Garrison, ND Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Garrison's primary NOAA station, GARRISON - 2 stations mapped to the area.
The climate verdict for Garrison
Winter sets the terms in Garrison, North Dakota. A pronounced 57.1°F seasonal swing and heating demand above twice the cooling total frame an annual average of 41°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.
- 41°F
- average temperature, NOAA 1991-2020 normal
- 40/100
- comfort score, above 6% of station-mapped location scores
- 17.8"
- yearly precipitation total
- 135 days
- growing season, frost-free days
Garrison: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00094041 · Garrison, ND 41°F mean · 17.8" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-MULTI · BOOK-FULL
- TEMP-COOL 41°F
- RANK-COOL #480
- PHOTO-FINISH ≈ Isle
- PRCP-DRY 17.8"
- SWING-WIDE 57°F
- COMF-LOW 40/100
- LOAD-HEAT 9,063 HDD
- STN-MULTI USW00094041
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Isle, MN (+ 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 ND station list.
- Garrison (this station) 41°F
- Cold Bredette, MT 41°F
- Hot Brainerd, MN 41°F
- Near Isle, MN 41°F
- Near Hazelton, ND 41°F
Garrison sits in North Dakota, the #2 coldest U.S. state at 41.0°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Garrison
Garrison: 18/100 · grade F
Garrison publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Garrison, not an official NOAA rating. Rankings still use Comfort Score 40/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 17.8 in · 17.2 from 35 in | 39/100 · F |
| Normal heat + freeze calendar | 191 calendar days | 19/100 · F |
| Frost-free season | 135 days/year | 15/100 · F |
| Annual temperature balance | 41.0°F · 26.5° from 67.5°F | 7/100 · F |
Garrison · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Garrison is a continental Köppen climate: Dfb
Coldest-month mean 11.0°F and warmest-month mean 68.1°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 68.1°F
- Coldest month
- 11.0°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 Garrison sits across the climate record
Three NOAA fields for Garrison's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 93%
- Among 6,861 stations, Garrison sits in the cooler third of annual means.
- Annual precipitation
- Drier than 76%
- Garrison's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 95%
- Warmest-to-coldest month gap for Garrison is large versus 6,861 complete station-years.
How Garrison compares across U.S. station-mapped locations
Garrison'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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 21°F (-6°C) | 2°F (-17°C) | 11°F (-12°C) | 0.6" | N/A | 30.9 | 0.0 |
| February | 25°F (-4°C) | 5°F (-15°C) | 15°F (-10°C) | 0.5" | N/A | 27.9 | 0.0 |
| March | 37°F (3°C) | 17°F (-8°C) | 27°F (-3°C) | 0.7" | N/A | 29.1 | 0.0 |
| April | 53°F (12°C) | 29°F (-2°C) | 41°F (5°C) | 1.3" | N/A | 18.9 | 0.0 |
| May | 66°F (19°C) | 41°F (5°C) | 54°F (12°C) | 2.6" | N/A | 4.7 | 0.2 |
| June | 74°F (23°C) | 51°F (11°C) | 63°F (17°C) | 3.5" | N/A | 0.0 | 0.6 |
| July | 81°F (27°C) | 56°F (13°C) | 68°F (20°C) | 2.6" | N/A | 0.0 | 3.8 |
| August | 81°F (27°C) | 54°F (12°C) | 68°F (20°C) | 1.8" | N/A | 0.0 | 4.9 |
| September | 71°F (22°C) | 45°F (7°C) | 58°F (14°C) | 1.7" | N/A | 1.1 | 1.4 |
| October | 54°F (12°C) | 32°F (0°C) | 43°F (6°C) | 1.2" | N/A | 15.3 | 0.0 |
| November | 38°F (3°C) | 19°F (-7°C) | 28°F (-2°C) | 0.6" | N/A | 27.0 | 0.0 |
| December | 25°F (-4°C) | 7°F (-14°C) | 16°F (-9°C) | 0.7" | N/A | 30.9 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 83°F around August 2, short of 90°F on every date, while 191 dates carry a normal low at or below freezing, the coldest 1°F near January 21.
The freezing stretch
The normal low stays at or below 32°F into April 24, then returns to freezing around October 17, covering 191 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 11, when 41% of years recorded at least a hundredth of an inch. The driest is November 22 at 21%. Summed across the calendar, that is about 102 wet dates a year.
The widest day
August 17 carries the biggest normal gap between afternoon and dawn, 27°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Garrison.
Where Garrison Stands Nationally
Freezing is routine here by normals standards — the normal low reaches 32°F or colder on about 191 nights a year, more than most ranked stations.
Garrison earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
8.9 days with precipitation
7.4 days with precipitation
8.0 days with precipitation
8.7 days with precipitation
10.3 days with precipitation
12.2 days with precipitation
9.7 days with precipitation
8.2 days with precipitation
7.1 days with precipitation
7.7 days with precipitation
6.3 days with precipitation
7.8 days with precipitation
Garrison runs a summer-peaked wet season
45% of Garrison'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 3.5", on a wide 57.1°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: June, July, May, taking 49% of the annual total between them.
- Driest month: February at 0.5".
- 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.
Garrison is dry, and what does fall arrives gently
Only about 102 days a year record measurable precipitation here, 28% of the calendar, and they carry 17.8" between them. At roughly 0.17 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 November at about 6.
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 26
50% probability date
Last Spring Freeze
May 14
50% probability date
Growing Season
135 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,063
Higher = more heating needed
Cooling Degree Days
338
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside ND closest to Garrison 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 (41°F here).
- Baraga, MI 41°F · 0.0°F off
- Isle, MN 41°F · 0.0°F off
- Medicine Lake, MT 41°F · 0.0°F off
- Yaak, MT 41°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (17.8" here), excluding temperature-peer places.
- Superior, AZ 17.8" · 0.0" off
- Ulysses, KS 17.8" · 0.0" off
- Pollock, SD 17.8" · 0.0" off
- Hart, TX 17.7" · 0.1" off
Data-derived climate profile
How Garrison's climate pattern fits together
heating led · dry · high swing
Winter and seasonal range jointly define this record. Garrison logs 9,063 heating degree days, more than twice its 338 cooling total, while the typical coldest-to-warmest-month gap reaches 57.1°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.
July and January mark the typical warm and cold ends of the calendar in this dry, high-range record. The gap is 57.1°F, so a single annual figure is especially lossy; the annual average is 41°f. Compare monthly temperature and precipitation together before drawing a seasonal conclusion about Garrison.
Garrison's cold-season load does not imply a wet climate. Annual precipitation is 17.8 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.
These labels group NOAA 1991-2020 normals from Garrison'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 Garrison, not an official NOAA class or a year-ahead forecast.
Questions about Garrison'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 Garrison's primary station: GARRISON (USW00094041). 2 NOAA stations are mapped to the Garrison area; the primary station's record is used for consistency. 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 3829460). Match rule for Garrison: 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 Garrison 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.