Twentynine Palms, CA Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Twentynine Palms's primary NOAA station, TWENTYNINE PALMS.
The climate verdict for Twentynine Palms
Twentynine Palms, California is cooling-led and dry. Its 3.9 inches of annual precipitation pairs with an annual average of 70°F. It scores 76/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 69% of them.
- 70°F
- average temperature, NOAA 1991-2020 normal
- 76/100
- comfort score, above 69% of station-mapped location scores
- 3.9"
- precipitation, annual total
- 320 days
- frost-free days per growing season
Twentynine Palms: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00049099 · Twentynine Palms, CA 70°F mean · 3.9" precip
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-ARID · SWING-MID · COMF-TOP · LOAD-COOL · STN-1 · BOOK-FULL
- TEMP-HOT 70°F
- RANK-WARM #6,518
- PHOTO-FINISH ≈ Terlingua
- PRCP-ARID 3.9"
- SWING-MID 40°F
- COMF-TOP 76/100
- LOAD-COOL 3,482 CDD
- STN-1 USC00049099
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Terlingua, TX (+ 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 CA station list.
- Hot Hayfield Pumpin…, CA 71°F
- Twentynine Palms (this station) 70°F
- Cold Wittmann, AZ 70°F
- Near Terlingua, TX 70°F
- Near Langtry, TX 70°F
Climate Living Index · Twentynine Palms
Twentynine Palms: 61/100 · grade C
Twentynine Palms publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Twentynine Palms, not an official NOAA rating. Rankings still use Comfort Score 76/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 320 days/year | 100/100 · A |
| Annual temperature balance | 70.3°F · 2.8° from 67.5°F | 91/100 · A |
| Normal heat + freeze calendar | 140 calendar days | 53/100 · D |
| Precipitation balance | 3.9 in · 31.1 from 35 in | 0/100 · F |
Twentynine Palms · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Twentynine Palms's normals sit in a dry climate class: BWh
Annual precipitation falls well below the aridity threshold for this temperature regime, so the normals classify as hot desert (BWh). Class BWh is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically hot desert.
- Köppen code
- BWh
- Group
- Dry (arid or semi-arid)
- Warmest month
- 90.7°F
- Coldest month
- 50.9°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 · cooling-led station
Where Twentynine Palms sits across the climate record
Three NOAA fields for Twentynine Palms's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 5% warmest
- Among 6,861 stations, Twentynine Palms sits in the warmer third of annual means.
- Annual precipitation
- Drier than 100%
- Twentynine Palms's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 35th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Twentynine Palms compares across U.S. station-mapped locations
Twentynine Palms's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
76 Top 31% score exceeds 69% 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
Twentynine Palms's measured station temperature trend
MethodologyAcross 61 complete annual observations from 1936 to 2025, TWENTYNINE PALMS warmed at a fitted rate of 0.28°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Twentynine Palms primary station fitted change +0.28 °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 | 63°F (17°C) | 42°F (5°C) | 53°F (11°C) | 0.5" | 4.8 | 0.0 |
| February | 67°F (20°C) | 44°F (7°C) | 56°F (13°C) | 0.6" | 2.4 | 0.0 |
| March | 74°F (23°C) | 49°F (10°C) | 62°F (17°C) | 0.3" | 0.5 | 1.0 |
| April | 81°F (27°C) | 55°F (13°C) | 68°F (20°C) | 0.1" | 0.0 | 6.5 |
| May | 90°F (32°C) | 63°F (17°C) | 76°F (25°C) | 0.1" | 0.0 | 19.2 |
| June | 99°F (37°C) | 71°F (22°C) | 85°F (30°C) | 0.0" | 0.0 | 27.9 |
| July | 104°F (40°C) | 77°F (25°C) | 91°F (33°C) | 0.4" | 0.0 | 30.9 |
| August | 103°F (39°C) | 76°F (25°C) | 90°F (32°C) | 0.7" | 0.0 | 30.8 |
| September | 97°F (36°C) | 69°F (21°C) | 83°F (28°C) | 0.3" | 0.0 | 26.8 |
| October | 85°F (29°C) | 58°F (14°C) | 71°F (22°C) | 0.1" | 0.2 | 11.3 |
| November | 72°F (22°C) | 47°F (8°C) | 59°F (15°C) | 0.2" | 2.2 | 0.0 |
| December | 62°F (17°C) | 40°F (4°C) | 51°F (11°C) | 0.6" | 6.4 | 0.0 |
The year, day by day
The year in Twentynine Palms runs from a mild 39°F around December 15 to 104°F at the peak near July 15, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from May 17 through October 3, covering 140 dates. The broader mild season, normal highs of 70°F or more, runs February 29 to November 19.
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.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 39°F around December 15.
Where the wet dates fall
The likeliest wet date is January 9, when 12% of years recorded at least a hundredth of an inch. The driest is June 9 at 1%. Summed across the calendar, that is about 21 wet dates a year.
The widest day
June 10 carries the biggest normal gap between afternoon and dawn, 29°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Twentynine Palms.
Where Twentynine Palms Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 140 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
Aridity defines the water calendar: about 4 inches in a normal year lands this among the driest tenth of ranked stations.
Twentynine Palms earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
3.9 days with precipitation
3.2 days with precipitation
2.3 days with precipitation
1.0 days with precipitation
0.6 days with precipitation
0.1 days with precipitation
1.7 days with precipitation
2.3 days with precipitation
1.7 days with precipitation
1.1 days with precipitation
1.0 days with precipitation
2.2 days with precipitation
Twentynine Palms's wet season runs through the cold months
December, January and February carry 42% of the year's precipitation here, while June through August contribute 27%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows a 39.8°F seasonal spread.
- Wettest month
- August, 0.7"
- Driest month
- June, 0.0"
- Wettest three months
- August, February, December (46% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
Twentynine Palms is dry, and what does fall arrives gently
Only about 21 days a year record measurable precipitation here, 6% of the calendar, and they carry 3.9" between them. At roughly 0.18 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 January at about 4 wet days; the driest is June at about 0.
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
December 10
50% probability date
Last Spring Freeze
January 24
50% probability date
Growing Season
320 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,511
Higher = more heating needed
Cooling Degree Days
3,482
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Twentynine Palms 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 (70°F here).
- Boothville, LA 70°F · 0.0°F off
- Buras, LA 70°F · 0.0°F off
- Deland, FL 70°F · 0.0°F off
- Folkston, GA 70°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (3.9" here), excluding temperature-peer places.
- Tacna, AZ 3.8" · 0.1" off
- Yuma, AZ 4.0" · 0.1" off
- Ehrenberg, AZ 4.0" · 0.2" off
- Wendover, UT 3.6" · 0.3" off
Scarce-water calendar
Where Twentynine Palms's limited precipitation lands
cooling led · dry · mid swing
Air-conditioning demand is the clearest thermal signal here. Twentynine Palms accumulates 3,482 cooling degree days, more than twice its 1,511 heating total; the monthly table shows when that imbalance builds rather than treating it as a year-round condition.
Heat demand sits beside limited local precipitation: Twentynine Palms receives 3.9 inches in a normal year, inside PlainClimate's dry range. Snowfall is not added to the interpretation because its annual value is missing. Month-level precipitation is the useful check on when that small annual total arrives.
July and December mark the typical warm and cold ends of the calendar in Twentynine Palms's middle-range seasonal profile. The measured spread is 39.8°F. The annual average is 70°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Twentynine Palms has a long frost-free window of roughly 320 days, but the dry annual profile is a separate constraint. Growing-season length says when freezes are unlikely, not whether rainfall is sufficient.
Twentynine Palms wettest normal
August
August concentrates the scarce annual total (3.9 inches).
Twentynine Palms driest normal
June
June is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Twentynine Palms's climate
How dry is Twentynine Palms? ▼
How many days above 90°F does Twentynine Palms get? ▼
How much energy does heating and cooling require in Twentynine Palms? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Twentynine Palms's primary station: TWENTYNINE PALMS (USC00049099). 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 0680994). Match rule for Twentynine Palms: 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 Twentynine Palms 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.