South Pass City, WY Climate: Temperature by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from South Pass City's primary NOAA station, SOUTH PASS CITY.
The climate verdict for South Pass City
South Pass City, Wyoming has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 36°F. July is the warmest month at 59°F and January the coldest at 15°F.
- 36°F
- average temperature, NOAA 1991-2020 normal
South Pass City: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00488385 · South Pass City, WY 36°F mean
TEMP-COLD · RANK-COOL · PHOTO-FINISH · PRCP-UNK · SWING-MID · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-COLD 36°F
- RANK-COOL #137
- PHOTO-FINISH ≈ Talkeetna
- PRCP-UNK Rain n/a
- SWING-MID 44°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 10,645 HDD
- STN-1 USC00488385
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Talkeetna, AK (+ 0.1 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every WY station list.
- South Pass City (this station) 36°F
- Cold Moran, WY 36°F
- Hot Talkeetna, AK 36°F
- Near Kenai, AK 36°F
- Near Little SU AT Ha…, AK 36°F
South Pass City sits in Wyoming, the #5 coldest U.S. state at 43.3°F statewide annual average - see all 50 coldest states ranked by NOAA normals
National standing · heating-led station
Where South Pass City sits across the climate record
Available NOAA 1991–2020 fields for South Pass City are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- Cooler than 98%
- Among 6,861 stations, South Pass City sits in the cooler third of annual means.
- Seasonal temperature swing
- 53rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 28°F (-2°C) | 2°F (-16°C) | 15°F (-9°C) | N/A | 30.9 | 0.0 |
| February | 29°F (-2°C) | 4°F (-15°C) | 17°F (-8°C) | N/A | 28.0 | 0.0 |
| March | 38°F (3°C) | 12°F (-11°C) | 25°F (-4°C) | N/A | 30.8 | 0.0 |
| April | 47°F (9°C) | 19°F (-7°C) | 33°F (1°C) | N/A | 29.2 | 0.0 |
| May | 59°F (15°C) | 28°F (-2°C) | 43°F (6°C) | N/A | 23.4 | 0.0 |
| June | 70°F (21°C) | 35°F (2°C) | 52°F (11°C) | N/A | 11.6 | 0.0 |
| July | 78°F (25°C) | 41°F (5°C) | 59°F (15°C) | N/A | 2.7 | 0.4 |
| August | 77°F (25°C) | 38°F (4°C) | 58°F (14°C) | N/A | 4.6 | 0.0 |
| September | 67°F (20°C) | 31°F (-1°C) | 49°F (10°C) | N/A | 17.6 | 0.0 |
| October | 53°F (12°C) | 23°F (-5°C) | 38°F (3°C) | N/A | 28.0 | 0.0 |
| November | 37°F (3°C) | 12°F (-11°C) | 24°F (-4°C) | N/A | 29.5 | 0.0 |
| December | 28°F (-2°C) | 3°F (-16°C) | 15°F (-9°C) | N/A | 30.9 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 79°F around July 25, short of 90°F on every date, while 264 dates carry a normal low at or below freezing, the coldest 2°F near December 23.
The freezing stretch
The normal low stays at or below 32°F into June 1, then returns to freezing around September 12, covering 264 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
The widest day
August 24 carries the biggest normal gap between afternoon and dawn, 39°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for South Pass City.
Where South Pass City Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 264 nights a year, placing this among the most frost-prone tenth of ranked stations.
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 39°F, sharper than nine in ten ranked stations see.
South Pass City earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
Frost Dates & Growing Season
First Fall Freeze
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
10,645
Higher = more heating needed
Cooling Degree Days
16
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside WY closest to South Pass City on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (36°F here).
- Moose Pass, AK 36°F · 0.1°F off
- Sterling, AK 36°F · 0.1°F off
- Talkeetna, AK 36°F · 0.1°F off
- Orr, MN 36°F · 0.2°F off
Data-derived climate profile
How South Pass City's climate pattern fits together
heating led · mid swing
South Pass City's energy balance leans toward cold weather: 10,645 annual heating degree days against 16 for cooling. Its 44.0°F seasonal range still makes the monthly rows more useful than the annual average alone.
A frost-free growing-season length is not available for South Pass City. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
July and January mark the typical warm and cold ends of the calendar in South Pass City's middle-range seasonal profile. The measured spread is 44.0°F. The annual average is 36°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
A moisture-range label is withheld because South Pass City's annual precipitation total is unavailable. Monthly source values remain visible where NOAA provides them, and no annual amount is reconstructed from incomplete data.
These labels group NOAA 1991-2020 normals from South Pass City's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for South Pass City, not an official NOAA class or a year-ahead forecast.
Questions about South Pass City's climate
How cold does South Pass City get in winter? ▼
How much energy does heating and cooling require in South Pass City? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from South Pass City's primary station: SOUTH PASS CITY (USC00488385). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for South Pass City; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for South Pass City comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.