Boone County climate

Boone County Weather in May

NOAA 1991-2020 normals for Whitestown, 11.5 km from Boone County

Average highs run from 69°F on May 1 to 77°F on May 31, and lows from 48°F to 58°F. Normal precipitation for the month is 4.56 in over about 11 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 Boone County, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
73°F
Average low
53°F
Precipitation
4.56 in
Record high
99°FMay 31, 1934
Record low
24°FMay 9, 1947
Chance of a freeze
21%
Days of 90°F or more
0.6
Daylight
13 h 55 min to 14 h 49 min
Cloud cover
66%
Humidity
79%
Dew point
55°F
Wind
9.8 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°F48°F90°F 195125°F 190336%0%
May 269°F48°F87°F 190128°F 190836%0%
May 369°F49°F89°F 194929°F 197136%0%
May 469°F49°F87°F 195226°F 190336%0%
May 570°F49°F92°F 195228°F 190736%0%
May 670°F50°F88°F 192427°F 196836%0%
May 770°F50°F89°F 192627°F 197436%0%
May 871°F50°F89°F 200729°F 197636%0%
May 971°F51°F91°F 193624°F 194736%0%
May 1071°F51°F91°F 193627°F 196636%0%
May 1171°F51°F89°F 197928°F 190736%0%
May 1272°F52°F86°F 195632°F 193835%0%
May 1372°F52°F88°F 195631°F 193835%0%
May 1472°F52°F89°F 198231°F 191035%0%
May 1572°F53°F89°F 196232°F 197335%0%
May 1673°F53°F91°F 196229°F 190435%0%
May 1773°F53°F93°F 196232°F 197335%0%
May 1873°F54°F93°F 196233°F 197335%0%
May 1974°F54°F91°F 191132°F 200235%0%
May 2074°F54°F92°F 193435°F 190635%0%
May 2174°F54°F94°F 194127°F 190734%0%
May 2274°F55°F96°F 192530°F 192434%0%
May 2375°F55°F93°F 192533°F 196334%0%
May 2475°F55°F91°F 192135°F 193134%0%
May 2575°F56°F94°F 193928°F 192534%0%
May 2676°F56°F95°F 191134°F 192434%0%
May 2776°F56°F98°F 191130°F 196134%0%
May 2876°F57°F96°F 191130°F 190734%0%
May 2976°F57°F93°F 191433°F 193233%0%
May 3077°F57°F94°F 193432°F 194733%0%
May 3177°F58°F99°F 193434°F 193033%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Boone County, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

May 1
sunrise 6:46 AM, sunset 8:41 PM
May 31
sunrise 6:19 AM, sunset 9:08 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00129557 (Whitestown), public domain. Records: NOAA GHCN-Daily, station USC00129557, 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.