Cheyenne weather in August: Cheyenne, Wyoming: normal highs, lows, rain and records for August
Cheyenne in August has a normal high of 82°F and a normal low of 54°F, a daily mean of 68°F, falling from 84°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 1.52 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 12°C, 39 mm of precipitation in August.
- NOAA stationCheyenne Weather Office Airport
- Station IDUSW00024018
- Location41.15°N 104.81°W
- Elevation6,128 ft (1,868 m)
- Population65,704
- Jan 40° 18°
- Feb 41° 18°
- Mar 49° 25°
- Apr 55° 31°
- May 64° 40°
- Jun 77° 49°
- Jul 84° 56°
- Aug 82° 54°
- Sep 73° 46°
- Oct 59° 34°
- Nov 48° 25°
- Dec 39° 18°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Cheyenne in August?
The normal high is 82°F and the normal low 54°F, for a daily mean of 68.1°F. August is 2.0°F cooler than July and 8.5°F warmer than September. August is the 2nd warmest month of the year in Cheyenne and the 5th wettest. Across the month the normal high falls 5°F, from 84°F on August 1 to 79°F on August 31. From one year to the next August's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 66°F and 70°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 84°F | 57°F | 36% | 16% |
| August 8 | 83°F | 56°F | 35% | 15% |
| August 15 | 82°F | 55°F | 33% | 14% |
| August 22 | 81°F | 53°F | 31% | 13% |
| August 31 | 79°F | 51°F | 29% | 12% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 84°F | 57°F | 36% | 16% | 14 h 20 min |
| August 2 | 84°F | 57°F | 36% | 16% | 14 h 20 min |
| August 3 | 84°F | 57°F | 36% | 16% | 14 h 20 min |
| August 4 | 84°F | 57°F | 36% | 16% | 14 h 20 min |
| August 5 | 84°F | 56°F | 36% | 15% | 14 h 20 min |
| August 6 | 84°F | 56°F | 35% | 15% | 14 h 10 min |
| August 7 | 83°F | 56°F | 35% | 15% | 14 h 10 min |
| August 8 | 83°F | 56°F | 35% | 15% | 14 h 10 min |
| August 9 | 83°F | 56°F | 35% | 14% | 14 h 10 min |
| August 10 | 83°F | 56°F | 34% | 14% | 14 h |
| August 11 | 83°F | 56°F | 34% | 14% | 14 h |
| August 12 | 83°F | 55°F | 34% | 14% | 14 h |
| August 13 | 83°F | 55°F | 34% | 14% | 14 h |
| August 14 | 82°F | 55°F | 33% | 14% | 13 h 50 min |
| August 15 | 82°F | 55°F | 33% | 14% | 13 h 50 min |
| August 16 | 82°F | 55°F | 33% | 14% | 13 h 50 min |
| August 17 | 82°F | 54°F | 33% | 13% | 13 h 50 min |
| August 18 | 82°F | 54°F | 32% | 13% | 13 h 50 min |
| August 19 | 82°F | 54°F | 32% | 13% | 13 h 40 min |
| August 20 | 82°F | 54°F | 32% | 13% | 13 h 40 min |
| August 21 | 81°F | 53°F | 31% | 13% | 13 h 40 min |
| August 22 | 81°F | 53°F | 31% | 13% | 13 h 40 min |
| August 23 | 81°F | 53°F | 31% | 13% | 13 h 30 min |
| August 24 | 81°F | 53°F | 31% | 13% | 13 h 30 min |
| August 25 | 81°F | 53°F | 30% | 12% | 13 h 30 min |
| August 26 | 80°F | 52°F | 30% | 12% | 13 h 30 min |
| August 27 | 80°F | 52°F | 30% | 12% | 13 h 20 min |
| August 28 | 80°F | 52°F | 30% | 12% | 13 h 20 min |
| August 29 | 80°F | 52°F | 29% | 12% | 13 h 20 min |
| August 30 | 80°F | 51°F | 29% | 12% | 13 h 10 min |
| August 31 | 79°F | 51°F | 29% | 12% | 13 h 10 min |
- Normal high
- 82°FAugust average
- Normal low
- 54°FAugust average
- Precipitation
- 1.52 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 14 h 20 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 29
- Days at 80°F or more
- 22
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024018; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Cheyenne in August?
On a given August day the chance of 0.01 inch or more is 33% on average, highest around August 1 (36%). In all, 1.52 in falls on 10 days of a normal August.
In a normal August in Cheyenne, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024018.
How humid and windy is Cheyenne in August?
At 3 p.m. the normal temperature is 76°F with 27% relative humidity and a dew point of 40°F; at 6 a.m. it is 55°F with 63% humidity. The wind averages 9.7 mph, most often from the southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 55°F | 43°F | 63% | 8.4 mph | 80% |
| 9 a.m. | 70°F | 42°F | 37% | 10.6 mph | 81% |
| noon | 76°F | 40°F | 27% | 11.7 mph | 76% |
| 3 p.m. | 76°F | 40°F | 27% | 12.1 mph | 65% |
| 6 p.m. | 71°F | 42°F | 35% | 10.2 mph | 69% |
| 9 p.m. | 62°F | 44°F | 52% | 8.2 mph | 76% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024018. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Cheyenne?
The warmest August temperature on Cheyenne's official record (since 1872) is 98°F, on August 2, 2008; the coldest is 25°F, on August 25, 1910. The wettest August brought 6.73 in (1930).
The August mean against the 1991-2020 normal of 68.1°F: 2021 70.4°F (+2.3), 2022 71.8°F (+3.7), 2023 68.7°F (+0.6), 2024 69.3°F (+1.2), 2025 68.2°F (+0.1), 2026 71.1°F (+3.0). 6 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 70.4°F | +2.3°F | 0.48 in |
| 2022 | 71.8°F | +3.7°F | 0.66 in |
| 2023 | 68.7°F | +0.6°F | 3.47 in |
| 2024 | 69.3°F | +1.2°F | 3.24 in |
| 2025 | 68.2°F | +0.1°F | 1.12 in |
| 2026 | 71.1°F | +3.0°F | 2.85 in |
Source: records: ACIS, NWS threaded record CYSthr; recent months: ACIS, station USW00024018. Records and recent months use complete months only.
How does August in Cheyenne compare across Wyoming?
Across the 71 places PlainClimate covers in Wyoming, August normal highs run from 74°F in Sundance to 91°F in Basin; Cheyenne's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.