Gillette, WY weather in August
August in Gillette: warm, with some rain. Highs 85°F, lows 56°F, rain on about 6 days. This is the peak of the warm season in Gillette.
- Normal high
- 85°F
- Normal low
- 56°F
- Wet days
- 6
- 1.4 in total
- Daylight
- 14.0 h
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 88°F | 82°F |
| Normal low | 58°F | 52°F |
| Chance of a wet day | 25% | 20% |
| Sunrise / sunset | 5:49 am / 8:27 pm | 6:23 am / 7:40 pm |
| Daylight | 14.6 h | 13.3 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 am59°Fdew point 47°F
- 9 am73°Fdew point 47°F
- Noon81°Fdew point 44°F
- 3 pm83°Fdew point 42°F
- 6 pm79°Fdew point 43°F
- 9 pm65°Fdew point 45°F
NOAA hourly normals (local standard time) from Gillette Campbell Airport (4 mi away); average wind 9 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F (temperature only: no humidity station nearby)6 of 31
- Hot dayshigh 90°F or more10 of 31
- Wet daysat least 0.01 in of rain or melted snow6 of 31
- Notable rainat least 0.10 in3 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 1.4 in; a dry August brings about 0.5 in and a wet one about 2.1 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How August varies from year to year
- Warmest August, 1991-20202011: average high 91°F
- Coolest August1993: average high 78°F
- Wettest August2019: 3.6 in
- Driest August2001: 0.3 in
- Highest reading102°F (August 29, 2012)
- Lowest reading34°F (August 23, 2015)
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 | 86°F | 85°F | 75°F |
| Normal low | 57°F | 56°F | 46°F |
| Wet days | 8 | 6 | 6 |
| Comfortable days | 6 | 6 | 12 |
| Daylight | 15.1 h | 14.0 h | 12.5 h |
Highs change by -1°F from July and -10°F into September.
Nearby alternatives in August
- Cooler: Keystone, SD107 mi · high 78°F · 9 wet days
How Gillette ranks in August
- Normal high202nd warmest of 378 cities; 2nd of 4 in Wyoming
- Wet days131st driest of 378
What to pack for Gillette in August
- Light, breathable clothing – highs near 85°F
- Layers – afternoons near 85°F but nights near 56°F
Heating and cooling
August has 29 heating degree days and 201 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Gillette in August?
The normal high is 85°F and the normal low is 56°F. From 1991 to 2020 the hottest August reading was 102°F (August 29, 2012).
Does it rain a lot in Gillette in August?
About 6 days in August have at least 0.01 in of precipitation, and the normal total is 1.4 in. The wettest August in 1991-2020 was in 2019 (3.6 in); the driest was in 2001 (0.3 in).
Is August a good time to visit Gillette?
August ranks 7th of 12 months on our comfort score for Gillette (57 out of 100). It has about 6 comfortable days (judged by temperature only) and about 10 days at 90°F or hotter. The best months are May and June.
Where the numbers come from
- Temperature, rain, snowfall and snow depth: Gillette 4SE (USC00483855), 3.1 mi ESE of the city center, 4,640 ft (86 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates and humidity and wind by hour: Gillette Campbell Airport (USW00094023), 3.9 mi NNW of the city center, 4,354 ft (200 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Not available for this location: cloud cover and daily humidity and wind (no station close enough or similar enough in elevation).