Centennial, WY climate
Centennial has cold, snowy winters and cool summers, with very little rain. A typical July afternoon reaches 76°, a January night drops to 10°, and about 98 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Centennial feels like
Winter
Spring
Summer
Fall
Centennial weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 31° | 10° | 1.2" | 10.4" | 8 | 29 | 15° – 27° |
| February | 33° | 11° | 1.0" | 11.2" | 9 | 26 | 17° – 27° |
| March | 40° | 18° | 1.3" | 15.0" | 9 | 18 | 23° – 36° |
| April | 48° | 23° | 1.9" | 16.8" | 11 | 8 | 29° – 40° |
| May | 58° | 31° | 2.0" | 7.9" | 10 | 2 | 39° – 49° |
| June | 69° | 39° | 1.4" | 0.8" | 9 | 0 | 49° – 59° |
| July | 76° | 45° | 1.3" | 0 | 10 | 0 | 55° – 64° |
| August | 74° | 43° | 1.2" | 0 | 11 | 0 | 54° – 63° |
| September | 66° | 36° | 1.3" | 1.7" | 9 | 1 | 45° – 55° |
| October | 53° | 26° | 1.1" | 10.0" | 7 | 4 | 32° – 45° |
| November | 39° | 17° | 1.2" | 12.5" | 8 | 17 | 19° – 36° |
| December | 31° | 10° | 1.1" | 11.3" | 8 | 26 | 14° – 24° |
| Year | 51° | 26° | 16.1" | 97.6" | 107 | 132 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Centennial
Centennial gets 16 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 107 days a year. Snow covers the ground about 132 days of the year.
About 106 frost-free days a year
In half of years the last 32° night comes by June 2 and the first one by September 19. That leaves about 106 frost-free days for gardens, shorter than 99% of U.S. towns.
Heating and cooling a home in Centennial
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Centennial, 100% of that work is heating and 0% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Centennial compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Centennial averaged 1.9° warmer than the 1900s. The biggest change is in March (+4.1°). The shift is larger than in 92% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Centennial’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 19° to 36°. August is the most reliable, staying within 9°.
Common questions about Centennial’s climate
What is the coldest month in Centennial?
January, with a typical high of 31° and a low of 10°.
What is the hottest month in Centennial?
July, with a typical high of 76° and a low of 45°.
How much snow does Centennial get?
About 98 inches in a normal winter, most of it in April.
When is the first frost in Centennial?
In half of years the first 32° night comes by September 19, and the last spring frost by June 2.
What is the rainiest month in Centennial?
May, with 2.0 inches of rain and melted snow. The year totals 16 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Centennial itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Hohnholz Rch, CO (24 mi, snow) and Centennial 1ne, WY (1 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.