September 2018 Weather in Mount Rushmore National Memorial — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
35
40
45
50
55
60
65
70
75
80
85
90
95
Sat, Sep 1
Lo:55
12 am
Hi:66
8
Lo:55
6 am
Hi:77
11
Lo:77
12 pm
Hi:86
16
Lo:66
6 pm
Hi:84
10
Sun, Sep 2
Lo:59
12 am
Hi:68
16
Lo:57
6 am
Hi:70
12
Lo:70
12 pm
Hi:77
8
Lo:57
6 pm
Hi:75
6
Mon, Sep 3
Lo:54
12 am
Hi:61
7
Lo:57
6 am
Hi:81
14
Lo:81
12 pm
Hi:86
19
Lo:70
6 pm
Hi:81
11
Tue, Sep 4
Lo:64
12 am
Hi:72
10
Lo:57
6 am
Hi:64
26
Lo:57
12 pm
Hi:64
19
Lo:61
6 pm
Hi:64
7
Wed, Sep 5
Lo:55
12 am
Hi:61
3
Lo:55
6 am
Hi:66
7
Lo:66
12 pm
Hi:73
14
Lo:57
6 pm
Hi:72
12
Thu, Sep 6
Lo:55
12 am
Hi:59
15
Lo:59
6 am
Hi:77
19
Lo:77
12 pm
Hi:84
21
Lo:66
6 pm
Hi:77
14
Fri, Sep 7
Lo:55
12 am
Hi:66
5
Lo:55
6 am
Hi:82
4
Lo:81
12 pm
Hi:88
14
Lo:64
6 pm
Hi:81
11
Sat, Sep 8
Lo:57
12 am
Hi:64
11
Lo:55
6 am
Hi:79
16
Lo:79
12 pm
Hi:84
22
Lo:66
6 pm
Hi:79
12
Sun, Sep 9
Lo:57
12 am
Hi:66
4
Lo:57
6 am
Hi:82
5
Lo:75
12 pm
Hi:86
4
Lo:64
6 pm
Hi:75
11
Mon, Sep 10
Lo:57
12 am
Hi:68
11
Lo:54
6 am
Hi:77
7
Lo:77
12 pm
Hi:84
12
Lo:64
6 pm
Hi:82
10
Tue, Sep 11
Lo:64
12 am
Hi:66
10
Lo:64
6 am
Hi:73
16
Lo:73
12 pm
Hi:81
15
Lo:61
6 pm
Hi:79
6
Wed, Sep 12
Lo:54
12 am
Hi:61
2
Lo:52
6 am
Hi:73
4
Lo:73
12 pm
Hi:93
12
Lo:72
6 pm
Hi:91
11
Thu, Sep 13
Lo:59
12 am
Hi:73
19
Lo:57
6 am
Hi:70
13
Lo:70
12 pm
Hi:77
7
Lo:63
6 pm
Hi:73
5
Fri, Sep 14
Lo:59
12 am
Hi:63
4
Lo:59
6 am
Hi:68
4
Lo:68
12 pm
Hi:77
9
Lo:59
6 pm
Hi:70
6
Sat, Sep 15
Lo:59
12 am
Hi:61
2
Lo:59
6 am
Hi:61
5
12 pm
N/A
0
Lo:66
6 pm
Hi:70
7
Sun, Sep 16
Lo:66
12 am
Hi:66
14
Lo:66
6 am
Hi:66
14
12 pm
N/A
0
6 pm
N/A
0
Mon, Sep 17
12 am
N/A
0
6 am
N/A
0
12 pm
N/A
0
Lo:50
6 pm
Hi:50
6
Tue, Sep 18
Lo:50
12 am
Hi:50
6
Lo:50
6 am
Hi:66
4
Lo:66
12 pm
Hi:73
9
Lo:57
6 pm
Hi:72
7
Wed, Sep 19
Lo:52
12 am
Hi:59
7
Lo:52
6 am
Hi:54
10
Lo:54
12 pm
Hi:55
10
6 pm
N/A
0
Thu, Sep 20
12 am
N/A
0
Lo:50
6 am
Hi:54
7
Lo:52
12 pm
Hi:61
16
Lo:48
6 pm
Hi:61
16
Fri, Sep 21
Lo:43
12 am
Hi:48
16
Lo:41
6 am
Hi:52
6
Lo:50
12 pm
Hi:50
4
Lo:57
6 pm
Hi:57
14
Sat, Sep 22
Lo:52
12 am
Hi:52
15
Lo:46
6 am
Hi:61
1
Lo:75
12 pm
Hi:81
6
Lo:55
6 pm
Hi:75
2
Sun, Sep 23
Lo:50
12 am
Hi:59
3
Lo:48
6 am
Hi:55
8
Lo:52
12 pm
Hi:55
11
Lo:46
6 pm
Hi:52
14
Mon, Sep 24
Lo:46
12 am
Hi:48
12
Lo:48
6 am
Hi:61
7
Lo:61
12 pm
Hi:64
8
Lo:48
6 pm
Hi:54
17
Tue, Sep 25
Lo:45
12 am
Hi:48
12
Lo:43
6 am
Hi:55
17
Lo:54
12 pm
Hi:57
20
Lo:37
6 pm
Hi:54
9
Wed, Sep 26
Lo:36
12 am
Hi:39
6
Lo:39
6 am
Hi:68
8
Lo:64
12 pm
Hi:70
10
Lo:52
6 pm
Hi:64
10
Thu, Sep 27
Lo:50
12 am
Hi:52
6
Lo:50
6 am
Hi:55
12
Lo:43
12 pm
Hi:50
12
Lo:39
6 pm
Hi:43
11
Fri, Sep 28
Lo:37
12 am
Hi:39
9
Lo:37
6 am
Hi:43
6
Lo:43
12 pm
Hi:46
7
Lo:43
6 pm
Hi:45
12
Sat, Sep 29
Lo:43
12 am
Hi:43
14
Saturday, September 1, 2018, 12:00 am — 6:00 am
66 / 55 °F
Thundershowers. Passing clouds.
Humidity: 67%
Barometer: 29.93 "Hg
NNE
Wind: 8.078 mph
High & Low Weather Summary for September 2018
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 94 °F (Sep 12, 4:56 pm) | 100% (Sep 6, 5:56 am) | 30.40 "Hg (Sep 6, 5:56 am) |
| Low | 36 °F (Sep 26, 1:56 am) | 19% (Sep 7, 3:17 pm) | 29.56 "Hg (Sep 12, 5:56 pm) |
| Average | 60 °F | 71% | 30.00 "Hg |
| * Reported Sep 1 12:56 am — Sep 29 4:56 am, Mount Rushmore National Memorial. Weather by CustomWeather, © 2025 | |||
Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records
Mount Rushmore National Memorial Weather History for September 1, 2018
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 12:56 am Sat, Sep 1 |  | 66 °F | Clear. | 6 mph | ↑ | 39% | 29.93 "Hg | 10 mi |
| 2:05 am |  | 63 °F | Mostly cloudy. | 9 mph | ↑ | 56% | 29.94 "Hg | 10 mi |
| 2:08 am |  | 61 °F | Thunderstorms. Mostly cloudy. | 10 mph | ↑ | 68% | 29.94 "Hg | 10 mi |
| 2:34 am | | 63 °F | Overcast. | 5 mph | ↑ | 49% | 29.92 "Hg | 10 mi |
| 2:56 am | | 62 °F | Thunderstorms. Overcast. | 13 mph | ↑ | 53% | 29.94 "Hg | 10 mi |
| 3:12 am | | 61 °F | Thunderstorms. Low clouds. | 13 mph | ↑ | 63% | 29.90 "Hg | 9 mi |
| 3:28 am | | 59 °F | Thundershowers. Passing clouds. | 8 mph | ↑ | 72% | 29.94 "Hg | 10 mi |
| 3:56 am |  | 56 °F | Passing clouds. | 6 mph | ↑ | 87% | 29.94 "Hg | 10 mi |
| 4:56 am | | 56 °F | Passing clouds. | 3 mph | ↑ | 89% | 29.93 "Hg | 10 mi |
| 5:56 am | | 55 °F | Partly sunny. | 8 mph | ↑ | 90% | 29.93 "Hg | 10 mi |
| 6:56 am |  | 56 °F | Scattered clouds. | 8 mph | ↑ | 70% | 29.93 "Hg | 10 mi |
| 7:56 am |  | 62 °F | Broken clouds. | 3 mph | ↑ | 55% | 29.93 "Hg | 10 mi |
| 8:56 am | | 64 °F | Partly sunny. | 12 mph | ↑ | 52% | 29.95 "Hg | 10 mi |
| 9:56 am | | 68 °F | Passing clouds. | 10 mph | ↑ | 46% | 29.93 "Hg | 10 mi |
| 10:56 am |  | 73 °F | Sunny. | 20 mph | ↑ | 37% | 29.90 "Hg | 10 mi |
| 11:56 am | | 77 °F | Sunny. | 16 mph | ↑ | 36% | 29.87 "Hg | 10 mi |
| 12:56 pm | | 80 °F | Sunny. | 16 mph | ↑ | 33% | 29.83 "Hg | 10 mi |
| 1:27 pm | | 81 °F | Sunny. | 16 mph | ↑ | 34% | 29.83 "Hg | 10 mi |
| 1:56 pm | | 82 °F | Sunny. | 17 mph | ↑ | 33% | 29.82 "Hg | 10 mi |
| 2:56 pm | | 84 °F | Sunny. | 16 mph | ↑ | 32% | 29.78 "Hg | 10 mi |
| 3:56 pm | | 85 °F | Sunny. | 16 mph | ↑ | 31% | 29.76 "Hg | 10 mi |
| 4:56 pm | | 85 °F | Sunny. | 14 mph | ↑ | 27% | 29.74 "Hg | 10 mi |
| 5:56 pm | | 84 °F | Sunny. | 12 mph | ↑ | 32% | 29.74 "Hg | 10 mi |
| 6:56 pm | | 79 °F | Clear. | 3 mph | ↑ | 42% | 29.75 "Hg | 10 mi |
| 7:56 pm | | 72 °F | Clear. | 6 mph | ↑ | 51% | 29.77 "Hg | 10 mi |
| 8:56 pm | | 70 °F | Clear. | 5 mph | ↑ | 50% | 29.78 "Hg | 10 mi |
| 9:56 pm | | 67 °F | Passing clouds. | 6 mph | ↑ | 60% | 29.80 "Hg | 10 mi |
| 10:56 pm | | 68 °F | Passing clouds. | 14 mph | ↑ | 56% | 29.81 "Hg | 10 mi |
| 11:17 pm | | 70 °F | Thunderstorms. Passing clouds. | 10 mph | ↑ | 50% | 29.84 "Hg | 10 mi |
| 11:40 pm | | 68 °F | Passing clouds. | 16 mph | ↑ | 49% | 29.85 "Hg | 10 mi |
| 11:56 pm | | 68 °F | Passing clouds. | 21 mph | ↑ | 48% | 29.85 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||