Climate averages 1991–2020
Centennial weather
in August.
A warm, moderately wet month: the 2nd warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Centennial: daytime highs average 27.7°C and nights cool to about 13.4°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 47 mm of rain on roughly 9 days, which makes August a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 43 min on an average August day.
The nearest other city in this atlas is Highlands Ranch (8 km away). In August its highs average 27.6°C, about as warm as Centennial, with 47 mm of rain.
Among the 498 cities listed in the United States, Centennial ranks joint 341st of 498 for the warmest August highs and joint 186th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Centennial is 2.2°C cooler than that mean.
From August to September, average highs fall by 3.9°C to 23.8°C, and monthly rainfall falls from 47 mm to 39 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Centennial climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.3°C-10.1°C | -10.1°C | 22 | 5.3 | 9.710 h |
| February | 5.6°C-9.2°C | -9.2°C | 24 | 5.7 | 10.711 h |
| March | 10.2°C-5.2°C | -5.2°C | 51 | 7.8 | 11.912 h |
| April | 13.7°C-1.2°C | -1.2°C | 75 | 10.0 | 13.213 h |
| May | 19.2°C4.8°C | 4.8°C | 88 | 12.5 | 14.314 h |
| June | 25.8°C10.5°C | 10.5°C | 57 | 9.6 | 14.915 h |
| July | 28.9°C14.1°C | 14.1°C | 56 | 9.7 | 14.715 h |
| August, selected | 27.7°C13.4°C | 13.4°C | 47 | 9.3 | 13.714 h |
| September | 23.8°C9.1°C | 9.1°C | 39 | 6.3 | 12.512 h |
| October | 16.5°C1.8°C | 1.8°C | 42 | 6.3 | 11.211 h |
| November | 9.2°C-5.4°C | -5.4°C | 31 | 5.9 | 10.010 h |
| December | 3.9°C-10.3°C | -10.3°C | 22 | 4.9 | 9.49 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Highlands Ranch in AugustUnited States · 8 kmHigh 27.6°C · Low 13.2°C · 47 mm rain
- Aurora (Colorado), United States in AugustUnited States · 17 kmHigh 29.2°C · Low 15.2°C · 34 mm rain
- Denver in AugustUnited States · 20 kmHigh 28.2°C · Low 13.9°C · 39 mm rain
- Lakewood in AugustUnited States · 22 kmHigh 28.1°C · Low 13.7°C · 39 mm rain
- Arvada in AugustUnited States · 31 kmHigh 28.0°C · Low 13.7°C · 39 mm rain
- Westminster (Colorado), United States in AugustUnited States · 32 kmHigh 28.1°C · Low 13.8°C · 39 mm rain
- Thornton in AugustUnited States · 33 kmHigh 28.0°C · Low 13.8°C · 39 mm rain
- Boulder in AugustUnited States · 59 kmHigh 27.5°C · Low 13.7°C · 71 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Centennial) is explained once on the Centennial year overview and on the Sources, method and limits page.
Highlands Ranch lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.