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McAllen, TX Weather on May 15
May 15th in McAllen, TX typically brings hot spring weather, with average highs around 90°F and lows near 71°F. Over 55 years of records, the warmest May 15th was in 2003 (93°F average), while the coldest was 2014 (68°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 22% of May 15th dates historically, with the wettest May 15th recording 3.4" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
What to Expect on May 15
Planning for May 15th in McAllen, TX? Stay hydrated and seek shade during peak afternoon hours.
May 15 Weather Records for McAllen
- •The all-time record high for May 15th in McAllen, TX is 98°F, set in 2024.
- •The coldest May 15th on record dropped to 55°F in 1976.
- •Temperatures have reached 90°F or higher on May 15th in 35 of the last 55 years.
Frequently Asked Questions
What was the warmest May 15 ever in McAllen?
The warmest May 15 in McAllen, TX reached 98°F in 2024. That is 8°F above the long-term average high of 90°F.
What was the coldest May 15 ever in McAllen?
The coldest May 15 in McAllen, TX dropped to 55°F in 1976. That is 16°F below the long-term average low of 71°F.
What is the average temperature on May 15 in McAllen?
On May 15, McAllen averages a high of 90°F and a low of 71°F based on 55 years of NOAA weather observations from MCALLEN.
How many years of weather data are available for May 15 in McAllen?
We have 55 years of weather records for May 15 in McAllen, TX, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
May 15 Weather History in McAllen
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 97°F | 76°F | 0" | -- |
| 2024 | 98°F | 74°F | 0" | -- |
| 2023 | 89°F | 70°F | 0" | -- |
| 2022 | 94°F | 72°F | 0" | -- |
| 2021 | 85°F | 67°F | 0" | -- |
| 2020 | 97°F | 78°F | 0" | -- |
| 2019 | 91°F | 75°F | 0" | -- |
| 2018 | 97°F | 74°F | 0" | -- |
| 2017 | 96°F | 72°F | 0" | -- |
| 2016 | 91°F | 72°F | 1.09" | -- |
| 2015 | 91°F | 76°F | 0" | -- |
| 2014 | 79°F | 58°F | 0" | -- |
| 2013 | 84°F | 69°F | 0" | -- |
| 2012 | 88°F | 67°F | 0.66" | -- |
| 2011 | 90°F | 69°F | 0" | -- |
| 2010 | 91°F | 77°F | 0" | -- |
| 2009 | 93°F | 77°F | 0" | -- |
| 2008 | 97°F | 74°F | 0.25" | -- |
| 2007 | 92°F | 71°F | 0" | -- |
| 2006 | 97°F | 65°F | 2.24" | -- |
| 2005 | 91°F | 73°F | 0" | -- |
| 2004 | 83°F | 68°F | 0" | -- |
| 2003 | 94°F | 92°F | 0" | -- |
| 2002 | 85°F | 69°F | 0" | -- |
| 2001 | 92°F | 69°F | 0" | -- |
| 2000 | 86°F | 71°F | 0.03" | -- |
| 1999 | 94°F | 76°F | 0" | -- |
| 1998 | 93°F | 75°F | 0" | -- |
| 1997 | 89°F | 70°F | 0" | -- |
| 1996 | 89°F | 72°F | 0" | -- |
| 1995 | 95°F | 79°F | 0" | -- |
| 1994 | 89°F | 67°F | 3.25" | -- |
| 1993 | 90°F | 65°F | 0" | -- |
| 1992 | 90°F | 65°F | 2.24" | -- |
| 1991 | 86°F | 67°F | 0.13" | -- |
| 1990 | 95°F | 72°F | 0" | -- |
| 1989 | 92°F | 77°F | 0" | -- |
| 1988 | 86°F | 67°F | 0" | -- |
| 1987 | 91°F | 73°F | 0" | -- |
| 1986 | 84°F | 75°F | 0" | -- |
| 1985 | 93°F | 77°F | 3.4" | -- |
| 1984 | 80°F | 69°F | 0.51" | -- |
| 1983 | 94°F | 77°F | 0" | -- |
| 1982 | 90°F | 73°F | 0" | -- |
| 1981 | 92°F | 75°F | 0" | -- |
| 1980 | 91°F | 77°F | 0.41" | -- |
| 1979 | 85°F | 58°F | 0" | -- |
| 1978 | 92°F | 69°F | 0" | -- |
| 1977 | 88°F | 73°F | 0" | -- |
| 1976 | 95°F | 55°F | 0" | -- |
| 1975 | 96°F | 62°F | 0.43" | -- |
| 1974 | 94°F | 77°F | 0" | -- |
| 1973 | 84°F | 62°F | 0" | -- |
| 1972 | 85°F | 69°F | 0" | -- |
| 1971 | 86°F | 60°F | 0" | -- |
Based on 55 years of data from NOAA station: MCALLEN
Monthly Climate Averages
Historical temperature and precipitation averages for McAllen, TX, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.