Annual mean 24°C · wettest around June · prevailing wind SE
Warmest
35.5 °C
Coldest
19.2 °C
Wettest
53%
Windiest
5.4 m/s
Prevailing
SE
4.5 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in McAllen over the whole year is 24°C. August is the hottest month, with highs of about 35°C; January is the coldest, with lows of about 12°C. McAllen has no sharply defined rainy season: the chance of rain on a given day runs from 36% in February, the driest month, to 46% in June, the wettest. Winds in McAllen are highest in May, averaging 4.1 m/s (15 km/h), and lightest in September, at 2.8 m/s (10 km/h). The prevailing wind is from the SE. The clearest skies in McAllen come in August, when the sky is typically 25% covered; April is the cloudiest month, at 54%.
Month by month McAllen climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
20°C
12°C
17°C
38%
49%
3.3 m/s
58
14
58
February
22°C
14°C
19°C
36%
49%
3.9 m/s
56
28
43
March
26°C
18°C
24°C
36%
53%
4.0 m/s
57
40
33
April
29°C
21°C
27°C
39%
54%
4.0 m/s
40
54
16
May
32°C
24°C
32°C
43%
53%
4.1 m/s
12
50
2
June
34°C
26°C
35°C
46%
35%
3.7 m/s
2
28
0
July
34°C
26°C
35°C
41%
28%
3.9 m/s
3
24
0
August
35°C
26°C
36°C
39%
25%
3.5 m/s
1
14
1
September
33°C
24°C
34°C
43%
32%
2.8 m/s
6
29
1
October
30°C
20°C
29°C
41%
37%
2.8 m/s
21
50
12
November
24°C
16°C
23°C
42%
49%
2.9 m/s
46
44
32
December
22°C
14°C
20°C
39%
51%
3.0 m/s
61
27
49
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short McAllen weather by season
Year round, McAllen has days of about 20°C at their warmest in January, its coolest month, and 35°C in August, its warmest; the coolest hours of the day run from 12°C to 26°C through the year, and the average temperature over the year is 24°C around the clock. Rain is most likely around June and least likely around February. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
McAllen weather in winterDecember to February
High 21°CLow 13°CRain 37%
Winter in McAllen has typical daily highs of about 21°C and lows of about 13°C, with a 37% chance of rain on a given day.
McAllen weather in springMarch to May
High 29°CLow 21°CRain 39%
Spring in McAllen has typical daily highs of about 29°C and lows of about 21°C, with a 39% chance of rain on a given day.
McAllen weather in summerJune to August
High 34°CLow 26°CRain 42%
Summer in McAllen has typical daily highs of about 34°C and lows of about 26°C, with a 42% chance of rain on a given day.
McAllen weather in autumnSeptember to November
High 29°CLow 20°CRain 42%
Autumn in McAllen has typical daily highs of about 29°C and lows of about 20°C, with a 42% chance of rain on a given day.
When is the rainy season in McAllen?
McAllen has no sharply defined rainy season: the chance of rain on a given day runs from 36% in February, the driest month, to 46% in June, the wettest.
What time of year is McAllen windiest?
Winds in McAllen are highest in May, averaging 4.1 m/s (15 km/h), and lightest in September, at 2.8 m/s (10 km/h). The prevailing wind is from the SE.
What is the average temperature in McAllen year round?
The average temperature in McAllen over the whole year is 24°C. August is the hottest month, with highs of about 35°C; January is the coldest, with lows of about 12°C.