Carpenter, Wyoming climate: Normal weather by month, frost dates and records
Carpenter's normal year runs from 13°F January nights to 87°F July afternoons, with 15.3 inches of precipitation and 35 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.3°C, January lows of −10°C, July highs of 30°C, 390 mm of precipitation a year.
- NOAA stationCarpenter (3 mi N)
- Station IDUSC00481547
- Location41.08°N 104.38°W
- Elevation5,437 ft (1,657 m)
- From the center3 miles
- Population (census place)0
On October 22, the normal high in Carpenter is 61°F and the normal low 30°F, and the chance of measurable rain or snow is 19%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Carpenter.
- Jan 40° 13°
- Feb 42° 14°
- Mar 52° 21°
- Apr 59° 30°
- May 68° 40°
- Jun 81° 48°
- Jul 87° 55°
- Aug 85° 53°
- Sep 77° 43°
- Oct 63° 33°
- Nov 49° 21°
- Dec 41° 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 Carpenter each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 13°F. The most precipitation falls in May (2.42 in), the least in January (0.25 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 40°F | 13°F | 26.7°F | 0.25 | 4.3 | 5 | <1 | 30 | 9 h 30 min |
| February | 42°F | 14°F | 28.1°F | 0.39 | 5.4 | 4 | <1 | 27 | 10 h 40 min |
| March | 52°F | 21°F | 36.5°F | 0.79 | 6.7 | 6 | <1 | 27 | 11 h 50 min |
| April | 59°F | 30°F | 44.2°F | 1.44 | 4.6 | 8 | <1 | 17 | 13 h 20 min |
| May | 68°F | 40°F | 53.9°F | 2.42 | 0.8 | 10 | 1 | 5 | 14 h 30 min |
| June | 81°F | 48°F | 64.6°F | 2.10 | 0.0 | 11 | 5 | <1 | 15 h 10 min |
| July | 87°F | 55°F | 70.9°F | 2.21 | 0.0 | 9 | 12 | <1 | 14 h 50 min |
| August | 85°F | 53°F | 68.6°F | 1.88 | 0.0 | 9 | 7 | <1 | 13 h 50 min |
| September | 77°F | 43°F | 59.8°F | 1.87 | 0.4 | 7 | 2 | 2 | 12 h 30 min |
| October | 63°F | 33°F | 47.9°F | 1.12 | 2.8 | 6 | <1 | 13 | 11 h 10 min |
| November | 49°F | 21°F | 35.0°F | 0.47 | 6.0 | 4 | <1 | 26 | 10 h |
| December | 41°F | 13°F | 26.8°F | 0.40 | 3.5 | 3 | <1 | 30 | 9 h 10 min |
| Year (annual) | 62°F | 32°F | 46.9°F | 15.34 | 34.5 | 82 | 27 | 176 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 5°C | −10°C | −2.9°C | 6 mm | 11 cm |
| February | 6°C | −10°C | −2.2°C | 10 mm | 14 cm |
| March | 11°C | −6°C | 2.5°C | 20 mm | 17 cm |
| April | 15°C | −1°C | 6.8°C | 37 mm | 12 cm |
| May | 20°C | 4°C | 12.2°C | 61 mm | 2 cm |
| June | 27°C | 9°C | 18.1°C | 53 mm | 0 cm |
| July | 30°C | 13°C | 21.6°C | 56 mm | 0 cm |
| August | 29°C | 11°C | 20.3°C | 48 mm | 0 cm |
| September | 25°C | 6°C | 15.4°C | 47 mm | 1 cm |
| October | 17°C | 0°C | 8.8°C | 28 mm | 7 cm |
| November | 10°C | −6°C | 1.7°C | 12 mm | 15 cm |
| December | 5°C | −11°C | −2.9°C | 10 mm | 9 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00481547; 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 Carpenter?
Normal highs sit between 65°F and 85°F in May, June, August and September. Of those, September has the fewest days with rain (7).
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 USC00481547.
When is the last frost in Carpenter?
In Carpenter, the last spring frost (32°F) comes after May 14 in half of years and after May 27 in one year in ten; the first autumn frost comes before September 26 in half of years and before September 12 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
- May 141 year in 10 after May 27; 9 in 10 after May 4
- First autumn frost, half of years before
- September 261 year in 10 before September 12; 9 in 10 before October 8
NOAA puts the median frost-free season at 133 days, and the season without a hard freeze (28°F) at 152 days.
A hard freeze (28°F) comes after May 3 in half of springs and before October 4 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Carpenter in zone 5b in ZIP code 82054, the nearest ZIP area.
Frost dates for every NOAA station in Wyoming · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00481547; 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 Carpenter?
In a normal year in Carpenter, 27 days a year reach 90°F, 176 nights fall to 32°F or colder and 82 days bring measurable precipitation.
- Days at 90°F or more
- 27a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 176a normal year
- Days that stay below freezing
- 24high of 32°F or less
- Days with 0.01 inch of precipitation
- 82a normal year
- Days with 1 inch of snow or more
- 14a normal year
The highest temperature in this station's record (since 1948) is 104°F, on July 19, 1964; the lowest is −31°F, on December 22, 1990.
The wettest calendar year on that record is 1999, with 20.11 in; the snowiest season is 1979–80, with 74.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00481547; records: ACIS (NOAA Regional Climate Centers), station USC00481547. Records use complete months only; a month missing more than three days is left out.
How sunny is Carpenter?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Carpenter, 4.6 kWh per square metre a day. August is the sunniest month (83%) and April the cloudiest (72%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 2.3 |
| February | 75% | 3.2 |
| March | 76% | 4.5 |
| April | 72% | 5.4 |
| May | 73% | 6.1 |
| June | 81% | 7.1 |
| July | 83% | 6.9 |
| August | 83% | 6.1 |
| September | 83% | 5.0 |
| October | 78% | 3.6 |
| November | 78% | 2.5 |
| December | 75% | 2.0 |
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 Carpenter need?
A normal year in Carpenter brings 6,994 heating degree days, 30% more than the median U.S. place (5,373), and 437 cooling degree days, 52% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,281 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,187 | 0 |
| February | 1,034 | 0 |
| March | 882 | 0 |
| April | 623 | 0 |
| May | 348 | 5 |
| June | 87 | 75 |
| July | 12 | 194 |
| August | 24 | 137 |
| September | 183 | 25 |
| October | 531 | 0 |
| November | 901 | 0 |
| December | 1,182 | 0 |
| Year (annual) | 6,994 | 437 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00481547. 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 Carpenter's climate compare?
Carpenter is warmer than 57 of the other 70 places with their own NOAA record in Wyoming, and wetter than 46. Across the 7,247 U.S. stations with normals, its annual mean of 46.9°F is warmer than 27%.
In the Köppen classification computed from these normals, Carpenter is BSk: cold semi-arid steppe. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Carpenter share this climate record?
3 places have no NOAA station with 1991-2020 normals of their 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.
- Burns, WY379 people · 7 mi N
- Grover, CO152 people · 17 mi SE
- Hillsdale, WY49 people · 10 mi NW
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 Carpenter's climate
What is the coldest month in Carpenter?
January, with a normal high of 40°F and a normal low of 13°F. The warmest is July (87°F by day, 55°F at night).
Does it snow in Carpenter?
Yes: 35 inches in a normal year, falling on 19 days with 0.1 inch or more, the most in March (6.7 inches).
What is the rainiest month in Carpenter?
May, with 2.42 in of precipitation in a normal year; the driest is January with 0.25 in.
What plant hardiness zone is Carpenter in?
The USDA's 2023 map puts Carpenter in zone 5b in ZIP code 82054, the nearest ZIP area.
How late can frost come in Carpenter?
In half of years the last 32°F night comes after May 14; in one year in ten it comes after May 27. Waiting until May 27 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wyoming climateThe statewide normals and every place in the state
- Archer, WY16 miles from this station, 46.7°F a year
- Pine Bluffs, WY18 miles from this station, 48.2°F a year
- Cheyenne, WY23 miles from this station, 46.9°F a year
- Albin, WY26 miles from this station, 48.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made