Union climate

Union Weather in May

NOAA 1991-2020 normals for Union 3 Sse, 5.5 km from Union

Average highs run from 71°F on May 1 to 77°F on May 31, and lows from 44°F to 53°F. Normal precipitation for the month is 4.60 in over about 15 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 Union, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
74°F
Average low
48°F
Precipitation
4.60 in
Record high
92°FMay 19, 2026
Record low
22°FMay 2, 1943
Chance of a freeze
46%
Daylight
13 h 45 min to 14 h 34 min
Cloud cover
67%
Humidity
79%
Dew point
53°F
Wind
4.0 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 171°F44°F85°F 196229°F 191446%0%
May 271°F44°F87°F 201922°F 194346%0%
May 371°F44°F86°F 201026°F 196146%0%
May 471°F45°F87°F 201228°F 190046%0%
May 572°F45°F88°F 191326°F 195447%0%
May 672°F45°F89°F 194928°F 191047%0%
May 772°F46°F90°F 198628°F 197447%0%
May 872°F46°F88°F 194027°F 194747%0%
May 973°F46°F88°F 196324°F 194747%0%
May 1073°F46°F86°F 197924°F 194747%0%
May 1173°F47°F86°F 194826°F 194748%0%
May 1273°F47°F86°F 194430°F 194148%0%
May 1373°F47°F86°F 191629°F 192848%0%
May 1474°F48°F87°F 190025°F 199648%0%
May 1574°F48°F89°F 190027°F 192048%0%
May 1674°F48°F89°F 190030°F 197348%0%
May 1774°F48°F89°F 198629°F 195649%0%
May 1874°F49°F90°F 196231°F 197349%0%
May 1975°F49°F92°F 202630°F 200249%0%
May 2075°F49°F92°F 202626°F 200249%0%
May 2175°F50°F91°F 202229°F 199348%0%
May 2275°F50°F91°F 202224°F 200248%0%
May 2376°F50°F88°F 190330°F 196148%0%
May 2476°F51°F89°F 193932°F 196148%0%
May 2576°F51°F88°F 190428°F 193048%0%
May 2676°F51°F92°F 191430°F 192548%0%
May 2776°F52°F86°F 190824°F 192548%0%
May 2877°F52°F87°F 190829°F 199448%0%
May 2977°F52°F89°F 191432°F 190248%0%
May 3077°F53°F90°F 196933°F 193248%0%
May 3177°F53°F90°F 200632°F 194748%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Union, in percent, and of at least 0.1 inch of snowfall.010203040501102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

May 1
sunrise 6:27 AM, sunset 8:12 PM
May 31
sunrise 6:03 AM, sunset 8:37 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00469011 (Union 3 Sse), public domain. Records: NOAA GHCN-Daily, station USC00465224, 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.