WeatherWX.com
Ashburn Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 58°F Lo 42°F | Hi 63°F Lo 46°F | Hi 69°F Lo 51°F | Hi 76°F Lo 57°F | Hi 83°F Lo 65°F | Hi 89°F Lo 72°F | Hi 90°F Lo 74°F | Hi 90°F Lo 73°F | Hi 86°F Lo 69°F | Hi 78°F Lo 60°F | Hi 67°F Lo 50°F | Hi 61°F Lo 46°F |
| 9 mph | 9 mph | 9 mph | 8 mph | 7 mph | 6 mph | 6 mph | 6 mph | 7 mph | 8 mph | 8 mph | 8 mph |
| 3.7 in | 4.3 in | 4 in | 4.4 in | 3.3 in | 4.3 in | 4.5 in | 4.8 in | 3.7 in | 2.3 in | 2.4 in | 4.4 in |
| 71% | 74% | 72% | 71% | 70% | 73% | 74% | 76% | 74% | 69% | 69% | 75% |
| 36% | 40% | 37% | 30% | 30% | 34% | 37% | 39% | 33% | 28% | 31% | 40% |
| 30.1 in | 30.1 in | 30.1 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 25 | 22 | 24 | 23 | 24 | 18 | 16 | 16 | 22 | 27 | 26 | 24 |
| 6 | 6 | 7 | 7 | 7 | 12 | 15 | 15 | 8 | 4 | 4 | 7 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3 | 4 | 4 | 5 | 6 | 6 | 6 | 6 | 5 | 5 | 4 | 3 |
| 214 | 169 | 203 | 230 | 239 | 215 | 205 | 201 | 217 | 248 | 230 | 195 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 14°C Lo 5°C | Hi 17°C Lo 8°C | Hi 21°C Lo 10°C | Hi 24°C Lo 14°C | Hi 28°C Lo 18°C | Hi 31°C Lo 22°C | Hi 32°C Lo 23°C | Hi 32°C Lo 23°C | Hi 30°C Lo 21°C | Hi 26°C Lo 15°C | Hi 20°C Lo 10°C | Hi 16°C Lo 8°C |
| 14 km/h | 14 km/h | 14 km/h | 13 km/h | 12 km/h | 10 km/h | 10 km/h | 9 km/h | 10 km/h | 12 km/h | 13 km/h | 13 km/h |
| 93 mm | 108 mm | 102 mm | 111 mm | 83 mm | 109 mm | 114 mm | 122 mm | 94 mm | 59 mm | 62 mm | 112 mm |
| 71% | 74% | 72% | 71% | 70% | 73% | 74% | 76% | 74% | 69% | 69% | 75% |
| 36% | 40% | 37% | 30% | 30% | 34% | 37% | 39% | 33% | 28% | 31% | 40% |
| 1021 mb | 1020 mb | 1019 mb | 1017 mb | 1017 mb | 1015 mb | 1016 mb | 1015 mb | 1016 mb | 1017 mb | 1020 mb | 1021 mb |
| 25 | 22 | 24 | 23 | 24 | 18 | 16 | 16 | 22 | 27 | 26 | 24 |
| 6 | 6 | 7 | 7 | 7 | 12 | 15 | 15 | 8 | 4 | 4 | 7 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3 | 4 | 4 | 5 | 6 | 6 | 6 | 6 | 5 | 5 | 4 | 3 |
| 214 | 169 | 203 | 230 | 239 | 215 | 205 | 201 | 217 | 248 | 230 | 195 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.