Jeffrey City, 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 Jeffrey City's primary NOAA station, JEFFREY CITY.
The climate verdict for Jeffrey City
Dryness leads the climate profile for Jeffrey City, Wyoming, with 9.9 inches of precipitation a year. NOAA records an annual average of 42°F. At 24/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 0% of scores.
- 42°F
- average temperature, NOAA 1991-2020 normal
- 24/100
- comfort score, above 0% of station-mapped location scores
- 9.9"
- annual precipitation · 60" snow
- 104 days
- frost-free growing season
Jeffrey City: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00484925 · Jeffrey City, WY 42°F mean · 9.9" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-ARID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 42°F
- RANK-COOL #686
- PHOTO-FINISH ≈ Munsing Lakesho…
- PRCP-ARID 9.9"
- SWING-WIDE 48°F
- COMF-LOW 24/100
- LOAD-HEAT 8,486 HDD
- STN-1 USC00484925
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Munsing Lakeshore, MI (+ 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.
- Jeffrey City (this station) 42°F
- Cold Trout Lake, MI 42°F
- Hot Pellston, MI 42°F
- Near Munsing Lakesho…, MI 42°F
- Near Escanaba, MI 42°F
Jeffrey 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
Climate Living Index · Jeffrey City
Jeffrey City: 9/100 · grade F
Jeffrey City publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Jeffrey City, not an official NOAA rating. Rankings still use Comfort Score 24/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 60.2 inches/year | 15/100 · F |
| Precipitation balance | 9.9 in · 25.1 from 35 in | 12/100 · F |
| Annual temperature balance | 42.3°F · 25.2° from 67.5°F | 10/100 · F |
| Normal heat + freeze calendar | 214 calendar days | 7/100 · F |
| Frost-free season | 104 days/year | 0/100 · F |
Jeffrey City · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Jeffrey City's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 67.6°F
- Coldest month
- 20.0°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 Jeffrey City sits across the climate record
Three NOAA fields for Jeffrey City's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 90%
- Among 6,861 stations, Jeffrey City sits in the cooler third of annual means.
- Annual precipitation
- Drier than 94%
- Jeffrey City's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 71%
- Warmest-to-coldest month gap for Jeffrey City is large versus 6,861 complete station-years.
How Jeffrey City compares across U.S. station-mapped locations
Jeffrey City's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
24 0th percentile score exceeds 0% 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%). This entry sits in this band.
- 30–40: 280 station-mapped locations (5%). Above this entry.
- 40–50: 1,113 station-mapped locations (18%). Above this entry.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 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
Jeffrey City's measured station temperature trend
MethodologyAcross 30 complete annual observations from 1989 to 2025, JEFFREY CITY warmed at a fitted rate of 0.07°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Jeffrey City primary station fitted change +0.07 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 31°F (-1°C) | 9°F (-13°C) | 20°F (-7°C) | 0.3" | 5.0" | 30.8 | 0.0 |
| February | 34°F (1°C) | 11°F (-12°C) | 22°F (-5°C) | 0.5" | 7.0" | 27.5 | 0.0 |
| March | 45°F (7°C) | 20°F (-7°C) | 32°F (0°C) | 0.8" | 8.8" | 28.4 | 0.0 |
| April | 54°F (12°C) | 26°F (-3°C) | 40°F (5°C) | 1.4" | 12.1" | 23.4 | 0.0 |
| May | 64°F (18°C) | 35°F (2°C) | 50°F (10°C) | 2.0" | 5.6" | 11.1 | 0.0 |
| June | 76°F (25°C) | 43°F (6°C) | 60°F (15°C) | 1.0" | 0.4" | 1.0 | 1.5 |
| July | 85°F (30°C) | 50°F (10°C) | 68°F (20°C) | 0.7" | 0.0" | 0.1 | 7.7 |
| August | 83°F (29°C) | 48°F (9°C) | 66°F (19°C) | 0.5" | 0.0" | 0.3 | 4.0 |
| September | 73°F (23°C) | 39°F (4°C) | 56°F (13°C) | 0.8" | 1.3" | 6.7 | 0.3 |
| October | 58°F (14°C) | 29°F (-2°C) | 43°F (6°C) | 0.9" | 7.4" | 20.6 | 0.0 |
| November | 42°F (6°C) | 18°F (-8°C) | 30°F (-1°C) | 0.5" | 6.3" | 26.9 | 0.0 |
| December | 31°F (-1°C) | 10°F (-12°C) | 20°F (-6°C) | 0.5" | 6.3" | 30.5 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 24, short of 90°F on every date, while 214 dates carry a normal low at or below freezing, the coldest 8°F near December 24.
The freezing stretch
The normal low stays at or below 32°F into May 7, then returns to freezing around October 7, covering 214 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 9, when 27% of years recorded at least a hundredth of an inch. The driest is January 13 at 9%. Summed across the calendar, that is about 56 wet dates a year.
The widest day
July 7 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 Jeffrey City.
Where Jeffrey City Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 214 nights a year, placing this among the most frost-prone tenth of ranked stations.
Aridity defines the water calendar: about 10 inches in a normal year lands this among the driest tenth of ranked stations.
Jeffrey 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 and snowfall
Snow: 5.0"
2.8 days with precipitation
Snow: 7.0"
3.8 days with precipitation
Snow: 8.8"
4.4 days with precipitation
Snow: 12.1"
6.9 days with precipitation
Snow: 5.6"
8.7 days with precipitation
Snow: 0.4"
5.2 days with precipitation
4.2 days with precipitation
4.0 days with precipitation
Snow: 1.3"
4.9 days with precipitation
Snow: 7.4"
4.8 days with precipitation
Snow: 6.3"
3.1 days with precipitation
Snow: 6.3"
3.1 days with precipitation
Jeffrey City spreads its precipitation across the year
Neither half of the year dominates here: June through August take 22% of the annual total and December through February 13%, with neither reaching the 35% that would mark a distinct wet season. Jeffrey City has no dry season to plan around, though it does carry a wide 47.6°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: May averages 2.0" and January 0.3". 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.
Jeffrey City is dry, and what does fall arrives gently
Only about 56 days a year record measurable precipitation here, 15% of the calendar, and they carry 9.9" between them. At roughly 0.18 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 9 wet days; the driest is January at about 3.
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.
Winter brings real snow to Jeffrey City
Jeffrey City averages 60.2 inches of snowfall a year, with April the snowiest month on the normals, spread across roughly 24 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 60.2 inches of depth.
- Days recording measurable snow: about 24 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 61% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
September 13
50% probability date
Last Spring Freeze
June 1
50% probability date
Growing Season
104 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,486
Higher = more heating needed
Cooling Degree Days
230
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside WY closest to Jeffrey 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 (42°F here).
- Bowman, ND 42°F · 0.0°F off
- Britton, SD 42°F · 0.0°F off
- Cascade, MT 42°F · 0.0°F off
- Center, CO 42°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (9.9" here), excluding temperature-peer places.
- Fruita, CO 9.9" · 0.0" off
- Woodruff, UT 9.9" · 0.0" off
- Buena Vista, CO 9.9" · 0.0" off
- Castle Valley, UT 9.8" · 0.1" off
Snow and freeze rhythm
When cold and snow define Jeffrey City
heating led · dry · mid swing
Jeffrey City's energy balance leans toward cold weather: 8,486 annual heating degree days against 230 for cooling. Its 47.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 104 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.
-
1. Jeffrey City coldest normal
January
Averaging 20°F (-7°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Jeffrey City typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Jeffrey City snow peak
April
Jeffrey City averages 60.2 inches of snow a year, with April the snowiest month on the normals.
Questions about Jeffrey City's climate
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Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Jeffrey City's primary station: JEFFREY CITY (USC00484925). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as a census-designated place (GEOID 5640555), not an incorporated municipality. Match rule for Jeffrey City: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Jeffrey 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.