San Jon, 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 San Jon's primary NOAA station, SAN JON.
The climate verdict for San Jon
Dryness leads the climate profile for San Jon, New Mexico, with 17.0 inches of precipitation a year. NOAA records an annual average of 60°F. It scores 78/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 72% of them.
- 60°F
- average temperature, NOAA 1991-2020 normal
- 78/100
- comfort score, above 72% of station-mapped location scores
- 17.0"
- annual precipitation · 17" snow
- 189 days
- frost-free days per growing season
San Jon: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00297867 · San Jon, NM 60°F mean · 17.0" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 60°F
- RANK-UPPER #5,214
- PHOTO-FINISH ≈ Albemarle
- PRCP-DRY 17.0"
- SWING-MID 41°F
- COMF-TOP 78/100
- LOAD-MIX H/C balanced
- STN-1 USC00297867
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Albemarle, NC (+ 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.
- San Jon (this station) 60°F
- Hot John H Kerr Dam, VA 60°F
- Near Albemarle, NC 60°F
- Near Caruthersville, MO 60°F
- Near Fort Cobb, OK 60°F
Climate Living Index · San Jon
San Jon: 46/100 · grade D
San Jon publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for San Jon, not an official NOAA rating. Rankings still use Comfort Score 78/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 60.3°F · 7.2° from 67.5°F | 77/100 · B |
| Frost-free season | 189 days/year | 56/100 · C |
| Snowfall burden | 17.1 inches/year | 53/100 · D |
| Precipitation balance | 17.0 in · 18.0 from 35 in | 36/100 · F |
| Normal heat + freeze calendar | 199 calendar days | 14/100 · F |
San Jon · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
San Jon'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
- 81.0°F
- Coldest month
- 40.2°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 · balanced station
Where San Jon sits across the climate record
Three NOAA fields for San Jon's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 24% warmest
- Among 6,861 stations, San Jon sits in the warmer third of annual means.
- Annual precipitation
- Drier than 78%
- San Jon's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 39th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How San Jon compares across U.S. station-mapped locations
San Jon's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
78 Top 28% score exceeds 72% 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%). Below this entry.
- 70–80: 650 station-mapped locations (11%). This entry sits in this band.
- 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
San Jon's measured station temperature trend
MethodologyAcross 72 complete annual observations from 1910 to 2018, SAN JON warmed at a fitted rate of 0.06°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- San Jon primary station fitted change +0.06 °C/decade
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) | 26°F (-4°C) | 40°F (5°C) | 0.7" | 4.3" | 24.5 | 0.0 |
| February | 59°F (15°C) | 28°F (-2°C) | 44°F (7°C) | 0.4" | 1.8" | 19.5 | 0.0 |
| March | 68°F (20°C) | 36°F (2°C) | 52°F (11°C) | 1.1" | 2.1" | 11.5 | 0.1 |
| April | 75°F (24°C) | 43°F (6°C) | 59°F (15°C) | 1.1" | 0.9" | 4.3 | 0.9 |
| May | 84°F (29°C) | 53°F (11°C) | 68°F (20°C) | 1.8" | 0.1" | 0.2 | 8.5 |
| June | 93°F (34°C) | 62°F (17°C) | 78°F (25°C) | 2.1" | 0.0" | 0.0 | 20.8 |
| July | 95°F (35°C) | 67°F (19°C) | 81°F (27°C) | 2.7" | 0.0" | 0.0 | 25.3 |
| August | 93°F (34°C) | 65°F (18°C) | 79°F (26°C) | 2.4" | 0.0" | 0.0 | 21.9 |
| September | 87°F (30°C) | 58°F (14°C) | 72°F (22°C) | 1.4" | 0.0" | 0.0 | 10.8 |
| October | 76°F (24°C) | 45°F (7°C) | 61°F (16°C) | 1.7" | 0.5" | 2.3 | 1.6 |
| November | 64°F (18°C) | 34°F (1°C) | 49°F (10°C) | 0.7" | 2.0" | 13.3 | 0.1 |
| December | 55°F (13°C) | 26°F (-3°C) | 40°F (5°C) | 0.8" | 5.4" | 23.9 | 0.0 |
The year, day by day
San Jon works both ends of the calendar. Normal highs climb to 96°F by July 3 and hold at or above 90°F on 96 dates, then normal lows drop to freezing or below on 103 dates, bottoming at 25°F around January 1.
When the heat sits
Normal highs reach 90°F from June 2 through September 5, covering 96 dates. The broader mild season, normal highs of 70°F or more, runs March 24 to October 31.
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 3, then returns to freezing around November 22, covering 103 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 25% of years recorded at least a hundredth of an inch. The driest is January 23 at 9%. Summed across the calendar, that is about 51 wet dates a year.
The widest day
April 2 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 San Jon.
Where San Jon Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 96 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
Daily temperature swings run wider than most of the country, peaking near 33°F between the normal high and low.
San Jon 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: 4.3"
2.7 days with precipitation
Snow: 1.8"
2.4 days with precipitation
Snow: 2.1"
3.2 days with precipitation
Snow: 0.9"
3.2 days with precipitation
Snow: 0.1"
4.7 days with precipitation
6.1 days with precipitation
6.7 days with precipitation
7.2 days with precipitation
4.6 days with precipitation
Snow: 0.5"
3.8 days with precipitation
Snow: 2.0"
2.7 days with precipitation
Snow: 5.4"
3.4 days with precipitation
San Jon runs a summer-peaked wet season
43% of San Jon'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 2.7", on a 40.8°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, June, taking 43% of the annual total between them.
- Driest month: February at 0.4".
- Winter share: 11% 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 San Jon's precipitation splits across the calendar
About 51 days a year record measurable precipitation here, carrying 17.0" between them, or roughly 0.33 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.
Winter brings real snow to San Jon
San Jon averages 17.1 inches of snowfall a year, with December the snowiest month on the normals, spread across roughly 6 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 17.1 inches of depth.
- Days recording measurable snow: about 6 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 10% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 24
50% probability date
Last Spring Freeze
April 18
50% probability date
Growing Season
189 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,503
Higher = more heating needed
Cooling Degree Days
1,814
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside NM closest to San Jon 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 (60°F here).
- Albemarle, NC 60°F · 0.0°F off
- Caruthersville, MO 60°F · 0.0°F off
- Fort Cobb, OK 60°F · 0.0°F off
- King City, CA 60°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (17.0" here), excluding temperature-peer places.
- Yampa, CO 16.9" · 0.0" off
- Big Timber, MT 16.9" · 0.0" off
- Joseph, OR 16.9" · 0.0" off
- Syracuse, KS 17.0" · 0.1" off
Snow and freeze rhythm
When cold and snow define San Jon
mixed demand · dry · mid swing
Local precipitation is sparse in this otherwise mixed profile. The station reports 17.0 inches annually, within PlainClimate's dry band. Annual snowfall totals 17.1 inches. The monthly distribution matters because the total alone does not reveal the timing.
July and January mark the typical warm and cold ends of the calendar in San Jon's middle-range seasonal profile. The measured spread is 40.8°F. The annual average is 60°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
-
1. San Jon coldest normal
January
The coldest month still averages 40°F (5°C), above freezing, so this calendar has no hard winter.
-
2. San Jon typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. San Jon snow peak
December
San Jon averages 17.1 inches of snow a year, with December the snowiest month on the normals.
Questions about San Jon's climate
How much snow does San Jon get? ▼
How many days above 90°F does San Jon get? ▼
How much energy does heating and cooling require in San Jon? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from San Jon's primary station: SAN JON (USC00297867). 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 3568150). Match rule for San Jon: 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 San Jon 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.