Butte Bert Mooney, MT Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Butte Bert Mooney's primary NOAA station, BUTTE BERT MOONEY AP.
The climate verdict for Butte Bert Mooney
Dryness leads the climate profile for Butte Bert Mooney, Montana, with 12.8 inches of precipitation a year. NOAA records an annual average of 40°F. At 40/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 6% of scores.
- 40°F
- average temperature, NOAA 1991-2020 normal
- 40/100
- comfort score, above 6% of station-mapped location scores
- 12.8"
- yearly precipitation total
- 84 days
- growing season, frost-free days
Butte Bert Mooney: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00024135 · Butte Bert Mooney, MT 40°F mean · 12.8" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 40°F
- RANK-COOL #343
- PHOTO-FINISH ≈ Ketchum Ranger…
- PRCP-DRY 12.8"
- SWING-MID 45°F
- COMF-LOW 40/100
- LOAD-HEAT 9,129 HDD
- STN-1 USW00024135
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Ketchum Ranger Station, ID (+ 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 MT station list.
- Butte Bert Moon… (this station) 40°F
- Cold Coal Creek Cany…, CO 40°F
- Hot Austin, MT 40°F
- Near Ketchum Ranger…, ID 40°F
- Near Elliston, MT 40°F
Butte Bert Mooney sits in Montana, the #6 coldest U.S. state at 43.4°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Butte Bert Mooney
Butte Bert Mooney: 8/100 · grade F
Butte Bert Mooney publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Butte Bert Mooney, not an official NOAA rating. Rankings still use Comfort Score 40/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 12.8 in · 22.2 from 35 in | 21/100 · F |
| Annual temperature balance | 40.1°F · 27.4° from 67.5°F | 5/100 · F |
| Normal heat + freeze calendar | 221 calendar days | 5/100 · F |
| Frost-free season | 84 days/year | 0/100 · F |
Butte Bert Mooney · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Butte Bert Mooney'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
- 63.6°F
- Coldest month
- 19.0°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 Butte Bert Mooney sits across the climate record
Three NOAA fields for Butte Bert Mooney's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 95%
- Among 6,861 stations, Butte Bert Mooney sits in the cooler third of annual means.
- Annual precipitation
- Drier than 88%
- Butte Bert Mooney's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 56th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Butte Bert Mooney compares across U.S. station-mapped locations
Butte Bert Mooney's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
40 6th percentile score exceeds 6% 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%). This entry sits in this band.
- 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
Butte Bert Mooney's measured station temperature trend
MethodologyAcross 115 complete annual observations from 1895 to 2025, BUTTE BERT MOONEY AP warmed at a fitted rate of 0.04°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Butte Bert Mooney primary station fitted change +0.04 °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 | 32°F (0°C) | 8°F (-13°C) | 20°F (-7°C) | 0.4" | 30.5 | 0.0 |
| February | 35°F (1°C) | 10°F (-12°C) | 22°F (-5°C) | 0.4" | 27.3 | 0.0 |
| March | 44°F (7°C) | 19°F (-7°C) | 32°F (0°C) | 0.6" | 29.6 | 0.0 |
| April | 51°F (11°C) | 26°F (-3°C) | 39°F (4°C) | 1.3" | 24.8 | 0.0 |
| May | 61°F (16°C) | 34°F (1°C) | 48°F (9°C) | 2.0" | 12.0 | 0.0 |
| June | 70°F (21°C) | 41°F (5°C) | 56°F (13°C) | 2.5" | 2.4 | 0.4 |
| July | 81°F (27°C) | 46°F (8°C) | 64°F (18°C) | 1.2" | 0.2 | 4.1 |
| August | 80°F (27°C) | 44°F (7°C) | 62°F (17°C) | 1.3" | 0.7 | 2.6 |
| September | 69°F (21°C) | 37°F (3°C) | 53°F (12°C) | 1.1" | 8.7 | 0.3 |
| October | 54°F (12°C) | 27°F (-3°C) | 41°F (5°C) | 0.8" | 24.2 | 0.0 |
| November | 40°F (5°C) | 16°F (-9°C) | 28°F (-2°C) | 0.6" | 28.6 | 0.0 |
| December | 31°F (-1°C) | 7°F (-14°C) | 19°F (-7°C) | 0.5" | 30.5 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 84°F around July 25, short of 90°F on every date, while 221 dates carry a normal low at or below freezing, the coldest 6°F near December 20.
The freezing stretch
The normal low stays at or below 32°F into May 9, then returns to freezing around October 2, covering 221 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 June 2, when 48% of years recorded at least a hundredth of an inch. The driest is January 12 at 22%. Summed across the calendar, that is about 108 wet dates a year.
The widest day
July 31 carries the biggest normal gap between afternoon and dawn, 37°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Butte Bert Mooney.
Where Butte Bert Mooney Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 221 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 37°F, sharper than nine in ten ranked stations see.
Butte Bert Mooney earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
6.8 days with precipitation
7.4 days with precipitation
8.8 days with precipitation
11.2 days with precipitation
13.0 days with precipitation
13.7 days with precipitation
8.7 days with precipitation
7.7 days with precipitation
6.9 days with precipitation
8.2 days with precipitation
7.8 days with precipitation
7.2 days with precipitation
Butte Bert Mooney runs a summer-peaked wet season
39% of Butte Bert Mooney'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 June at 2.5", on a 44.6°F seasonal spread. 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: June, May, April, taking 45% of the annual total between them.
- Driest month: January at 0.4".
- 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.
Butte Bert Mooney is dry, and what does fall arrives gently
Only about 107 days a year record measurable precipitation here, 29% of the calendar, and they carry 12.8" between them. At roughly 0.12 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 June at about 14 wet days; the driest is January at about 7.
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 5
50% probability date
Last Spring Freeze
June 13
50% probability date
Growing Season
84 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,129
Higher = more heating needed
Cooling Degree Days
83
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside MT closest to Butte Bert Mooney 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 (40°F here).
- Detroit Lakes, MN 40°F · 0.0°F off
- Gustavus, AK 40°F · 0.0°F off
- Homer, AK 40°F · 0.0°F off
- Long Prairie, MN 40°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (12.8" here), excluding temperature-peer places.
- Rifle, CO 12.8" · 0.0" off
- Ritzville, WA 12.8" · 0.0" off
- Santa FE, NM 12.8" · 0.0" off
- Tehachapi, CA 12.7" · 0.0" off
Scarce-water calendar
Where Butte Bert Mooney's limited precipitation lands
heating led · dry · mid swing
Butte Bert Mooney's energy balance leans toward cold weather: 9,129 annual heating degree days against 83 for cooling. Its 44.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 84 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 Butte Bert Mooney's middle-range seasonal profile. The measured spread is 44.6°F. The annual average is 40°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Butte Bert Mooney's cold-season load does not imply a wet climate. Annual precipitation is 12.8 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.
Butte Bert Mooney wettest normal
June
June concentrates the scarce annual total (12.8 inches).
Butte Bert Mooney driest normal
January
January is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Butte Bert Mooney'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 Butte Bert Mooney's primary station: BUTTE BERT MOONEY AP (USW00024135). 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 Butte Bert Mooney; 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 Butte Bert Mooney 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.