Climate averages 1991–2020
Centennial weather
in May.
A mild, moderately wet month: the 5th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Centennial: daytime highs average 19.2°C and nights cool to about 4.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 88 mm of rain on roughly 13 days, which makes May a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 20 min on an average May day.
The nearest other city in this atlas is Highlands Ranch (8 km away). In May its highs average 19.2°C, about as warm as Centennial, with 88 mm of rain.
Among the 498 cities listed in the United States, Centennial ranks joint 436th of 498 for the warmest May highs and joint 276th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Centennial is 4.6°C cooler than that mean.
From May to June, average highs rise by 6.6°C to 25.8°C, and monthly rainfall falls from 88 mm to 57 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Highlands Ranch in MayUnited States · 8 kmHigh 19.2°C · Low 4.5°C · 88 mm rain
- Aurora (Colorado), United States in MayUnited States · 17 kmHigh 20.7°C · Low 6.7°C · 63 mm rain
- Denver in MayUnited States · 20 kmHigh 19.7°C · Low 5.2°C · 82 mm rain
- Lakewood in MayUnited States · 22 kmHigh 19.6°C · Low 5.0°C · 82 mm rain
- Arvada in MayUnited States · 31 kmHigh 19.6°C · Low 5.1°C · 82 mm rain
- Westminster (Colorado), United States in MayUnited States · 32 kmHigh 19.6°C · Low 5.2°C · 82 mm rain
- Thornton in MayUnited States · 33 kmHigh 19.6°C · Low 5.3°C · 82 mm rain
- Boulder in MayUnited States · 59 kmHigh 19.2°C · Low 5.1°C · 103 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.