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Cactus Flat, SD

64°F
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Cactus Flat

South Dakota

64°
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Cactus Flat, SD Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities

August

January February March April May June July August September October November December

2026

2025 2026 2027

10-Day

S
M
T
W
T
F
S
26
109°
75°
27
104°
71°
28
98°
67°
29
100°
67°
30
86°
68°
31
89°
62°
1
98°
55°
2
109°
67°
3
86°
52°
4
75°
47°
5
90°
48°
6
100°
64°
7
84°
58°
8
98°
53°
9
86°
61°
10
91°
64°
11
92°
64°
12
82°
60°
13
Rain and a thunderstorm
76°
65°
14
A shower and t-storm; humid
86°
64°
15
Mostly cloudy
81°
58°
16
Partly sunny
83°
60°
17
A t-storm around in the p.m.
91°
65°
18
A strong afternoon t-storm
91°
63°
19
A strong morning thunderstorm
85°
62°
20
A strong afternoon t-storm
88°
64°
21
Mainly cloudy
92°
65°
22
A strong afternoon t-storm
92°
62°
23
A little morning rain; cloudy
84°
60°
24
A little morning rain
83°
62°
25
Mostly sunny
84°
61°
26
A thundershower in spots
89°
57°
27
Cloudy, thunderstorms; humid
88°
64°
28
Very warm with clouds and sun
94°
65°
29
Mostly cloudy and very warm
93°
64°
30
Decreasing clouds and warm
94°
65°
31
Warm with decreasing clouds
93°
64°
1
Warm; a little morning rain
91°
63°
2
Warm with decreasing clouds
92°
63°
3
Very warm with clouds and sun
92°
62°
4
Mostly sunny and very warm
93°
63°
5
Mostly cloudy and very warm
92°
63°

Temperature Graph

°F
110° 96° 82° 68° 54° Aug
Today 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

August Weather in Cactus Flat

Cactus Flat's August 2026 forecast shows daily high temperatures ranging from 76° to 94°, with overnight lows between 57° and 65°. The average high for August is 89° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Cactus Flat. See also: September | October | November.

Further Ahead

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World North America United States South Dakota Cactus Flat

Weather Near Cactus Flat:

  • Rapid City, SD
  • Sheridan, WY
  • Spearfish, SD
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