne ranks in August
- Normal high276th warmest of 378 cities; 3rd of 4 in Wyoming
- Wet days282nd driest of 378
- Comfortable days62nd most of 341
What to pack for Cheyenne in August
- Layers – afternoons near 82°F but nights near 54°F
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
August has 33 heating degree days and 130 cooling degree days (base 65°F), 2% of the year's total heating and cooling demand.
Questions
How hot is Cheyenne in August?
The normal high is 82°F and the normal low is 54°F. From 1991 to 2020 the hottest August reading was 98°F (most recently on August 2, 2008).
Does it rain a lot in Cheyenne in August?
About 10 days in August have at least 0.01 in of precipitation, and the normal total is 1.5 in. The wettest August in 1991-2020 was in 2008 (6.6 in); the driest was in 2012 (0.1 in).
Is August a good time to visit Cheyenne?
August ranks 4th of 12 months on our comfort score for Cheyenne (64 out of 100). It has about 10 comfortable days and about 4 days at 90°F or hotter. 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.