Fort Sumner, NM Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Fort Sumner's primary NOAA station, FT SUMNER - 2 stations mapped to the area.
The climate verdict for Fort Sumner
Dryness leads the climate profile for Fort Sumner, New Mexico, with 15.1 inches of precipitation a year. NOAA records an annual average of 59°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 59°F
- annual average temperature (NOAA normal)
- 68/100
- comfort score, above 56% of station-mapped location scores
- 15.1"
- annual precipitation · 9" snow
- 204 days
- growing season, frost-free days
Fort Sumner: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00293294 · Fort Sumner, NM 59°F mean · 15.1" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-MID · LOAD-HEAT · STN-MULTI · BOOK-FULL
- TEMP-MILD 59°F
- RANK-UPPER #4,940
- PHOTO-FINISH ≈ Tellico Plains
- PRCP-DRY 15.1"
- SWING-MID 39°F
- COMF-MID 68/100
- LOAD-HEAT 3,588 HDD
- STN-MULTI USC00293294
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Tellico Plains, TN (+ 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 NM station list.
- Fort Sumner (this station) 59°F
- Hot Smithville, OK 59°F
- Near Tellico Plains, TN 59°F
- Near New Hill, NC 59°F
- Near Las Cruces, NM 59°F
Climate Living Index · Fort Sumner
Fort Sumner: 51/100 · grade D
Fort Sumner publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Fort Sumner, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 59.2°F · 8.3° from 67.5°F | 74/100 · B |
| Frost-free season | 204 days/year | 67/100 · C |
| Snowfall burden | 9.1 inches/year | 65/100 · C |
| Normal heat + freeze calendar | 175 calendar days | 29/100 · F |
| Precipitation balance | 15.1 in · 19.9 from 35 in | 29/100 · F |
Fort Sumner · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Fort Sumner'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
- 79.0°F
- Coldest month
- 39.7°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 Fort Sumner sits across the climate record
Three NOAA fields for Fort Sumner's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 28% warmest
- Among 6,861 stations, Fort Sumner sits in the warmer third of annual means.
- Annual precipitation
- Drier than 83%
- Fort Sumner's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 33rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Fort Sumner compares across U.S. station-mapped locations
Fort Sumner's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% 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%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 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 | 55°F (13°C) | 25°F (-4°C) | 40°F (4°C) | 0.5" | 3.0" | 27.7 | 0.0 |
| February | 60°F (15°C) | 28°F (-2°C) | 44°F (7°C) | 0.5" | 1.3" | 21.6 | 0.0 |
| March | 67°F (20°C) | 35°F (2°C) | 51°F (11°C) | 0.7" | 1.0" | 13.8 | 0.0 |
| April | 74°F (23°C) | 43°F (6°C) | 59°F (15°C) | 1.4" | 0.2" | 3.5 | 0.5 |
| May | 82°F (28°C) | 52°F (11°C) | 67°F (19°C) | 1.2" | 0.0" | 0.0 | 6.0 |
| June | 91°F (33°C) | 62°F (17°C) | 76°F (25°C) | 1.5" | 0.0" | 0.0 | 16.6 |
| July | 92°F (33°C) | 66°F (19°C) | 79°F (26°C) | 2.6" | 0.0" | 0.0 | 20.8 |
| August | 90°F (32°C) | 65°F (18°C) | 77°F (25°C) | 2.3" | 0.0" | 0.0 | 17.4 |
| September | 84°F (29°C) | 57°F (14°C) | 70°F (21°C) | 1.6" | 0.0" | 0.0 | 6.2 |
| October | 74°F (24°C) | 44°F (7°C) | 59°F (15°C) | 1.9" | 0.3" | 2.6 | 0.3 |
| November | 63°F (17°C) | 33°F (0°C) | 48°F (9°C) | 0.4" | 0.7" | 17.7 | 0.0 |
| December | 55°F (13°C) | 25°F (-4°C) | 40°F (4°C) | 0.6" | 2.6" | 27.0 | 0.0 |
The year, day by day
Fort Sumner works both ends of the calendar. Normal highs climb to 92°F by June 27 and hold at or above 90°F on 68 dates, then normal lows drop to freezing or below on 107 dates, bottoming at 24°F around January 1.
When the heat sits
Normal highs reach 90°F from June 11 through August 17, covering 68 dates. The broader mild season, normal highs of 70°F or more, runs March 25 to October 28.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
The freezing stretch
The normal low stays at or below 32°F into March 2, then returns to freezing around November 17, covering 107 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 July 31, when 29% of years recorded at least a hundredth of an inch. The driest is January 19 at 11%. Summed across the calendar, that is about 62 wet dates a year.
The widest day
March 28 carries the biggest normal gap between afternoon and dawn, 32°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Fort Sumner.
Where Fort Sumner Stands Nationally
Heat is a defining feature of the normals calendar — the normal daily high reaches 90°F on roughly 68 days a year, more than four out of five ranked stations record.
A drier-than-most normal water year — around 15 inches, below what four out of five ranked stations collect.
Fort Sumner earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 3.0"
3.3 days with precipitation
Snow: 1.3"
3.5 days with precipitation
Snow: 1.0"
4.5 days with precipitation
Snow: 0.2"
4.0 days with precipitation
5.4 days with precipitation
6.2 days with precipitation
8.0 days with precipitation
8.4 days with precipitation
6.0 days with precipitation
Snow: 0.3"
5.0 days with precipitation
Snow: 0.7"
3.2 days with precipitation
Snow: 2.6"
4.1 days with precipitation
Fort Sumner runs a summer-peaked wet season
42% of Fort Sumner'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 July at 2.6", on a 39.3°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: July, August, October, taking 45% of the annual total between them.
- Driest month: November 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.
How Fort Sumner's precipitation splits across the calendar
About 62 days a year record measurable precipitation here, carrying 15.1" between them, or roughly 0.24 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Snow reaches Fort Sumner, but rarely amounts to much
The normals record 9.1 inches of snow a year here, most likely in January. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 5 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
October 30
50% probability date
Last Spring Freeze
April 9
50% probability date
Growing Season
204 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,588
Higher = more heating needed
Cooling Degree Days
1,504
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside NM closest to Fort Sumner 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 (59°F here).
- Clarendon, TX 59°F · 0.0°F off
- Covington, TN 59°F · 0.0°F off
- Eastville, VA 59°F · 0.0°F off
- Kentfield, CA 59°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (15.1" here), excluding temperature-peer places.
- Broadwater, NE 15.1" · 0.0" off
- Heber, UT 15.1" · 0.0" off
- Bly, OR 15.1" · 0.0" off
- Guernsey, WY 15.1" · 0.0" off
Data-derived climate profile
How Fort Sumner's climate pattern fits together
heating led · dry · mid swing
Fort Sumner's energy balance leans toward cold weather: 3,588 annual heating degree days against 1,504 for cooling. Its 39.3°F seasonal range still makes the monthly rows more useful than the annual average alone.
Fort Sumner's frost-free season lasts about 204 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Fort Sumner's middle-range seasonal profile. The measured spread is 39.3°F. The annual average is 59°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Fort Sumner's cold-season load does not imply a wet climate. Annual precipitation is 15.1 inches, which places the station in PlainClimate's dry range. Annual snowfall totals 9.1 inches. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
These labels group NOAA 1991-2020 normals from Fort Sumner'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 Fort Sumner, not an official NOAA class or a year-ahead forecast.
Questions about Fort Sumner's climate
How much rain does Fort Sumner get? ▼
How many days above 90°F does Fort Sumner get? ▼
How much energy does heating and cooling require in Fort Sumner? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Fort Sumner's primary station: FT SUMNER (USC00293294). 2 NOAA stations are mapped to the Fort Sumner 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 3527340). Match rule for Fort Sumner: 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 Fort Sumner 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.