McAllen, TX Climate & Monthly Averages
The climate of McAllen
Located in Texas, United States, McAllen experiences a humid subtropical climate with hot, humid summers and generally mild winters. Afternoon temperatures peak near 98°F (36°C) in August and dip to about 71°F (22°C) in January, with around 27.7 inches (703 mm) of precipitation falling across the year.
Climate quick facts
- Hottest month: August - highs near 98°F (36°C)
- Coldest month: January - highs near 71°F (22°C)
- Record high: 108°F (42°C) · Record low: 23°F (-5°C) (2015–2024)
- Wettest month: September (12 rainy days) · Sunniest: August (12.2 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 98°F (36°C) and overnight lows stay near 80°F (26°C). The coolest month is January, with typical highs of 71°F (22°C) and lows around 53°F (12°C). Based on 2015–2024 weather data, temperatures have reached as high as 108°F (42°C) and dropped as low as 23°F (-5°C).
Rain, sun and snow
September is usually the wettest month. It brings about 3.6 inches (92 mm) of rain over 12 days, while February is the driest. August brings the most sunshine, averaging 12.2 hours of sun a day.
Monthly climate table
| 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% |
McAllen month by month
McAllen weather in January
January brings highs around 71°F (22°C), lows near 53°F (12°C), about 6 wet days - typically the coldest month of the year in McAllen.
McAllen weather in February
February brings highs around 76°F (24°C), lows near 57°F (14°C), about 5 wet days - typically the driest month of the year in McAllen.
McAllen weather in March
March brings highs around 82°F (28°C), lows near 64°F (18°C), about 6 wet days.
McAllen weather in April
April brings highs around 87°F (31°C), lows near 69°F (20°C), about 8 wet days.
McAllen weather in May
May brings highs around 91°F (33°C), lows near 74°F (24°C), about 10 wet days.
McAllen weather in June
June brings highs around 94°F (35°C), lows near 77°F (25°C), about 10 wet days.
McAllen weather in July
July brings highs around 96°F (36°C), lows near 79°F (26°C), about 7 wet days.
McAllen weather in August
August brings highs around 98°F (36°C), lows near 80°F (26°C), about 8 wet days - typically the hottest month and the sunniest month of the year in McAllen.
McAllen weather in September
September brings highs around 92°F (34°C), lows near 76°F (25°C), about 12 wet days - typically the wettest month of the year in McAllen.
McAllen weather in October
October brings highs around 88°F (31°C), lows near 70°F (21°C), about 8 wet days.
McAllen weather in November
November brings highs around 79°F (26°C), lows near 62°F (17°C), about 8 wet days.
McAllen weather in December
December brings highs around 75°F (24°C), lows near 57°F (14°C), about 5 wet days.
Seasons in McAllen
Spring (March through May)
Spring in McAllen runs hot, with daytime highs averaging 87°F (30°C) and nights around 69°F (21°C); expect showers on roughly 24 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
Summer (June through August)
Summer in McAllen is intensely 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.
Fall (September through November)
Fall in McAllen runs hot, with daytime highs averaging 86°F (30°C) and nights around 70°F (21°C); expect showers on roughly 28 days across the season.
Winter (December through February)
Winter in McAllen is pleasantly warm, with daytime highs averaging 74°F (23°C) and nights around 56°F (13°C); rain falls on about 17 days over the three months.
Climate questions, answered
What is the average temperature in McAllen?
Is McAllen hot in summer?
Is McAllen cold in winter?
How many rainy days does McAllen get in a year?
Best time to visit McAllen
The best time to visit McAllen is generally December to March, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 76°F (24°C).
Pack for McAllen with lightweight, breathable clothing and strong sun protection for the hot months; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - August nights average 80°F (26°C).
McAllen temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.