Oskaloosa climate

Oskaloosa Weather in May

NOAA 1991-2020 normals for Oskaloosa 4 Ne, 4.6 km from Oskaloosa

Average highs run from 71°F on May 1 to 81°F on May 31, and lows from 49°F to 59°F. Normal precipitation for the month is 5.31 in over about 9 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 Oskaloosa, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
76°F
Average low
54°F
Precipitation
5.31 in
Record high
98°FMay 30, 1998
Record low
25°FMay 2, 2005
Chance of a freeze
8%
Days of 90°F or more
0.8
Daylight
13 h 52 min to 14 h 44 min
Cloud cover
62%
Humidity
74%
Dew point
55°F
Wind
10.7 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 171°F49°F85°F 200129°F 199731%0%
May 271°F49°F84°F 201225°F 200531%0%
May 371°F50°F86°F 201226°F 200531%0%
May 472°F50°F89°F 201232°F 200831%0%
May 572°F50°F90°F 201233°F 202131%0%
May 672°F51°F95°F 202338°F 201131%0%
May 773°F51°F91°F 202336°F 202031%0%
May 873°F52°F88°F 201836°F 202031%0%
May 973°F52°F92°F 201132°F 202031%0%
May 1074°F52°F92°F 202233°F 199731%0%
May 1174°F53°F93°F 200035°F 202031%0%
May 1274°F53°F94°F 202232°F 201331%0%
May 1375°F54°F93°F 201831°F 199731%0%
May 1475°F54°F95°F 201339°F 200031%0%
May 1575°F54°F90°F 200137°F 200531%0%
May 1676°F55°F93°F 200132°F 201431%0%
May 1776°F55°F89°F 199835°F 201431%0%
May 1877°F55°F92°F 199737°F 201431%0%
May 1977°F56°F96°F 199842°F 201631%0%
May 2077°F56°F90°F 199841°F 200031%0%
May 2178°F56°F89°F 199842°F 200331%0%
May 2278°F57°F93°F 200040°F 202231%0%
May 2378°F57°F93°F 201241°F 202231%0%
May 2479°F57°F91°F 200044°F 202631%0%
May 2579°F58°F90°F 201245°F 201731%0%
May 2679°F58°F94°F 201846°F 199931%0%
May 2780°F58°F94°F 201844°F 202231%0%
May 2880°F59°F94°F 201846°F 202331%0%
May 2981°F59°F94°F 201843°F 199731%0%
May 3081°F59°F98°F 199846°F 202132%0%
May 3181°F59°F93°F 200047°F 200132%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Oskaloosa, 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 6:23 AM, sunset 8:15 PM
May 31
sunrise 5:57 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 USC00146100 (Oskaloosa 4 Ne), public domain. Records: NOAA GHCN-Daily, station USW00003997, 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.