Del Rio, TX Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Del Rio's primary NOAA station, DEL RIO INTL AP - 2 stations mapped to the area.
The climate verdict for Del Rio
Del Rio, Texas is cooling-led and dry. Its 19.8 inches of annual precipitation pairs with an annual average of 74°F. It scores 87/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 87% of them.
- 74°F
- yearly average temperature, NOAA normal
- 87/100
- comfort score, above 87% of station-mapped location scores
- 19.8"
- yearly precipitation total
- 290 days
- growing season, frost-free days
Del Rio: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00022010 · Del Rio, TX 74°F mean · 19.8" precip
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-TOP · LOAD-COOL · STN-MULTI · BOOK-FULL
- TEMP-HOT 74°F
- RANK-WARM #6,724
- PHOTO-FINISH ≈ Brawley
- PRCP-DRY 19.8"
- SWING-MID 34°F
- COMF-TOP 87/100
- LOAD-COOL 4,233 CDD
- STN-MULTI USW00022010
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Brawley, CA ( -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 TX station list.
- Del Rio (this station) 74°F
- Cold Ajo, AZ 74°F
- Near Brawley, CA 74°F
- Near Imperial County, CA 74°F
- Near Eagle Mtn, CA 74°F
Del Rio 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 · Del Rio
Del Rio: 62/100 · grade C
Del Rio publishes all six Living Index dimensions from NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals.
PlainClimate-derived for Del Rio, not an official NOAA rating. Rankings still use Comfort Score 87/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 290 days/year | 100/100 · A |
| Snowfall burden | 0.1 inches/year | 89/100 · A |
| Annual temperature balance | 73.9°F · 6.4° from 67.5°F | 80/100 · B |
| Normal heat + freeze calendar | 151 calendar days | 46/100 · D |
| Precipitation balance | 19.8 in · 15.2 from 35 in | 46/100 · D |
| Summer moisture balance | 66.1°F mean dew point | 30/100 · F |
Del Rio · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Del Rio'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
- 89.9°F
- Coldest month
- 55.6°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 Del Rio sits across the climate record
Three NOAA fields for Del Rio's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 2% warmest
- Among 6,861 stations, Del Rio sits in the warmer third of annual means.
- Annual precipitation
- Drier than 73%
- Del Rio's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 84%
- Warmest-to-coldest month gap for Del Rio is compact versus 6,861 complete station-years.
How Del Rio compares across U.S. station-mapped locations
Del Rio's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
87 Top 13% score exceeds 87% 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%). This entry sits in this band.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Del Rio's measured station temperature trend
MethodologyAcross 66 complete annual observations from 1949 to 2025, DEL RIO INTL AP warmed at a fitted rate of 0.14°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Del Rio primary station fitted change +0.14 °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 | 68°F (20°C) | 44°F (6°C) | 56°F (13°C) | 0.6" | 0.0" | 4.3 | 0.0 |
| February | 73°F (23°C) | 48°F (9°C) | 61°F (16°C) | 0.6" | 0.1" | 1.8 | 0.5 |
| March | 80°F (27°C) | 56°F (13°C) | 68°F (20°C) | 1.2" | 0.0" | 0.7 | 2.7 |
| April | 87°F (31°C) | 63°F (17°C) | 75°F (24°C) | 1.5" | 0.0" | 0.0 | 8.2 |
| May | 93°F (34°C) | 71°F (22°C) | 82°F (28°C) | 3.1" | 0.0" | 0.0 | 17.7 |
| June | 98°F (37°C) | 77°F (25°C) | 88°F (31°C) | 2.3" | 0.0" | 0.0 | 26.5 |
| July | 100°F (38°C) | 79°F (26°C) | 90°F (32°C) | 1.5" | 0.0" | 0.0 | 28.6 |
| August | 101°F (38°C) | 79°F (26°C) | 90°F (32°C) | 2.7" | 0.0" | 0.0 | 29.0 |
| September | 94°F (34°C) | 73°F (23°C) | 84°F (29°C) | 2.6" | 0.0" | 0.0 | 20.6 |
| October | 86°F (30°C) | 64°F (18°C) | 75°F (24°C) | 2.1" | 0.0" | 0.1 | 6.5 |
| November | 75°F (24°C) | 53°F (11°C) | 64°F (18°C) | 0.9" | 0.0" | 0.7 | 0.2 |
| December | 68°F (20°C) | 44°F (7°C) | 56°F (13°C) | 0.7" | 0.0" | 4.3 | 0.0 |
The year, day by day
The year in Del Rio runs from a mild 43°F around January 1 to 102°F at the peak near August 6, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from May 3 through September 30, covering 151 dates. The broader mild season, normal highs of 70°F or more, runs February 2 to December 1.
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 43°F around January 1.
Where the wet dates fall
The likeliest wet date is May 21, when 22% of years recorded at least a hundredth of an inch. The driest is July 26 at 11%. Summed across the calendar, that is about 59 wet dates a year.
The widest day
April 4 carries the biggest normal gap between afternoon and dawn, 25°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Del Rio.
Where Del Rio Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 151 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
Del Rio earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
3.9 days with precipitation
Snow: 0.1"
4.5 days with precipitation
5.0 days with precipitation
5.0 days with precipitation
7.0 days with precipitation
5.2 days with precipitation
3.7 days with precipitation
4.2 days with precipitation
5.9 days with precipitation
5.5 days with precipitation
4.4 days with precipitation
4.4 days with precipitation
Del Rio spreads its precipitation across the year
Neither half of the year dominates here: June through August take 33% of the annual total and December through February 10%, with neither reaching the 35% that would mark a distinct wet season. Del Rio has no dry season to plan around, though it does carry a 34.3°F seasonal spread.
The gap between the wettest and driest month still matters: May averages 3.1" and January 0.6". The three wettest months together take 42% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
How Del Rio's precipitation splits across the calendar
About 59 days a year record measurable precipitation here, carrying 19.8" between them, or roughly 0.34 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 Del Rio, but rarely amounts to much
The normals record 0.1 inches of snow a year here, most likely in February. 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 0 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
December 3
50% probability date
Last Spring Freeze
February 16
50% probability date
Growing Season
290 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
970
Higher = more heating needed
Cooling Degree Days
4,233
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 55% | 7.4 | 72% | 20% |
| February | 49% | 8.6 | 74% | 17% |
| March | 53% | 9.4 | 71% | 16% |
| April | 52% | 9.9 | 72% | 14% |
| May | 58% | 10.1 | 76% | 7% |
| June | 56% | 9.9 | 71% | 7% |
| July | 51% | 9.2 | 81% | 3% |
| August | 56% | 7.9 | 72% | 6% |
| September | 59% | 7.8 | 74% | 9% |
| October | 60% | 7.8 | 71% | 16% |
| November | 59% | 7.0 | 71% | 20% |
| December | 57% | 7.1 | 61% | 30% |
Nationwide similar cities
Other rankable U.S. places outside TX closest to Del Rio 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 (74°F here).
- Ehrenberg, AZ 74°F · 0.0°F off
- Kilauea, HI 74°F · 0.0°F off
- Lakeland, FL 74°F · 0.0°F off
- St Petersburg, FL 74°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (19.8" here), excluding temperature-peer places.
- Imperial, NE 19.8" · 0.0" off
- Gilroy, CA 19.8" · 0.0" off
- Payson, AZ 19.8" · 0.1" off
- Streeter, ND 19.8" · 0.1" off
Data-derived climate profile
How Del Rio's climate pattern fits together
cooling led · dry · mid swing
Air-conditioning demand is the clearest thermal signal here. Del Rio accumulates 4,233 cooling degree days, more than twice its 970 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: Del Rio receives 19.8 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.
August and January mark the typical warm and cold ends of the calendar in Del Rio's middle-range seasonal profile. The measured spread is 34.3°F. The annual average is 74°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Del Rio has a long frost-free window of roughly 290 days, but the dry annual profile is a separate constraint. Growing-season length says when freezes are unlikely, not whether rainfall is sufficient.
These labels group NOAA 1991-2020 normals from Del Rio's primary station, so the summer figures are a thirty-year average rather than a ceiling: individual years have run hotter and will again. For Del Rio that means a descriptive range only — not an official NOAA classification and not a prediction for next summer.
Questions about Del Rio's climate
How much rain does Del Rio get? ▼
How many days above 90°F does Del Rio get? ▼
How much energy does heating and cooling require in Del Rio? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Del Rio's primary station: DEL RIO INTL AP (USW00022010). 2 NOAA stations are mapped to the Del Rio 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 4819792). Match rule for Del Rio: 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 Del Rio 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.