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History for Washington, DC
Monday, July 20, 2009
Daily Summary |
| | Actual | Average | Record |
| Temperature |
| Mean Temperature |
77 °F
|
80 °F
|
|
| Max Temperature |
84 °F
|
89 °F
|
106 °F
(1930) |
| Min Temperature |
70 °F
|
71 °F
|
53 °F
(1890) |
| 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 |
12 |
15 |
|
| Month to date cooling degree days |
211 |
291 |
|
| Year to date cooling degree days |
613 |
727 |
|
| Since 1 June cooling degree days |
483 |
595 |
|
| Growing Degree Days | 26 (Base 50) |
|
|
| Moisture |
| Dew Point |
61 °F
|
|
|
| Average Humidity |
61 |
|
|
| Maximum Humidity |
79 |
|
|
| Minimum Humidity |
43 |
|
|
| Precipitation |
| Precipitation |
T in
|
0.12 in
|
1.45 in
(1969) |
| Month to date precipitation |
0.26 |
2.35 |
|
| Year to date precipitation |
23.39 |
21.51 |
|
| 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 |
30.12 in
|
|
|
| Wind |
| Wind Speed |
6 mph
(ENE) |
|
|
| Max Wind Speed |
14 mph
|
|
|
| Max Gust Speed |
20 mph
|
|
|
| Visibility |
10 miles
|
|
|
| Events |
|
|
|
|
| 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 |
73.0 °F
|
59.0 °F
|
61% |
30.13 in
|
10.0 miles
|
Calm |
Calm |
-
|
N/A |
|
Mostly Cloudy |
| 1:52 AM |
72.0 °F
|
60.1 °F
|
66% |
30.13 in
|
10.0 miles
|
East |
4.6 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 2:52 AM |
73.0 °F
|
59.0 °F
|
61% |
30.12 in
|
10.0 miles
|
Calm |
Calm |
-
|
N/A |
|
Mostly Cloudy |
| 3:52 AM |
70.0 °F
|
61.0 °F
|
73% |
30.12 in
|
10.0 miles
|
NE |
5.8 mph
|
-
|
N/A |
|
Overcast |
| 4:52 AM |
71.1 °F
|
61.0 °F
|
70% |
30.12 in
|
10.0 miles
|
ENE |
4.6 mph
|
-
|
N/A |
|
Overcast |
| 5:52 AM |
70.0 °F
|
60.1 °F
|
71% |
30.12 in
|
10.0 miles
|
ENE |
5.8 mph
|
-
|
N/A |
|
Overcast |
| 6:52 AM |
70.0 °F
|
63.0 °F
|
78% |
30.12 in
|
9.0 miles
|
NE |
8.1 mph
|
-
|
N/A |
|
Overcast |
| 7:52 AM |
71.1 °F
|
64.0 °F
|
78% |
30.14 in
|
8.0 miles
|
NNE |
5.8 mph
|
-
|
N/A |
|
Overcast |
| 8:52 AM |
73.0 °F
|
64.9 °F
|
76% |
30.14 in
|
8.0 miles
|
NE |
5.8 mph
|
-
|
N/A |
|
Overcast |
| 9:24 AM |
73.4 °F
|
66.2 °F
|
78% |
30.15 in
|
8.0 miles
|
NE |
5.8 mph
|
-
|
N/A |
|
Overcast |
| 9:52 AM |
73.9 °F
|
66.0 °F
|
76% |
30.14 in
|
9.0 miles
|
ENE |
4.6 mph
|
-
|
N/A |
|
Overcast |
| 10:52 AM |
75.9 °F
|
62.1 °F
|
62% |
30.14 in
|
10.0 miles
|
NE |
4.6 mph
|
-
|
N/A |
|
Overcast |
| 11:52 AM |
79.0 °F
|
60.1 °F
|
52% |
30.14 in
|
10.0 miles
|
ENE |
9.2 mph
|
-
|
N/A |
|
Overcast |
| 12:52 PM |
80.1 °F
|
57.9 °F
|
47% |
30.13 in
|
10.0 miles
|
East |
9.2 mph
|
-
|
N/A |
|
Overcast |
| 1:52 PM |
82.0 °F
|
57.0 °F
|
42% |
30.13 in
|
10.0 miles
|
ENE |
8.1 mph
|
-
|
N/A |
|
Overcast |
| 2:52 PM |
82.9 °F
|
59.0 °F
|
44% |
30.11 in
|
10.0 miles
|
East |
11.5 mph
|
-
|
N/A |
|
Overcast |
| 3:52 PM |
81.0 °F
|
59.0 °F
|
47% |
30.10 in
|
10.0 miles
|
SE |
8.1 mph
|
-
|
N/A |
|
Overcast |
| 4:52 PM |
80.1 °F
|
57.9 °F
|
47% |
30.10 in
|
10.0 miles
|
East |
9.2 mph
|
-
|
N/A |
|
Overcast |
| 5:52 PM |
79.0 °F
|
59.0 °F
|
50% |
30.10 in
|
10.0 miles
|
ENE |
11.5 mph
|
-
|
N/A |
|
Overcast |
| 6:52 PM |
77.0 °F
|
57.9 °F
|
52% |
30.10 in
|
10.0 miles
|
East |
6.9 mph
|
-
|
0.00 in
|
|
Overcast |
| 7:52 PM |
75.9 °F
|
59.0 °F
|
56% |
30.11 in
|
10.0 miles
|
ESE |
8.1 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 8:52 PM |
73.0 °F
|
64.0 °F
|
73% |
30.10 in
|
10.0 miles
|
SSE |
4.6 mph
|
-
|
N/A |
|
Overcast |
| 9:52 PM |
73.0 °F
|
64.0 °F
|
73% |
30.12 in
|
10.0 miles
|
Calm |
Calm |
-
|
N/A |
|
Overcast |
| 10:52 PM |
73.9 °F
|
61.0 °F
|
64% |
30.12 in
|
10.0 miles
|
Calm |
Calm |
-
|
N/A |
|
Mostly Cloudy |
| 11:52 PM |
73.0 °F
|
59.0 °F
|
61% |
30.13 in
|
10.0 miles
|
ENE |
5.8 mph
|
-
|
N/A |
|
Overcast |
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