Alamo climate

Alamo Weather in May

NOAA 1991-2020 normals for Mcallen, 12.8 km from Alamo

Average highs run from 89°F on May 1 to 95°F on May 31, and lows from 68°F to 74°F. Normal precipitation for the month is 1.39 in over about 3 wet days.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Alamo, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
92°F
Average low
71°F
Precipitation
1.39 in
Record high
111°FMay 9, 2024
Record low
51°FMay 3, 2004
Chance of a freeze
0%
Days of 90°F or more
21.5
Daylight
13 h 09 min to 13 h 40 min
Cloud cover
52%
Humidity
66%
Dew point
68°F
Wind
13.0 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
May 189°F68°F100°F 198057°F 199411%0%
May 289°F69°F105°F 198454°F 197610%0%
May 389°F69°F107°F 198451°F 200410%0%
May 489°F69°F110°F 199952°F 201310%0%
May 589°F69°F106°F 199952°F 197011%0%
May 690°F69°F101°F 202657°F 197011%0%
May 790°F70°F100°F 196761°F 199211%0%
May 890°F70°F104°F 202459°F 199211%0%
May 990°F70°F111°F 202459°F 196111%0%
May 1090°F70°F102°F 200654°F 196111%0%
May 1190°F70°F106°F 197455°F 196111%0%
May 1291°F71°F104°F 201761°F 197911%0%
May 1391°F71°F103°F 199560°F 199311%0%
May 1491°F71°F99°F 202553°F 197611%0%
May 1591°F71°F100°F 202554°F 201411%0%
May 1692°F72°F100°F 200353°F 201411%0%
May 1792°F72°F100°F 201853°F 197011%0%
May 1892°F72°F100°F 198958°F 197012%0%
May 1992°F72°F102°F 202460°F 200912%0%
May 2092°F72°F102°F 202460°F 202112%0%
May 2193°F72°F100°F 202463°F 198612%0%
May 2293°F73°F101°F 200861°F 196712%0%
May 2393°F73°F102°F 200859°F 196712%0%
May 2493°F73°F102°F 202460°F 196712%0%
May 2594°F73°F103°F 198962°F 196712%0%
May 2694°F73°F103°F 202466°F 196712%0%
May 2794°F74°F107°F 197358°F 196712%0%
May 2894°F74°F102°F 202465°F 197612%0%
May 2994°F74°F102°F 200564°F 199212%0%
May 3095°F74°F103°F 200465°F 198412%0%
May 3195°F74°F106°F 196760°F 198412%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Alamo, in percent, and of at least 0.1 inch of snowfall.02.557.51012.51102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

May 1
sunrise 6:55 AM, sunset 8:04 PM
May 31
sunrise 6:40 AM, sunset 8:20 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00415701 (Mcallen), public domain. Records: NOAA GHCN-Daily, station USW00012959, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.