Climate in Mcallen (Texas)

The climate of McAllen is sub-tropical, with a very mild winter (but with the possibility of short cold spells) and a very hot, muggy summer.
The city is located in the southern tip of Texas, near the Mexican border, and 100 km (60 mi) away from the coast. The metropolitan area includes the neighboring cities of Edinburg and Mission. Across the Rio Grande River lies the Mexican city of Reynosa.
The average temperature of the coldest month (January) is of 17.1 °C (63 °F), that of the warmest month (August) is of 31.8 °C (89 °F). We are in one of the hottest cities in the United States, one of the few where the average annual maximum temperature reaches 30 °C (86 °F).
Precipitation amounts to 565 millimeters (22.2 inches) per year.



The winter, from December to February, is mild.
The sun shines quite often, although there are periods characterized by clouds, rain and wind.
There may be hot periods even in the middle of winter, with highs around 30 °C (86 °F) and more.
However, there may also be brief cold periods, with highs below 10 °C (50 °F). Very rarely, as happened on Christmas 2004, in December 2017 and in February 2021, it can even snow. In recent decades, the record is -8 °C (17.5 °F), recorded in December 1989.

The summer, from June to September, is very hot and sunny, with some thunderstorms. There combination of humidity and temperature makes the heat sweltering.
There can be long, very hot periods even in May and October, and sometimes in late April, while for short periods, the temperature can reach about 40 °C (104 °F) from March to October. The record is 44 °C (111 °F), recorded in June 2017.

From June to November (but with a higher probability from August to October), there is the risk of hurricanes. In general, hurricanes weaken when they penetrate inland, however, they can still bring abundant rains, as happened in July 2008 with Hurricane Dolly and in July 2020 with Hurricane Hanna.

Best Time

The best time to visit McAllen is from November to March. Winter, from December to February, is generally a mild season, although it can sometimes get cold (especially in December and January). You can therefore choose the months of March and November.

Mcallen - Climate data

In Mcallen, the average temperature of the coldest month (January) is of 17.1 °C (62.8 °F), that of the warmest month (August) is of 31.8 °C (89.3 °F). Here are the average temperatures.
Precipitation amounts to 565 millimeters (22.2 inches) per year: so, it is at an intermediate level. It ranges from 20 mm (0.8 in) in the driest months (January, February) to 115 mm (4.5 in) in the wettest one (September). Here is the average precipitation.

McAllen - Weather by month

Based on the period 1991-2020

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January, the coldest month of the year, is generally a very mild month. The average temperature is of 17.1 °C (63 °F), with a minimum of 11.5 °C (52.7 °F) and a maximum of 22.7 °C (72.8 °F).
On the coldest nights of the month, the temperature usually drops to around 2.5 °C (36 °F). However, it dropped to -2.2 °C (28 °F) in January 2002.
On the warmest days of the month, the temperature usually reaches around 31 °C (87.5 °F). However, it reached 35.6 °C (96.1 °F) in January 2017.
Precipitation amounts to 20 mm (0.8 in), distributed over 6 days.
The day lasts on average 10 hours and 40 minutes.
The average humidity is 68%.
The average wind speed is 15 kph (10 mph).

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February is generally a warm month. The average temperature is of 19.5 °C (67 °F), with a minimum of 13.8 °C (56.9 °F) and a maximum of 25.2 °C (77.4 °F).
On the coldest nights of the month, the temperature usually drops to around 4 °C (39 °F). However, it dropped to -5.6 °C (21.9 °F) in February 1996.
On the warmest days of the month, the temperature usually reaches around 33.5 °C (92.5 °F). However, it reached 38.3 °C (100.9 °F) in February 2017.
Precipitation amounts to 20 mm (0.8 in), distributed over 4 days.
The day lasts on average 11 hours and 20 minutes.
The average humidity is 68%.
The average wind speed is 17 kph (11 mph).

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March is generally a warm to hot month. The average temperature is of 22.8 °C (73 °F), with a minimum of 17.1 °C (62.7 °F) and a maximum of 28.4 °C (83.2 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 6.5 °C (44 °F). However, it dropped to 2.2 °C (36 °F) in March 2014.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 35.5 °C (96 °F). However, it reached 40 °C (104 °F) in March 2008.
Precipitation amounts to 35 mm (1.4 in), distributed over 4 days.
The day lasts on average 12 hours and 0 minutes.
The average humidity is 66%.
The average wind speed is 19 kph (12 mph).

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April is generally a warm to hot month. The average temperature is of 25.8 °C (78 °F), with a minimum of 20.2 °C (68.4 °F) and a maximum of 31.3 °C (88.4 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 10.5 °C (51 °F). However, it dropped to 4.4 °C (39.9 °F) in April 2007.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 37 °C (98.5 °F). However, it reached 41.7 °C (107.1 °F) in April 2014.
Precipitation amounts to 35 mm (1.4 in), distributed over 4 days.
The day lasts on average 12 hours and 50 minutes.
The average humidity is 67%.
The average wind speed is 20 kph (12 mph).

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May is generally a very hot month. The average temperature is of 28.7 °C (84 °F), with a minimum of 23.4 °C (74.1 °F) and a maximum of 33.9 °C (93.1 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 16.5 °C (61.5 °F). However, it dropped to 10.6 °C (51.1 °F) in May 2004.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 37.5 °C (99 °F). However, it reached 43.3 °C (109.9 °F) in May 1999.
Precipitation amounts to 50 mm (2 in), distributed over 4 days.
The day lasts on average 13 hours and 30 minutes.
The average humidity is 69%.
The average wind speed is 20 kph (12 mph).

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June is generally a very hot month. The average temperature is of 30.9 °C (88 °F), with a minimum of 25.6 °C (78 °F) and a maximum of 36.3 °C (97.4 °F).
On the coldest nights, the temperature usually drops to around 21.5 °C (70.5 °F). However, it dropped to 18.8 °C (65.8 °F) in June 1995.
On the warmest days, the temperature usually reaches around 39 °C (102 °F). However, it reached 43.9 °C (111 °F) in June 2017.
Precipitation amounts to 75 mm (3 in), distributed over 5 days.
The day lasts on average 13 hours and 50 minutes. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
The average humidity is 67%.
The average wind speed is 19 kph (12 mph).

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July is generally a very hot month. The average temperature is of 31.5 °C (89 °F), with a minimum of 26 °C (78.8 °F) and a maximum of 36.9 °C (98.5 °F).
On the coldest nights of the month, the temperature usually drops to around 22.5 °C (73 °F). However, it dropped to 20.6 °C (69.1 °F) in July 2001.
On the warmest days of the month, the temperature usually reaches around 39.5 °C (103.5 °F). However, it reached 42.8 °C (109 °F) in July 2009.
Precipitation amounts to 50 mm (2 in), distributed over 5 days.
The day lasts on average 13 hours and 35 minutes.
The average humidity is 64%.
The average wind speed is 20 kph (12 mph).

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August, the hottest month of the year, is generally a very hot month. The average temperature is of 31.8 °C (89 °F), with a minimum of 26.1 °C (78.9 °F) and a maximum of 37.6 °C (99.6 °F).
On the coldest nights of the month, the temperature usually drops to around 23 °C (73.5 °F). However, it dropped to 20 °C (68 °F) in August 2004.
On the warmest days of the month, the temperature usually reaches around 40 °C (104 °F). However, it reached 41.7 °C (107.1 °F) in August 2012.
Precipitation amounts to 45 mm (1.8 in), distributed over 5 days.
The day lasts on average 13 hours and 0 minutes.
The average humidity is 63%.
The average wind speed is 17 kph (11 mph).

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September is generally a very hot month. The average temperature is of 29.4 °C (85 °F), with a minimum of 24.2 °C (75.6 °F) and a maximum of 34.6 °C (94.3 °F).
On the coldest nights, the temperature usually drops to around 18 °C (64.5 °F). However, it dropped to 14.4 °C (57.9 °F) in September 1991.
On the warmest days, the temperature usually reaches around 38.5 °C (101 °F). However, it reached 42.2 °C (108 °F) in September 2011.
Precipitation amounts to 115 mm (4.5 in), distributed over 8 days.
The day lasts on average 12 hours and 20 minutes.
The average humidity is 70%.
The average wind speed is 13 kph (8 mph).

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October is generally a warm to hot month. The average temperature is of 26.1 °C (79 °F), with a minimum of 20.4 °C (68.7 °F) and a maximum of 31.8 °C (89.3 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 10.5 °C (50.5 °F). However, it dropped to 0.5 °C (32.9 °F) in October 1993.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 36 °C (97 °F). However, it reached 40 °C (104 °F) in October 2012.
Precipitation amounts to 55 mm (2.2 in), distributed over 6 days.
The day lasts on average 11 hours and 30 minutes.
The average humidity is 68%.
The average wind speed is 14 kph (9 mph).

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November is generally a warm month. The average temperature is of 21.2 °C (70 °F), with a minimum of 15.6 °C (60.1 °F) and a maximum of 26.8 °C (80.2 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 5.5 °C (42 °F). However, it dropped to 0 °C (32 °F) in November 1992.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 33 °C (91.5 °F). However, it reached 37.2 °C (99 °F) in November 2016.
Precipitation amounts to 30 mm (1.2 in), distributed over 5 days.
The day lasts on average 10 hours and 50 minutes.
The average humidity is 69%.
The average wind speed is 15 kph (9 mph).

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December is generally a very mild month. The average temperature is of 17.8 °C (64 °F), with a minimum of 12.3 °C (54.1 °F) and a maximum of 23.2 °C (73.8 °F).
On the coldest nights of the month, the temperature usually drops to around 2.5 °C (36.5 °F). However, it dropped to -3 °C (26.6 °F) in December 1996.
On the warmest days of the month, the temperature usually reaches around 31 °C (87.5 °F). However, it reached 33.9 °C (93 °F) in December 2016.
Precipitation amounts to 25 mm (1 in), distributed over 6 days.
The day lasts on average 10 hours and 30 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average humidity is 69%.
The average wind speed is 15 kph (9 mph).