Washington National Airport
The tables below display average monthly climate and weather indicators in Washington National Airport District of Columbia.
Temperature by: Fahrenheit / Centigrade
| Washington National Airport Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Avg. Temperature | 34.6 | 37.5 | 47.2 | 56.5 | 66.4 | 75.6 | 80.0 | 78.5 | 71.3 | 59.7 | 49.8 | 39.4 | 58.0 |
| Avg. Max Temperature | 42.3 | 45.9 | 56.5 | 66.7 | 76.2 | 84.7 | 88.5 | 86.9 | 80.1 | 69.1 | 58.3 | 47.0 | 66.9 |
| Avg. Min Temperature | 26.8 | 29.1 | 37.7 | 46.4 | 56.6 | 66.5 | 71.4 | 70.0 | 62.5 | 50.3 | 41.1 | 31.7 | 49.2 |
| Days with Max Temp of 90 F or Higher | 0.0 | 0.0 | 0.0 | < 0.5 | 2.0 | 8.0 | 14.0 | 10.0 | 4.0 | < 0.5 | 0.0 | 0.0 | 37.0 |
| Days with Min Temp Below Freezing | 22.0 | 18.0 | 8.0 | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < 0.5 | 5.0 | 15.0 | 69.0 |
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| Washington National Airport Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Heating Degree Days | 942 | 770 | 552 | 264 | 60.0 | 0.0 | 0.0 | 0.0 | 14.0 | 195 | 456 | 794 | 4047 |
| Cooling Degree Days | 0.0 | 0.0 | 0.0 | 9.0 | 104 | 318 | 465 | 419 | 203 | 31.0 | 0.0 | 0.0 | 1549 |
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| Washington National Airport Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Precipitation (inches) | 2.7 | 2.7 | 3.2 | 2.7 | 3.7 | 3.4 | 3.8 | 3.9 | 3.3 | 3.0 | 3.1 | 3.1 | 38.6 |
| Days with Precipitation 0.01 inch or More | 10.0 | 9.0 | 11.0 | 10.0 | 11.0 | 10.0 | 10.0 | 9.0 | 8.0 | 7.0 | 9.0 | 9.0 | 113 |
| Monthly Snowfall (inches) | 5.5 | 5.4 | 2.2 | < 0.05 | < 0.05 | < 0.05 | < 0.05 | < 0.05 | 0.0 | 0.0 | 0.8 | 2.8 | 16.7 |
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| Other Washington National Airport Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Average Wind Speed | 10.0 | 10.3 | 10.9 | 10.5 | 9.3 | 8.9 | 8.3 | 8.1 | 8.3 | 8.7 | 9.4 | 9.6 | 9.4 |
| Clear Days | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 9.0 | 10.0 | 11.0 | 8.0 | 8.0 | 96.0 |
| Partly Cloudy Days | 7.0 | 7.0 | 8.0 | 9.0 | 10.0 | 11.0 | 12.0 | 10.0 | 8.0 | 8.0 | 8.0 | 7.0 | 106 |
| Cloudy Days | 16.0 | 15.0 | 15.0 | 14.0 | 14.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 14.0 | 16.0 | 164 |
| Percent of Possible Sunshine | 46.0 | 50.0 | 55.0 | 57.0 | 58.0 | 64.0 | 62.0 | 62.0 | 61.0 | 59.0 | 51.0 | 46.0 | 56.0 |
| Avg. Relative Humidity | 54.0 | 63.0 | 62.0 | 60.0 | 61.5 | 64.5 | 64.5 | 66.5 | 68.0 | 67.5 | 64.0 | 63.0 | 66.0 |
Weather information for other cities in District of Columbia