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History for Washington, DC
Friday, July 31, 2009
Daily Summary |
| | Actual | Average | Record |
| Temperature |
| Mean Temperature |
81 °F
|
79 °F
|
|
| Max Temperature |
90 °F
|
88 °F
|
103 °F
(1954) |
| Min Temperature |
71 °F
|
70 °F
|
52 °F
(1895) |
| Degree Days |
| Heating Degree Days |
0 |
0 |
|
| Month to date heating degree days |
0 |
0 |
|
| Since 1 June heating degree days |
5 |
5 |
|
| Since 1 July heating degree days |
0 |
0 |
|
| Cooling Degree Days |
16 |
15 |
|
| Month to date cooling degree days |
378 |
456 |
|
| Year to date cooling degree days |
780 |
892 |
|
| Since 1 June cooling degree days |
650 |
760 |
|
| Growing Degree Days | 30 (Base 50) |
|
|
| Moisture |
| Dew Point |
69 °F
|
|
|
| Average Humidity |
71 |
|
|
| Maximum Humidity |
87 |
|
|
| Minimum Humidity |
55 |
|
|
| Precipitation |
| Precipitation |
0.13 in
|
0.11 in
|
3.18 in
(1899) |
| Month to date precipitation |
1.07 |
3.66 |
|
| Year to date precipitation |
24.20 |
22.82 |
|
| Snow |
| Snow |
0.00 in
|
0.00 in
|
-
() |
| Month to date snowfall |
0.0 |
0.0 |
|
| Since 1 July snowfall |
0.0 |
0.0 |
|
| Snow Depth |
0.00 in
|
|
|
| Sea Level Pressure |
| Sea Level Pressure |
29.89 in
|
|
|
| Wind |
| Wind Speed |
10 mph
(SW) |
|
|
| Max Wind Speed |
29 mph
|
|
|
| Max Gust Speed |
38 mph
|
|
|
| Visibility |
9 miles
|
|
|
| Events |
Rain
|
|
|
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
| Time(EDT) | Temperature | Dew Point | Humidity | Sea Level Pressure | Visibility | Wind Direction | Wind Speed | Gust Speed | Precipitation | Events | Conditions |
|---|
| 12:52 AM |
79.0 °F
|
71.1 °F
|
77% |
29.92 in
|
9.0 miles
|
South |
9.2 mph
|
-
|
N/A |
|
Overcast |
| 1:52 AM |
78.1 °F
|
71.1 °F
|
79% |
29.91 in
|
10.0 miles
|
South |
10.4 mph
|
-
|
0.00 in
|
Rain
|
Light Rain |
| 2:52 AM |
77.0 °F
|
70.0 °F
|
79% |
29.88 in
|
10.0 miles
|
SSW |
9.2 mph
|
-
|
0.00 in
|
|
Mostly Cloudy |
| 3:52 AM |
75.9 °F
|
70.0 °F
|
82% |
29.88 in
|
10.0 miles
|
South |
10.4 mph
|
-
|
N/A |
|
Scattered Clouds |
| 4:43 AM |
75.2 °F
|
71.6 °F
|
89% |
29.88 in
|
9.0 miles
|
SSW |
9.2 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 4:52 AM |
75.9 °F
|
71.1 °F
|
85% |
29.87 in
|
9.0 miles
|
South |
10.4 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 5:52 AM |
75.9 °F
|
72.0 °F
|
87% |
29.88 in
|
10.0 miles
|
South |
11.5 mph
|
-
|
N/A |
|
Overcast |
| 6:52 AM |
75.9 °F
|
71.1 °F
|
85% |
29.89 in
|
9.0 miles
|
SW |
9.2 mph
|
-
|
N/A |
|
Overcast |
| 7:25 AM |
77.0 °F
|
71.6 °F
|
83% |
29.89 in
|
9.0 miles
|
SW |
10.4 mph
|
-
|
N/A |
|
Overcast |
| 7:52 AM |
77.0 °F
|
70.0 °F
|
79% |
29.90 in
|
9.0 miles
|
SW |
9.2 mph
|
-
|
N/A |
|
Overcast |
| 8:17 AM |
78.8 °F
|
71.6 °F
|
78% |
29.88 in
|
10.0 miles
|
South |
5.8 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 8:49 AM |
78.8 °F
|
71.6 °F
|
78% |
29.90 in
|
10.0 miles
|
SSW |
12.7 mph
|
-
|
N/A |
|
Overcast |
| 8:52 AM |
78.1 °F
|
71.1 °F
|
79% |
29.90 in
|
9.0 miles
|
SSW |
12.7 mph
|
-
|
N/A |
|
Overcast |
| 9:40 AM |
80.6 °F
|
71.6 °F
|
74% |
29.89 in
|
10.0 miles
|
SSW |
12.7 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 9:52 AM |
82.0 °F
|
71.1 °F
|
69% |
29.89 in
|
10.0 miles
|
SSW |
11.5 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 10:52 AM |
84.9 °F
|
72.0 °F
|
65% |
29.88 in
|
10.0 miles
|
South |
13.8 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 11:52 AM |
86.0 °F
|
72.0 °F
|
63% |
29.88 in
|
10.0 miles
|
South |
16.1 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 12:52 PM |
89.1 °F
|
71.1 °F
|
55% |
29.84 in
|
10.0 miles
|
South |
15.0 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 1:52 PM |
88.0 °F
|
70.0 °F
|
55% |
29.82 in
|
10.0 miles
|
South |
16.1 mph
|
-
|
N/A |
|
Overcast |
| 2:52 PM |
88.0 °F
|
70.0 °F
|
55% |
29.82 in
|
9.0 miles
|
SW |
21.9 mph
|
33.4 mph
|
0.00 in
|
|
Mostly Cloudy |
| 3:04 PM |
86.0 °F
|
71.6 °F
|
62% |
29.83 in
|
9.0 miles
|
SW |
24.2 mph
|
32.2 mph
|
0.00 in
|
Rain
|
Light Rain |
| 3:11 PM |
86.0 °F
|
69.8 °F
|
58% |
29.85 in
|
9.0 miles
|
WSW |
21.9 mph
|
34.5 mph
|
0.00 in
|
|
Overcast |
| 3:20 PM |
73.4 °F
|
66.2 °F
|
78% |
29.87 in
|
4.0 miles
|
NNW |
24.2 mph
|
38.0 mph
|
0.00 in
|
Rain
|
Rain |
| 3:24 PM |
71.6 °F
|
66.2 °F
|
83% |
29.87 in
|
1.8 miles
|
NW |
18.4 mph
|
33.4 mph
|
0.03 in
|
Rain
|
Rain |
| 3:28 PM |
71.6 °F
|
66.2 °F
|
83% |
29.86 in
|
7.0 miles
|
NNW |
13.8 mph
|
32.2 mph
|
0.10 in
|
Rain
|
Light Rain |
| 3:46 PM |
71.6 °F
|
66.2 °F
|
83% |
29.87 in
|
2.5 miles
|
WNW |
6.9 mph
|
-
|
0.10 in
|
Rain
|
Light Rain |
| 3:52 PM |
71.1 °F
|
66.9 °F
|
87% |
29.87 in
|
5.0 miles
|
NW |
9.2 mph
|
-
|
0.12 in
|
Rain
|
Rain |
| 3:59 PM |
71.6 °F
|
66.2 °F
|
83% |
29.87 in
|
7.0 miles
|
NW |
12.7 mph
|
20.7 mph
|
0.01 in
|
Rain
|
Light Rain |
| 4:11 PM |
71.6 °F
|
66.2 °F
|
83% |
29.87 in
|
10.0 miles
|
NW |
11.5 mph
|
-
|
0.01 in
|
|
Overcast |
| 4:52 PM |
73.0 °F
|
66.0 °F
|
79% |
29.88 in
|
10.0 miles
|
NW |
11.5 mph
|
20.7 mph
|
0.01 in
|
|
Overcast |
| 5:52 PM |
75.0 °F
|
66.0 °F
|
73% |
29.90 in
|
10.0 miles
|
NW |
10.4 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 6:52 PM |
75.0 °F
|
66.0 °F
|
73% |
29.93 in
|
10.0 miles
|
NW |
6.9 mph
|
-
|
N/A |
|
Overcast |
| 7:52 PM |
75.0 °F
|
66.0 °F
|
73% |
29.95 in
|
10.0 miles
|
NNW |
8.1 mph
|
-
|
N/A |
|
Overcast |
| 8:52 PM |
75.0 °F
|
64.9 °F
|
71% |
29.98 in
|
10.0 miles
|
NW |
5.8 mph
|
-
|
N/A |
|
Overcast |
| 9:52 PM |
75.0 °F
|
64.9 °F
|
71% |
30.01 in
|
10.0 miles
|
NW |
4.6 mph
|
-
|
N/A |
|
Overcast |
| 10:52 PM |
73.9 °F
|
66.0 °F
|
76% |
30.04 in
|
10.0 miles
|
Calm |
Calm |
-
|
N/A |
|
Mostly Cloudy |
| 11:52 PM |
73.0 °F
|
66.9 °F
|
81% |
30.04 in
|
10.0 miles
|
SSW |
4.6 mph
|
-
|
N/A |
|
Mostly Cloudy |
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