McAllen (TX) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit McAllen.
Climate overview of McAllen
The climate in McAllen, Texas, United States of America, is marked by large temperature swings across the seasons, ranging from 37°C (99°F) in August to 21°C (70°F) in January.
McAllen sees a moderate amount of rainfall, totalling around 648 mm (26 in) per year. It experiences two distinct dry seasons, January to April and October to November, with very hot summers and pleasant winters, creating some seasonal variation.
McAllen Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in McAllen - and find the best time to visit.
Monthly Temperature in McAllen
In McAllen, temperatures differ significantly between summer and winter months. Average maximum daytime temperatures range from a very hot 37°C (99°F) in August, the warmest time of the year, to a pleasant 21°C (70°F) during cooler months like January.
At night, you can expect temperatures ranging from 25°C (77°F) in August to around 9°C (48°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in McAllen
On average, McAllen receives a reasonable amount of rainfall, with an annual precipitation of 648 mm (26 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, September it receives high rainfall, averaging 129 mm (5.1 in) of precipitation, recorded across 11 rainy days. In contrast, the driest month February brings less rainfall, with 20 mm (0.8 in) over 5 rainy days. For more details, please visit our McAllen Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit McAllen
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, November and December
- Warmest weather: June, July and August
- Wettest months: May, June, July, August and September, when rainfall is highest.
- Seasonal pattern: Two distinct dry seasons, January to April and October to November, with very hot summers and pleasant winters
Frequently asked questions about the climate in McAllen
What is the best time to visit McAllen?
January, February, March, November and December typically offer the most optimal weather in McAllen. In contrast, June, July, August and September tend to have less optimal conditions. McAllen has two distinct dry seasons, January to April and October to November, with very hot summers and pleasant winters.
What temperatures can I expect in McAllen?
Daytime highs range from 21°C (70°F) in January to 37°C (99°F) in August. Nighttime lows range from 9°C (48°F) to 25°C (77°F). Temperatures vary considerably through the year.
How much rain does McAllen get?
Annual rainfall is around 648 mm (26 in). September is the wettest month with 129 mm (5.1 in), while February is the driest with 20 mm (0.8 in).
McAllen 3-Day Forecast
McAllen on the map
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