Shell Rock climate

Shell Rock Weather in May

NOAA 1991-2020 normals for Allison, 18.5 km from Shell Rock

Average highs run from 65°F on May 1 to 76°F on May 31, and lows from 42°F to 55°F. Normal precipitation for the month is 5.13 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 Shell Rock, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
70°F
Average low
49°F
Precipitation
5.13 in
Snowfall
0.1 in
Record high
97°FMay 27, 2018
Record low
22°FMay 3, 2005
Chance of a freeze
37%
Days of 90°F or more
0.8
Daylight
14 h 06 min to 15 h 06 min
Cloud cover
66%
Humidity
75%
Dew point
51°F
Wind
11.2 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 165°F42°F93°F 202128°F 196634%2%
May 265°F43°F87°F 202124°F 200534%1%
May 365°F43°F85°F 201222°F 200535%1%
May 466°F43°F89°F 195225°F 200535%1%
May 566°F44°F91°F 196229°F 195835%1%
May 666°F44°F87°F 201628°F 197435%1%
May 767°F45°F86°F 200028°F 198936%1%
May 867°F45°F89°F 196328°F 197636%1%
May 968°F46°F90°F 202225°F 202036%1%
May 1068°F46°F93°F 201129°F 196636%1%
May 1168°F47°F93°F 202230°F 198136%1%
May 1269°F47°F94°F 202231°F 196936%0%
May 1369°F47°F88°F 195630°F 195336%0%
May 1470°F48°F96°F 201331°F 196637%0%
May 1570°F48°F92°F 200132°F 200437%0%
May 1670°F49°F90°F 201931°F 199737%0%
May 1771°F49°F92°F 199832°F 201437%0%
May 1871°F50°F93°F 199832°F 200237%0%
May 1971°F50°F93°F 197533°F 200237%0%
May 2072°F50°F92°F 197531°F 195437%0%
May 2172°F51°F90°F 197035°F 199737%0%
May 2273°F51°F90°F 195632°F 196337%0%
May 2373°F52°F90°F 197531°F 196338%0%
May 2473°F52°F92°F 201040°F 196338%0%
May 2574°F53°F92°F 196738°F 197938%0%
May 2674°F53°F94°F 196733°F 196138%0%
May 2774°F53°F97°F 201832°F 197138%0%
May 2875°F54°F95°F 201832°F 196538%0%
May 2975°F54°F94°F 201829°F 196538%0%
May 3075°F55°F92°F 195338°F 196638%0%
May 3176°F55°F93°F 202335°F 197238%0%

Chance of rain

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

May 1
sunrise 6:05 AM, sunset 8:11 PM
May 31
sunrise 5:35 AM, sunset 8:41 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00130157 (Allison), public domain. Records: NOAA GHCN-Daily, station USW00094910, 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.