UTC Offset
UTC-04:00
Rosslyn, United States Snapshot 2026
Where is Rosslyn?
Rosslyn, United States
- Continent
- Americas
- Country
- United States
- City
- Rosslyn
- Population
- 9.6K
- Elevation
- 26 m
- Coordinates
- 38.90°, -77.07°
Rosslyn is a city in United States with a population of approximately 9.6K. Average temperatures range from -1°C (30°F) in January to 32°C (89°F) in July. The best time to visit is April, May, June, September, October.
Time in Rosslyn right now
Open full time & time zone page 14:52 52
Monday, June 15, 2026
IANA time zone
America/New_York
Daylight saving
DST in effect
EST / EDT
Next DST change
November 1
backward -1h
Live weather in Rosslyn
Daylight in Rosslyn today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 53m
Climate normals for Rosslyn
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Fair April best
Good May best
Excellent June best
Excellent July
Fair August
Good September best
Excellent October best
Excellent November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 6°C / -1°C | 3°C / -6°C | 10days (84 mm) Wet | 6.2h Fair | 68% Muggy | 2.6 Moderate | Poor | View Details |
| February | 10°C / 1°C | 7°C / -3°C | 10days (88 mm) Wet | 6.7h Fair | 67% Muggy | 3.4 Moderate | Poor | View Details |
| March | 14°C / 4°C | 11°C / 0°C | 10days (84 mm) Wet | 8.2h Good | 64% Muggy | 4.9 Moderate | Fair | View Details |
| April best | 19°C / 9°C | 18°C / 6°C | 9days (84 mm) Wet | 9.1h Good | 65% Muggy | 5.8 High | Good | View Details |
| May best | 23°C / 14°C | 24°C / 13°C | 13days (118 mm) Wet | 9.3h Good | 73% Muggy | 6.5 High | Excellent | View Details |
| June best | 29°C / 19°C | 31°C / 20°C | 11days (112 mm) Wet | 11.4h Excellent | 68% Muggy | 7.4 Very High | Excellent | View Details |
| July | 32°C / 22°C | 35°C / 25°C | 14days (152 mm) Wet | 11.7h Excellent | 71% Muggy | 7.5 Very High | Fair | View Details |
| August | 30°C / 21°C | 33°C / 24°C | 12days (104 mm) Wet | 10.6h Excellent | 74% Muggy | 6.8 High | Good | View Details |
| September best | 26°C / 18°C | 28°C / 19°C | 11days (97 mm) Wet | 8.6h Good | 74% Muggy | 5.2 High | Excellent | View Details |
| October best | 21°C / 12°C | 20°C / 11°C | 8days (78 mm) Wet | 7.9h Good | 72% Muggy | 4.5 Moderate | Excellent | View Details |
| November | 14°C / 5°C | 11°C / 2°C | 8days (70 mm) Wet | 7.3h Good | 68% Muggy | 3.1 Moderate | Fair | View Details |
| December | 9°C / 1°C | 5°C / -3°C | 9days (98 mm) Wet | 5.9h Fair | 70% Muggy | 2.3 Moderate | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 6°C / -1°C . Feb: 10°C / 1°C . Mar: 14°C / 4°C . Apr: 19°C / 9°C . May: 23°C / 14°C . Jun: 29°C / 19°C . Jul: 32°C / 22°C . Aug: 30°C / 21°C . Sep: 26°C / 18°C . Oct: 21°C / 12°C . Nov: 14°C / 5°C . Dec: 9°C / 1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 84 mm. Feb: 88 mm. Mar: 84 mm. Apr: 84 mm. May: 118 mm. Jun: 112 mm. Jul: 152 mm. Aug: 104 mm. Sep: 97 mm. Oct: 78 mm. Nov: 70 mm. Dec: 98 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 68%. Feb: 67%. Mar: 64%. Apr: 65%. May: 73%. Jun: 68%. Jul: 71%. Aug: 74%. Sep: 74%. Oct: 72%. Nov: 68%. Dec: 70%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 17 km/h . Mar: 19 km/h . Apr: 18 km/h . May: 15 km/h . Jun: 14 km/h . Jul: 12 km/h . Aug: 12 km/h . Sep: 13 km/h . Oct: 15 km/h . Nov: 16 km/h . Dec: 16 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 3. Mar: UV 5. Apr: UV 6. May: UV 7. Jun: UV 7. Jul: UV 8. Aug: UV 7. Sep: UV 5. Oct: UV 5. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
Rosslyn has a population of approximately 9.6K.
The best months to visit Rosslyn are April, May, June, September, October, when temperatures are pleasant and rainfall is lower.
Rosslyn receives approximately 1169mm of rainfall annually across 125 rainy days.
Rosslyn is located in United States, in the Americas region.
Rosslyn sits at an elevation of 26 m (85 ft) above sea level.