Climate
McAllen weather by month
Average highs, lows, rain and snow for every month, from 30 years of weather records.
Average temperatures
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
Best time to visit: January, February, December, when highs are mild and rain is lightest.
Month by month
| Month | High | Low | Rain | Wet days |
|---|---|---|---|---|
| January | 73°F | 53°F | 0.80 in | 6 |
| February | 77°F | 57°F | 0.70 in | 5 |
| March | 83°F | 63°F | 1.4 in | 4 |
| April | 88°F | 68°F | 1.4 in | 4 |
| May | 93°F | 74°F | 2.0 in | 4 |
| June | 97°F | 78°F | 3.0 in | 5 |
| July | 99°F | 79°F | 2.0 in | 5 |
| August | 100°F | 79°F | 1.8 in | 5 |
| September | 94°F | 76°F | 4.6 in | 8 |
| October | 89°F | 69°F | 2.1 in | 6 |
| November | 80°F | 60°F | 1.2 in | 5 |
| December | 74°F | 54°F | 1.1 in | 6 |
NOAA U.S. Climate Normals 1991–2020, Mcallen Miller Intl Ap, Tx Us (2.9 mi away, 100 ft). Wet days: days with at least 0.01 in of precipitation.
Questions
What is the hottest month in McAllen?
August, with an average high of 100°F and low of 79°F.
What is the coldest month in McAllen?
January, with an average low of 53°F and high of 73°F.
When does it rain most in McAllen?
September is the wettest month, averaging 4.6 in of precipitation; the year totals about 22.1 inches.
What is the best time to visit McAllen?
For mild weather (highs between 65°F and 85°F) with the least rain, January, February, December.
Where do these numbers come from?
NOAA’s 1991–2020 U.S. Climate Normals for the Mcallen Miller Intl Ap weather station, 2.9 miles from downtown: 30-year averages, not a forecast.