Marion County climate

Marion County Weather in May

NOAA 1991-2020 normals for Fairmont, 10.9 km from Marion County

Average highs run from 71°F on May 1 to 76°F on May 31, and lows from 47°F to 56°F. Normal precipitation for the month is 5.09 in over about 14 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 Marion 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
52°F
Precipitation
5.09 in
Record high
92°FMay 25, 2020
Record low
22°FMay 10, 1947
Chance of a freeze
23%
Daylight
13 h 53 min to 14 h 46 min
Cloud cover
69%
Humidity
79%
Dew point
53°F
Wind
4.3 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°F47°F91°F 194231°F 194347%0%
May 271°F48°F86°F 194428°F 194347%0%
May 371°F48°F88°F 194232°F 202647%0%
May 471°F48°F88°F 194431°F 200448%0%
May 571°F49°F84°F 194128°F 194048%0%
May 672°F49°F89°F 194135°F 202148%0%
May 772°F49°F87°F 194032°F 202048%0%
May 872°F49°F88°F 201527°F 194747%0%
May 972°F50°F88°F 194029°F 194747%0%
May 1072°F50°F89°F 201522°F 194747%0%
May 1173°F50°F88°F 194828°F 194147%0%
May 1273°F51°F88°F 201831°F 194147%0%
May 1373°F51°F88°F 201430°F 194147%0%
May 1473°F51°F87°F 201831°F 201347%0%
May 1573°F51°F90°F 201834°F 202647%0%
May 1673°F52°F86°F 194433°F 201647%0%
May 1774°F52°F87°F 194338°F 194246%0%
May 1874°F52°F89°F 202633°F 200946%0%
May 1974°F52°F89°F 202632°F 200946%0%
May 2074°F53°F91°F 194031°F 200246%0%
May 2174°F53°F88°F 194134°F 200245%0%
May 2274°F53°F90°F 194129°F 200245%0%
May 2375°F54°F88°F 200932°F 200645%0%
May 2475°F54°F88°F 194436°F 194545%0%
May 2575°F54°F92°F 202032°F 201344%0%
May 2675°F54°F91°F 202035°F 201344%0%
May 2775°F55°F91°F 201240°F 201344%0%
May 2876°F55°F90°F 201244°F 199944%0%
May 2976°F55°F90°F 194140°F 200843%0%
May 3076°F56°F92°F 200640°F 194743%0%
May 3176°F56°F92°F 201134°F 194743%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Marion 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 (EDT).

May 1
sunrise 6:22 AM, sunset 8:15 PM
May 31
sunrise 5:56 AM, sunset 8:42 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00462920 (Fairmont), public domain. Records: NOAA GHCN-Daily, station USW00003802, 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.