Franklin County climate

Franklin County Weather in May

NOAA 1991-2020 normals for Ottawa, 5.4 km from Franklin County

Average highs run from 70°F on May 1 to 80°F on May 31, and lows from 47°F to 59°F. Normal precipitation for the month is 5.82 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 Franklin County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
75°F
Average low
53°F
Precipitation
5.82 in
Record high
101°FMay 31, 2000
Record low
21°FMay 4, 1907
Chance of a freeze
10%
Days of 90°F or more
1.3
Daylight
13 h 49 min to 14 h 40 min
Cloud cover
60%
Humidity
75%
Dew point
56°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 170°F47°F90°F 195225°F 190940%0%
May 271°F48°F89°F 195227°F 190940%0%
May 371°F48°F92°F 195230°F 190340%0%
May 471°F49°F92°F 195221°F 190740%0%
May 572°F49°F95°F 195233°F 194440%0%
May 672°F49°F88°F 191629°F 194441%0%
May 772°F50°F93°F 202331°F 198941%0%
May 873°F50°F93°F 202333°F 191741%0%
May 973°F51°F89°F 191129°F 190641%0%
May 1073°F51°F91°F 196230°F 190941%0%
May 1174°F51°F90°F 196233°F 198141%0%
May 1274°F52°F92°F 196234°F 201341%0%
May 1374°F52°F91°F 191535°F 191041%0%
May 1475°F53°F90°F 191535°F 190440%0%
May 1575°F53°F91°F 201331°F 190740%0%
May 1675°F53°F95°F 193133°F 201440%0%
May 1776°F54°F90°F 190235°F 201440%0%
May 1876°F54°F92°F 195635°F 191040%0%
May 1976°F55°F95°F 200640°F 196840%0%
May 2077°F55°F95°F 190238°F 193140%0%
May 2177°F55°F97°F 195635°F 196740%0%
May 2277°F56°F95°F 195638°F 193140%0%
May 2378°F56°F93°F 193937°F 191740%0%
May 2478°F56°F95°F 193939°F 193540%0%
May 2578°F57°F94°F 196434°F 192539%0%
May 2679°F57°F96°F 195336°F 192539%0%
May 2779°F58°F92°F 189632°F 190739%0%
May 2879°F58°F100°F 189534°F 190739%0%
May 2980°F58°F98°F 191334°F 194739%0%
May 3080°F59°F100°F 193439°F 198439%0%
May 3180°F59°F101°F 200040°F 193038%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Franklin County, 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 6:24 AM, sunset 8:13 PM
May 31
sunrise 5:59 AM, sunset 8:39 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00146128 (Ottawa), public domain. Records: NOAA GHCN-Daily, station USC00146128, 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.