Tomorrow in McAllen looks
overcast, with a high of 72°
and an overnight low of 61°.
There is a 68% chance of rain - plan accordingly.
Winds top out near 14 mph,
and the UV index reaches 3 (moderate).
McAllen averages 9.7 hours of sunshine per day, with August the brightest month. Temperatures peak in August and reach their annual low point in January.
Sunshine, rain and seasonal change
Rain and sunshine
About 703 mm (27.7 inches) falls across 93 wet days, with 9.7 hours of sunshine on an average day.
Seasonal change
August highs reach 98°F (36°C), while January lows fall to 53°F (12°C).
Typical day and night
McAllen averages 86°F (30°C) by day and 68°F (20°C) at night across the year.
September, at 3.6 inches (92 mm) over about 12 days. February is the driest month, at 1.0 inches (26 mm).
Does it snow in McAllen?
Effectively no. The 2015-2024 record for McAllen shows no regular measurable snowfall.
How long does summer last in McAllen?
Average highs hold at 30°C or above for 7 months of the year. Outside that, January pulls back to 71°F (22°C).
What is the average temperature in McAllen?
76°F (24°C) across all twelve months - about 86°F (30°C) by day and 68°F (20°C) after dark.
When is McAllen at its coldest?
January, with highs of 71°F (22°C) and lows near 53°F (12°C). The coldest day in the 2015-2024 record fell to 23°F (-5°C).
How humid does McAllen get?
Relative humidity averages 69% across the year, which reads as fairly humid. Paired with August heat, muggy afternoons are routine.
What is the hottest month in McAllen?
August, averaging 98°F (36°C) by day and 80°F (26°C) overnight. The hottest single day in our 2015-2024 record for this location reached 108°F (42°C).
What is the best time to visit McAllen?
Aim for December to March if you get the choice: warm days, manageable rainfall and plenty of daylight line up, and highs average 76°F (24°C) against roughly 6 wet days a month. For the same question asked the other way round, see where else is warm in December.