South Pass City, Wyoming climate: Climate normals at a NOAA weather station
South Pass City's normal year runs from 2°F January nights to 78°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 2.1°C, January lows of −16°C, July highs of 25°C.
- NOAA stationSouth Pass City
- Station IDUSC00488385
- Location42.47°N 108.80°W
- Elevation7,840 ft (2,390 m)
On October 23, the normal high in South Pass City is 49°F and the normal low 21°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for South Pass City.
- Jan 28° 2°
- Feb 29° 4°
- Mar 38° 12°
- Apr 47° 19°
- May 59° 28°
- Jun 70° 35°
- Jul 78° 41°
- Aug 77° 38°
- Sep 67° 31°
- Oct 53° 23°
- Nov 37° 12°
- Dec 28° 3°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at South Pass City each month?
July is the warmest month, with normal highs of 78°F; January the coldest, with normal lows of 2°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 28°F | 2°F | 15.2°F | – | <1 | 31 | 9 h 20 min |
| February | 29°F | 4°F | 16.7°F | – | <1 | 28 | 10 h 30 min |
| March | 38°F | 12°F | 25.3°F | – | <1 | 31 | 11 h 50 min |
| April | 47°F | 19°F | 33.4°F | – | <1 | 29 | 13 h 20 min |
| May | 59°F | 28°F | 43.3°F | – | <1 | 23 | 14 h 30 min |
| June | 70°F | 35°F | 52.2°F | – | <1 | 12 | 15 h 20 min |
| July | 78°F | 41°F | 59.2°F | – | <1 | 3 | 15 h |
| August | 77°F | 38°F | 57.5°F | – | <1 | 5 | 14 h |
| September | 67°F | 31°F | 49.1°F | – | <1 | 18 | 12 h 30 min |
| October | 53°F | 23°F | 37.6°F | – | <1 | 28 | 11 h 10 min |
| November | 37°F | 12°F | 24.4°F | – | <1 | 30 | 9 h 50 min |
| December | 28°F | 3°F | 15.4°F | – | <1 | 31 | 9 h 10 min |
| Year (annual) | 51°F | 21°F | 35.8°F | – | <1 | 267 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | −2°C | −16°C | −9.3°C |
| February | −2°C | −15°C | −8.5°C |
| March | 3°C | −11°C | −3.7°C |
| April | 9°C | −7°C | 0.8°C |
| May | 15°C | −2°C | 6.3°C |
| June | 21°C | 2°C | 11.2°C |
| July | 25°C | 5°C | 15.1°C |
| August | 25°C | 4°C | 14.2°C |
| September | 20°C | −1°C | 9.5°C |
| October | 12°C | −5°C | 3.1°C |
| November | 3°C | −11°C | −4.2°C |
| December | −2°C | −16°C | −9.2°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Lander (24 miles away), gets 88 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00488385; 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.
Which months are mildest at South Pass City?
Normal highs sit between 65°F and 85°F in June, July, August and September.
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 USC00488385.
How hot and how cold does it get at South Pass City?
In a normal year in South Pass City, a 90°F day is rare and 267 nights fall to 32°F or colder.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 267a normal year
- Days that stay below freezing
- 85high of 32°F or less
The highest temperature in this station's record (since 1900) is 102°F, on August 10, 1903; the lowest is −46°F, on December 19, 1924.
The wettest calendar year on that record is 1967, with 22.28 in; the snowiest season is 1996–97, with 216.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00488385; records: ACIS (NOAA Regional Climate Centers), station USC00488385. Records use complete months only; a month missing more than three days is left out.
How sunny is it at South Pass City?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds at South Pass City, 4.8 kWh per square metre a day. July is the sunniest month (86%) and December the cloudiest (72%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 2.3 |
| February | 78% | 3.3 |
| March | 74% | 4.4 |
| April | 75% | 5.6 |
| May | 77% | 6.6 |
| June | 85% | 7.7 |
| July | 86% | 7.4 |
| August | 86% | 6.5 |
| September | 86% | 5.3 |
| October | 80% | 3.6 |
| November | 78% | 2.5 |
| December | 72% | 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 many heating and cooling degree days does South Pass City record?
A normal year at South Pass City brings 10,645 heating degree days, 98% more than the median U.S. place (5,373), and 16 cooling degree days, 98% fewer than the median (908). Ten months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 745 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,544 | 0 |
| February | 1,354 | 0 |
| March | 1,231 | 0 |
| April | 950 | 0 |
| May | 674 | 0 |
| June | 385 | 1 |
| July | 192 | 12 |
| August | 236 | 3 |
| September | 477 | 0 |
| October | 848 | 0 |
| November | 1,217 | 0 |
| December | 1,539 | 0 |
| Year (annual) | 10,645 | 16 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00488385. 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 South Pass City's climate compare?
South Pass City is warmer than 2 of the 71 places with their own NOAA record in Wyoming. Across the 7,247 U.S. stations with normals, its annual mean of 35.8°F is warmer than 2%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Questions about South Pass City's climate
What is the coldest month at South Pass City?
January, with a normal high of 28°F and a normal low of 2°F. The warmest is July (78°F by day, 41°F at night).
Does it snow at South Pass City?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Lander (24 miles away), records 88 inches of snow in a normal year.
What plant hardiness zone is South Pass City in?
The USDA's 2023 map puts South Pass City in zone 5a in ZIP code 82520, the nearest ZIP area.
Nearby and next
- Wyoming climateThe statewide normals and every place in the state
- Atlantic City, WY4 miles from this station, 36.5°F a year
- Lander, WY24 miles from this station, 45.1°F a year
- Farson, WY39 miles from this station, 37.8°F a year
- Riverton, WY45 miles from this station, 44.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made