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History for Washington, DC
Tuesday, July 21, 2009
Daily Summary |
| | Actual | Average | Record |
| Temperature |
| Mean Temperature |
79 °F
|
80 °F
|
|
| Max Temperature |
86 °F
|
89 °F
|
104 °F
(1926) |
| Min Temperature |
71 °F
|
71 °F
|
56 °F
(1909) |
| 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 |
14 |
15 |
|
| Month to date cooling degree days |
225 |
306 |
|
| Year to date cooling degree days |
627 |
742 |
|
| Since 1 June cooling degree days |
497 |
610 |
|
| Growing Degree Days | 28 (Base 50) |
|
|
| Moisture |
| Dew Point |
62 °F
|
|
|
| Average Humidity |
58 |
|
|
| Maximum Humidity |
79 |
|
|
| Minimum Humidity |
37 |
|
|
| Precipitation |
| Precipitation |
0.00 in
|
0.12 in
|
2.56 in
(1911) |
| Month to date precipitation |
0.26 |
2.47 |
|
| Year to date precipitation |
23.39 |
21.63 |
|
| 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 |
30.09 in
|
|
|
| Wind |
| Wind Speed |
7 mph
(East) |
|
|
| Max Wind Speed |
14 mph
|
|
|
| Max Gust Speed |
16 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
|
60.1 °F
|
64% |
30.12 in
|
10.0 miles
|
ENE |
8.1 mph
|
-
|
N/A |
|
Overcast |
| 1:52 AM |
72.0 °F
|
60.1 °F
|
66% |
30.11 in
|
10.0 miles
|
ENE |
8.1 mph
|
-
|
N/A |
|
Overcast |
| 2:52 AM |
72.0 °F
|
61.0 °F
|
68% |
30.10 in
|
10.0 miles
|
NE |
6.9 mph
|
-
|
N/A |
|
Overcast |
| 3:52 AM |
72.0 °F
|
61.0 °F
|
68% |
30.10 in
|
10.0 miles
|
ENE |
5.8 mph
|
-
|
N/A |
|
Overcast |
| 4:52 AM |
72.0 °F
|
62.1 °F
|
71% |
30.09 in
|
10.0 miles
|
NNE |
6.9 mph
|
-
|
N/A |
|
Overcast |
| 5:52 AM |
71.1 °F
|
62.1 °F
|
73% |
30.09 in
|
10.0 miles
|
NNE |
6.9 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 6:52 AM |
72.0 °F
|
63.0 °F
|
73% |
30.10 in
|
10.0 miles
|
NNE |
6.9 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 7:52 AM |
72.0 °F
|
63.0 °F
|
73% |
30.11 in
|
10.0 miles
|
North |
8.1 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 8:39 AM |
73.4 °F
|
62.6 °F
|
69% |
30.11 in
|
10.0 miles
|
NNE |
9.2 mph
|
-
|
N/A |
|
Overcast |
| 8:52 AM |
73.0 °F
|
63.0 °F
|
71% |
30.12 in
|
10.0 miles
|
NNE |
6.9 mph
|
-
|
N/A |
|
Overcast |
| 9:30 AM |
75.2 °F
|
64.4 °F
|
69% |
30.11 in
|
10.0 miles
|
ENE |
5.8 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 9:52 AM |
75.9 °F
|
64.0 °F
|
67% |
30.11 in
|
10.0 miles
|
ENE |
4.6 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 10:36 AM |
75.2 °F
|
62.6 °F
|
65% |
30.11 in
|
10.0 miles
|
Calm |
Calm |
-
|
N/A |
|
Mostly Cloudy |
| 10:52 AM |
77.0 °F
|
62.1 °F
|
60% |
30.11 in
|
10.0 miles
|
ENE |
4.6 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 11:52 AM |
79.0 °F
|
62.1 °F
|
56% |
30.10 in
|
10.0 miles
|
ENE |
6.9 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 12:52 PM |
81.0 °F
|
61.0 °F
|
50% |
30.10 in
|
10.0 miles
|
ENE |
4.6 mph
|
-
|
N/A |
|
Scattered Clouds |
| 1:52 PM |
81.0 °F
|
59.0 °F
|
47% |
30.08 in
|
10.0 miles
|
Calm |
Calm |
-
|
N/A |
|
Mostly Cloudy |
| 2:52 PM |
84.0 °F
|
59.0 °F
|
43% |
30.06 in
|
10.0 miles
|
South |
4.6 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 3:52 PM |
84.0 °F
|
55.9 °F
|
38% |
30.05 in
|
10.0 miles
|
South |
6.9 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 4:52 PM |
84.0 °F
|
59.0 °F
|
43% |
30.04 in
|
10.0 miles
|
South |
8.1 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 5:52 PM |
82.0 °F
|
63.0 °F
|
52% |
30.03 in
|
10.0 miles
|
South |
6.9 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 6:52 PM |
82.9 °F
|
63.0 °F
|
51% |
30.04 in
|
10.0 miles
|
South |
10.4 mph
|
-
|
N/A |
|
Scattered Clouds |
| 7:52 PM |
81.0 °F
|
60.1 °F
|
49% |
30.05 in
|
10.0 miles
|
South |
10.4 mph
|
-
|
N/A |
|
Scattered Clouds |
| 8:52 PM |
77.0 °F
|
66.0 °F
|
69% |
30.07 in
|
10.0 miles
|
SE |
10.4 mph
|
-
|
N/A |
|
Scattered Clouds |
| 9:52 PM |
75.9 °F
|
64.9 °F
|
69% |
30.09 in
|
10.0 miles
|
SSE |
5.8 mph
|
-
|
N/A |
|
Scattered Clouds |
| 10:52 PM |
75.0 °F
|
66.0 °F
|
73% |
30.09 in
|
10.0 miles
|
SSE |
5.8 mph
|
-
|
N/A |
|
Partly Cloudy |
| 11:52 PM |
73.9 °F
|
66.0 °F
|
76% |
30.11 in
|
10.0 miles
|
ENE |
3.5 mph
|
-
|
N/A |
|
Partly Cloudy |
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