Decatur climate

Decatur Weather in May

NOAA 1991-2020 normals for Decatur 4SE, 5.6 km from Decatur

Average highs run from 77°F on May 1 to 83°F on May 31, and lows from 54°F to 62°F. Normal precipitation for the month is 4.86 in.

May day by day

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

Normal daily high and low temperature at Decatur, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
80°F
Average low
58°F
Precipitation
4.86 in
Record high
96°FMay 31, 2011
Record low
37°FMay 9, 2020
Chance of a freeze
0%
Days of 90°F or more
1.4
Daylight
13 h 35 min to 14 h 18 min
Cloud cover
56%
Humidity
79%
Dew point
61°F
Wind
5.6 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 177°F54°F89°F 201241°F 20050%
May 278°F54°F90°F 201242°F 20050%
May 378°F54°F85°F 200741°F 20230%
May 478°F55°F88°F 201439°F 20040%
May 578°F55°F88°F 201242°F 20110%
May 678°F55°F89°F 201244°F 20160%
May 778°F55°F89°F 200439°F 20200%
May 879°F56°F90°F 200446°F 20170%
May 979°F56°F90°F 200437°F 20200%
May 1079°F56°F89°F 201137°F 20200%
May 1179°F57°F90°F 200042°F 19970%
May 1279°F57°F91°F 200546°F 20080%
May 1380°F57°F91°F 199839°F 20130%
May 1480°F57°F93°F 201843°F 20020%
May 1580°F58°F93°F 201846°F 20060%
May 1680°F58°F90°F 199845°F 19970%
May 1780°F58°F92°F 202643°F 20080%
May 1881°F59°F91°F 200045°F 20090%
May 1981°F59°F92°F 202642°F 20020%
May 2081°F59°F93°F 201840°F 20020%
May 2181°F59°F91°F 200443°F 20020%
May 2281°F60°F91°F 199840°F 20020%
May 2382°F60°F93°F 201048°F 20020%
May 2482°F60°F93°F 201951°F 20020%
May 2582°F61°F94°F 201947°F 20130%
May 2682°F61°F94°F 201250°F 20010%
May 2782°F61°F95°F 201253°F 20030%
May 2883°F61°F94°F 200651°F 20030%
May 2983°F62°F94°F 200654°F 20210%
May 3083°F62°F95°F 200653°F 20030%
May 3183°F62°F96°F 201150°F 20210%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Decatur, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

May 1
sunrise 5:58 AM, sunset 7:33 PM
May 31
sunrise 5:37 AM, sunset 7:55 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00012209 (Decatur 4SE), public domain. Records: NOAA GHCN-Daily, station USW00053852, 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.