Wamsutter, Wyoming climate: Normal weather by month, frost dates and records
Wamsutter's normal year runs from 9°F January nights to 85°F July afternoons, with 8.4 inches of precipitation and 51 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 5.7°C, January lows of −13°C, July highs of 30°C, 215 mm of precipitation a year.
- NOAA stationWamsutter
- Station IDUSC00489459
- Location41.67°N 107.98°W
- Elevation6,740 ft (2,054 m)
- Population197
On October 23, the normal high in Wamsutter is 55°F and the normal low 27°F, and the chance of measurable rain or snow is 14%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Wamsutter.
- Jan 30° 9°
- Feb 33° 11°
- Mar 45° 21°
- Apr 55° 27°
- May 65° 35°
- Jun 77° 43°
- Jul 85° 50°
- Aug 83° 48°
- Sep 73° 39°
- Oct 58° 29°
- Nov 42° 18°
- Dec 30° 9°
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 Wamsutter each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 9°F. The most precipitation falls in May (1.35 in), the least in February (0.40 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 30°F | 9°F | 19.0°F | 0.43 | 7.8 | 5 | <1 | 31 | 9 h 30 min |
| February | 33°F | 11°F | 22.3°F | 0.40 | 7.6 | 5 | <1 | 28 | 10 h 30 min |
| March | 45°F | 21°F | 33.1°F | 0.48 | 7.2 | 5 | <1 | 29 | 11 h 50 min |
| April | 55°F | 27°F | 40.6°F | 0.76 | 6.1 | 7 | <1 | 24 | 13 h 20 min |
| May | 65°F | 35°F | 49.9°F | 1.35 | 2.5 | 7 | <1 | 12 | 14 h 30 min |
| June | 77°F | 43°F | 59.9°F | 0.81 | 0.1 | 5 | 1 | 2 | 15 h 10 min |
| July | 85°F | 50°F | 67.6°F | 0.67 | 0.0 | 4 | 5 | <1 | 15 h |
| August | 83°F | 48°F | 65.3°F | 0.72 | 0.0 | 5 | 2 | <1 | 13 h 50 min |
| September | 73°F | 39°F | 56.0°F | 0.90 | 0.7 | 5 | <1 | 5 | 12 h 30 min |
| October | 58°F | 29°F | 43.6°F | 0.76 | 3.0 | 4 | <1 | 20 | 11 h 10 min |
| November | 42°F | 18°F | 30.3°F | 0.64 | 7.0 | 5 | <1 | 28 | 9 h 50 min |
| December | 30°F | 9°F | 19.5°F | 0.53 | 8.8 | 5 | <1 | 31 | 9 h 10 min |
| Year (annual) | 56°F | 28°F | 42.3°F | 8.45 | 50.8 | 61 | 9 | 209 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −1°C | −13°C | −7.2°C | 11 mm | 20 cm |
| February | 1°C | −11°C | −5.4°C | 10 mm | 19 cm |
| March | 7°C | −6°C | 0.6°C | 12 mm | 18 cm |
| April | 13°C | −3°C | 4.8°C | 19 mm | 15 cm |
| May | 18°C | 2°C | 9.9°C | 34 mm | 6 cm |
| June | 25°C | 6°C | 15.5°C | 21 mm | 0 cm |
| July | 30°C | 10°C | 19.8°C | 17 mm | 0 cm |
| August | 28°C | 9°C | 18.5°C | 18 mm | 0 cm |
| September | 23°C | 4°C | 13.3°C | 23 mm | 2 cm |
| October | 15°C | −2°C | 6.4°C | 19 mm | 8 cm |
| November | 6°C | −8°C | −0.9°C | 16 mm | 18 cm |
| December | −1°C | −13°C | −6.9°C | 13 mm | 22 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00489459; 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 Wamsutter?
Normal highs sit between 65°F and 85°F in May, June, August and September. Of those, June has the fewest days with rain (5).
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 USC00489459.
When is the last frost in Wamsutter?
In Wamsutter, the last spring frost (32°F) comes after June 5 in half of years and after June 23 in one year in ten; the first autumn frost comes before September 14 in half of years and before September 1 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 51 year in 10 after June 23; 9 in 10 after May 20
- First autumn frost, half of years before
- September 141 year in 10 before September 1; 9 in 10 before September 28
NOAA puts the median frost-free season at 101 days, and the season without a hard freeze (28°F) at 126 days.
A hard freeze (28°F) comes after May 20 in half of springs and before September 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Wamsutter in zone 4b in ZIP code 82336, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Wamsutter's NOAA station is in zone 4b: the coldest night of a typical year reaches −22°F (16 complete years).
Frost dates for every NOAA station in Wyoming · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00489459; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 Wamsutter?
In a normal year in Wamsutter, 9 days a year reach 90°F, 209 nights fall to 32°F or colder and 61 days bring measurable precipitation.
- Days at 90°F or more
- 9a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 209a normal year
- Days that stay below freezing
- 60high of 32°F or less
- Days with 0.01 inch of precipitation
- 61a normal year
- Days with 1 inch of snow or more
- 19a normal year
The highest temperature in this station's record (since 1897) is 105°F, on July 28, 1897; the lowest is −40°F, on January 1, 1979.
The wettest calendar year on that record is 2015, with 13.05 in; the snowiest season is 2022–23, with 114.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00489459; records: ACIS (NOAA Regional Climate Centers), station USC00489459. Records use complete months only; a month missing more than three days is left out.
How sunny is Wamsutter?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Wamsutter, 4.7 kWh per square metre a day. July is the sunniest month (86%) and December the cloudiest (68%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 73% | 2.3 |
| February | 72% | 3.1 |
| March | 73% | 4.4 |
| April | 74% | 5.6 |
| May | 77% | 6.7 |
| June | 85% | 7.7 |
| July | 86% | 7.4 |
| August | 86% | 6.5 |
| September | 85% | 5.3 |
| October | 79% | 3.7 |
| November | 73% | 2.4 |
| December | 68% | 1.8 |
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 Wamsutter need?
A normal year in Wamsutter brings 8,458 heating degree days, 57% more than the median U.S. place (5,373), and 204 cooling degree days, 78% 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 1,680 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,424 | 0 |
| February | 1,194 | 0 |
| March | 991 | 0 |
| April | 732 | 0 |
| May | 467 | 0 |
| June | 174 | 21 |
| July | 29 | 110 |
| August | 57 | 68 |
| September | 276 | 5 |
| October | 662 | 0 |
| November | 1,041 | 0 |
| December | 1,410 | 0 |
| Year (annual) | 8,458 | 204 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00489459. 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.
Has Wamsutter been warmer than normal lately?
2025 averaged 45.1°F, 2.8°F above the 1991-2020 normal of 42.3°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 43.7°F | +1.4°F | 8.63 | 64.2 |
| 2022 | 41.5°F | −0.8°F | 10.80 | 95.8 |
| 2023 | 40.2°F | −2.1°F | 11.92 | 86.5 |
| 2024 | 44.4°F | +2.1°F | 8.04 | 63.5 |
| 2025 | 45.1°F | +2.8°F | 7.38 | 40.5 |
Over 41 complete years from 1951 to 2025, the station's annual mean temperature rose at a fitted 3.1°F per century (+0.17°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00489459; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Wamsutter's climate compare?
Wamsutter is warmer than 21 of the other 70 places with their own NOAA record in Wyoming, and wetter than 11. Across the 7,247 U.S. stations with normals, its annual mean of 42.3°F is warmer than 10%.
In the Köppen classification computed from these normals, Wamsutter 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.
Questions about Wamsutter's climate
What is the coldest month in Wamsutter?
January, with a normal high of 30°F and a normal low of 9°F. The warmest is July (85°F by day, 50°F at night).
Does it snow in Wamsutter?
Yes: 51 inches in a normal year, falling on 24 days with 0.1 inch or more, the most in December (8.8 inches).
What is the rainiest month in Wamsutter?
May, with 1.35 in of precipitation in a normal year; the driest is February with 0.40 in.
What plant hardiness zone is Wamsutter in?
The USDA's 2023 map puts Wamsutter in zone 4b in ZIP code 82336, the nearest ZIP area. By the same method at Wamsutter's NOAA station, the coldest night of a typical year reaches −22°F (16 years, 1991-2020): zone 4b.
How late can frost come in Wamsutter?
In half of years the last 32°F night comes after June 5; in one year in ten it comes after June 23. Waiting until June 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wyoming climateThe statewide normals and every place in the state
- Bitter Creek (4 mi NE), WY28 miles from this station, 43.7°F a year
- Rawlins, WY41 miles from this station, 43.1°F a year
- Baggs, WY47 miles from this station, 43.7°F a year
- Muddy Gap, WY55 miles from this station, 45.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made