Powder River, WY Climate: Temperature by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Powder River's primary NOAA station, POWDER RIVER #2.
The climate verdict for Powder River
Powder River, Wyoming has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 45°F. July is the warmest month at 70°F and December the coldest at 22°F.
- 45°F
- yearly average temperature, NOAA normal
- 120 days
- growing season, frost-free days
Powder River: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00487376 · Powder River, WY 45°F mean
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-UNK · SWING-WIDE · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-COOL 45°F
- RANK-COOL #1,166
- PHOTO-FINISH ≈ Wright
- PRCP-UNK Rain n/a
- SWING-WIDE 49°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 7,827 HDD
- STN-1 USC00487376
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Wright, WY (+ 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.
- Powder River (this station) 45°F
- Hot Oconto, WI 45°F
- Near Wright, WY 45°F
- Near Hale Loud Dam, MI 45°F
- Cold Mio Wwtp, MI 44°F
Powder River 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 · Powder River
Powder River: 15/100 · grade F
Powder River publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Powder River, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 44.6°F · 22.9° from 67.5°F | 18/100 · F |
| Normal heat + freeze calendar | 200 calendar days | 14/100 · F |
| Frost-free season | 120 days/year | 7/100 · F |
Powder River · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Powder River sits across the climate record
Available NOAA 1991–2020 fields for Powder River are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- Cooler than 83%
- Among 6,861 stations, Powder River sits in the cooler third of annual means.
- Seasonal temperature swing
- Wider than 77%
- Warmest-to-coldest month gap for Powder River is large 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 | 34°F (1°C) | 10°F (-12°C) | 22°F (-6°C) | N/A | 30.3 | 0.0 |
| February | 37°F (3°C) | 13°F (-10°C) | 25°F (-4°C) | N/A | 27.6 | 0.0 |
| March | 49°F (9°C) | 22°F (-5°C) | 36°F (2°C) | N/A | 26.9 | 0.0 |
| April | 56°F (13°C) | 29°F (-2°C) | 43°F (6°C) | N/A | 20.7 | 0.0 |
| May | 66°F (19°C) | 37°F (3°C) | 52°F (11°C) | N/A | 6.8 | 0.1 |
| June | 79°F (26°C) | 46°F (8°C) | 62°F (17°C) | N/A | 0.4 | 3.4 |
| July | 88°F (31°C) | 52°F (11°C) | 70°F (21°C) | N/A | 0.0 | 15.6 |
| August | 87°F (30°C) | 51°F (11°C) | 69°F (20°C) | N/A | 0.0 | 13.0 |
| September | 75°F (24°C) | 42°F (5°C) | 59°F (15°C) | N/A | 4.4 | 1.1 |
| October | 59°F (15°C) | 31°F (-1°C) | 45°F (7°C) | N/A | 20.6 | 0.0 |
| November | 44°F (7°C) | 19°F (-7°C) | 32°F (0°C) | N/A | 27.2 | 0.0 |
| December | 32°F (0°C) | 11°F (-12°C) | 22°F (-6°C) | N/A | 29.5 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 90°F around July 25, short of 90°F on every date, while 200 dates carry a normal low at or below freezing, the coldest 9°F near December 27.
The freezing stretch
The normal low stays at or below 32°F into April 29, then returns to freezing around October 13, covering 200 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
July 18 carries the biggest normal gap between afternoon and dawn, 36°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Powder River.
Where Powder River Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 200 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 36°F, sharper than nine in ten ranked stations see.
Powder River 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
September 20
50% probability date
Last Spring Freeze
May 23
50% probability date
Growing Season
120 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,827
Higher = more heating needed
Cooling Degree Days
411
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside WY closest to Powder River 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
Data-derived climate profile
How Powder River's climate pattern fits together
heating led · mid swing
Powder River's energy balance leans toward cold weather: 7,827 annual heating degree days against 411 for cooling. Its 48.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 120 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 December mark the typical warm and cold ends of the calendar in Powder River's middle-range seasonal profile. The measured spread is 48.8°F. The annual average is 45°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
A moisture-range label is withheld because Powder River'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 Powder River'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 Powder River, not an official NOAA class or a year-ahead forecast.
Questions about Powder River's climate
How many days above 90°F does Powder River get? ▼
How much energy does heating and cooling require in Powder River? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Powder River's primary station: POWDER RIVER #2 (USC00487376). 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 5662305), not an incorporated municipality. Match rule for Powder River: 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 Powder River 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.