Sully County climate

Sully County Weather in August

NOAA 1991-2020 normals for Onida 4 Nw, 2.1 km from Sully County

Average highs run from 88°F on August 1 to 82°F on August 31, and lows from 62°F to 55°F. Normal precipitation for the month is 2.51 in over about 7 wet days.

August day by day

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

Normal daily high and low temperature at Sully County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
85°F
Average low
59°F
Precipitation
2.51 in
Record high
112°FAug 6, 1941
Record low
33°FAug 12, 1964
Chance of a freeze
0%
Days of 90°F or more
9.2
Daylight
14 h 39 min to 13 h 17 min
Cloud cover
48%
Humidity
57%
Dew point
56°F
Wind
10.3 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
Aug 188°F62°F109°F 193639°F 192726%0%
Aug 288°F62°F109°F 193845°F 197125%0%
Aug 388°F61°F107°F 194742°F 197825%0%
Aug 487°F61°F108°F 193144°F 197425%0%
Aug 587°F61°F111°F 194146°F 201225%0%
Aug 687°F61°F112°F 194144°F 199325%0%
Aug 787°F61°F106°F 200547°F 198925%0%
Aug 887°F61°F108°F 193643°F 202425%0%
Aug 987°F61°F111°F 194744°F 192724%0%
Aug 1086°F60°F108°F 194742°F 198524%0%
Aug 1186°F60°F106°F 195941°F 197724%0%
Aug 1286°F60°F105°F 192833°F 196424%0%
Aug 1386°F60°F108°F 193844°F 196424%0%
Aug 1486°F60°F112°F 193733°F 192923%0%
Aug 1586°F59°F111°F 193744°F 195923%0%
Aug 1685°F59°F105°F 198844°F 201223%0%
Aug 1785°F59°F107°F 197638°F 194323%0%
Aug 1885°F59°F110°F 195938°F 192723%0%
Aug 1985°F59°F103°F 197438°F 192722%0%
Aug 2085°F58°F108°F 197640°F 195022%0%
Aug 2184°F58°F108°F 197641°F 196422%0%
Aug 2284°F58°F104°F 193739°F 192322%0%
Aug 2384°F58°F109°F 193638°F 192721%0%
Aug 2484°F57°F105°F 192935°F 193421%0%
Aug 2584°F57°F105°F 192635°F 193421%0%
Aug 2683°F57°F105°F 197637°F 193421%0%
Aug 2783°F56°F106°F 197341°F 199221%0%
Aug 2883°F56°F106°F 195934°F 193521%0%
Aug 2983°F56°F107°F 201240°F 198821%0%
Aug 3082°F56°F102°F 196934°F 193521%0%
Aug 3182°F55°F103°F 195338°F 192420%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sully County, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 6:27 AM, sunset 9:06 PM
August 31
sunrise 7:02 AM, sunset 8:19 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00396292 (Onida 4 Nw), public domain. Records: NOAA GHCN-Daily, station USC00396292, 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.