McAllen, TX Weather
McAllen hourly forecast: next 24 hours
Today's high of 104°F (40°C) is about 6°F (3°C) above the typical August high of 98°F (36°C).
Current conditions in detail
McAllen weather tomorrow (Thursday, August 27)
Tomorrow in McAllen looks sunny, with a high of 103° and an overnight low of 79°. Rain is unlikely (2% chance). Winds top out near 20 mph, and the UV index reaches 11 (extreme).
McAllen 14-day forecast
About the weather in McAllen
McAllen is a humid subtropical city - hot, humid summers and generally mild winters. August is the warmest month at 98°F (36°C) and January the coolest at 71°F (22°C), over 27.7 inches (703 mm) of precipitation a year.
McAllen weather: quick facts
- Hottest month: August - highs near 98°F (36°C)
- Coldest month: January - highs near 71°F (22°C)
- Decade extremes (2015-2024): 108°F (42°C) high · 23°F (-5°C) low
- Wettest month: September (12 rainy days) · Sunniest: August (12.2 h sun/day)
- Climate type: humid subtropical
- Annual swing: 14°C between the average warmest and coolest month · day to night: 10°C
- Months averaging 30°C or hotter: 7
- Average humidity: 69%
Temperatures through the year
Four of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is November through February. August is the warm end of the year, averaging 98°F (36°C) by day and 80°F (26°C) overnight. January bottoms out at 71°F (22°C) in daylight, 53°F (12°C) after dark. The gridded 2015-2024 daily record for this location tops out at 108°F (42°C) and bottoms at 23°F (-5°C) - decade extremes, not all-time station records. The wettest month is September (3.6 inches (92 mm) across 12 days) and the driest February.
Rain, sun and snow
Average highs hold at or above 30°C for 7 months of the year, April through October being the unbroken run.
Season by season
Spring (March through May)
Spring is hot here - highs near 87°F (30°C), nights near 69°F (21°C), and expect showers on roughly 24 days across the season. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows why.
Summer (June through August)
Summer in McAllen is punishingly hot, with daytime highs averaging 96°F (36°C) and nights around 79°F (26°C); expect showers on roughly 24 days across the season. Daylight is generous - around 12.1 hours of sun a day.
Fall (September through November)
Fall runs hot here - highs near 86°F (30°C), nights near 70°F (21°C), and expect showers on roughly 28 days across the season.
Winter (December through February)
Through winter, McAllen brings comfortable warmth: 74°F (23°C) by day, 56°F (13°C) after dark, and rain comes on about 17 days over the three months.
Average temperatures in McAllen by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 71° | 53° | 6 | 1.3 in | 7.4 h/day | 68% |
| February | 76° | 57° | 5 | 1.0 in | 8.2 h/day | 69% |
| March | 82° | 64° | 6 | 1.9 in | 8.5 h/day | 69% |
| April | 87° | 69° | 8 | 2.4 in | 9.7 h/day | 69% |
| May | 91° | 74° | 10 | 3.3 in | 11.2 h/day | 72% |
| June | 94° | 77° | 10 | 3.4 in | 12.0 h/day | 70% |
| July | 96° | 79° | 7 | 3.3 in | 12.1 h/day | 67% |
| August | 98° | 80° | 8 | 1.7 in | 12.2 h/day | 65% |
| September | 92° | 76° | 12 | 3.6 in | 10.4 h/day | 71% |
| October | 88° | 70° | 8 | 2.5 in | 9.7 h/day | 68% |
| November | 79° | 62° | 8 | 2.2 in | 7.9 h/day | 71% |
| December | 75° | 57° | 5 | 1.1 in | 7.5 h/day | 71% |