Mcallen Miller, 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 Mcallen Miller's primary NOAA station, MCALLEN MILLER INTL AP.
The climate verdict for Mcallen Miller
Warm-season cooling demand defines Mcallen Miller, Texas, running at more than twice its heating total. The NOAA normal records an annual average of 77°F. August is the warmest month at 89°F and January the coldest at 63°F.
- 77°F
- yearly average temperature, NOAA normal
- 22.2"
- yearly precipitation total
Mcallen Miller: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00012959 · Mcallen Miller, TX 77°F mean · 22.2" precip
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-DRY · SWING-NARROW · COMF-UNK · LOAD-COOL · STN-1 · BOOK-FULL
- TEMP-HOT 77°F
- RANK-WARM #6,792
- PHOTO-FINISH ≈ Ocotillo Wells
- PRCP-DRY 22.2"
- SWING-NARROW 27°F
- COMF-UNK Comfort n/a
- LOAD-COOL 4,989 CDD
- STN-1 USW00012959
- BOOK-FULL 5/6 fields
Nearest mean-temperature peer: Ocotillo Wells, CA ( -0.8 °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.
- Hot Cape Florida, FL 79°F
- Mcallen Miller (this station) 77°F
- Near Ocotillo Wells, CA 77°F
- Near Falcon Dam, TX 77°F
- Cold Brownsville, TX 76°F
Mcallen Miller 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 · Mcallen Miller
Mcallen Miller: 43/100 · grade D
Mcallen Miller publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals); 2 missing weights rescale to 100.
PlainClimate-derived for Mcallen Miller, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 77.4°F · 9.9° from 67.5°F | 68/100 · C |
| Precipitation balance | 22.2 in · 12.8 from 35 in | 55/100 · C |
| Normal heat + freeze calendar | 168 calendar days | 34/100 · F |
| Summer moisture balance | 72.6°F mean dew point | 5/100 · F |
Mcallen Miller · 2026-08-04 · NOAA NCEI Climate Normals · method .
Mcallen Miller'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
- 89.3°F
- Coldest month
- 62.8°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 Mcallen Miller sits across the climate record
Three NOAA fields for Mcallen Miller's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 1% warmest
- Among 6,861 stations, Mcallen Miller sits in the warmer third of annual means.
- Annual precipitation
- 31st percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 94%
- Warmest-to-coldest month gap for Mcallen Miller is compact versus 6,861 complete station-years.
Mcallen Miller's measured station temperature trend
MethodologyAcross 53 complete annual observations from 1962 to 2025, MCALLEN MILLER INTL AP warmed at a fitted rate of 0.42°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Mcallen Miller primary station fitted change +0.42 °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 | 73°F (23°C) | 53°F (12°C) | 63°F (17°C) | 0.8" | 0.3 | 0.4 |
| February | 77°F (25°C) | 57°F (14°C) | 67°F (20°C) | 0.7" | 0.3 | 2.2 |
| March | 83°F (28°C) | 63°F (17°C) | 73°F (23°C) | 1.4" | 0.0 | 5.7 |
| April | 88°F (31°C) | 68°F (20°C) | 78°F (26°C) | 1.4" | 0.0 | 12.8 |
| May | 93°F (34°C) | 74°F (23°C) | 84°F (29°C) | 2.0" | 0.0 | 23.6 |
| June | 97°F (36°C) | 78°F (26°C) | 88°F (31°C) | 3.0" | 0.0 | 28.4 |
| July | 99°F (37°C) | 79°F (26°C) | 89°F (31°C) | 2.0" | 0.0 | 29.8 |
| August | 100°F (38°C) | 79°F (26°C) | 89°F (32°C) | 1.8" | 0.0 | 30.0 |
| September | 94°F (35°C) | 76°F (24°C) | 85°F (29°C) | 4.6" | 0.0 | 24.2 |
| October | 89°F (32°C) | 69°F (20°C) | 79°F (26°C) | 2.1" | 0.0 | 16.4 |
| November | 80°F (27°C) | 60°F (16°C) | 70°F (21°C) | 1.2" | 0.0 | 3.0 |
| December | 74°F (23°C) | 54°F (12°C) | 64°F (18°C) | 1.1" | 0.2 | 0.5 |
The year, day by day
The year in Mcallen Miller runs from a mild 52°F around January 6 to 101°F at the peak near August 7, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from April 30 through October 14, covering 168 dates. The broader mild season, normal highs of 70°F or more, runs January 1 to December 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.
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 52°F around January 6.
Where the wet dates fall
The likeliest wet date is September 11, when 26% of years recorded at least a hundredth of an inch. The driest is July 31 at 12%. Summed across the calendar, that is about 63 wet dates a year.
The widest day
August 4 carries the biggest normal gap between afternoon and dawn, 21°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Mcallen Miller.
Where Mcallen Miller Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 168 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 21°F.
Mcallen Miller earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
6.1 days with precipitation
4.5 days with precipitation
4.4 days with precipitation
3.8 days with precipitation
4.3 days with precipitation
4.8 days with precipitation
4.7 days with precipitation
4.7 days with precipitation
8.0 days with precipitation
5.8 days with precipitation
5.2 days with precipitation
6.1 days with precipitation
Mcallen Miller spreads its precipitation across the year
Neither half of the year dominates here: June through August take 31% of the annual total and December through February 12%, with neither reaching the 35% that would mark a distinct wet season. Mcallen Miller has no dry season to plan around, though it does carry an unusually narrow 26.5°F seasonal spread.
The gap between the wettest and driest month still matters: September averages 4.6" and February 0.7". The three wettest months together take 44% 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.
When it rains in Mcallen Miller, it arrives in quantity
22.2" of precipitation falls across only about 62 wet days here, averaging 0.36 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 62 a year, 17% of all days
- Average depth per wet day
- 0.36 inches
- Most wet days
- September, about 8
- Fewest wet days
- April, about 4
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.
Frost Dates & Growing Season
First Fall Freeze
January 3
50% probability date
Last Spring Freeze
January 9
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
453
Higher = more heating needed
Cooling Degree Days
4,989
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 | 68% | 9.6 | 47% | 32% |
| February | 65% | 11.2 | 49% | 24% |
| March | 67% | 12.0 | 44% | 23% |
| April | 68% | 12.5 | 45% | 20% |
| May | 69% | 11.7 | 47% | 7% |
| June | 69% | 11.8 | 53% | 4% |
| July | 65% | 11.6 | 64% | 1% |
| August | 68% | 8.7 | 57% | 3% |
| September | 69% | 8.2 | 59% | 7% |
| October | 67% | 9.3 | 56% | 17% |
| November | 68% | 9.0 | 53% | 23% |
| December | 68% | 9.3 | 52% | 29% |
Nationwide similar cities
Other rankable U.S. places outside TX closest to Mcallen Miller 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 (77°F here).
- Miami, FL 77°F · 0.0°F off
- Duck Key, FL 78°F · 0.1°F off
- Kahului, HI 77°F · 0.3°F off
- Tavernier, FL 78°F · 0.4°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (22.2" here), excluding temperature-peer places.
- Buffalo, OK 22.1" · 0.0" off
- Los Gatos, CA 22.2" · 0.0" off
- Brady, NE 22.2" · 0.0" off
- Pembina, ND 22.1" · 0.1" off
Data-derived climate profile
How Mcallen Miller's climate pattern fits together
cooling led · moderate · low swing
Warm-season load persists through a relatively even calendar in Mcallen Miller. Cooling totals 4,989 degree days, more than double the 453 heating measure, and the 26.5°F seasonal range is compact rather than sharply divided.
Mcallen Miller's 22.2 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
Temperature varies within a narrow 26.5°F band across the normal year. August and January mark the typical warm and cold ends of the calendar. The annual average is 77°F. Monthly rows still matter, but they refine a steady profile rather than reveal two climatic extremes.
A frost-free growing-season length is not available for Mcallen Miller. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
These labels group NOAA 1991-2020 normals from Mcallen Miller'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 Mcallen Miller that means a descriptive range only — not an official NOAA classification and not a prediction for next summer.
Questions about Mcallen Miller's climate
How much rain does Mcallen Miller get? ▼
How many days above 90°F does Mcallen Miller get? ▼
How much energy does heating and cooling require in Mcallen Miller? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Mcallen Miller's primary station: MCALLEN MILLER INTL AP (USW00012959). 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 Mcallen Miller; 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 Mcallen Miller 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.