Nashua, MT Climate: Temperature 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 Nashua's primary NOAA station, NASHUA #2.
The climate verdict for Nashua
Winter sets the terms in Nashua, Montana. A pronounced 58.1°F seasonal swing and heating demand above twice the cooling total frame an annual average of 44°F. July is the warmest month at 72°F and January the coldest at 14°F.
- 44°F
- average temperature, NOAA 1991-2020 normal
- 135 days
- frost-free growing season
Nashua: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00245983 · Nashua, MT 44°F mean
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-UNK · SWING-WIDE · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-COOL 44°F
- RANK-COOL #1,098
- PHOTO-FINISH ≈ Gettysburg
- PRCP-UNK Rain n/a
- SWING-WIDE 58°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 8,134 HDD
- STN-1 USC00245983
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Gettysburg, SD (+ 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.
- Nashua (this station) 44°F
- Cold Andover, SD 44°F
- Hot Pollock, SD 44°F
- Near Gettysburg, SD 44°F
- Near St Croix Falls, WI 44°F
Nashua 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 · Nashua
Nashua: 19/100 · grade F
Nashua publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Nashua, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 183 calendar days | 23/100 · F |
| Annual temperature balance | 44.3°F · 23.2° from 67.5°F | 17/100 · F |
| Frost-free season | 135 days/year | 15/100 · F |
Nashua · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Nashua sits across the climate record
Available NOAA 1991–2020 fields for Nashua are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- Cooler than 84%
- Among 6,861 stations, Nashua sits in the cooler third of annual means.
- Seasonal temperature swing
- Wider than 96%
- Warmest-to-coldest month gap for Nashua 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 | 26°F (-3°C) | 3°F (-16°C) | 14°F (-10°C) | N/A | 30.7 | 0.0 |
| February | 31°F (-1°C) | 8°F (-14°C) | 19°F (-7°C) | N/A | 27.8 | 0.0 |
| March | 45°F (7°C) | 19°F (-7°C) | 32°F (0°C) | N/A | 27.5 | 0.0 |
| April | 61°F (16°C) | 32°F (0°C) | 46°F (8°C) | N/A | 14.4 | 0.1 |
| May | 71°F (22°C) | 42°F (6°C) | 56°F (14°C) | N/A | 5.0 | 0.7 |
| June | 79°F (26°C) | 52°F (11°C) | 66°F (19°C) | N/A | 0.1 | 3.3 |
| July | 88°F (31°C) | 57°F (14°C) | 72°F (22°C) | N/A | 0.0 | 16.8 |
| August | 88°F (31°C) | 56°F (13°C) | 72°F (22°C) | N/A | 0.0 | 15.1 |
| September | 76°F (24°C) | 45°F (7°C) | 60°F (16°C) | N/A | 2.2 | 4.3 |
| October | 59°F (15°C) | 32°F (0°C) | 45°F (7°C) | N/A | 16.5 | 0.0 |
| November | 42°F (5°C) | 18°F (-8°C) | 30°F (-1°C) | N/A | 28.0 | 0.0 |
| December | 29°F (-2°C) | 7°F (-14°C) | 18°F (-8°C) | N/A | 31.0 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 89°F around August 1, short of 90°F on every date, while 183 dates carry a normal low at or below freezing, the coldest 2°F near January 15.
The freezing stretch
The normal low stays at or below 32°F into April 16, then returns to freezing around October 17, covering 183 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
August 30 carries the biggest normal gap between afternoon and dawn, 33°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Nashua.
Where Nashua Stands Nationally
Freezing is routine here by normals standards — the normal low reaches 32°F or colder on about 183 nights a year, more than most ranked stations.
Daily temperature swings run wider than most of the country, peaking near 33°F between the normal high and low.
Nashua 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 24
50% probability date
Last Spring Freeze
May 12
50% probability date
Growing Season
135 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,134
Higher = more heating needed
Cooling Degree Days
615
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MT closest to Nashua 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).
- Gettysburg, SD 44°F · 0.0°F off
- Harrold, SD 44°F · 0.0°F off
- Jim Falls, WI 44°F · 0.0°F off
- Kewaunee, WI 44°F · 0.0°F off
Data-derived climate profile
How Nashua's climate pattern fits together
heating led · high swing
Winter and seasonal range jointly define this record. Nashua logs 8,134 heating degree days, more than twice its 615 cooling total, while the typical coldest-to-warmest-month gap reaches 58.1°F. The annual mean therefore compresses two materially different seasons.
Only about 135 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.
Nashua's calendar has a pronounced split: July and January mark the typical warm and cold ends of the calendar, with 58.1°F between them. The annual average is 44°F. That average is context, while the monthly highs, lows, and precipitation totals describe the lived parts of the year.
A moisture-range label is withheld because Nashua'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 Nashua'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 Nashua, not an official NOAA class or a year-ahead forecast.
Questions about Nashua's climate
How many days above 90°F does Nashua get? ▼
How much energy does heating and cooling require in Nashua? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Nashua's primary station: NASHUA #2 (USC00245983). 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 3052900). Match rule for Nashua: 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 Nashua 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.