Castle Hot Springs, AZ 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 Castle Hot Springs's primary NOAA station, CASTLE HOT SPRINGS.
The climate verdict for Castle Hot Springs
Castle Hot Springs, Arizona is cooling-led and dry. Its 14.3 inches of annual precipitation pairs with an annual average of 73°F. It scores 90/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 91% of them.
- 73°F
- annual average temperature (NOAA normal)
- 90/100
- comfort score, above 91% of station-mapped location scores
- 14.3"
- annual precipitation
- 341 days
- growing season, frost-free days
Castle Hot Springs: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00021353 · Castle Hot Springs, AZ 73°F mean · 14.3" precip
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-TOP · LOAD-COOL · STN-1 · BOOK-FULL
- TEMP-HOT 73°F
- RANK-WARM #6,655
- PHOTO-FINISH ≈ Dateland Whitew…
- PRCP-DRY 14.3"
- SWING-MID 36°F
- COMF-TOP 90/100
- LOAD-COOL 3,842 CDD
- STN-1 USC00021353
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Dateland Whitewing Rch, AZ ( -0.1 °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 AZ station list.
- Castle Hot Spri… (this station) 73°F
- Hot Crystal City, TX 73°F
- Near Dateland Whitew…, AZ 73°F
- Near Desert Resorts…, CA 73°F
- Cold Florence, AZ 72°F
Climate Living Index · Castle Hot Springs
Castle Hot Springs: 63/100 · grade C
Castle Hot Springs publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Castle Hot Springs, not an official NOAA rating. Rankings still use Comfort Score 90/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 341 days/year | 100/100 · A |
| Snowfall burden | 0.0 inches/year | 90/100 · A |
| Annual temperature balance | 72.6°F · 5.1° from 67.5°F | 84/100 · B |
| Normal heat + freeze calendar | 160 calendar days | 39/100 · F |
| Precipitation balance | 14.3 in · 20.7 from 35 in | 26/100 · F |
Castle Hot Springs · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Castle Hot Springs's normals sit in a dry climate class: BSh
Precipitation is low relative to temperature but above true desert thresholds: hot semi-arid steppe (BSh). Class BSh is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically hot semi-arid steppe.
- Köppen code
- BSh
- Group
- Dry (arid or semi-arid)
- Warmest month
- 91.2°F
- Coldest month
- 55.3°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 Castle Hot Springs sits across the climate record
Three NOAA fields for Castle Hot Springs's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 3% warmest
- Among 6,861 stations, Castle Hot Springs sits in the warmer third of annual means.
- Annual precipitation
- Drier than 85%
- Castle Hot Springs's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 80%
- Warmest-to-coldest month gap for Castle Hot Springs is compact versus 6,861 complete station-years.
How Castle Hot Springs compares across U.S. station-mapped locations
Castle Hot Springs's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
90 Top 9% score exceeds 91% 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%). Below this entry.
- 80–90: 921 station-mapped locations (15%). Below this entry.
- 90–100: 564 station-mapped locations (9%). This entry sits in this band.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Castle Hot Springs's measured station temperature trend
MethodologyAcross 39 complete annual observations from 1960 to 2016, CASTLE HOT SPRINGS warmed at a fitted rate of 0.30°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Castle Hot Springs primary station fitted change +0.30 °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 | 70°F (21°C) | 43°F (6°C) | 56°F (13°C) | 2.0" | 0.0" | 1.5 | 0.0 |
| February | 71°F (22°C) | 45°F (7°C) | 58°F (14°C) | 2.1" | 0.0" | 0.5 | 0.0 |
| March | 77°F (25°C) | 49°F (10°C) | 63°F (17°C) | 1.6" | 0.0" | 0.0 | 0.8 |
| April | 84°F (29°C) | 54°F (12°C) | 69°F (21°C) | 0.4" | 0.0" | 0.0 | 5.7 |
| May | 93°F (34°C) | 62°F (16°C) | 77°F (25°C) | 0.2" | 0.0" | 0.0 | 18.4 |
| June | 102°F (39°C) | 70°F (21°C) | 86°F (30°C) | 0.1" | 0.0" | 0.0 | 28.0 |
| July | 105°F (41°C) | 77°F (25°C) | 91°F (33°C) | 1.3" | 0.0" | 0.0 | 30.7 |
| August | 104°F (40°C) | 77°F (25°C) | 91°F (33°C) | 2.3" | 0.0" | 0.0 | 30.5 |
| September | 99°F (37°C) | 71°F (22°C) | 85°F (30°C) | 1.1" | 0.0" | 0.0 | 27.4 |
| October | 89°F (32°C) | 60°F (16°C) | 75°F (24°C) | 0.9" | 0.0" | 0.0 | 12.6 |
| November | 78°F (25°C) | 50°F (10°C) | 64°F (18°C) | 0.7" | 0.0" | 0.3 | 1.0 |
| December | 68°F (20°C) | 43°F (6°C) | 55°F (13°C) | 1.4" | 0.0" | 2.0 | 0.0 |
The year, day by day
The year in Castle Hot Springs runs from a mild 42°F around December 19 to 106°F at the peak near July 9, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from May 8 through October 14, covering 160 dates. The broader mild season, normal highs of 70°F or more, runs January 20 to December 4.
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 42°F around December 19.
Where the wet dates fall
The likeliest wet date is August 15, when 14% of years recorded at least a hundredth of an inch. The driest is June 9 at 2%. Summed across the calendar, that is about 28 wet dates a year.
The widest day
June 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 Castle Hot Springs.
Where Castle Hot Springs Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 160 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
A drier-than-most normal water year — around 14 inches, below what four out of five ranked stations collect.
Castle Hot Springs 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
3.0 days with precipitation
3.8 days with precipitation
3.0 days with precipitation
1.0 days with precipitation
0.9 days with precipitation
0.3 days with precipitation
2.5 days with precipitation
4.6 days with precipitation
2.2 days with precipitation
1.9 days with precipitation
1.7 days with precipitation
2.5 days with precipitation
Castle Hot Springs's wet season runs through the cold months
December, January and February carry 39% of the year's precipitation here, while June through August contribute 26%. 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 35.9°F seasonal spread.
- Wettest month
- August, 2.3"
- Driest month
- June, 0.1"
- Wettest three months
- August, February, January (45% 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.
When it rains in Castle Hot Springs, it arrives in quantity
14.3" of precipitation falls across only about 27 wet days here, averaging 0.52 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 27 a year, 8% of all days
- Average depth per wet day
- 0.52 inches
- Most wet days
- August, about 5
- Fewest wet days
- June, about 0
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Castle Hot Springs's record shows no measurable snowfall
This station measured snowfall across the 1991-2020 period and recorded none: the annual normal is 0.0 inches. That is a measured zero rather than missing data, which is a meaningful distinction here , most stations in the database simply do not report snow at all, and those pages say nothing about it.
A thirty-year normal of zero describes the typical year at this station. It is not a claim that snow has never fallen in the area.
Frost Dates & Growing Season
First Fall Freeze
December 22
50% probability date
Last Spring Freeze
January 15
50% probability date
Growing Season
341 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,046
Higher = more heating needed
Cooling Degree Days
3,842
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside AZ closest to Castle Hot Springs 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 (73°F here).
- Palm Bay, FL 73°F · 0.0°F off
- Sanford, FL 73°F · 0.0°F off
- Bruni, TX 73°F · 0.1°F off
- Kissimmee, FL 73°F · 0.1°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (14.3" here), excluding temperature-peer places.
- Fort Morgan, CO 14.3" · 0.0" off
- Lance Creek, WY 14.3" · 0.0" off
- Redstone, MT 14.3" · 0.0" off
- Ryegate, MT 14.3" · 0.0" off
Scarce-water calendar
Where Castle Hot Springs's limited precipitation lands
cooling led · dry · mid swing
Air-conditioning demand is the clearest thermal signal here. Castle Hot Springs accumulates 3,842 cooling degree days, more than twice its 1,046 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: Castle Hot Springs receives 14.3 inches in a normal year, inside PlainClimate's dry range. Recorded annual snowfall is negligible. 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 Castle Hot Springs's middle-range seasonal profile. The measured spread is 35.9°F. The annual average is 73°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
With about 341 frost-free days, the calendar is constrained more by sustained heat than by freeze timing. This does not measure crop suitability or soil moisture; it only reports the NOAA-derived frost-free window for Castle Hot Springs.
Castle Hot Springs wettest normal
August
August concentrates the scarce annual total (14.3 inches).
Castle Hot Springs driest normal
June
June is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Castle Hot Springs's climate
How dry is Castle Hot Springs? ▼
How many days above 90°F does Castle Hot Springs get? ▼
How much energy does heating and cooling require in Castle Hot Springs? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Castle Hot Springs's primary station: CASTLE HOT SPRINGS (USC00021353). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Castle Hot Springs; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Castle Hot Springs 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.