- McAllen ›
- Weather by month
McAllen Weather by Month
Average temperatures, rainfall and humidity for McAllen, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical McAllen month looks like before you travel — then check the live McAllen forecast for the days ahead.
Warmest month
August
37°C average high
Coolest month
January
11°C average low
Wettest month
September
80 mm of rain
Driest month
February
19 mm of rain
Average temperature and rainfall in McAllen by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 22°C | 11°C | -3°C / 34°C | 29 mm | 69% | 15 km/h |
| February | 25°C | 14°C | -5°C / 37°C | 19 mm | 69% | 17 km/h |
| March | 28°C | 17°C | 2°C / 39°C | 36 mm | 68% | 18 km/h |
| April | 31°C | 20°C | 9°C / 41°C | 30 mm | 70% | 19 km/h |
| May | 33°C | 23°C | 10°C / 44°C | 56 mm | 71% | 19 km/h |
| June | 35°C | 25°C | 20°C / 42°C | 42 mm | 69% | 17 km/h |
| July | 36°C | 26°C | 21°C / 42°C | 26 mm | 67% | 18 km/h |
| August | 37°C | 26°C | 20°C / 41°C | 21 mm | 65% | 17 km/h |
| September | 34°C | 24°C | 14°C / 40°C | 80 mm | 72% | 14 km/h |
| October | 31°C | 21°C | 5°C / 39°C | 41 mm | 69% | 14 km/h |
| November | 27°C | 16°C | 0°C / 35°C | 42 mm | 72% | 14 km/h |
| December | 24°C | 14°C | -1°C / 34°C | 34 mm | 72% | 14 km/h |
Best time to visit McAllen
The most comfortable time to visit McAllen is generally December to February, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around September, totalling about 456 mm a year.
Travellers who prefer heat should aim for August, when highs average 37°C. September is the month to avoid if rain would spoil your plans — it averages 80 mm, roughly 4× the rainfall of the driest month (February).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the McAllen forecast for what is happening now.
Weather across United States right now
- Atlanta15°C
- Austin19°C
- Baltimore12°C
- Boston9°C
- Brooklyn12°C
- Chicago13°C
- Dallas19°C
- Denver17°C
- Detroit11°C
- Houston21°C
- Indianapolis9°C
- Las Vegas15°C
- Los Angeles15°C
- Miami23°C
- Minneapolis15°C
- New York12°C
- Orlando16°C
- Philadelphia12°C
- Phoenix21°C
- Pittsburgh7°C
- Portland9°C
- Queens12°C
- Riverside15°C
- Sacramento15°C
- San Antonio19°C
- San Diego16°C
- San Francisco13°C
- San Jose15°C
- Seattle7°C
- St. Louis13°C
- Tampa16°C
- Washington10°C
