McLean climate

McLean Weather in May

NOAA 1991-2020 normals for Mc Lean, 0.8 km from McLean

Average highs run from 77°F on May 1 to 86°F on May 31, and lows from 49°F to 59°F. Normal precipitation for the month is 3.91 in over about 6 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 McLean, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
81°F
Average low
54°F
Precipitation
3.91 in
Record high
104°FMay 30, 2011
Record low
26°FMay 3, 2013
Chance of a freeze
8%
Days of 90°F or more
5.5
Daylight
13 h 37 min to 14 h 22 min
Cloud cover
52%
Humidity
54%
Dew point
49°F
Wind
11.6 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°F49°F93°F 200230°F 200517%0%
May 277°F49°F96°F 199230°F 201318%0%
May 377°F50°F96°F 201226°F 201318%0%
May 478°F50°F97°F 199626°F 201318%0%
May 578°F50°F97°F 201230°F 197818%0%
May 678°F51°F98°F 201234°F 201318%0%
May 778°F51°F98°F 200035°F 197618%0%
May 879°F51°F96°F 200033°F 197619%0%
May 979°F52°F98°F 201134°F 197619%0%
May 1079°F52°F98°F 202235°F 198119%0%
May 1180°F52°F99°F 202235°F 198119%0%
May 1280°F53°F99°F 201836°F 200819%0%
May 1380°F53°F97°F 201834°F 196619%0%
May 1480°F53°F97°F 202633°F 197119%0%
May 1581°F54°F100°F 202637°F 196719%0%
May 1681°F54°F102°F 199637°F 198320%0%
May 1781°F54°F102°F 199635°F 197620%0%
May 1882°F55°F100°F 202235°F 197620%0%
May 1982°F55°F101°F 199636°F 197120%0%
May 2082°F55°F99°F 200435°F 197120%0%
May 2183°F56°F100°F 200637°F 196720%0%
May 2283°F56°F97°F 200540°F 202221%0%
May 2383°F56°F100°F 199640°F 202221%0%
May 2484°F57°F103°F 200041°F 201721%0%
May 2584°F57°F98°F 198941°F 201721%0%
May 2684°F57°F99°F 201243°F 199221%0%
May 2785°F58°F96°F 200642°F 199221%0%
May 2885°F58°F98°F 201240°F 199221%0%
May 2985°F58°F102°F 202240°F 199222%0%
May 3085°F59°F104°F 201141°F 199222%0%
May 3186°F59°F98°F 197445°F 197522%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at McLean, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

May 1
sunrise 6:51 AM, sunset 8:28 PM
May 31
sunrise 6:29 AM, sunset 8:51 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00415770 (Mc Lean), public domain. Records: NOAA GHCN-Daily, station USC00416776, 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.