Weather History for Washington, DC
| Actual | Average | Record | |
|---|---|---|---|
| Temperature | |||
| Mean Temperature | 34 °C | 27 °C | |
| Max Temperature | 41 °C | 32 °C | 40 °C (2012) |
| Min Temperature | 28 °C | 22 °C | 13 °C (1906) |
| Degree Days | |||
| Heating Degree Days | 0 | 0 | |
| Month to date heating degree days | 0 | 0 | |
| Since 1 June heating degree days | 0 | 6 | |
| Since 1 July heating degree days | 0 | 0 | |
| Cooling Degree Days | 29 | 15 | |
| Month to date cooling degree days | 169 | 100 | |
| Year to date cooling degree days | 774 | 548 | |
| Since 1 June cooling degree days | 515 | 414 | |
| Growing Degree Days | 44 (Base 50) | ||
| Moisture | |||
| Dew Point | 21 °C | ||
| Average Humidity | 47 | ||
| Maximum Humidity | 74 | ||
| Minimum Humidity | 19 | ||
| Precipitation | |||
| Precipitation | 0.00 mm | 3.05 mm | 2.36 mm (1958) |
| Month to date precipitation | 0.02 | 0.87 | |
| Year to date precipitation | 13.14 | 20.61 | |
| Snow | |||
| Snow | 0.00 cm | 0.00 cm | - () |
| Month to date snowfall | 0.0 | 0.0 | |
| Since 1 July snowfall | 0.0 | 0.0 | |
| Snow Depth | 0.00 cm | ||
| Sea Level Pressure | |||
| Sea Level Pressure | 1012 hPa | ||
| Wind | |||
| Wind Speed | 11 km/h (SW) | ||
| Max Wind Speed | 27 km/h | ||
| Max Gust Speed | 35 km/h | ||
| Visibility | 15 kilometers | ||
| Events | |||
| T = Trace of Precipitation, MM = Missing Value | Source: NWS Daily Summary |
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Astronomy
| Jul. 07, 2012 | Rise | Set |
|---|---|---|
| Actual Time | 5:50 AM EDT | 8:35 PM EDT |
| Civil Twilight | 5:18 AM EDT | 9:07 PM EDT |
| Nautical Twilight | 4:38 AM EDT | 9:46 PM EDT |
| Astronomical Twilight | 3:53 AM EDT | 10:31 PM EDT |
| Moon | 10:57 PM EDT (7/7) | 10:09 AM EDT (7/7) |
| Length of Visible Light | 15h 48m | |
| Length of Day |
14h 45m
|
|
| Waning Gibbous, 82% of the Moon is Illuminated | ||||
| Jul 7 Waning Gibbous | Jul 10 Last Quarter | Jul 19 New | Jul 26 First Quarter | Aug 1 Full |
Hourly Weather History & Observations
| Time (EDT) | Temp. | Heat Index | Dew Point | Humidity | Pressure | Visibility | Wind Dir | Wind Speed | Gust Speed | Precip | Events | Conditions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12:52 AM | 30.0 °C | 34.3 °C | 23.3 °C | 67% | 1013.1 hPa | 16.1 km | South | 9.3 km/h / 2.6 m/s | - | N/A | Scattered Clouds | |
| 1:52 AM | 29.4 °C | 34.0 °C | 23.9 °C | 72% | 1013.4 hPa | 16.1 km | South | 7.4 km/h / 2.1 m/s | - | N/A | Scattered Clouds | |
| 2:22 AM | 29.0 °C | 32.7 °C | 23.0 °C | 70% | 1013.1 hPa | 16.1 km | South | 11.1 km/h / 3.1 m/s | - | N/A | Scattered Clouds | |
| 2:52 AM | 28.9 °C | 32.9 °C | 23.3 °C | 72% | 1013.0 hPa | 16.1 km | SSW | 11.1 km/h / 3.1 m/s | - | N/A | Clear | |
| 3:52 AM | 28.3 °C | 31.9 °C | 23.3 °C | 74% | 1012.7 hPa | 16.1 km | SSW | 9.3 km/h / 2.6 m/s | - | N/A | Partly Cloudy | |
| 4:52 AM | 27.8 °C | 31.1 °C | 23.3 °C | 76% | 1012.8 hPa | 16.1 km | SSW | 11.1 km/h / 3.1 m/s | - | N/A | Mostly Cloudy | |
| 5:52 AM | 27.8 °C | 30.8 °C | 22.8 °C | 74% | 1012.8 hPa | 12.9 km | SSW | 13.0 km/h / 3.6 m/s | - | N/A | Mostly Cloudy | |
| 6:52 AM | 28.0 °C | 31.2 °C | 23.0 °C | 74% | 1013.1 hPa | 12.9 km | SSW | 7.4 km/h / 2.1 m/s | - | N/A | Scattered Clouds | |
| 7:52 AM | 30.0 °C | 33.9 °C | 22.8 °C | 65% | 1013.3 hPa | 11.3 km | South | 7.4 km/h / 2.1 m/s | - | N/A | Mostly Cloudy | |
| 8:52 AM | 31.7 °C | 37.3 °C | 23.9 °C | 63% | 1012.9 hPa | 11.3 km | South | 13.0 km/h / 3.6 m/s | - | N/A | Mostly Cloudy | |
| 9:52 AM | 33.3 °C | 39.6 °C | 23.9 °C | 58% | 1012.7 hPa | 12.9 km | South | 11.1 km/h / 3.1 m/s | - | N/A | Scattered Clouds | |
| 10:52 AM | 37.2 °C | 40.1 °C | 20.0 °C | 36% | 1012.7 hPa | 16.1 km | West | 14.8 km/h / 4.1 m/s | - | N/A | Clear | |
| 11:37 AM | 38.0 °C | 43.0 °C | 22.0 °C | 39% | 1012.8 hPa | 16.1 km | Variable | 9.3 km/h / 2.6 m/s | - | N/A | Scattered Clouds | |
| 11:52 AM | 37.8 °C | 42.1 °C | 21.1 °C | 38% | 1012.6 hPa | 16.1 km | WNW | 13.0 km/h / 3.6 m/s | - | N/A | Scattered Clouds | |
| 12:52 PM | 38.9 °C | 41.8 °C | 19.4 °C | 32% | 1012.5 hPa | 16.1 km | NW | 24.1 km/h / 6.7 m/s | 29.6 km/h / 8.2 m/s | N/A | Mostly Cloudy | |
| 1:52 PM | 39.4 °C | 42.0 °C | 18.9 °C | 30% | 1012.0 hPa | 16.1 km | NNW | 16.7 km/h / 4.6 m/s | 27.8 km/h / 7.7 m/s | N/A | Overcast | |
| 2:52 PM | 39.4 °C | 41.2 °C | 17.8 °C | 28% | 1011.2 hPa | 16.1 km | West | 9.3 km/h / 2.6 m/s | - | N/A | Overcast | |
| 3:52 PM | 39.4 °C | 39.8 °C | 15.6 °C | 24% | 1010.7 hPa | 16.1 km | Variable | 9.3 km/h / 2.6 m/s | - | N/A | Mostly Cloudy | |
| 4:52 PM | 40.6 °C | 40.2 °C | 13.3 °C | 20% | 1010.2 hPa | 16.1 km | West | 11.1 km/h / 3.1 m/s | 27.8 km/h / 7.7 m/s | N/A | Mostly Cloudy | |
| 5:52 PM | 38.9 °C | 39.3 °C | 15.6 °C | 25% | 1010.4 hPa | 16.1 km | NW | 9.3 km/h / 2.6 m/s | - | N/A | Mostly Cloudy | |
| 6:52 PM | 38.3 °C | 39.3 °C | 16.7 °C | 28% | 1010.3 hPa | 16.1 km | WSW | 5.6 km/h / 1.5 m/s | - | N/A | Mostly Cloudy | |
| 7:52 PM | 37.2 °C | 38.7 °C | 17.8 °C | 32% | 1010.5 hPa | 16.1 km | SW | 9.3 km/h / 2.6 m/s | - | N/A | Mostly Cloudy | |
| 8:52 PM | 35.6 °C | 37.4 °C | 18.9 °C | 37% | 1010.5 hPa | 16.1 km | SSW | 11.1 km/h / 3.1 m/s | - | N/A | Mostly Cloudy | |
| 9:52 PM | 35.0 °C | 36.4 °C | 18.3 °C | 37% | 1010.6 hPa | 16.1 km | SSW | 13.0 km/h / 3.6 m/s | - | N/A | Mostly Cloudy | |
| 10:39 PM | 33.0 °C | 37.8 °C | 23.0 °C | 55% | 1010.7 hPa | 16.1 km | South | 11.1 km/h / 3.1 m/s | - | N/A | Mostly Cloudy | |
| 10:52 PM | 32.8 °C | 38.7 °C | 23.9 °C | 59% | 1010.7 hPa | 16.1 km | SSW | 13.0 km/h / 3.6 m/s | - | N/A | Mostly Cloudy | |
| 11:52 PM | 32.8 °C | 37.4 °C | 22.8 °C | 55% | 1010.6 hPa | 16.1 km | SW | 11.1 km/h / 3.1 m/s | - | N/A | Mostly Cloudy |