- WinterDec–Feb52°73°
- December51°72°
- January50°71°
- February54°76°
- SpringMar–May66°86°
- March59°81°
- April66°87°
- May72°91°
- SummerJun–Aug77°97°
- June76°96°
- July77°97°
- August77°98°
- AutumnSep–Nov66°87°
- September74°94°
- October66°88°
- November58°79°
McAllen, TX Weather by Month and Climate Averages
McAllen, TX gets 18.7 in of precipitation a year over about 40 rainy days. August is the warmest month (average high 98°F) and January the coldest (average low 50°F).
McAllen climate at a glance
Semi-arid climate
McAllen, TX has hot summers and warm winters. Daytime highs range from about 71°F in January to 98°F in August. September is usually the wettest month. The most comfortable time to visit is typically January to February and November to December, when daytime highs sit near 75°F.
How much rain does McAllen get?
McAllen gets 18.7 in of precipitation in an average year, spread over about 40 days with measurable rain. That is fewer rainy days than 88% of the US.
September is the wettest month, with 3.8 in. December is the driest, with 0.6 in. September has the most rainy days, about 6.
The longest dry spell in the last five years lasted 45 days, to March 8, 2026.
See where McAllen ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Texas.
Does it snow in McAllen?
Rarely. The reporting station for McAllen averages under 0.5 in of snow a season.
The most recent measurable snow at the station fell on December 8, 2017.
See where McAllen ranks: snowiest cities in the US.
McAllen weather by month
McAllen weather in January
In January, McAllen averages a high of 71°F and a low of 50°F. It gets 0.7 in of precipitation over about 3 rainy days. The sun is out about 46% of daylight hours. The January record high is 93°F (2025) and the record low is 24°F (1979). January is one of the most comfortable months to visit.
McAllen weather in February
In February, McAllen averages a high of 76°F and a low of 54°F. It gets 0.6 in of precipitation over about 3 rainy days. The sun is out about 49% of daylight hours. The February record high is 100°F (2009) and the record low is 20°F (2021). February is one of the most comfortable months to visit.
McAllen weather in March
In March, McAllen averages a high of 81°F and a low of 59°F. It gets 1.0 in of precipitation over about 3 rainy days. The sun is out about 46% of daylight hours. The March record high is 104°F (1984) and the record low is 31°F (1980).
McAllen weather in April
In April, McAllen averages a high of 87°F and a low of 66°F. It gets 1.4 in of precipitation over about 3 rainy days. The sun is out about 41% of daylight hours. The April record high is 109°F (2014) and the record low is 39°F (1987).
McAllen weather in May
In May, McAllen averages a high of 91°F and a low of 72°F. It gets 1.4 in of precipitation over about 3 rainy days. The sun is out about 50% of daylight hours. The May record high is 110°F (2024) and the record low is 40°F (2004).
McAllen weather in June
In June, McAllen averages a high of 96°F and a low of 76°F. It gets 3.0 in of precipitation over about 4 rainy days. The sun is out about 62% of daylight hours. The June record high is 109°F (2017) and the record low is 60°F (1970).
McAllen weather in July
In July, McAllen averages a high of 97°F and a low of 77°F. It gets 1.6 in of precipitation over about 3 rainy days. The sun is out about 54% of daylight hours. The July record high is 107°F (2009) and the record low is 62°F (1974).
McAllen weather in August
In August, McAllen averages a high of 98°F and a low of 77°F. It gets 1.4 in of precipitation over about 3 rainy days. The sun is out about 59% of daylight hours. The August record high is 106°F (2017) and the record low is 57°F (2001).
McAllen weather in September
In September, McAllen averages a high of 94°F and a low of 74°F. It gets 3.8 in of precipitation over about 6 rainy days. The sun is out about 60% of daylight hours. The September record high is 108°F (2000) and the record low is 54°F (1981).
McAllen weather in October
In October, McAllen averages a high of 88°F and a low of 66°F. It gets 2.0 in of precipitation over about 4 rainy days. The sun is out about 59% of daylight hours. The October record high is 105°F (2012) and the record low is 43°F (1970).
McAllen weather in November
In November, McAllen averages a high of 79°F and a low of 58°F. It gets 1.1 in of precipitation over about 3 rainy days. The sun is out about 53% of daylight hours. The November record high is 98°F (2016) and the record low is 31°F (1970). November is one of the most comfortable months to visit.
McAllen weather in December
In December, McAllen averages a high of 72°F and a low of 51°F. It gets 0.6 in of precipitation over about 3 rainy days. The sun is out about 53% of daylight hours. The December record high is 94°F (1977) and the record low is 18°F (1989). December is one of the most comfortable months to visit.
Sunshine, humidity and wind in McAllen
June is the sunniest month in McAllen, with sunshine about 62% of daylight hours. April is the cloudiest, at 41%. Over the year the sun shines about 53% of daylight hours. McAllen is sunnier than 69% of the US.
Humidity peaks in May at 70% and is lowest in March at 60%.
McAllen has about 150 days a year above 90°F. McAllen is hotter than 99% of the US.
Thunderstorms occur on about 2 days a year.
See where McAllen ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
McAllen weather records
The hottest temperature on record at the McAllen station is 110°F, on May 10, 2024. The coldest is 18°F, on December 26, 1983.
The wettest day on record brought 7.8 in of rain, on August 10, 1980.
23 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.9°F per decade since 1970.
The best time to visit McAllen
The most comfortable time to visit is typically January to February and November to December, when daytime highs sit near 75°F.
Winter (December–February) is warm, with average highs around 73°F and lows near 52°F.
Spring (March–May) is hot, with average highs around 86°F and lows near 66°F.
Summer (June–August) is hot, with average highs around 97°F and lows near 77°F.
Autumn (September–November) is hot, with average highs around 87°F and lows near 66°F.
Monthly climate
| Month | Precip | Rain days | Humidity | Sunshine | Record high | Record low |
|---|---|---|---|---|---|---|
| January | 0.65 in | 3 | 63% | 46% | 93° | 24° |
| February | 0.64 in | 3 | 63% | 49% | 100° | 20° |
| March | 1.0 in | 3 | 60% | 46% | 104° | 31° |
| April | 1.4 in | 3 | 65% | 41% | 109° | 39° |
| May | 1.4 in | 3 | 70% | 50% | 110° | 40° |
| June | 3.0 in | 4 | 67% | 62% | 109° | 60° |
| July | 1.6 in | 3 | 65% | 54% | 107° | 62° |
| August | 1.4 in | 3 | 64% | 59% | 106° | 57° |
| September | 3.8 in | 6 | 67% | 60% | 108° | 54° |
| October | 2.0 in | 4 | 64% | 59% | 105° | 43° |
| November | 1.1 in | 3 | 69% | 53% | 98° | 31° |
| December | 0.57 in | 3 | 68% | 53% | 94° | 18° |
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
McAllen climate questions
How much rain does McAllen get?
McAllen gets 18.7 in of precipitation in an average year, over about 40 rainy days.
What is the wettest month in McAllen?
September is the wettest month in McAllen, with 3.8 in. December is the driest, with 0.6 in.
How many rainy days does McAllen have a year?
McAllen has about 40 days with measurable rain in an average year. September has the most, about 6.
Does it snow in McAllen?
Rarely. The reporting station for McAllen averages under 0.5 in of snow a season.
What is the hottest month in McAllen?
August is the warmest month in McAllen, with an average high of 98°F.
What is the coldest month in McAllen?
January is the coldest month in McAllen, with an average low of 50°F.
What is the record high temperature in McAllen?
The record high at the McAllen station is 110°F, set on May 10, 2024. The record low is 18°F, on December 26, 1983.
What is the sunniest month in McAllen?
June is the sunniest month in McAllen, with sunshine about 62% of daylight hours. April is the cloudiest.
What is the best time to visit McAllen?
The most comfortable time to visit is typically January to February and November to December, when daytime highs sit near 75°F.
Source: NOAA GHCN-Daily station MCALLEN (2 km away).
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Climate for places near McAllen, TX
Normals from NOAA GHCN-Daily station MCALLEN.