McAllen, Texas Weather
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Climate of McAllen: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), June is usually the hottest month in McAllen, with average daytime highs around 36°C. January is the coolest, when nights typically fall to about 10°C.
The area receives about 600 mm of rain in a typical year. Most of it falls from September, and September is the wettest month at roughly 134 mm.
For outdoor plans and travel, October to March usually offer the most comfortable weather in McAllen, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 22° | 10° | 24 mm | 71% |
| Feb | 25° | 12° | 20 mm | 69% |
| Mar | 29° | 15° | 27 mm | 67% |
| Apr | 32° | 19° | 34 mm | 65% |
| May | 34° | 22° | 53 mm | 65% |
| Jun | 36° | 24° | 71 mm | 65% |
| Jul | 35° | 24° | 75 mm | 68% |
| Aug | 36° | 25° | 42 mm | 66% |
| Sep | 33° | 23° | 134 mm | 72% |
| Oct | 31° | 20° | 57 mm | 70% |
| Nov | 26° | 15° | 38 mm | 71% |
| Dec | 23° | 11° | 29 mm | 71% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around McAllen. Values describe typical conditions, not a forecast.
About McAllen weather
McAllen sits within Texas's vast Gulf Coast-to-arid-west range — humid subtropical in the east, semi-arid to desert further west, about 359 km south of San Antonio. Conditions turn hot with long, hot summers (June–September) with highs regularly above 35°C, more humid near the Gulf coast. By December, expect mild winters across most of the state, with occasional cold snaps and rare snow. This page shows live, auto-refreshing weather for McAllen: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
McAllen is about 359 km south of San Antonio, in Texas.
McAllen sees mild winters across most of the state, with occasional cold snaps and rare snow.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for McAllen's exact coordinates. No fixed schedule, the page updates whenever you load it.
June is usually the hottest month in McAllen, with average daytime highs of about 36°C and nights around 24°C.
The coldest nights come in January, when the average low is about 10°C and daytime highs reach around 22°C.
McAllen receives about 600 mm of rain in a typical year. September is the wettest month at roughly 134 mm, the only month that averages more than 100 mm.
October to March usually offer the most comfortable weather in McAllen, with mild daytime temperatures and little rain.
In November McAllen typically sees daytime highs near 26°C and lows near 15°C, with about 38 mm of rain over the month and average humidity around 71%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for McAllen is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
McAllen's day-to-day weather follows the broader pattern of Texas described above. See the hourly weather forecast or the air quality index for more detail.