Lake Bluff climate

Lake Bluff Weather in May

NOAA 1991-2020 normals for Chicago Botanic Garden, 16 km from Lake Bluff

Average highs run from 63°F on May 1 to 73°F on May 31, and lows from 43°F to 52°F. Normal precipitation for the month is 4.84 in over about 13 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 Lake Bluff, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
68°F
Average low
48°F
Precipitation
4.84 in
Record high
92°FMay 28, 2012
Record low
25°FMay 3, 2004
Chance of a freeze
35%
Days of 90°F or more
0.9
Daylight
14 h 04 min to 15 h 03 min
Cloud cover
79%
Humidity
77%
Dew point
49°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 163°F43°F86°F 202129°F 202644%
May 263°F43°F86°F 201827°F 202644%
May 364°F44°F85°F 201225°F 200444%
May 464°F44°F82°F 200030°F 200244%
May 564°F44°F82°F 200033°F 201144%
May 665°F45°F85°F 200031°F 202644%
May 765°F45°F83°F 201531°F 201744%
May 865°F45°F87°F 201427°F 202044%
May 966°F46°F82°F 200325°F 202044%
May 1066°F46°F84°F 202232°F 202144%
May 1167°F46°F85°F 202230°F 202144%
May 1267°F47°F85°F 201129°F 202144%
May 1367°F47°F84°F 202230°F 201344%
May 1468°F47°F89°F 200733°F 201643%
May 1568°F47°F87°F 200131°F 201643%
May 1668°F48°F87°F 201733°F 201443%
May 1769°F48°F84°F 201734°F 200243%0%
May 1869°F48°F82°F 202632°F 200243%0%
May 1969°F49°F81°F 201233°F 200843%0%
May 2070°F49°F90°F 201230°F 200243%0%
May 2170°F49°F86°F 202128°F 200243%0%
May 2270°F49°F88°F 202133°F 200642%0%
May 2371°F50°F86°F 200736°F 202542%0%
May 2471°F50°F88°F 200735°F 201342%0%
May 2571°F50°F87°F 201838°F 201342%0%
May 2672°F51°F86°F 201836°F 201342%0%
May 2772°F51°F91°F 201840°F 201142%0%
May 2872°F51°F92°F 201241°F 200442%0%
May 2973°F52°F86°F 200638°F 202142%0%
May 3073°F52°F90°F 201135°F 202141%0%
May 3173°F52°F87°F 201839°F 200941%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Lake Bluff, 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 5:47 AM, sunset 7:51 PM
May 31
sunrise 5:18 AM, sunset 8:21 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00111497 (Chicago Botanic Garden), public domain. Records: NOAA GHCN-Daily, station USW00014880, 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.