Currently: 70 °F. Scattered clouds. (Weather station: Reagan National Airport, USA). See more current weatherSeptember 2021 Weather in Washington DC — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
54
57
60
63
66
69
72
75
78
81
84
87
90
Wed, Sep 1
Lo:75
12 am
Hi:79
8
Lo:75
6 am
Hi:82
7
Lo:77
12 pm
Hi:84
14
Lo:68
6 pm
Hi:77
16
Thu, Sep 2
Lo:64
12 am
Hi:70
13
Lo:63
6 am
Hi:75
14
Lo:77
12 pm
Hi:79
12
Lo:68
6 pm
Hi:77
6
Fri, Sep 3
Lo:61
12 am
Hi:66
7
Lo:59
6 am
Hi:73
6
Lo:75
12 pm
Hi:79
7
Lo:68
6 pm
Hi:75
4
Sat, Sep 4
Lo:63
12 am
Hi:68
1
Lo:63
6 am
Hi:73
2
Lo:73
12 pm
Hi:81
7
Lo:70
6 pm
Hi:75
7
Sun, Sep 5
Lo:70
12 am
Hi:70
9
Lo:70
6 am
Hi:75
8
Lo:75
12 pm
Hi:77
7
Lo:73
6 pm
Hi:75
4
Mon, Sep 6
Lo:72
12 am
Hi:73
4
Lo:72
6 am
Hi:82
7
Lo:82
12 pm
Hi:86
12
Lo:72
6 pm
Hi:82
4
Tue, Sep 7
Lo:66
12 am
Hi:72
3
Lo:66
6 am
Hi:81
4
Lo:82
12 pm
Hi:86
12
Lo:73
6 pm
Hi:79
10
Wed, Sep 8
Lo:68
12 am
Hi:72
8
Lo:70
6 am
Hi:81
11
Lo:82
12 pm
Hi:88
13
Lo:77
6 pm
Hi:81
12
Thu, Sep 9
Lo:70
12 am
Hi:73
7
Lo:70
6 am
Hi:73
7
Lo:73
12 pm
Hi:79
7
Lo:70
6 pm
Hi:75
4
Fri, Sep 10
Lo:64
12 am
Hi:68
11
Lo:63
6 am
Hi:73
14
Lo:75
12 pm
Hi:77
12
Lo:66
6 pm
Hi:73
3
Sat, Sep 11
Lo:63
12 am
Hi:66
0
Lo:61
6 am
Hi:75
4
Lo:75
12 pm
Hi:79
11
Lo:70
6 pm
Hi:75
10
Sun, Sep 12
Lo:64
12 am
Hi:70
7
Lo:64
6 am
Hi:77
9
Lo:81
12 pm
Hi:84
13
Lo:75
6 pm
Hi:79
9
Mon, Sep 13
Lo:72
12 am
Hi:75
5
Lo:72
6 am
Hi:88
7
Lo:88
12 pm
Hi:90
11
Lo:75
6 pm
Hi:86
2
Tue, Sep 14
Lo:73
12 am
Hi:75
1
Lo:73
6 am
Hi:88
1
Lo:86
12 pm
Hi:90
9
Lo:79
6 pm
Hi:82
9
Wed, Sep 15
Lo:73
12 am
Hi:75
8
Lo:73
6 am
Hi:84
10
Lo:84
12 pm
Hi:90
15
Lo:79
6 pm
Hi:82
7
Thu, Sep 16
Lo:73
12 am
Hi:79
6
Lo:73
6 am
Hi:81
8
Lo:73
12 pm
Hi:84
7
Lo:73
6 pm
Hi:73
7
Fri, Sep 17
Lo:73
12 am
Hi:73
9
Lo:73
6 am
Hi:79
9
Lo:77
12 pm
Hi:81
7
Lo:72
6 pm
Hi:79
6
Sat, Sep 18
Lo:72
12 am
Hi:72
2
Lo:72
6 am
Hi:81
3
Lo:79
12 pm
Hi:84
7
Lo:73
6 pm
Hi:79
3
Sun, Sep 19
Lo:72
12 am
Hi:75
4
Lo:72
6 am
Hi:79
11
Lo:81
12 pm
Hi:82
7
Lo:70
6 pm
Hi:81
4
Mon, Sep 20
Lo:64
12 am
Hi:70
5
Lo:64
6 am
Hi:77
6
Lo:77
12 pm
Hi:81
9
Lo:68
6 pm
Hi:75
7
Tue, Sep 21
Lo:64
12 am
Hi:68
6
Lo:64
6 am
Hi:79
7
Lo:79
12 pm
Hi:81
11
Lo:73
6 pm
Hi:79
6
Wed, Sep 22
Lo:72
12 am
Hi:73
3
Lo:73
6 am
Hi:79
11
Lo:72
12 pm
Hi:81
15
Lo:73
6 pm
Hi:75
12
Thu, Sep 23
Lo:75
12 am
Hi:75
16
Lo:63
6 am
Hi:66
9
Lo:72
12 pm
Hi:75
7
Lo:63
6 pm
Hi:70
10
Fri, Sep 24
Lo:55
12 am
Hi:63
4
Lo:55
6 am
Hi:72
6
Lo:72
12 pm
Hi:75
11
Lo:63
6 pm
Hi:70
2
Sat, Sep 25
Lo:57
12 am
Hi:61
1
Lo:57
6 am
Hi:75
2
Lo:73
12 pm
Hi:75
7
Lo:64
6 pm
Hi:72
6
Sun, Sep 26
Lo:61
12 am
Hi:66
11
Lo:61
6 am
Hi:72
7
Lo:73
12 pm
Hi:77
14
Lo:63
6 pm
Hi:72
6
Mon, Sep 27
Lo:57
12 am
Hi:61
4
Lo:59
6 am
Hi:73
6
Lo:75
12 pm
Hi:79
13
Lo:70
6 pm
Hi:73
10
Tue, Sep 28
Lo:63
12 am
Hi:70
4
Lo:64
6 am
Hi:82
7
Lo:79
12 pm
Hi:81
9
Lo:72
6 pm
Hi:79
7
Wed, Sep 29
Lo:63
12 am
Hi:70
12
Lo:61
6 am
Hi:68
11
Lo:72
12 pm
Hi:73
6
Lo:59
6 pm
Hi:70
3
Thu, Sep 30
Lo:55
12 am
Hi:59
2
Lo:55
6 am
Hi:72
7
Lo:73
12 pm
Hi:75
11
Lo:63
6 pm
Hi:70
6
Wednesday, September 1, 2021, 12:00 am — 6:00 am
79 / 75 °F
Overcast.
Humidity: 84%
Barometer: 29.75 "Hg
NE
Wind: 8.078 mph
High & Low Weather Summary for September 2021
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 90 °F (Sep 15, 2:52 pm) | 93% (Sep 18, 3:59 am) | 30.31 "Hg (Sep 18, 3:59 am) |
| Low | 56 °F (Sep 24, 5:52 am) | 30% (Sep 26, 2:52 pm) | 29.48 "Hg (Sep 1, 5:52 pm) |
| Average | 73 °F | 68% | 30.01 "Hg |
| * Reported Sep 1 12:52 am — Sep 30 11:52 pm, Washington DC. 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
Washington DC Weather History for September 1, 2021
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 12:52 am Wed, Sep 1 |  | 78 °F | Mostly cloudy. | 3 mph | ↑ | 82% | 29.78 "Hg | 10 mi |
| 1:52 am |  | 78 °F | Light rain. Overcast. | 6 mph | ↑ | 79% | 29.77 "Hg | 10 mi |
| 2:21 am |  | 77 °F | Thunderstorms. Mostly cloudy. | 9 mph | ↑ | 85% | 29.75 "Hg | 10 mi |
| 2:52 am | | 78 °F | Thunderstorms. Mostly cloudy. | 12 mph | ↑ | 84% | 29.72 "Hg | 10 mi |
| 3:52 am | | 75 °F | Thunderstorms. Overcast. | 14 mph | ↑ | 88% | 29.74 "Hg | 7 mi |
| 4:25 am | | 76 °F | Mostly cloudy. | 9 mph | ↑ | 85% | 29.74 "Hg | 10 mi |
| 4:52 am | | 76 °F | Mostly cloudy. | 8 mph | ↑ | 85% | 29.73 "Hg | 10 mi |
| 5:52 am | | 75 °F | Overcast. | 6 mph | ↑ | 88% | 29.72 "Hg | 10 mi |
| 6:52 am |  | 75 °F | Cloudy. | 3 mph | ↑ | 88% | 29.72 "Hg | 10 mi |
| 7:52 am |  | 76 °F | Mostly cloudy. | No wind | ↑ | 88% | 29.71 "Hg | 10 mi |
| 8:23 am | | 78 °F | Cloudy. | 7 mph | ↑ | 84% | 29.71 "Hg | 10 mi |
| 8:52 am | | 79 °F | Mostly cloudy. | 8 mph | ↑ | 82% | 29.70 "Hg | 10 mi |
| 9:52 am | | 79 °F | Cloudy. | 10 mph | ↑ | 79% | 29.69 "Hg | 10 mi |
| 10:52 am | | 81 °F | Cloudy. | 8 mph | ↑ | 77% | 29.66 "Hg | 10 mi |
| 11:52 am | | 82 °F | Cloudy. | 13 mph | ↑ | 74% | 29.63 "Hg | 10 mi |
| 12:15 pm | | 83 °F | Mostly cloudy. | 17 mph | ↑ | 72% | 29.62 "Hg | 10 mi |
| 12:52 pm | | 84 °F | Cloudy. | 20 mph | ↑ | 67% | 29.58 "Hg | 10 mi |
| 1:21 pm |  | 83 °F | Light rain. Cloudy. | 18 mph | ↑ | 70% | 29.57 "Hg | 4 mi |
| 1:36 pm |  | 79 °F | Heavy rain. Mostly cloudy. | 9 mph | ↑ | 84% | 29.57 "Hg | 1 mi |
| 2:02 pm | | 80 °F | Light rain. Cloudy. | 16 mph | ↑ | 81% | 29.56 "Hg | 6 mi |
| 3:09 pm | | 78 °F | Heavy rain. Fog. | 16 mph | ↑ | 87% | 29.54 "Hg | 1 mi |
| 3:18 pm | | 77 °F | Heavy rain. Fog. | 8 mph | ↑ | 90% | 29.52 "Hg | 2 mi |
| 3:52 pm | | 79 °F | Broken clouds. | 9 mph | ↑ | 88% | 29.52 "Hg | 10 mi |
| 4:52 pm | | 82 °F | Broken clouds. | 13 mph | ↑ | 79% | 29.50 "Hg | 10 mi |
| 5:05 pm | | 82 °F | Light rain. Broken clouds. | 10 mph | ↑ | 79% | 29.50 "Hg | 10 mi |
| 5:52 pm | | 80 °F | More clouds than sun. | 12 mph | ↑ | 81% | 29.48 "Hg | 10 mi |
| 6:21 pm | | 77 °F | Thunderstorms. Fog. | 14 mph | ↑ | 88% | 29.50 "Hg | 2 mi |
| 6:28 pm | | 77 °F | Thundershowers. Fog. | 10 mph | ↑ | 88% | 29.50 "Hg | 4 mi |
| 6:52 pm | | 76 °F | Light rain. More clouds than sun. | 10 mph | ↑ | 88% | 29.50 "Hg | 10 mi |
| 7:13 pm | | 74 °F | Mostly cloudy. | 14 mph | ↑ | 88% | 29.52 "Hg | 10 mi |
| 7:41 pm | | 72 °F | Mostly cloudy. | 15 mph | ↑ | 81% | 29.55 "Hg | 10 mi |
| 7:52 pm | | 71 °F | Overcast. | 14 mph | ↑ | 84% | 29.54 "Hg | 10 mi |
| 8:52 pm | | 69 °F | Overcast. | 17 mph | ↑ | 84% | 29.59 "Hg | 7 mi |
| 9:52 pm | | 68 °F | Light rain. Overcast. | 18 mph | ↑ | 87% | 29.64 "Hg | 10 mi |
| 10:52 pm | | 68 °F | Overcast. | 25 mph | ↑ | 84% | 29.67 "Hg | 10 mi |
| 11:52 pm | | 68 °F | Overcast. | 16 mph | ↑ | 78% | 29.70 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||