Shoshoni, Wyoming climate: Normal weather by month, frost dates and records
Shoshoni's normal year runs from 1°F January nights to 90°F July afternoons, with 8.0 inches of precipitation and 18 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.6°C, January lows of −17°C, July highs of 32°C, 203 mm of precipitation a year.
- NOAA stationShoshoni
- Station IDUSC00488209
- Location43.24°N 108.11°W
- Elevation4,837 ft (1,474 m)
- Population500
On October 23, the normal high in Shoshoni is 57°F and the normal low 29°F, and the chance of measurable rain or snow is 8%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Shoshoni.
- Jan 28° 1°
- Feb 36° 11°
- Mar 53° 24°
- Apr 62° 33°
- May 70° 42°
- Jun 82° 50°
- Jul 90° 58°
- Aug 88° 55°
- Sep 77° 46°
- Oct 61° 32°
- Nov 43° 20°
- Dec 29° 5°
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 Shoshoni each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 1°F. The most precipitation falls in May (1.84 in), the least in December (0.18 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 28°F | 1°F | 14.5°F | 0.23 | 3.2 | 1 | <1 | 31 | 9 h 20 min |
| February | 36°F | 11°F | 23.8°F | 0.37 | 3.5 | 2 | <1 | 28 | 10 h 30 min |
| March | 53°F | 24°F | 38.4°F | 0.34 | 2.5 | 2 | <1 | 26 | 11 h 50 min |
| April | 62°F | 33°F | 47.5°F | 1.03 | 1.7 | 5 | <1 | 15 | 13 h 20 min |
| May | 70°F | 42°F | 56.0°F | 1.84 | 0.4 | 7 | 1 | 3 | 14 h 40 min |
| June | 82°F | 50°F | 66.1°F | 1.01 | 0.0 | 5 | 8 | <1 | 15 h 20 min |
| July | 90°F | 58°F | 73.9°F | 0.76 | 0.0 | 3 | 20 | <1 | 15 h 10 min |
| August | 88°F | 55°F | 71.4°F | 0.48 | 0.0 | 3 | 15 | <1 | 14 h |
| September | 77°F | 46°F | 61.4°F | 0.86 | 0.1 | 4 | 2 | 1 | 12 h 30 min |
| October | 61°F | 32°F | 46.4°F | 0.59 | 1.0 | 3 | <1 | 15 | 11 h 10 min |
| November | 43°F | 20°F | 31.3°F | 0.30 | 2.2 | 2 | <1 | 27 | 9 h 50 min |
| December | 29°F | 5°F | 16.8°F | 0.18 | 2.9 | 1 | <1 | 31 | 9 h |
| Year (annual) | 60°F | 31°F | 45.6°F | 7.99 | 17.5 | 39 | 46 | 176 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −2°C | −17°C | −9.7°C | 6 mm | 8 cm |
| February | 2°C | −11°C | −4.6°C | 9 mm | 9 cm |
| March | 12°C | −4°C | 3.6°C | 9 mm | 6 cm |
| April | 17°C | 0°C | 8.6°C | 26 mm | 4 cm |
| May | 21°C | 5°C | 13.3°C | 47 mm | 1 cm |
| June | 28°C | 10°C | 18.9°C | 26 mm | 0 cm |
| July | 32°C | 14°C | 23.3°C | 19 mm | 0 cm |
| August | 31°C | 13°C | 21.9°C | 12 mm | 0 cm |
| September | 25°C | 8°C | 16.3°C | 22 mm | 0 cm |
| October | 16°C | 0°C | 8.0°C | 15 mm | 3 cm |
| November | 6°C | −7°C | −0.4°C | 8 mm | 6 cm |
| December | −2°C | −15°C | −8.4°C | 5 mm | 7 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00488209; 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 Shoshoni?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September has the fewest days with rain (4).
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 USC00488209.
When is the last frost in Shoshoni?
In Shoshoni, the last spring frost (32°F) comes after May 7 in half of years and after May 18 in one year in ten; the first autumn frost comes before October 3 in half of years and before September 23 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 71 year in 10 after May 18; 9 in 10 after April 27
- First autumn frost, half of years before
- October 31 year in 10 before September 23; 9 in 10 before October 15
NOAA puts the median frost-free season at 145 days, and the season without a hard freeze (28°F) at 165 days.
A hard freeze (28°F) comes after April 28 in half of springs and before October 11 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Shoshoni in zone 4b in ZIP code 82649, 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 USC00488209; 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 Shoshoni?
In a normal year in Shoshoni, 46 days a year reach 90°F (1 of them 100°F or more), 176 nights fall to 32°F or colder and 39 days bring measurable precipitation.
- Days at 90°F or more
- 46a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 176a normal year
- Days that stay below freezing
- 56high of 32°F or less
- Days with 0.01 inch of precipitation
- 39a normal year
- Days with 1 inch of snow or more
- 7a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00488209.
How sunny is Shoshoni?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Shoshoni, 4.6 kWh per square metre a day. July is the sunniest month (87%) and December the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 2.1 |
| February | 77% | 3.1 |
| March | 76% | 4.3 |
| April | 75% | 5.5 |
| May | 76% | 6.4 |
| June | 84% | 7.5 |
| July | 87% | 7.3 |
| August | 86% | 6.4 |
| September | 85% | 5.1 |
| October | 78% | 3.4 |
| November | 76% | 2.3 |
| December | 71% | 1.7 |
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 Shoshoni need?
A normal year in Shoshoni brings 7,670 heating degree days, 43% more than the median U.S. place (5,373), and 641 cooling degree days, 29% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,592 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,563 | 0 |
| February | 1,153 | 0 |
| March | 825 | 0 |
| April | 527 | 0 |
| May | 293 | 12 |
| June | 64 | 99 |
| July | 3 | 278 |
| August | 13 | 210 |
| September | 148 | 41 |
| October | 576 | 1 |
| November | 1,011 | 0 |
| December | 1,493 | 0 |
| Year (annual) | 7,670 | 641 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00488209. 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 Shoshoni been warmer than normal lately?
2025 averaged 47.8°F, 2.2°F above the 1991-2020 normal of 45.6°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 47.9°F | +2.3°F | 6.49 | 22.4 |
| 2022 | 44.9°F | −0.7°F | 8.60 | 33.8 |
| 2023 | 41.6°F | −4.0°F | 15.34 | 48.6 |
| 2024 | 47.5°F | +1.9°F | 4.88 | 18.6 |
| 2025 | 47.8°F | +2.2°F | 5.41 | 14.8 |
Source: observed years: ACIS, station USC00488209. A year counts only with all twelve months complete.
How does Shoshoni's climate compare?
Shoshoni is warmer than 49 of the other 70 places with their own NOAA record in Wyoming, and wetter than 10. Across the 7,247 U.S. stations with normals, its annual mean of 45.6°F is warmer than 22%.
In the Köppen classification computed from these normals, Shoshoni is BWk: cold desert. 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 Shoshoni's climate
What is the coldest month in Shoshoni?
January, with a normal high of 28°F and a normal low of 1°F. The warmest is July (90°F by day, 58°F at night).
Does it snow in Shoshoni?
Yes: 18 inches in a normal year, falling on 11 days with 0.1 inch or more, the most in February (3.5 inches).
What is the rainiest month in Shoshoni?
May, with 1.84 in of precipitation in a normal year; the driest is December with 0.18 in.
What plant hardiness zone is Shoshoni in?
The USDA's 2023 map puts Shoshoni in zone 4b in ZIP code 82649, the nearest ZIP area.
How late can frost come in Shoshoni?
In half of years the last 32°F night comes after May 7; in one year in ten it comes after May 18. Waiting until May 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wyoming climateThe statewide normals and every place in the state
- Boysen Dam, WY12 miles from this station, 46.4°F a year
- Riverton, WY22 miles from this station, 44.5°F a year
- Thermopolis, WY29 miles from this station, 48.6°F a year
- Pavillion, WY29 miles from this station, 45.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made