Photo: Jeffrey Beall · CC BY 3.0Less rain and snow falls on Carpenter than on 93% of U.S. towns: 15 inches a year
The warmest part of a July day comes in at 88° on average. By January nights alone, it runs colder than 84% of U.S. towns. March has warmed most since 1901–2000, part of a 1.8° rise. Garden planting can start around May 14; autumn frost returns near September 26.
A year in Carpenter at a glance
Each month’s typical high and low, and what it brings.
What stands out about Carpenter’s climate
Compared with towns across the U.S., with Carpenter’s place in Wyoming beside it.
What a year in Carpenter feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 133 frost-free days a year
In half of years the last 32° night comes by May 14 and the first by September 26. Frost and day counts come from NOAA’s station at Carpenter 3n, WY, 2.8 miles from the town’s center, at about the same height.
The 2023 USDA map puts Carpenter’s center in zone 5b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −15°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 35 inches of snow a winter
Snow, measured at Carpenter 3n, WY, falls mostly in March. Precipitation (rain plus melted snow) adds up to 15 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 82 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Carpenter
94% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Carpenter 3n, WY.
Living with Carpenter’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
133 frost-free days in zone 5b. The last frost comes by May 14 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 26.
Months with highs of 62–84° and lows of 40° or more: June and September.
Parks & trails →Of the yearly building losses FEMA expects in Carpenter from natural hazards, river flooding is the largest share (33%); heat waves, cold waves, winter storms and ice storms together are 26%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Carpenter and similar climates
TownRatings has no climate map of the towns around Carpenter yet.
Climates most like Carpenter’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 |
|---|---|---|---|---|
| Carpenter, WY | 15° | 88° | 15" | 35" |
| Lockwood, MT | 15° | 88° | 15" | 35" |
| Glenwood Springs, CO | 14° | 87° | 15" | 39" |
| Spring Creek, NV | 15° | 89° | 14" | 41" |
| Chubbuck, ID | 17° | 88° | 12" | 39" |
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 Carpenter averaged 1.8° warmer than the 1900s. The biggest change is in March (+4.1°).
A bigger shift than in 80% 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 Carpenter compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Carpenter’s place among Wyoming’s.
Carpenter weather by month
Highs, lows and precipitation from NOAA’s grid at Carpenter’s center; snow, wet days and snow on the ground from Carpenter 3n, WY. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 42° | 15° | 0.3" | 4.3" | 5 | 6 | 21° – 35° |
| February | 43° | 16° | 0.4" | 5.4" | 4 | 7 | 22° – 37° |
| March | 53° | 23° | 0.8" | 6.7" | 6 | 4 | 31° – 45° |
| April | 59° | 29° | 1.5" | 4.6" | 8 | 1 | 38° – 50° |
| May | 68° | 39° | 2.5" | 0.8" | 10 | 0 | 47° – 58° |
| June | 81° | 48° | 2.4" | 0.0" | 11 | 0 | 59° – 70° |
| July | 88° | 55° | 2.3" | 0.0" | 9 | 0 | 66° – 75° |
| August | 86° | 52° | 1.6" | 0.0" | 9 | 0 | 65° – 73° |
| September | 77° | 44° | 1.4" | 0.4" | 7 | 0 | 55° – 65° |
| October | 63° | 32° | 1.0" | 2.8" | 6 | 1 | 39° – 53° |
| November | 50° | 22° | 0.5" | 6.0" | 4 | 5 | 26° – 43° |
| December | 41° | 15° | 0.3" | 3.5" | 3 | 8 | 20° – 32° |
| Year | 62° | 32° | 14.9" | 34.5" | 82 | 32 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 26° to 43°. August is the most reliable, staying within 8°.
Where Carpenter’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 Carpenter’s center.
- Snow: Carpenter 3n, WY.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Carpenter 3n, WY, 2.8 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 Carpenter’s climate
What is the weather like in Carpenter?
A typical July afternoon reaches 88°, a January night drops to 15°, and about 35 inches of snow falls in a normal winter. Colder January nights than 84% of U.S. towns; hotter July afternoons than 65% of U.S. towns.
How cold does it get in Carpenter in winter?
December nights average 15°. About 176 nights a year reach 32° or below and 8 reach 0° or below. In the coldest December of the last 30 years the month averaged 20°.
How much snow does Carpenter get?
About 35 inches in a normal winter at Carpenter 3n, WY, most of it in March, with snow on the ground about 32 days a year.
How hot does it get in Carpenter?
July, with a typical high of 88° and a low of 55°. About 27 days a year reach 90° (Carpenter 3n, WY).
When is the first and last frost in Carpenter?
In half of years the last spring frost (32°) comes by May 14 and the first fall frost by September 26, about 133 frost-free days, at Carpenter 3n, WY.
What growing zone is Carpenter in?
Zone 5b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −15°.
What is the best time of year to visit Carpenter?
By one simple rule (highs of 62–84° and lows of 40° or more), June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Carpenter getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 80% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Carpenter.
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.