Centennial, Wyoming climate: Normal weather by month, frost dates and records
Centennial's normal year runs from 12°F January nights to 77°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 4.8°C, January lows of −11°C, July highs of 25°C.
- NOAA stationCentennial (1 mi NE)
- Station IDUSC00481610
- Location41.31°N 106.13°W
- Elevation8,170 ft (2,490 m)
- Population (census place)364
On October 22, the normal high in Centennial is 53°F and the normal low 25°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Centennial.
- Jan 34° 12°
- Feb 35° 13°
- Mar 43° 18°
- Apr 50° 24°
- May 61° 32°
- Jun 71° 41°
- Jul 77° 48°
- Aug 75° 46°
- Sep 68° 39°
- Oct 56° 28°
- Nov 43° 18°
- Dec 34° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Centennial each month?
July is the warmest month, with normal highs of 77°F; January the coldest, with normal lows of 12°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 34°F | 12°F | 23.2°F | – | <1 | 31 | 9 h 30 min |
| February | 35°F | 13°F | 23.9°F | – | <1 | 28 | 10 h 40 min |
| March | 43°F | 18°F | 30.6°F | – | <1 | 30 | 11 h 50 min |
| April | 50°F | 24°F | 36.9°F | – | <1 | 27 | 13 h 20 min |
| May | 61°F | 32°F | 46.1°F | – | <1 | 16 | 14 h 30 min |
| June | 71°F | 41°F | 56.1°F | – | <1 | 4 | 15 h 10 min |
| July | 77°F | 48°F | 62.4°F | – | <1 | <1 | 14 h 50 min |
| August | 75°F | 46°F | 60.3°F | – | <1 | <1 | 13 h 50 min |
| September | 68°F | 39°F | 53.2°F | – | <1 | 8 | 12 h 30 min |
| October | 56°F | 28°F | 41.6°F | – | <1 | 23 | 11 h 10 min |
| November | 43°F | 18°F | 30.3°F | – | <1 | 29 | 9 h 50 min |
| December | 34°F | 13°F | 23.2°F | – | <1 | 31 | 9 h 10 min |
| Year (annual) | 54°F | 28°F | 40.6°F | – | <1 | 225 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 1°C | −11°C | −4.9°C |
| February | 2°C | −11°C | −4.5°C |
| March | 6°C | −8°C | −0.8°C |
| April | 10°C | −5°C | 2.7°C |
| May | 16°C | 0°C | 7.8°C |
| June | 22°C | 5°C | 13.4°C |
| July | 25°C | 9°C | 16.9°C |
| August | 24°C | 8°C | 15.7°C |
| September | 20°C | 4°C | 11.8°C |
| October | 13°C | −2°C | 5.3°C |
| November | 6°C | −8°C | −0.9°C |
| December | 1°C | −11°C | −4.9°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Hohnholz Ranch (25 miles away), gets 98 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00481610; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Centennial?
Normal highs sit between 65°F and 85°F in June, July, August and September.
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00481610.
When is the last frost in Centennial?
In Centennial, the last spring frost (32°F) comes after June 2 in half of years and after June 20 in one year in ten; the first autumn frost comes before September 19 in half of years and before September 3 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- June 21 year in 10 after June 20; 9 in 10 after May 22
- First autumn frost, half of years before
- September 191 year in 10 before September 3; 9 in 10 before October 2
NOAA puts the median frost-free season at 106 days, and the season without a hard freeze (28°F) at 128 days.
A hard freeze (28°F) comes after May 23 in half of springs and before September 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Centennial in zone 5a in ZIP code 82055.
Frost dates for every NOAA station in Wyoming · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00481610; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Centennial?
In a normal year in Centennial, a 90°F day is rare and 225 nights fall to 32°F or colder.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 225a normal year
- Days that stay below freezing
- 48high of 32°F or less
The highest temperature in this station's record (since 1899) is 95°F, on July 12, 1954; the lowest is −45°F, on January 12, 1963.
The wettest calendar year on that record is 1930, with 20.58 in; the snowiest season is 1978–79, with 195.9 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00481610; records: ACIS (NOAA Regional Climate Centers), station USC00481610. Records use complete months only; a month missing more than three days is left out.
How sunny is Centennial?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Centennial, 4.7 kWh per square metre a day. July is the sunniest month (83%) and December the cloudiest (69%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 74% | 2.3 |
| February | 74% | 3.2 |
| March | 75% | 4.5 |
| April | 71% | 5.4 |
| May | 74% | 6.4 |
| June | 83% | 7.5 |
| July | 83% | 7.2 |
| August | 82% | 6.3 |
| September | 83% | 5.2 |
| October | 77% | 3.6 |
| November | 73% | 2.4 |
| December | 69% | 1.9 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Centennial need?
A normal year in Centennial brings 8,903 heating degree days, 66% more than the median U.S. place (5,373), and 41 cooling degree days, 96% fewer than the median (908). Nine months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,108 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,296 | 0 |
| February | 1,151 | 0 |
| March | 1,068 | 0 |
| April | 844 | 0 |
| May | 588 | 0 |
| June | 272 | 5 |
| July | 106 | 24 |
| August | 158 | 11 |
| September | 357 | 1 |
| October | 725 | 0 |
| November | 1,042 | 0 |
| December | 1,296 | 0 |
| Year (annual) | 8,903 | 41 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00481610. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Centennial's climate compare?
Centennial is warmer than 16 of the other 70 places with their own NOAA record in Wyoming. Across the 7,247 U.S. stations with normals, its annual mean of 40.6°F is warmer than 7%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Centennial share this climate record?
Ryan Park has no NOAA station with 1991-2020 normals of its own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Ryan Park, WY29 people · 19 mi W
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Centennial's climate
What is the coldest month in Centennial?
January, with a normal high of 34°F and a normal low of 12°F. The warmest is July (77°F by day, 48°F at night).
Does it snow in Centennial?
Yes. NOAA publishes no 1991-2020 snowfall normal for Centennial's NOAA station; the nearest record that keeps one, Hohnholz Ranch (25 miles away), records 98 inches of snow in a normal year.
What plant hardiness zone is Centennial in?
The USDA's 2023 map puts Centennial in zone 5a in ZIP code 82055.
How late can frost come in Centennial?
In half of years the last 32°F night comes after June 2; in one year in ten it comes after June 20. Waiting until June 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wyoming climateThe statewide normals and every place in the state
- Laramie, WY24 miles from this station, 41.4°F a year
- Hohnholz Ranch, CO25 miles from this station, 39.1°F a year
- Elk Mountain, WY30 miles from this station, 43.3°F a year
- Saratoga, WY36 miles from this station, 43.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made