Climateby Month

McAllen, TX climate by month

NOAA 1991-2020 normals · 119 ft elevation · also covers Edinburg

Summers in McAllen are very hot and oppressively humid; winters are mild. Highs peak at 100°F in August and fall to 73°F in January. The wettest month is September (about 8 wet days) and the driest is April (about 4). The most comfortable time to visit is January and December.

Warmest month
100°F
August normal high
Coldest month
53°F
January normal low
Wet days a year
62
22.2 in of precipitation
Muggy days a year
211
dew point 65°F or higher

How warm is McAllen?

Normal highs range from 73°F in January to 100°F in August.

50°60°70°80°90°100° January: normal high 73°F (23°C), low 53°F (12°C) 73° 53° February: normal high 77°F (25°C), low 57°F (14°C) March: normal high 83°F (28°C), low 63°F (17°C) April: normal high 88°F (31°C), low 68°F (20°C) May: normal high 93°F (34°C), low 74°F (23°C) June: normal high 97°F (36°C), low 78°F (26°C) July: normal high 99°F (37°C), low 79°F (26°C) August: normal high 100°F (38°C), low 79°F (26°C) 100° 79° September: normal high 94°F (34°C), low 76°F (24°C) October: normal high 89°F (32°C), low 69°F (21°C) November: normal high 80°F (27°C), low 60°F (16°C) December: normal high 74°F (23°C), low 54°F (12°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is McAllen?

September has the most wet days (about 8); the year brings about 22 in of precipitation.

January: 6 wet days February: 5 wet days March: 4 wet days April: 4 wet days 4 May: 4 wet days June: 5 wet days July: 5 wet days August: 5 wet days September: 8 wet days 8 October: 6 wet days November: 5 wet days December: 6 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How humid is McAllen?

Muggy days peak in July, at about 31 days.

January: 3 muggy days 3 February: 4 muggy days March: 10 muggy days April: 17 muggy days May: 27 muggy days June: 30 muggy days July: 31 muggy days 31 August: 31 muggy days September: 27 muggy days October: 19 muggy days November: 9 muggy days December: 4 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Mc Allen Miller Intl Arpt, 1.9 mi SSW of the city center.

How much daylight?

Daylight ranges from about 10.5 hours in December to 13.8 hours in June.

January: 10.7 hours of daylight February: 11.3 hours of daylight March: 12.0 hours of daylight April: 12.8 hours of daylight May: 13.4 hours of daylight June: 13.8 hours of daylight 13.8 July: 13.6 hours of daylight August: 13.0 hours of daylight September: 12.3 hours of daylight October: 11.5 hours of daylight November: 10.9 hours of daylight December: 10.5 hours of daylight 10.5 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for McAllen, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 73°F53°F 0.8 in6 0.0 in 3 10.7 h
February 77°F57°F 0.7 in5 0.0 in 4 11.3 h
March 83°F63°F 1.4 in4 0.0 in 10 12.0 h
April 88°F68°F 1.4 in4 0.0 in 17 12.8 h
May 93°F74°F 2.0 in4 0.0 in 27 13.4 h
June 97°F78°F 3.0 in5 0.0 in 30 13.8 h
July 99°F79°F 2.0 in5 0.0 in 31 13.6 h
August 100°F79°F 1.8 in5 0.0 in 31 13.0 h
September 94°F76°F 4.6 in8 0.0 in 27 12.3 h
October 89°F69°F 2.1 in6 0.0 in 19 11.5 h
November 80°F60°F 1.2 in5 0.0 in 9 10.9 h
December 74°F54°F 1.1 in6 0.1 in 4 10.5 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit McAllen

By our comfort score, the best months are January and December.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 651421
Feb 611022
Mar 56726
Apr 472213
May 390324
Jun 350328
Jul 350330
Aug 340330
Sep 330624
Oct 412316
Nov 57923
Dec 621231

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in McAllen

A night at 32°F or below happens in about 29% of years in McAllen, so there is no typical frost date. In most years there is no frost at all.

Station: Mcallen Miller Intl Airport (USW00012959), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Texas.

Hottest and coldest readings, 1991-2020

The highest reading was 111°F (June 22, 2017); the lowest was 24°F (February 2, 1996).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near McAllen

Similar climates elsewhere

Also covers

Edinburg uses the same temperature and rain stations as McAllen, so its monthly numbers are the ones on this page.

Where the numbers come from

  • Temperature, rain, frost dates, humidity and wind by hour and cloud cover: Mcallen Miller Intl Airport (USW00012959), 2.0 mi SW of the city center, 100 ft . NOAA normals and daily records, 1991-2020.
  • Snowfall and snow depth: Mcallen (USC00415701), 1.5 mi WSW of the city center, 100 ft . NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Mc Allen Miller Intl Arpt (722506-12959), 1.9 mi SSW of the city center, 99 ft . Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error