Photo: Jeffrey Beall · CC BY 3.0Centennial gets about 98 inches of snow a winter, more than 97% of U.S. towns
In July the day’s top temperature is typically 76°. Only 66° separates winter nights from summer afternoons. Summers stay cool: July afternoons here are cooler than in 98% of U.S. towns. The heating season runs October to May: each of those months averages under 50°.
A year in Centennial at a glance
Each month’s typical high and low, and what it brings.
What stands out about Centennial’s climate
Compared with towns across the U.S., with Centennial’s place in Wyoming beside it.
What a year in Centennial feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 106 frost-free days a year
In half of years the last 32° night comes by June 2 and the first by September 19. Frost and day counts come from NOAA’s station at Centennial 1ne, WY, 0.6 miles from the town’s center, at about the same height.
The 2023 USDA map puts Centennial’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −19°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
About 98 inches of snow a winter
Snow, measured at Hohnholz Rch, CO, falls mostly in April. Precipitation (rain plus melted snow) adds up to 16 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 107 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Centennial
Nearly all of the work is heating: a normal year has almost no cooling days. Months averaging under 55° run from September through June.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Centennial 1ne, WY.
Living with Centennial’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
106 frost-free days in zone 5a. The last frost comes by Jun 2 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 19.
Months with highs of 62–84° and lows of 40° or more: July and August. 3.4 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Centennial from natural hazards, river flooding is the largest share (47%); heat waves, cold waves, winter storms and ice storms together are 12%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Centennial and similar climates
TownRatings has no climate map of the towns around Centennial yet.
Climates most like Centennial’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Centennial, WY | 10° | 76° | 16" | 98" |
| Woodland Park, CO | 11° | 77° | 22" | 134" |
| Marquette, MI | 11° | 76° | 32" | 102" |
| Lewistown, MT | 12° | 82° | 18" | 112" |
| Ashland, WI | 6° | 78° | 31" | 74" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
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°).
A bigger shift than in 87% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Centennial compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Centennial’s place among Wyoming’s.
Centennial weather by month
Highs, lows and precipitation from NOAA’s grid at Centennial’s center; snow, wet days and snow on the ground from Hohnholz Rch, CO. 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" | 0.0" | 10 | 0 | 55° – 64° |
| August | 74° | 43° | 1.2" | 0.0" | 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 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 19° to 36°. August is the most reliable, staying within 9°.
Where Centennial’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Centennial’s center.
- Snow: Hohnholz Rch, CO.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Centennial 1ne, WY, 0.6 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Centennial’s climate
What is the weather like in Centennial?
A typical July afternoon reaches 76°, a January night drops to 10°, and about 98 inches of snow falls in a normal winter. Colder January nights than 94% of U.S. towns; cooler July afternoons than 98% of U.S. towns.
How cold does it get in Centennial in winter?
January nights average 10°. About 225 nights a year reach 32° or below and 16 reach 0° or below. In the coldest January of the last 30 years the month averaged 15°.
How much snow does Centennial get?
About 98 inches in a normal winter at Hohnholz Rch, CO, most of it in April, with snow on the ground about 132 days a year.
How hot does it get in Centennial?
July, with a typical high of 76°. 90° days are rare: none in a normal year at Centennial 1ne, WY.
When is the first and last frost in Centennial?
In half of years the last spring frost (32°) comes by June 2 and the first fall frost by September 19, about 106 frost-free days, at Centennial 1ne, WY.
What growing zone is Centennial in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −19°.
What is the best time of year to visit Centennial?
By one simple rule (highs of 62–84° and lows of 40° or more), July and August. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Centennial getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 87% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Centennial.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.