Clark, 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 Clark's primary NOAA station, CLARK 3NE.
The climate verdict for Clark
Dryness leads the climate profile for Clark, Wyoming, with 7.7 inches of precipitation a year. NOAA records an annual average of 45°F. At 29/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 1% of scores.
- 45°F
- average temperature, NOAA 1991-2020 normal
- 29/100
- comfort score, above 1% of station-mapped location scores
- 7.7"
- annual precipitation · 21" snow
- 127 days
- frost-free days per growing season
Clark: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00481775 · Clark, WY 45°F mean · 7.7" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-ARID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 45°F
- RANK-COOL #1,166
- PHOTO-FINISH ≈ Tiber Dam
- PRCP-ARID 7.7"
- SWING-WIDE 48°F
- COMF-LOW 29/100
- LOAD-HEAT 7,765 HDD
- STN-1 USC00481775
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Tiber Dam, 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.
- Clark (this station) 45°F
- Hot Glendo, WY 45°F
- Near Tiber Dam, MT 45°F
- Near S Boardman, MI 45°F
- Near Fryeburg E Slop…, ME 45°F
Clark 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 · Clark
Clark: 17/100 · grade F
Clark publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Clark, not an official NOAA rating. Rankings still use Comfort Score 29/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 21.1 inches/year | 48/100 · D |
| Annual temperature balance | 44.6°F · 22.9° from 67.5°F | 18/100 · F |
| Normal heat + freeze calendar | 199 calendar days | 14/100 · F |
| Frost-free season | 127 days/year | 10/100 · F |
| Precipitation balance | 7.7 in · 27.3 from 35 in | 7/100 · F |
Clark · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Clark's normals sit in a dry climate class: BWk
Annual precipitation falls well below the aridity threshold for this temperature regime, so the normals classify as cold desert (BWk). Class BWk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold desert.
- Köppen code
- BWk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 69.5°F
- Coldest month
- 22.0°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 Clark sits across the climate record
Three NOAA fields for Clark's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 83%
- Among 6,861 stations, Clark sits in the cooler third of annual means.
- Annual precipitation
- Drier than 97%
- Clark's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 70%
- Warmest-to-coldest month gap for Clark is large versus 6,861 complete station-years.
How Clark compares across U.S. station-mapped locations
Clark's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
29 1st percentile score exceeds 1% 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
Clark's measured station temperature trend
MethodologyAcross 40 complete annual observations from 1962 to 2025, CLARK 3NE warmed at a fitted rate of 0.20°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Clark primary station fitted change +0.20 °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 | 37°F (3°C) | 7°F (-14°C) | 22°F (-6°C) | 0.3" | 4.1" | 30.7 | 0.0 |
| February | 40°F (4°C) | 11°F (-12°C) | 26°F (-4°C) | 0.3" | 4.5" | 26.8 | 0.0 |
| March | 51°F (10°C) | 21°F (-6°C) | 36°F (2°C) | 0.3" | 2.5" | 27.4 | 0.0 |
| April | 57°F (14°C) | 30°F (-1°C) | 44°F (6°C) | 0.7" | 1.8" | 19.3 | 0.0 |
| May | 66°F (19°C) | 40°F (4°C) | 53°F (12°C) | 1.4" | 0.1" | 5.1 | 0.3 |
| June | 76°F (24°C) | 48°F (9°C) | 62°F (17°C) | 1.3" | 0.0" | 0.4 | 2.6 |
| July | 85°F (30°C) | 54°F (12°C) | 70°F (21°C) | 0.8" | 0.0" | 0.0 | 9.7 |
| August | 84°F (29°C) | 51°F (11°C) | 67°F (20°C) | 0.7" | 0.0" | 0.1 | 7.7 |
| September | 73°F (23°C) | 42°F (5°C) | 58°F (14°C) | 0.8" | 0.0" | 3.3 | 1.7 |
| October | 60°F (15°C) | 29°F (-2°C) | 44°F (7°C) | 0.6" | 1.2" | 20.7 | 0.0 |
| November | 47°F (8°C) | 18°F (-8°C) | 32°F (0°C) | 0.3" | 3.0" | 27.4 | 0.0 |
| December | 38°F (3°C) | 8°F (-13°C) | 23°F (-5°C) | 0.2" | 3.9" | 30.2 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 25, short of 90°F on every date, while 199 dates carry a normal low at or below freezing, the coldest 6°F near January 1.
The freezing stretch
The normal low stays at or below 32°F into April 24, then returns to freezing around October 9, covering 199 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 30, when 29% of years recorded at least a hundredth of an inch. The driest is January 17 at 9%. Summed across the calendar, that is about 61 wet dates a year.
The widest day
August 7 carries the biggest normal gap between afternoon and dawn, 32°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Clark.
Where Clark Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 199 nights a year, placing this among the most frost-prone tenth of ranked stations.
Aridity defines the water calendar: about 8 inches in a normal year lands this among the driest tenth of ranked stations.
Clark 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: 4.1"
2.6 days with precipitation
Snow: 4.5"
3.4 days with precipitation
Snow: 2.5"
3.4 days with precipitation
Snow: 1.8"
5.4 days with precipitation
Snow: 0.1"
8.5 days with precipitation
8.1 days with precipitation
6.9 days with precipitation
5.8 days with precipitation
5.2 days with precipitation
Snow: 1.2"
4.5 days with precipitation
Snow: 3.0"
3.5 days with precipitation
Snow: 3.9"
3.4 days with precipitation
Clark runs a summer-peaked wet season
36% of Clark's yearly precipitation falls in June, July and August alone, against the 25% an evenly spread year would give those three months. The wettest month is May at 1.4", on a wide 47.5°F gap between its warmest and coldest month. Warm-season convection and, across the Southwest, the North American monsoon produce this shape: rain arrives in short heavy bursts during the hottest part of the year rather than as long cool-season soaking.
- Wettest three months: May, June, July, taking 45% of the annual total between them.
- Driest month: December at 0.2".
- Winter share: 10% falls in December, January and February.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A summer-peaked label means the June-August share reaches 35%; it describes timing across an average year, not any single season, and says nothing about how heavy an individual storm can be.
Clark is dry, and what does fall arrives gently
Only about 61 days a year record measurable precipitation here, 17% of the calendar, and they carry 7.7" between them. At roughly 0.13 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 Clark
Clark averages 21.1 inches of snowfall a year, with February the snowiest month on the normals, spread across roughly 15 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: 21.1 inches of depth.
- Days recording measurable snow: about 15 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 27% 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 22
50% probability date
Last Spring Freeze
May 18
50% probability date
Growing Season
127 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,765
Higher = more heating needed
Cooling Degree Days
370
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside WY closest to Clark 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).
- Bath, ME 45°F · 0.0°F off
- Corning, NY 45°F · 0.0°F off
- Darby, MT 45°F · 0.0°F off
- Great Falls, MT 45°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (7.7" here), excluding temperature-peer places.
- Shafter, CA 7.7" · 0.0" off
- Manassa, CO 7.8" · 0.0" off
- Farmington, NM 7.8" · 0.0" off
- Big Water, UT 7.7" · 0.0" off
Snow and freeze rhythm
When cold and snow define Clark
heating led · dry · mid swing
Clark's energy balance leans toward cold weather: 7,765 annual heating degree days against 370 for cooling. Its 47.5°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 127 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. Clark coldest normal
January
Averaging 22°F (-6°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Clark typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Clark snow peak
February
Clark averages 21.1 inches of snow a year, with February the snowiest month on the normals.
Questions about Clark's climate
How much snow does Clark get? ▼
How cold does Clark get in winter? ▼
How much energy does heating and cooling require in Clark? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Clark's primary station: CLARK 3NE (USC00481775). 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 Clark; 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 Clark 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.