Round Rock, TX · 2026
Sunrise and sunset in Round Rock, Texas
Short answer
- Longest day
- 14 h 07 min
- Shortest day
- 10 h 10 min
Round Rock daylight through 2026
Daylight in Round Rock runs from 10 h 10 min on December 21 to 14 h 07 min on June 21, a seasonal swing of 3 h 57 min between June 21 and December 21. That swing ranks 296th of 342 US cities of 100,000+, where 1st is the largest. Around the March equinox the city gets 12 h 08 min, and around the September equinox 12 h 08 min.
Round Rock daylight by month
| Month | Average | Sunrise | Sunset |
|---|---|---|---|
| January | 10 h 26 min | 7:22 AM to 7:28 AM | 5:40 PM to 6:06 PM |
| February | 11 h 08 min | 6:57 AM to 7:21 AM | 6:07 PM to 6:28 PM |
| March | 12 h 00 min | 6:49 AM to 7:48 AM | 6:29 PM to 7:49 PM |
| April | 12 h 56 min | 6:47 AM to 7:19 AM | 7:49 PM to 8:08 PM |
| May | 13 h 42 min | 6:29 AM to 6:46 AM | 8:08 PM to 8:28 PM |
| June | 14 h 05 min | 6:27 AM to 6:31 AM | 8:28 PM to 8:37 PM |
| July | 13 h 53 min | 6:31 AM to 6:48 AM | 8:25 PM to 8:37 PM |
| August | 13 h 13 min | 6:48 AM to 7:06 AM | 7:54 PM to 8:24 PM |
| September | 12 h 20 min | 7:07 AM to 7:23 AM | 7:16 PM to 7:53 PM |
| October | 11 h 25 min | 7:24 AM to 7:44 AM | 6:43 PM to 7:15 PM |
| November | 10 h 37 min | 6:45 AM to 7:09 AM | 5:29 PM to 5:42 PM |
| December | 10 h 13 min | 7:10 AM to 7:27 AM | 5:29 PM to 5:40 PM |
Earliest sunrise, latest sunset and the clock
The earliest sunrise comes on June 6 at 6:27 AM and the latest sunset on June 27 at 8:37 PM. The latest sunrise is 7:48 AM on March 8. Daylight saving time starts and ends on March 8 and November 1, which shifts every clock time by an hour.
On standard time the clocks run 6 hours behind UTC, the time of the 90° W meridian. Round Rock sits at 97.66° W, so the sun runs about 31 minutes behind the zone clock. Solar noon is at 12:40 PM on January 15 and 1:36 PM on July 15.
Compared with nearby cities
Austin, the state capital, gets 1 minutes less daylight than Round Rock on June 21 and 1 minutes more on December 21. Day length depends on latitude, so the table lists the paired cities from north to south.
| City | Latitude | June 21 | December 21 |
|---|---|---|---|
| Waco, TX | 31.56° N | 14 h 13 min | 10 h 05 min |
| San Angelo, TX | 31.44° N | 14 h 12 min | 10 h 06 min |
| Killeen, TX | 31.08° N | 14 h 10 min | 10 h 08 min |
| Georgetown, TX | 30.67° N | 14 h 08 min | 10 h 10 min |
| College Station, TX | 30.59° N | 14 h 08 min | 10 h 10 min |
| Round Rock, TX | 30.53° N | 14 h 07 min | 10 h 10 min |
| Conroe, TX | 30.33° N | 14 h 06 min | 10 h 11 min |
| Austin, TX | 30.30° N | 14 h 06 min | 10 h 11 min |
| Houston, TX | 29.79° N | 14 h 04 min | 10 h 14 min |
| New Braunfels, TX | 29.70° N | 14 h 03 min | 10 h 14 min |
| Pasadena, TX | 29.66° N | 14 h 03 min | 10 h 14 min |
| San Antonio, TX | 29.46° N | 14 h 02 min | 10 h 15 min |
| Laredo, TX | 27.56° N | 13 h 53 min | 10 h 24 min |
Questions people ask
What is the longest day of the year in Round Rock?
June 21, 2026, with 14 h 07 min of daylight: sunrise 6:28 AM, sunset 8:36 PM.
What is the shortest day in Round Rock?
December 21, 2026, with 10 h 10 min: sunrise 7:23 AM, sunset 5:34 PM.
When is the latest sunset in Round Rock?
8:37 PM on June 27, 2026. The earliest sunset is 5:29 PM on November 25.
What time zone is Round Rock in?
America/Chicago. Clocks change on March 8 (to CDT) and November 1 (to CST) in 2026.
Sources and data as of
Data as of: computed for 2026 at the Census internal point of Round Rock, 30.526° N, 97.664° W; time zone from Open-Meteo.
- 01SunCalc library (Vladimir Agafonkin), algorithms after Jean Meeus
- 02IANA time zone database (clock times and daylight saving rules)
How every number is computed: methodology. Spotted a wrong figure? Report an error.