UTC Offset
UTC-04:00
Rockville, United States Snapshot 2026
Where is Rockville?
Rockville, United States
- Continent
- Americas
- Country
- United States
- City
- Rockville
- Population
- 67K
- Elevation
- 137 m
- Coordinates
- 39.08°, -77.15°
Rockville is a city in United States with a population of approximately 67K. Average temperatures range from -2°C (28°F) in January to 31°C (87°F) in July. The best time to visit is April, May, June, August, September. The city sits at an elevation of 137 m above sea level.
Time in Rockville right now
Open full time & time zone page 16:22 22
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 Rockville
Daylight in Rockville today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 54m
Climate normals for Rockville
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 best
Good September best
Excellent October
Good November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 5°C / -2°C | 2°C / -7°C | 10days (84 mm) Wet | 6.1h Fair | 68% Muggy | 2.6 Moderate | Poor | View Details |
| February | 9°C / 0°C | 5°C / -4°C | 10days (89 mm) Wet | 6.7h Fair | 67% Muggy | 3.4 Moderate | Poor | View Details |
| March | 13°C / 3°C | 10°C / -1°C | 10days (79 mm) Wet | 8.2h Good | 64% Muggy | 5 Moderate | Fair | View Details |
| April best | 18°C / 8°C | 17°C / 5°C | 9days (84 mm) Wet | 9.1h Good | 65% Muggy | 5.8 High | Good | View Details |
| May best | 23°C / 13°C | 23°C / 12°C | 14days (123 mm) Wet | 9.3h Good | 73% Muggy | 6.5 High | Excellent | View Details |
| June best | 28°C / 18°C | 30°C / 19°C | 11days (107 mm) Wet | 11.3h Excellent | 69% Muggy | 7.3 Very High | Excellent | View Details |
| July | 31°C / 21°C | 34°C / 24°C | 14days (145 mm) Wet | 11.7h Excellent | 71% Muggy | 7.5 Very High | Fair | View Details |
| August best | 29°C / 20°C | 32°C / 22°C | 12days (110 mm) Wet | 10.5h Excellent | 74% Muggy | 6.9 High | Good | View Details |
| September best | 26°C / 17°C | 27°C / 18°C | 11days (107 mm) Wet | 8.5h Good | 74% Muggy | 5.2 High | Excellent | View Details |
| October | 20°C / 11°C | 19°C / 10°C | 8days (77 mm) Wet | 7.9h Good | 72% Muggy | 4.5 Moderate | Good | View Details |
| November | 13°C / 4°C | 10°C / 1°C | 8days (73 mm) Wet | 7.2h Good | 68% Muggy | 3.1 Moderate | Fair | View Details |
| December | 8°C / 0°C | 4°C / -4°C | 9days (97 mm) Wet | 5.9h Fair | 70% Muggy | 2.3 Moderate | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 5°C / -2°C . Feb: 9°C / 0°C . Mar: 13°C / 3°C . Apr: 18°C / 8°C . May: 23°C / 13°C . Jun: 28°C / 18°C . Jul: 31°C / 21°C . Aug: 29°C / 20°C . Sep: 26°C / 17°C . Oct: 20°C / 11°C . Nov: 13°C / 4°C . Dec: 8°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 84 mm. Feb: 89 mm. Mar: 79 mm. Apr: 84 mm. May: 123 mm. Jun: 107 mm. Jul: 145 mm. Aug: 110 mm. Sep: 107 mm. Oct: 77 mm. Nov: 73 mm. Dec: 97 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 68%. Feb: 67%. Mar: 64%. Apr: 65%. May: 73%. Jun: 69%. 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: 18 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: 17 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
Rockville has a population of approximately 67K.
The best months to visit Rockville are April, May, June, August, September, when temperatures are pleasant and rainfall is lower.
Rockville receives approximately 1175mm of rainfall annually across 126 rainy days.
Rockville is located in United States, in the Americas region.
Rockville sits at an elevation of 137 m (449 ft) above sea level.