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History for Washington, DC
Monday, August 31, 2009
Daily Summary |
| | Actual | Average | Record |
| Temperature |
| Mean Temperature |
69 °F
|
76 °F
|
|
| Max Temperature |
76 °F
|
84 °F
|
100 °F
(1953) |
| Min Temperature |
62 °F
|
68 °F
|
49 °F
(1934) |
| Degree Days |
| Heating Degree Days |
0 |
0 |
|
| Month to date heating degree days |
0 |
0 |
|
| Since 1 June heating degree days |
5 |
6 |
|
| Since 1 July heating degree days |
0 |
0 |
|
| Cooling Degree Days |
4 |
11 |
|
| Month to date cooling degree days |
467 |
406 |
|
| Year to date cooling degree days |
1247 |
1311 |
|
| Since 1 June cooling degree days |
1117 |
1177 |
|
| Growing Degree Days | 18 (Base 50) |
|
|
| Moisture |
| Dew Point |
51 °F
|
|
|
| Average Humidity |
54 |
|
|
| Maximum Humidity |
63 |
|
|
| Minimum Humidity |
44 |
|
|
| Precipitation |
| Precipitation |
0.00 in
|
0.09 in
|
1.98 in
(1940) |
| Month to date precipitation |
2.46 |
2.93 |
|
| Year to date precipitation |
26.66 |
26.40 |
|
| 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 |
30.15 in
|
|
|
| Wind |
| Wind Speed |
10 mph
(North) |
|
|
| Max Wind Speed |
18 mph
|
|
|
| Max Gust Speed |
22 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 |
71.1 °F
|
50.0 °F
|
47% |
30.08 in
|
10.0 miles
|
North |
15.0 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 1:52 AM |
68.0 °F
|
51.1 °F
|
55% |
30.09 in
|
10.0 miles
|
North |
12.7 mph
|
-
|
N/A |
|
Scattered Clouds |
| 2:52 AM |
66.9 °F
|
50.0 °F
|
54% |
30.08 in
|
10.0 miles
|
NNW |
13.8 mph
|
-
|
N/A |
|
Scattered Clouds |
| 3:52 AM |
66.9 °F
|
50.0 °F
|
54% |
30.09 in
|
10.0 miles
|
North |
11.5 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 4:52 AM |
66.0 °F
|
50.0 °F
|
56% |
30.12 in
|
10.0 miles
|
North |
12.7 mph
|
-
|
N/A |
|
Overcast |
| 5:52 AM |
64.9 °F
|
50.0 °F
|
58% |
30.12 in
|
10.0 miles
|
North |
13.8 mph
|
-
|
N/A |
|
Overcast |
| 6:52 AM |
64.9 °F
|
50.0 °F
|
58% |
30.12 in
|
10.0 miles
|
NNW |
13.8 mph
|
-
|
N/A |
|
Overcast |
| 7:52 AM |
64.0 °F
|
51.1 °F
|
63% |
30.14 in
|
10.0 miles
|
North |
13.8 mph
|
-
|
N/A |
|
Overcast |
| 8:52 AM |
64.0 °F
|
51.1 °F
|
63% |
30.16 in
|
10.0 miles
|
North |
12.7 mph
|
-
|
N/A |
|
Overcast |
| 9:52 AM |
64.9 °F
|
51.1 °F
|
61% |
30.16 in
|
10.0 miles
|
NNE |
11.5 mph
|
-
|
N/A |
|
Overcast |
| 10:52 AM |
66.0 °F
|
52.0 °F
|
60% |
30.19 in
|
10.0 miles
|
NE |
8.1 mph
|
-
|
N/A |
|
Overcast |
| 11:52 AM |
69.1 °F
|
52.0 °F
|
54% |
30.19 in
|
10.0 miles
|
NE |
5.8 mph
|
-
|
N/A |
|
Overcast |
| 12:52 PM |
70.0 °F
|
51.1 °F
|
51% |
30.18 in
|
10.0 miles
|
Calm |
Calm |
-
|
N/A |
|
Mostly Cloudy |
| 1:52 PM |
73.0 °F
|
51.1 °F
|
46% |
30.17 in
|
10.0 miles
|
Calm |
Calm |
-
|
N/A |
|
Mostly Cloudy |
| 2:52 PM |
73.0 °F
|
51.1 °F
|
46% |
30.16 in
|
10.0 miles
|
NE |
3.5 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 3:52 PM |
73.9 °F
|
51.1 °F
|
45% |
30.13 in
|
10.0 miles
|
NW |
3.5 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 4:52 PM |
73.0 °F
|
50.0 °F
|
44% |
30.13 in
|
10.0 miles
|
North |
11.5 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 5:52 PM |
72.0 °F
|
50.0 °F
|
46% |
30.13 in
|
10.0 miles
|
NNW |
12.7 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 6:52 PM |
72.0 °F
|
51.1 °F
|
48% |
30.14 in
|
10.0 miles
|
North |
10.4 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 7:52 PM |
69.1 °F
|
53.1 °F
|
57% |
30.16 in
|
10.0 miles
|
North |
17.3 mph
|
-
|
N/A |
|
Mostly Cloudy |
| 8:52 PM |
66.9 °F
|
51.1 °F
|
57% |
30.19 in
|
10.0 miles
|
North |
13.8 mph
|
-
|
N/A |
|
Scattered Clouds |
| 9:52 PM |
66.0 °F
|
51.1 °F
|
59% |
30.21 in
|
10.0 miles
|
NNE |
10.4 mph
|
-
|
N/A |
|
Partly Cloudy |
| 10:52 PM |
64.9 °F
|
50.0 °F
|
58% |
30.22 in
|
10.0 miles
|
NNE |
8.1 mph
|
-
|
N/A |
|
Partly Cloudy |
| 11:52 PM |
64.0 °F
|
50.0 °F
|
60% |
30.21 in
|
10.0 miles
|
North |
8.1 mph
|
-
|
N/A |
|
Clear |
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