Willacy County climate

Willacy County Weather in May

NOAA 1991-2020 normals for Port Mansfield, 18.8 km from Willacy County

Average highs run from 83°F on May 1 to 88°F on May 31, and lows from 70°F to 76°F. Normal precipitation for the month is 2.39 in over about 4 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 Willacy County, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
85°F
Average low
73°F
Precipitation
2.39 in
Record high
107°FMay 9, 2024
Record low
50°FMay 3, 2004
Chance of a freeze
0%
Days of 90°F or more
2.0
Daylight
13 h 10 min to 13 h 41 min
Cloud cover
52%
Humidity
75%
Dew point
70°F
Wind
12.8 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 183°F70°F102°F 195355°F 201712%0%
May 283°F70°F98°F 200255°F 200412%0%
May 383°F70°F100°F 200250°F 200412%0%
May 483°F70°F103°F 199951°F 195412%0%
May 583°F70°F103°F 199955°F 201712%0%
May 684°F71°F96°F 199857°F 201312%0%
May 784°F71°F100°F 199857°F 196013%0%
May 884°F71°F99°F 200352°F 196013%0%
May 984°F71°F107°F 202460°F 196113%0%
May 1084°F72°F102°F 200658°F 196113%0%
May 1184°F72°F97°F 195955°F 196113%0%
May 1285°F72°F97°F 201758°F 196013%0%
May 1385°F72°F97°F 201156°F 196013%0%
May 1485°F72°F95°F 201759°F 201413%0%
May 1585°F73°F96°F 200354°F 201414%0%
May 1685°F73°F97°F 200352°F 201414%0%
May 1785°F73°F97°F 200258°F 201414%0%
May 1886°F73°F96°F 195360°F 200914%0%
May 1986°F73°F98°F 200355°F 200914%0%
May 2086°F74°F101°F 201161°F 200214%0%
May 2186°F74°F100°F 202258°F 200914%0%
May 2286°F74°F98°F 201764°F 200914%0%
May 2387°F74°F98°F 202464°F 200114%0%
May 2487°F74°F100°F 202462°F 201714%0%
May 2587°F75°F100°F 202462°F 201714%0%
May 2687°F75°F99°F 201168°F 199914%0%
May 2787°F75°F100°F 201766°F 201014%0%
May 2888°F75°F101°F 202466°F 199714%0%
May 2988°F75°F100°F 201167°F 199714%0%
May 3088°F75°F98°F 201168°F 200214%0%
May 3188°F76°F101°F 200567°F 202314%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Willacy County, in percent, and of at least 0.1 inch of snowfall.0510151102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

May 1
sunrise 6:53 AM, sunset 8:03 PM
May 31
sunrise 6:38 AM, sunset 8:19 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00417184 (Port Mansfield), public domain. Records: NOAA GHCN-Daily, station USW00012904, 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.