Twin Bridges, MT Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Twin Bridges's primary NOAA station, TWIN BRIDGES.
The climate verdict for Twin Bridges
Dryness leads the climate profile for Twin Bridges, Montana, with 9.4 inches of precipitation a year. NOAA records an annual average of 44°F. At 28/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 0% of scores.
- 44°F
- annual average temperature (NOAA normal)
- 28/100
- comfort score, above 0% of station-mapped location scores
- 9.4"
- annual precipitation
- 86 days
- growing season, frost-free days
Twin Bridges: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00248430 · Twin Bridges, MT 44°F mean · 9.4" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-ARID · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 44°F
- RANK-COOL #892
- PHOTO-FINISH ≈ Moorman Rch - R…
- PRCP-ARID 9.4"
- SWING-MID 42°F
- COMF-LOW 28/100
- LOAD-HEAT 7,934 HDD
- STN-1 USC00248430
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Moorman Rch - Ruth, NV (+ 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 MT station list.
- Twin Bridges (this station) 44°F
- Hot Pierce, ID 44°F
- Near Moorman Rch - R…, NV 44°F
- Near Swan Lake, MT 44°F
- Near Virginia Dale, CO 44°F
Twin Bridges 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 · Twin Bridges
Twin Bridges: 9/100 · grade F
Twin Bridges publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Twin Bridges, not an official NOAA rating. Rankings still use Comfort Score 28/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 43.5°F · 24.0° from 67.5°F | 14/100 · F |
| Precipitation balance | 9.4 in · 25.6 from 35 in | 10/100 · F |
| Normal heat + freeze calendar | 214 calendar days | 7/100 · F |
| Frost-free season | 86 days/year | 0/100 · F |
Twin Bridges · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Twin Bridges'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
- 65.4°F
- Coldest month
- 23.3°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 Twin Bridges sits across the climate record
Three NOAA fields for Twin Bridges's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 87%
- Among 6,861 stations, Twin Bridges sits in the cooler third of annual means.
- Annual precipitation
- Drier than 95%
- Twin Bridges's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 45th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Twin Bridges compares across U.S. station-mapped locations
Twin Bridges's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
28 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
Twin Bridges's measured station temperature trend
MethodologyAcross 61 complete annual observations from 1957 to 2025, TWIN BRIDGES warmed at a fitted rate of 0.10°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Twin Bridges primary station fitted change +0.10 °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 | 35°F (2°C) | 13°F (-11°C) | 24°F (-4°C) | 0.2" | 30.1 | 0.0 |
| February | 40°F (4°C) | 15°F (-9°C) | 27°F (-3°C) | 0.2" | 26.7 | 0.0 |
| March | 49°F (10°C) | 22°F (-6°C) | 36°F (2°C) | 0.4" | 27.3 | 0.0 |
| April | 57°F (14°C) | 28°F (-2°C) | 43°F (6°C) | 0.8" | 21.4 | 0.0 |
| May | 66°F (19°C) | 36°F (2°C) | 51°F (11°C) | 1.7" | 9.4 | 0.1 |
| June | 75°F (24°C) | 43°F (6°C) | 59°F (15°C) | 2.2" | 1.4 | 1.1 |
| July | 85°F (29°C) | 46°F (8°C) | 65°F (19°C) | 0.9" | 0.1 | 8.5 |
| August | 83°F (29°C) | 43°F (6°C) | 63°F (17°C) | 0.8" | 1.0 | 6.5 |
| September | 74°F (23°C) | 37°F (3°C) | 55°F (13°C) | 0.9" | 9.7 | 0.8 |
| October | 59°F (15°C) | 28°F (-2°C) | 44°F (6°C) | 0.7" | 21.8 | 0.0 |
| November | 44°F (7°C) | 19°F (-7°C) | 32°F (0°C) | 0.3" | 26.9 | 0.0 |
| December | 35°F (1°C) | 12°F (-11°C) | 23°F (-5°C) | 0.3" | 30.1 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 27, short of 90°F on every date, while 214 dates carry a normal low at or below freezing, the coldest 11°F near December 21.
The freezing stretch
The normal low stays at or below 32°F into May 3, then returns to freezing around October 3, 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 June 3, when 40% of years recorded at least a hundredth of an inch. The driest is January 21 at 12%. Summed across the calendar, that is about 78 wet dates a year.
The widest day
August 5 carries the biggest normal gap between afternoon and dawn, 41°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Twin Bridges.
Where Twin Bridges 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 9 inches in a normal year lands this among the driest tenth of ranked stations.
Twin Bridges earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
3.4 days with precipitation
3.9 days with precipitation
4.8 days with precipitation
8.4 days with precipitation
11.0 days with precipitation
11.7 days with precipitation
6.4 days with precipitation
6.6 days with precipitation
5.5 days with precipitation
5.9 days with precipitation
4.8 days with precipitation
5.1 days with precipitation
Twin Bridges runs a summer-peaked wet season
40% of Twin Bridges'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 2.2", on a 42.1°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, July, taking 50% of the annual total between them.
- Driest month: February at 0.2".
- Winter share: 8% 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.
Twin Bridges is dry, and what does fall arrives gently
Only about 78 days a year record measurable precipitation here, 21% of the calendar, and they carry 9.4" 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 12 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.
Frost Dates & Growing Season
First Fall Freeze
September 2
50% probability date
Last Spring Freeze
June 8
50% probability date
Growing Season
86 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,934
Higher = more heating needed
Cooling Degree Days
118
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside MT closest to Twin Bridges 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 (44°F here).
- Alpena, MI 44°F · 0.0°F off
- Amery, WI 44°F · 0.0°F off
- Blanca, CO 44°F · 0.0°F off
- Cross Village, MI 44°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (9.4" here), excluding temperature-peer places.
- Altamont, UT 9.4" · 0.0" off
- Duchesne, UT 9.4" · 0.0" off
- Kemmerer, WY 9.4" · 0.0" off
- Los Banos, CA 9.5" · 0.0" off
Scarce-water calendar
Where Twin Bridges's limited precipitation lands
heating led · dry · mid swing
Twin Bridges's energy balance leans toward cold weather: 7,934 annual heating degree days against 118 for cooling. Its 42.1°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 86 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 Twin Bridges's middle-range seasonal profile. The measured spread is 42.1°F. The annual average is 44°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Twin Bridges's cold-season load does not imply a wet climate. Annual precipitation is 9.4 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.
Twin Bridges wettest normal
June
June concentrates the scarce annual total (9.4 inches).
Twin Bridges driest normal
January
January is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Twin Bridges's climate
How dry is Twin Bridges? ▼
How cold does Twin Bridges get in winter? ▼
How much energy does heating and cooling require in Twin Bridges? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Twin Bridges's primary station: TWIN BRIDGES (USC00248430). 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 an incorporated place (GEOID 3075475). Match rule for Twin Bridges: 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 Twin Bridges 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.