Arvada, CO weather in August
August in Arvada: warm, with some rain. Highs 86°F, lows 55°F, about 8 wet days. This is the peak of the warm season in Arvada.
- Normal high
- 86°F
- Normal low
- 55°F
- Wet days
- 8
- 1.6 in total
- Muggy days
- 0
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 88°F | 84°F |
| Normal low | 57°F | 51°F |
| Chance of a wet day | 29% | 25% |
| Sunrise / sunset | 5:59 am / 8:14 pm | 6:27 am / 7:33 pm |
| Daylight | 14.2 h | 13.1 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 am60°Fdew point 49°F
- 9 am73°Fdew point 48°F
- Noon82°Fdew point 44°F
- 3 pm83°Fdew point 44°F
- 6 pm76°Fdew point 47°F
- 9 pm68°Fdew point 49°F
NOAA hourly normals (local standard time) from Aurora Buckley Fld ANGB (19 mi away); average wind 8 mph; clear or few clouds in 38% of daytime hours, mostly cloudy or overcast in 38%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F5 of 31
- Hot dayshigh 90°F or more12 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow8 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 1.6 in; a dry August brings about 0.6 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, 1991-20202020: average high 91°F
- Coolest August2004: average high 82°F
- Wettest August2004: 4.4 in
- Driest August2020: 0.1 in
- Highest reading102°F (August 16, 2002)
- Lowest reading37°F (August 27, 1992)
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 | 88°F | 86°F | 79°F |
| Normal low | 57°F | 55°F | 45°F |
| Wet days | 9 | 8 | 7 |
| Comfortable days | 4 | 5 | 11 |
| Daylight | 14.7 h | 13.7 h | 12.4 h |
Highs change by -2°F from July and -7°F into September.
Nearby alternatives in August
- Cooler: Estes Park, CO46 mi · high 78°F · 13 wet days
How Arvada ranks in August
- Normal high188th warmest of 378 cities; 5th of 17 in Colorado
- Wet days164th driest of 378
- Comfortable days126th most of 341
What to pack for Arvada in August
- Light, breathable clothing – highs near 86°F
- Layers – afternoons near 86°F but nights near 55°F
- A rain jacket or umbrella – rain on about 8 days
Heating and cooling
August has 14 heating degree days and 181 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Arvada in August?
The normal high is 86°F and the normal low is 55°F. From 1991 to 2020 the hottest August reading was 102°F (August 16, 2002).
Does it rain a lot in Arvada in August?
About 8 days in August have at least 0.01 in of precipitation, and the normal total is 1.6 in. The wettest August in 1991-2020 was in 2004 (4.4 in); the driest was in 2020 (0.1 in).
Is August a good time to visit Arvada?
August ranks 8th of 12 months on our comfort score for Arvada (53 out of 100). It has about 5 comfortable days and about 12 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Wheat Ridge 2 (USC00058995), 2.5 mi SW of the city center, 5,398 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Aurora Buckley Fld ANGB (USW00023036), 19 mi ESE of the city center, 5,663 ft (314 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Buckley Air Force Base (724695-23036), 19 mi ESE of the city center, 5,663 ft (314 ft higher than the city). Hourly observations, 1991-2020.