Castolon, TX 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 Castolon's primary NOAA station, CASTOLON.
The climate verdict for Castolon
Castolon, Texas is cooling-led and dry. Its 9.9 inches of annual precipitation pairs with an annual average of 73°F. It scores 77/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 70% of them.
- 73°F
- average temperature, NOAA 1991-2020 normal
- 77/100
- comfort score, above 70% of station-mapped location scores
- 9.9"
- precipitation, annual total
- 284 days
- frost-free days per growing season
Castolon: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00411524 · Castolon, TX 73°F mean · 9.9" precip
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-ARID · SWING-MID · COMF-TOP · LOAD-COOL · STN-1 · BOOK-FULL
- TEMP-HOT 73°F
- RANK-WARM #6,655
- PHOTO-FINISH ≈ Tacna
- PRCP-ARID 9.9"
- SWING-MID 37°F
- COMF-TOP 77/100
- LOAD-COOL 4,096 CDD
- STN-1 USC00411524
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Tacna, AZ (+ 0.3 °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 TX station list.
- Castolon (this station) 73°F
- Hot Mormon Flat, AZ 73°F
- Near Tacna, AZ 73°F
- Near Phoenix Deer Va…, AZ 73°F
- Cold Casa Grande, AZ 72°F
Castolon sits in Texas, the #4 hottest U.S. state at 66.2°F statewide annual average - see all 50 hottest states ranked by NOAA normals
Climate Living Index · Castolon
Castolon: 54/100 · grade D
Castolon publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Castolon, not an official NOAA rating. Rankings still use Comfort Score 77/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 284 days/year | 98/100 · A |
| Snowfall burden | 0.0 inches/year | 90/100 · A |
| Annual temperature balance | 72.8°F · 5.3° from 67.5°F | 84/100 · B |
| Normal heat + freeze calendar | 192 calendar days | 18/100 · F |
| Precipitation balance | 9.9 in · 25.1 from 35 in | 12/100 · F |
Castolon · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Castolon'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
- 89.4°F
- Coldest month
- 52.4°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 Castolon sits across the climate record
Three NOAA fields for Castolon'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, Castolon sits in the warmer third of annual means.
- Annual precipitation
- Drier than 94%
- Castolon's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 76%
- Warmest-to-coldest month gap for Castolon is compact versus 6,861 complete station-years.
How Castolon compares across U.S. station-mapped locations
Castolon's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
77 Top 30% score exceeds 70% 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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 69°F (21°C) | 36°F (2°C) | 52°F (11°C) | 0.4" | 0.0" | 10.5 | 0.1 |
| February | 75°F (24°C) | 42°F (5°C) | 59°F (15°C) | 0.3" | 0.0" | 3.0 | 1.6 |
| March | 83°F (29°C) | 48°F (9°C) | 66°F (19°C) | 0.3" | 0.0" | 0.8 | 10.5 |
| April | 92°F (33°C) | 57°F (14°C) | 75°F (24°C) | 0.4" | 0.0" | 0.0 | 20.5 |
| May | 100°F (38°C) | 67°F (19°C) | 83°F (29°C) | 0.8" | 0.0" | 0.0 | 28.3 |
| June | 104°F (40°C) | 75°F (24°C) | 89°F (32°C) | 1.4" | 0.0" | 0.0 | 29.4 |
| July | 102°F (39°C) | 75°F (24°C) | 89°F (32°C) | 1.7" | 0.0" | 0.0 | 29.8 |
| August | 102°F (39°C) | 75°F (24°C) | 89°F (31°C) | 1.5" | 0.0" | 0.0 | 29.7 |
| September | 96°F (36°C) | 70°F (21°C) | 83°F (28°C) | 1.6" | 0.0" | 0.0 | 25.8 |
| October | 89°F (32°C) | 59°F (15°C) | 74°F (23°C) | 0.8" | 0.0" | 0.1 | 18.0 |
| November | 78°F (25°C) | 46°F (8°C) | 62°F (16°C) | 0.5" | 0.0" | 1.4 | 3.2 |
| December | 69°F (21°C) | 37°F (3°C) | 53°F (12°C) | 0.3" | 0.0" | 9.6 | 0.1 |
The year, day by day
The year in Castolon runs from a mild 35°F around January 1 to 105°F at the peak near June 9, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from April 7 through October 15, covering 192 dates. The broader mild season, normal highs of 70°F or more, runs January 24 to December 9.
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 35°F around January 1.
Where the wet dates fall
The likeliest wet date is July 13, when 20% of years recorded at least a hundredth of an inch. The driest is March 22 at 5%. Summed across the calendar, that is about 40 wet dates a year.
The widest day
March 31 carries the biggest normal gap between afternoon and dawn, 36°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Castolon.
Where Castolon Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 192 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 10 inches in a normal year lands this among the driest tenth of ranked stations.
Castolon 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
2.5 days with precipitation
1.9 days with precipitation
1.4 days with precipitation
1.8 days with precipitation
3.9 days with precipitation
4.8 days with precipitation
6.4 days with precipitation
4.9 days with precipitation
4.7 days with precipitation
3.4 days with precipitation
1.8 days with precipitation
2.4 days with precipitation
Castolon runs a summer-peaked wet season
47% of Castolon'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 1.7", on a 37°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, September, August, taking 48% of the annual total between them.
- Driest month: December at 0.3".
- 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 Castolon's precipitation splits across the calendar
About 40 days a year record measurable precipitation here, carrying 9.9" between them, or roughly 0.25 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.
Castolon'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
November 29
50% probability date
Last Spring Freeze
February 18
50% probability date
Growing Season
284 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,239
Higher = more heating needed
Cooling Degree Days
4,096
Higher = more cooling needed
Warmest Month
June
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TX closest to Castolon 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).
- Leesburg, FL 73°F · 0.0°F off
- Sebring, FL 73°F · 0.0°F off
- Imperial, CA 73°F · 0.2°F off
- Orlando, FL 73°F · 0.2°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (9.9" here), excluding temperature-peer places.
- Woodruff, UT 9.9" · 0.0" off
- Jeffrey City, WY 9.9" · 0.0" off
- Castle Valley, UT 9.8" · 0.0" off
- Fruita, CO 9.9" · 0.0" off
Scarce-water calendar
Where Castolon's limited precipitation lands
cooling led · dry · mid swing
Air-conditioning demand is the clearest thermal signal here. Castolon accumulates 4,096 cooling degree days, more than twice its 1,239 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: Castolon receives 9.9 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.
June and January mark the typical warm and cold ends of the calendar in Castolon's middle-range seasonal profile. The measured spread is 37.0°F. The annual average is 73°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Castolon has a long frost-free window of roughly 284 days, but the dry annual profile is a separate constraint. Growing-season length says when freezes are unlikely, not whether rainfall is sufficient.
Castolon wettest normal
July
July concentrates the scarce annual total (9.9 inches).
Castolon driest normal
December
December is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Castolon's climate
How dry is Castolon? ▼
How many days above 90°F does Castolon get? ▼
How much energy does heating and cooling require in Castolon? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Castolon's primary station: CASTOLON (USC00411524). 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 Castolon; 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 Castolon 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.