Sheridan County, WY Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Sheridan County's primary NOAA station, SHERIDAN CO AP.
The climate verdict for Sheridan County
Dryness leads the climate profile for Sheridan County, Wyoming, with 14.9 inches of precipitation a year. NOAA records an annual average of 45°F. At 52/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 24% of scores.
- 45°F
- annual average temperature (NOAA normal)
- 52/100
- comfort score, above 24% of station-mapped location scores
- 14.9"
- annual precipitation
- 125 days
- frost-free growing season
Sheridan County: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00024029 · Sheridan County, WY 45°F mean · 14.9" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 45°F
- RANK-COOL #1,372
- PHOTO-FINISH ≈ Fort Benton
- PRCP-DRY 14.9"
- SWING-WIDE 47°F
- COMF-LOW 52/100
- LOAD-HEAT 7,542 HDD
- STN-1 USW00024029
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Fort Benton, MT (+ 0 °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.
- Hot Billy Creek, WY 46°F
- Sheridan County (this station) 45°F
- Near Fort Benton, MT 45°F
- Near Roy, MT 45°F
- Near Muddy Gap, WY 45°F
Sheridan County 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
Climate Living Index · Sheridan County
Sheridan County: 29/100 · grade F
Sheridan County publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals); 1 missing weight rescale to 100.
PlainClimate-derived for Sheridan County, not an official NOAA rating. Rankings still use Comfort Score 52/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Summer moisture balance | 47.3°F mean dew point | 79/100 · B |
| Precipitation balance | 14.9 in · 20.1 from 35 in | 28/100 · F |
| Annual temperature balance | 45.4°F · 22.1° from 67.5°F | 21/100 · F |
| Normal heat + freeze calendar | 196 calendar days | 16/100 · F |
| Frost-free season | 125 days/year | 9/100 · F |
Sheridan County · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Sheridan County is a continental Köppen climate: Dfb
Coldest-month mean 24.0°F and warmest-month mean 70.7°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 70.7°F
- Coldest month
- 24.0°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Sheridan County sits across the climate record
Three NOAA fields for Sheridan County's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 80%
- Among 6,861 stations, Sheridan County sits in the cooler third of annual means.
- Annual precipitation
- Drier than 83%
- Sheridan County's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 67th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Sheridan County compares across U.S. station-mapped locations
Sheridan County's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
52 24th percentile score exceeds 24% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). This entry sits in this band.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Sheridan County's measured station temperature trend
MethodologyAcross 117 complete annual observations from 1908 to 2025, SHERIDAN CO AP warmed at a fitted rate of 0.18°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Sheridan County primary station fitted change +0.18 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 36°F (2°C) | 12°F (-11°C) | 24°F (-4°C) | 0.6" | 30.4 | 0.0 |
| February | 38°F (4°C) | 14°F (-10°C) | 26°F (-3°C) | 0.7" | 27.2 | 0.0 |
| March | 49°F (9°C) | 22°F (-5°C) | 36°F (2°C) | 1.0" | 26.7 | 0.0 |
| April | 57°F (14°C) | 30°F (-1°C) | 43°F (6°C) | 1.9" | 18.0 | 0.0 |
| May | 66°F (19°C) | 39°F (4°C) | 52°F (11°C) | 2.7" | 5.7 | 0.3 |
| June | 77°F (25°C) | 47°F (8°C) | 62°F (17°C) | 2.0" | 0.2 | 3.1 |
| July | 88°F (31°C) | 54°F (12°C) | 71°F (22°C) | 1.1" | 0.0 | 14.3 |
| August | 87°F (30°C) | 52°F (11°C) | 69°F (21°C) | 0.7" | 0.1 | 13.3 |
| September | 76°F (24°C) | 43°F (6°C) | 59°F (15°C) | 1.5" | 2.2 | 3.4 |
| October | 60°F (16°C) | 31°F (-1°C) | 45°F (7°C) | 1.6" | 16.6 | 0.1 |
| November | 47°F (8°C) | 20°F (-7°C) | 33°F (1°C) | 0.8" | 27.0 | 0.0 |
| December | 37°F (3°C) | 12°F (-11°C) | 25°F (-4°C) | 0.5" | 30.6 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 90°F around July 26, short of 90°F on every date, while 196 dates carry a normal low at or below freezing, the coldest 11°F near January 1.
The freezing stretch
The normal low stays at or below 32°F into April 26, then returns to freezing around October 14, covering 196 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.
Where the wet dates fall
The likeliest wet date is May 16, when 40% of years recorded at least a hundredth of an inch. The driest is August 22 at 20%. Summed across the calendar, that is about 103 wet dates a year.
The widest day
August 15 carries the biggest normal gap between afternoon and dawn, 35°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Sheridan County.
Where Sheridan County Stands Nationally
Freezing is routine here by normals standards — the normal low reaches 32°F or colder on about 196 nights a year, more than most ranked stations.
A drier-than-most normal water year — around 15 inches, below what four out of five ranked stations collect.
Sheridan County earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
7.5 days with precipitation
8.1 days with precipitation
9.7 days with precipitation
10.8 days with precipitation
12.3 days with precipitation
10.2 days with precipitation
7.6 days with precipitation
6.3 days with precipitation
6.6 days with precipitation
8.8 days with precipitation
7.3 days with precipitation
7.1 days with precipitation
Sheridan County spreads its precipitation across the year
Neither half of the year dominates here: June through August take 25% of the annual total and December through February 12%, with neither reaching the 35% that would mark a distinct wet season. Sheridan County has no dry season to plan around, though it does carry a wide 46.7°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: May averages 2.7" and December 0.5". The three wettest months together take 44% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
Sheridan County is dry, and what does fall arrives gently
Only about 102 days a year record measurable precipitation here, 28% of the calendar, and they carry 14.9" between them. At roughly 0.15 inches on an average wet day, this is not the damp drizzle of a marine climate; it is an arid record in which precipitation is both uncommon and light when it appears.
The wettest month by count is May at about 12 wet days; the driest is August at about 6.
A low per-event average in a dry record is a statement about typical days only. Arid regions can still take a large share of a year's total from a single convective storm, which a normal cannot show.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, not the extremes within it.
Frost Dates & Growing Season
First Fall Freeze
September 23
50% probability date
Last Spring Freeze
May 21
50% probability date
Growing Season
125 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,542
Higher = more heating needed
Cooling Degree Days
441
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 66% | 6.6 | 49% | 28% |
| February | 64% | 7.2 | 49% | 27% |
| March | 59% | 8.7 | 42% | 29% |
| April | 59% | 9.2 | 43% | 27% |
| May | 63% | 7.5 | 43% | 23% |
| June | 53% | 6.6 | 60% | 9% |
| July | 46% | 6.1 | 68% | 6% |
| August | 43% | 6.1 | 66% | 9% |
| September | 55% | 6.6 | 60% | 18% |
| October | 61% | 6.8 | 55% | 24% |
| November | 66% | 6.4 | 53% | 26% |
| December | 68% | 6.4 | 52% | 27% |
Nationwide similar cities
Other rankable U.S. places outside WY closest to Sheridan County 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 (45°F here).
- Alberton, MT 45°F · 0.0°F off
- Augusta, MT 45°F · 0.0°F off
- Beloit, WI 45°F · 0.0°F off
- Deadwood, SD 45°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (14.9" here), excluding temperature-peer places.
- Kanab, UT 14.9" · 0.0" off
- Broadus, MT 14.9" · 0.0" off
- Cascade, MT 14.9" · 0.0" off
- Hysham, MT 14.9" · 0.0" off
Scarce-water calendar
Where Sheridan County's limited precipitation lands
heating led · dry · mid swing
Sheridan County's energy balance leans toward cold weather: 7,542 annual heating degree days against 441 for cooling. Its 46.7°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 125 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
July and January mark the typical warm and cold ends of the calendar in Sheridan County's middle-range seasonal profile. The measured spread is 46.7°F. The annual average is 45°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Sheridan County's cold-season load does not imply a wet climate. Annual precipitation is 14.9 inches, which places the station in PlainClimate's dry range. Snowfall is not added to the interpretation because its annual value is missing. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
Sheridan County wettest normal
May
May concentrates the scarce annual total (14.9 inches).
Sheridan County driest normal
December
December is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Sheridan County's climate
How dry is Sheridan County? ▼
How many days above 90°F does Sheridan County get? ▼
How much energy does heating and cooling require in Sheridan County? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Sheridan County's primary station: SHERIDAN CO AP (USW00024029). 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 Sheridan County; 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 Sheridan County 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.