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Rosslyn, Virginia Climate Averages

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Rosslyn Monthly Climate Averages

January
February
March
April
May
June
July
August
September
October
November
December
Hi 42°F Lo 29°F Hi 47°F Lo 31°F Hi 55°F Lo 38°F Hi 66°F Lo 47°F Hi 75°F Lo 57°F Hi 84°F Lo 65°F Hi 89°F Lo 71°F Hi 87°F Lo 69°F Hi 80°F Lo 63°F Hi 69°F Lo 52°F Hi 56°F Lo 41°F Hi 48°F Lo 35°F
8 mph 8 mph 8 mph 8 mph 6 mph 6 mph 5 mph 5 mph 6 mph 7 mph 7 mph 7 mph
3.2 in 3.1 in 3.7 in 4.1 in 4.2 in 4.6 in 5.1 in 4.7 in 4.6 in 4.3 in 3 in 4.4 in
71% 72% 70% 69% 74% 71% 69% 70% 71% 72% 69% 73%
43% 44% 44% 42% 44% 35% 34% 35% 36% 38% 34% 44%
30.1 in 30.1 in 30.1 in 30.0 in 30.0 in 29.9 in 30.0 in 30.0 in 30.0 in 30.0 in 30.1 in 30.1 in
22 18 23 23 22 20 20 21 23 25 25 23
7 7 6 7 9 10 11 10 7 6 5 7
3 3 1 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 1
2 2 3 4 6 6 6 6 5 3 2 2
176 158 172 182 185 218 228 216 207 211 218 184
January
February
March
April
May
June
July
August
September
October
November
December
Hi 6°C Lo -2°C Hi 8°C Lo -1°C Hi 13°C Lo 3°C Hi 19°C Lo 8°C Hi 24°C Lo 14°C Hi 29°C Lo 18°C Hi 32°C Lo 22°C Hi 31°C Lo 21°C Hi 27°C Lo 17°C Hi 20°C Lo 11°C Hi 13°C Lo 5°C Hi 9°C Lo 2°C
12 km/h 12 km/h 13 km/h 12 km/h 10 km/h 9 km/h 8 km/h 8 km/h 9 km/h 10 km/h 11 km/h 11 km/h
81 mm 78 mm 95 mm 104 mm 107 mm 117 mm 130 mm 120 mm 118 mm 109 mm 76 mm 112 mm
71% 72% 70% 69% 74% 71% 69% 70% 71% 72% 69% 73%
43% 44% 44% 42% 44% 35% 34% 35% 36% 38% 34% 44%
1019 mb 1019 mb 1019 mb 1016 mb 1017 mb 1014 mb 1015 mb 1015 mb 1017 mb 1017 mb 1021 mb 1020 mb
22 18 23 23 22 20 20 21 23 25 25 23
7 7 6 7 9 10 11 10 7 6 5 7
3 3 1 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 1
2 2 3 4 6 6 6 6 5 3 2 2
176 158 172 182 185 218 228 216 207 211 218 184
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.

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