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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Mercedes, TX
Content continues below
May
Average Temperature
High
31°
Feels 34
Low
22°
Feels 23
Average Precipitation
13 Days
Rain amount
87mm
Snow amount
0cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
33°
18
34°
19
34°
20
33°
21
29°
22
30°
23
31°
24
32°
25
31°
26
31°
27
32°
28
31°
29
31°
30
31°
31
31°
Forecast
Sunday, May 17, 2026
Day
33°
Feels 39
Wind
34 km/h S
Gust
51 km/h
Humidity
49%
P.O.P
30%
Night
26°
Feels 29
Wind
30 km/h SE
Gust
45 km/h
Humidity
89%
P.O.P
30%
Historical Averages
May 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.