Sullivan County climate

Sullivan County Weather in May

NOAA 1991-2020 normals for Green City 5N, 20.7 km from Sullivan County

Average highs run from 67°F on May 1 to 76°F on May 31, and lows from 43°F to 55°F. Normal precipitation for the month is 5.57 in.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Sullivan County, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
71°F
Average low
49°F
Precipitation
5.57 in
Record high
97°FMay 27, 2018
Record low
29°FMay 3, 2005
Chance of a freeze
35%
Days of 90°F or more
0.7
Daylight
13 h 56 min to 14 h 50 min
Cloud cover
64%
Humidity
77%
Dew point
55°F
Wind
10.1 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 167°F43°F86°F 195231°F 19500%
May 267°F43°F87°F 195230°F 19700%
May 367°F44°F87°F 195229°F 20050%
May 468°F44°F89°F 195229°F 20050%
May 568°F45°F89°F 195233°F 19540%
May 668°F45°F85°F 196535°F 20060%
May 768°F45°F89°F 202334°F 19540%
May 869°F46°F88°F 196333°F 20100%
May 969°F46°F91°F 196331°F 19660%
May 1069°F47°F91°F 201129°F 19660%
May 1170°F47°F89°F 202232°F 20200%
May 1270°F48°F91°F 195632°F 20130%
May 1370°F48°F87°F 196233°F 20130%
May 1471°F48°F88°F 201334°F 20000%
May 1571°F49°F87°F 201732°F 19590%
May 1671°F49°F89°F 196234°F 20140%
May 1772°F50°F91°F 196429°F 20140%
May 1872°F50°F92°F 196434°F 20020%
May 1972°F50°F90°F 196238°F 20020%
May 2073°F51°F89°F 197235°F 19540%
May 2173°F51°F90°F 195636°F 19670%
May 2273°F52°F90°F 195633°F 19630%
May 2374°F52°F88°F 196435°F 19630%
May 2474°F52°F91°F 196741°F 19690%
May 2574°F53°F93°F 196740°F 19710%
May 2675°F53°F94°F 201840°F 19610%
May 2775°F54°F97°F 201836°F 19710%
May 2875°F54°F96°F 201842°F 19650%
May 2976°F54°F93°F 201838°F 19650%
May 3076°F55°F92°F 195340°F 20210%
May 3176°F55°F91°F 195342°F 19660%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sullivan County, in percent, and of at least 0.1 inch of snowfall.00.10.10.20.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

May 1
sunrise 6:12 AM, sunset 8:08 PM
May 31
sunrise 5:45 AM, sunset 8:35 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00233416 (Green City 5N), public domain. Records: NOAA GHCN-Daily, station USW00014938, 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.