Glen Ellyn climate

Glen Ellyn Weather in May

NOAA 1991-2020 normals for Wheaton 3 Se, 7.3 km from Glen Ellyn

Average highs run from 69°F on May 1 to 78°F on May 31, and lows from 44°F to 53°F. Normal precipitation for the month is 4.46 in over about 12 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 Glen Ellyn, 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
49°F
Precipitation
4.46 in
Record high
97°FMay 25, 2010
Record low
24°FMay 3, 2004
Chance of a freeze
38%
Days of 90°F or more
1.5
Daylight
14 h 03 min to 15 h 00 min
Cloud cover
79%
Humidity
75%
Dew point
50°F
Wind
11.0 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 169°F44°F88°F 200127°F 200540%0%
May 269°F44°F85°F 200731°F 200540%0%
May 370°F45°F86°F 200124°F 200440%0%
May 470°F45°F87°F 200125°F 200540%0%
May 570°F45°F84°F 201029°F 200240%0%
May 671°F46°F86°F 200032°F 199440%0%
May 771°F46°F87°F 200038°F 199740%0%
May 871°F46°F86°F 200738°F 201040%0%
May 971°F47°F89°F 200432°F 201040%0%
May 1072°F47°F91°F 200432°F 199740%0%
May 1172°F47°F91°F 201132°F 200940%0%
May 1272°F48°F91°F 201132°F 200940%0%
May 1373°F48°F89°F 201130°F 200140%0%
May 1473°F48°F85°F 200032°F 200140%0%
May 1573°F48°F94°F 200734°F 200040%0%
May 1674°F49°F91°F 200130°F 199740%0%
May 1774°F49°F91°F 200130°F 200940%0%
May 1874°F49°F91°F 199829°F 200240%0%
May 1975°F50°F95°F 199630°F 200240%0%
May 2075°F50°F92°F 199638°F 199739%0%
May 2175°F50°F89°F 200925°F 200239%0%
May 2276°F51°F91°F 200927°F 200239%0%
May 2376°F51°F90°F 199437°F 199739%0%
May 2476°F51°F93°F 201038°F 200139%0%
May 2576°F51°F97°F 201036°F 199939%0%
May 2677°F52°F92°F 201035°F 200139%0%
May 2777°F52°F91°F 201027°F 200239%0%
May 2877°F52°F86°F 199838°F 200838%0%
May 2978°F53°F94°F 199836°F 200838%0%
May 3078°F53°F91°F 200732°F 199638%0%
May 3178°F53°F94°F 201032°F 200138%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Glen Ellyn, 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 (CDT).

May 1
sunrise 5:48 AM, sunset 7:51 PM
May 31
sunrise 5:20 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 USC00119221 (Wheaton 3 Se), public domain. Records: NOAA GHCN-Daily, station USC00118324, 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.