October is one of the warmer months of the year in Mcallen, with average highs near 31.2°C and lows around 19.9°C (mean 25.5°C). It is about average for rainfall, averaging 61 mm of rainfall and 70% relative humidity across the period.
October is one of the warmer months of the year in Mcallen. Across 45 years of records, the warmest October in Mcallen was 2004 — when the month averaged 27.9°C — while the coldest were 1997 and 2008 at 23.7°C. Typical October days reach 31.2°C with nights near 19.9°C. The long-term trend is warming, about 0.3°C per decade.
October is about average for rainfall in Mcallen, averaging 61 mm of rainfall. The wettest October on record was 2015 with 211 mm, while the driest was 2001 at 4 mm.
Relative humidity in Mcallen during October averages 70%. The most humid October was 2003 at 82%, and the least humid was 2011 at 58%.
October receives about 4.7 kWh/m²/day of solar energy in Mcallen. The sunniest October was 2010 at 5.5 kWh/m²/day, and the cloudiest was 1984 at 3.6.
Average wind speed in Mcallen during October is 2.9 m/s. The windiest October was 2009 at 3.9 m/s, while the calmest was 2024 at 2.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.4°C | 24.9°C | 25.5°C | 26.0°C | 26.5°C | +1.1°C |
| Avg High | 30.9°C | 30.6°C | 30.7°C | 32.0°C | 32.4°C | +1.5°C |
| Avg Low | 19.9°C | 19.3°C | 20.2°C | 20.0°C | 20.5°C | +0.6°C |
| Avg Rain | 51 mm | 74 mm | 71 mm | 51 mm | 50 mm | 0 mm |
October temperatures in Mcallen have risen by about 1°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 1.3°C (1993) to a record high of 41.1°C (2012).
Rainfall in October is about average for rainfall, averaging 61 mm, with a wettest year of 211 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
A good time to visit Mcallen
October is a good time to visit Mcallen, with days averaging 31.2°C and nights around 19.9°C (mean 25.5°C, close to Mcallen's yearly average) and moderate rainfall. March and November are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 34.1°C | 27.8°C | 21.5°C | 37.1°C | 9.3°C | 22 mm | 65% | 2.5 m/s | 5.1 |
| 2024 | 31.8°C | 26.3°C | 20.8°C | 33.8°C | 16.4°C | 66 mm | 75% | 2.2 m/s | 4.9 |
| 2023 | 32.5°C | 26.9°C | 21.3°C | 38.6°C | 10.2°C | 53 mm | 66% | 3.2 m/s | 4.2 |
| 2022 | 32.0°C | 25.9°C | 19.7°C | 36.8°C | 12.2°C | 34 mm | 63% | 2.7 m/s | 4.6 |
| 2021 | 31.2°C | 25.9°C | 20.5°C | 34.5°C | 13.2°C | 117 mm | 74% | 2.7 m/s | 5 |
| 2020 | 32.7°C | 26.0°C | 19.4°C | 37.3°C | 10.3°C | 9 mm | 67% | 2.8 m/s | 5.1 |
| 2019 | 32.2°C | 25.9°C | 19.6°C | 36.7°C | 8.5°C | 73 mm | 68% | 3.2 m/s | 4.8 |
| 2018 | 29.5°C | 24.6°C | 19.6°C | 35.7°C | 11.1°C | 59 mm | 78% | 3.2 m/s | 4 |
| 2017 | 31.2°C | 25.1°C | 19.0°C | 36.7°C | 6.9°C | 86 mm | 67% | 2.6 m/s | 4.9 |
| 2016 | 33.8°C | 27.7°C | 21.5°C | 37.0°C | 15.1°C | 16 mm | 66% | 2.5 m/s | 5.1 |
| 2015 🌧️ | 31.8°C | 26.5°C | 21.3°C | 35.7°C | 12.6°C | 211 mm | 73% | 2.8 m/s | 4.5 |
| 2014 | 31.9°C | 26.0°C | 20.1°C | 34.5°C | 13.8°C | 30 mm | 72% | 2.9 m/s | 5.1 |
| 2013 | 31.5°C | 26.0°C | 20.5°C | 34.4°C | 13.6°C | 6 mm | 70% | 3.1 m/s | 4.7 |
| 2012 | 33.8°C | 27.3°C | 20.7°C | 41.1°C | 12.9°C | 13 mm | 62% | 3.5 m/s | 4.8 |
| 2011 | 32.9°C | 26.3°C | 19.6°C | 37.5°C | 10.9°C | 13 mm | 58% | 3.1 m/s | 5.3 |
| 2010 | 31.5°C | 24.7°C | 17.9°C | 35.2°C | 12.3°C | 5 mm | 65% | 2.9 m/s | 5.5 |
| 2009 | 32.0°C | 26.3°C | 20.7°C | 37.8°C | 10.1°C | 28 mm | 67% | 3.9 m/s | 4.2 |
| 2008 | 28.9°C | 23.7°C | 18.4°C | 32.7°C | 11.3°C | 28 mm | 75% | 2.4 m/s | 5 |
| 2007 | 31.2°C | 25.2°C | 19.2°C | 36.0°C | 9.9°C | 29 mm | 69% | 2.7 m/s | 5.3 |
| 2006 | 29.4°C | 25.1°C | 20.8°C | 33.9°C | 10.6°C | 86 mm | 80% | 2.7 m/s | 3.9 |
| 2005 | 32.0°C | 26.4°C | 20.7°C | 37.1°C | 10.4°C | 37 mm | 66% | 2.9 m/s | 4.5 |
| 2004 🔥 | 33.2°C | 27.9°C | 22.6°C | 37.7°C | 13.9°C | 45 mm | 71% | 3.5 m/s | 4.8 |
| 2003 | 28.7°C | 24.2°C | 19.6°C | 31.8°C | 9.4°C | 181 mm | 82% | 2.6 m/s | 4.3 |
| 2002 | 30.8°C | 26.1°C | 21.4°C | 35.7°C | 13.4°C | 192 mm | 79% | 2.9 m/s | 4 |
| 2001 | 31.3°C | 25.1°C | 19.0°C | 36.9°C | 10.8°C | 4 mm | 68% | 3.2 m/s | 5 |
| 2000 | 29.7°C | 24.6°C | 19.4°C | 36.8°C | 6.4°C | 83 mm | 74% | 3.5 m/s | 3.9 |
| 1999 | 30.7°C | 24.3°C | 17.8°C | 36.1°C | 9.9°C | 52 mm | 67% | 2.7 m/s | 5 |
| 1998 | 29.8°C | 25.1°C | 20.3°C | 35.4°C | 13.5°C | 135 mm | 79% | 3.2 m/s | 4.3 |
| 1997 ❄️ | 28.6°C | 23.7°C | 18.8°C | 35.1°C | 8.9°C | 162 mm | 76% | 2.9 m/s | 4.4 |
| 1996 | 30.8°C | 25.4°C | 20.0°C | 34.9°C | 11.2°C | 86 mm | 74% | 3 m/s | 4.5 |
| 1995 | 30.4°C | 24.8°C | 19.2°C | 34.7°C | 12.0°C | 85 mm | 70% | 2.8 m/s | 4.7 |
| 1994 | 31.9°C | 26.2°C | 20.5°C | 37.1°C | 11.6°C | 55 mm | 68% | 3.2 m/s | 4.3 |
| 1993 | 29.7°C | 23.9°C | 18.1°C | 35.3°C | 1.3°C | 18 mm | 67% | 3.1 m/s | 4.8 |
| 1992 | 31.4°C | 25.6°C | 19.7°C | 36.1°C | 15.2°C | 51 mm | 68% | 2.7 m/s | 4.3 |
| 1991 | 31.3°C | 25.8°C | 20.2°C | 34.6°C | 14.0°C | 71 mm | 72% | 2.8 m/s | 4.6 |
| 1990 | 31.1°C | 24.6°C | 18.2°C | 37.0°C | 8.5°C | 25 mm | 62% | 2.8 m/s | 4.9 |
| 1989 | 31.8°C | 25.2°C | 18.7°C | 37.4°C | 7.7°C | 20 mm | 62% | 3 m/s | 5.2 |
| 1988 | 30.7°C | 25.1°C | 19.5°C | 33.1°C | 16.8°C | 54 mm | 71% | 2.6 m/s | 4.6 |
| 1987 | 30.6°C | 24.7°C | 18.7°C | 33.6°C | 15.6°C | 29 mm | 68% | 2.6 m/s | 5.1 |
| 1986 | 30.8°C | 25.3°C | 19.9°C | 36.1°C | 13.6°C | 48 mm | 68% | 3 m/s | 4.1 |
| 1985 | 30.7°C | 25.5°C | 20.2°C | 34.6°C | 12.2°C | 88 mm | 71% | 3.3 m/s | 4.7 |
| 1984 | 31.8°C | 26.9°C | 22.0°C | 37.1°C | 14.8°C | 28 mm | 75% | 3.5 m/s | 3.6 |
| 1983 | 30.0°C | 24.7°C | 19.4°C | 34.1°C | 11.4°C | 59 mm | 74% | 2.6 m/s | — |
| 1982 | 30.9°C | 25.4°C | 19.9°C | 35.6°C | 11.7°C | 65 mm | 68% | 3 m/s | — |
| 1981 | 30.6°C | 25.5°C | 20.4°C | 35.0°C | 10.0°C | 64 mm | 72% | 3.4 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 31.2°C with lows near 19.9°C (mean 25.5°C), based on 45 years of NASA POWER data.
October averages 61 mm of rainfall in Mcallen, about average for rainfall. The wettest on record was 211 mm in 2015.
The hottest October reached 41.1°C in 2012. The coldest dipped to 1.3°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1°C. Daytime highs moved from 30.8°C to 32.3°C and overnight lows from 20.4°C to 20.8°C over the same span.
October is one of the warmer months of the year in Mcallen and about average for rainfall, so plan for around 31.2°C daytime highs and 19.9°C at night.
Not quite — October is the 6th coolest month in Mcallen, averaging 25.5°C.
For October in Mcallen, pack light, breathable clothing and sun protection, with typical highs of 31.2°C and lows of 19.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 70% — moderately humid.
Average wind speed in October is 2.9 m/s. The windiest October on record averaged 3.9 m/s (2009).
The wettest October on record was 2015 with 211 mm. On average, October sees 61 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Mcallen behaves each October, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for October specifically, along with year-by-year records and how the month has changed over the decades.
