Sioux County climate

Sioux County Weather in August

NOAA 1991-2020 normals for Agate 3 E, 7.3 km from Sioux County

Average highs run from 89°F on August 1 to 85°F on August 31, and lows from 54°F to 47°F. Normal precipitation for the month is 1.60 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 Sioux County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
88°F
Average low
51°F
Precipitation
1.60 in
Record high
105°FAug 2, 2026
Record low
36°FAug 28, 2004
Chance of a freeze
19%
Days of 90°F or more
13.0
Daylight
14 h 28 min to 13 h 12 min
Cloud cover
46%
Humidity
48%
Dew point
49°F
Wind
9.6 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 189°F54°F102°F 202247°F 200925%0%
Aug 289°F54°F105°F 202650°F 200925%0%
Aug 389°F54°F101°F 201652°F 200625%0%
Aug 489°F54°F105°F 202449°F 201725%0%
Aug 589°F54°F104°F 202247°F 202625%0%
Aug 689°F54°F102°F 201252°F 200025%0%
Aug 789°F54°F101°F 202551°F 199825%0%
Aug 889°F53°F99°F 200050°F 202325%0%
Aug 989°F53°F100°F 200651°F 202324%0%
Aug 1089°F53°F101°F 202647°F 200224%0%
Aug 1188°F53°F101°F 202644°F 200424%0%
Aug 1288°F52°F98°F 202243°F 200424%0%
Aug 1388°F52°F104°F 200743°F 200224%0%
Aug 1488°F52°F101°F 202546°F 202323%0%
Aug 1588°F52°F102°F 201547°F 202323%0%
Aug 1688°F51°F102°F 200246°F 200123%0%
Aug 1788°F51°F100°F 202143°F 200223%0%
Aug 1887°F51°F102°F 202346°F 200223%0%
Aug 1987°F51°F99°F 201944°F 201223%0%
Aug 2087°F50°F99°F 201339°F 201822%0%
Aug 2187°F50°F102°F 202344°F 200922%0%
Aug 2287°F50°F103°F 202346°F 201522%0%
Aug 2387°F49°F101°F 200638°F 201522%0%
Aug 2486°F49°F99°F 200044°F 201522%0%
Aug 2586°F49°F102°F 202050°F 201522%0%
Aug 2686°F48°F101°F 201049°F 200521%0%
Aug 2786°F48°F101°F 201045°F 200421%0%
Aug 2886°F48°F100°F 201236°F 200421%0%
Aug 2985°F47°F100°F 201242°F 200421%0%
Aug 3085°F47°F99°F 201546°F 202421%0%
Aug 3185°F47°F97°F 200741°F 200521%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sioux 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 (MDT).

August 1
sunrise 5:47 AM, sunset 8:15 PM
August 31
sunrise 6:19 AM, sunset 7:31 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00250030 (Agate 3 E), public domain. Records: NOAA GHCN-Daily, station USW00094053, 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.