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Monthly climate in Round Rock, Texas, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Round Rock features a humid subtropical climate (Cfa).Temperatures typically range between 11 °C (51 °F) and 30 °C (86 °F) through the year, but rarely can drop to -15 °C (6 °F) or can rise to as high as 42 °C (109 °F).The average annual precipitation amounts to about 979 mm (38.5 inches) and receives 102 rainy days on the 1 mm (0.04 inches) threshold annually.Round Rock enjoys an average of 3130 hours of sunshine throughout the year, and daylight varies from 10 hours 12 minutes to 14 hours 4 minutes per day.

Monthly average temperatures in Round Rock, Texas, United States §

The warmest months in Round Rock are June, July and August, with daily mean temperatures ranging from 28 to 30 °C (82 - 86 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 11 to 12 °C (51 - 55 °F) throughout the day. On average each year, Round Rock experiences 194 days above 25 °C (77.0 °F) and 13 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Round Rock, Texas, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 27°C
(80°F)		 31°C
(87°F)		 33°C
(91°F)		 35°C
(96°F)		 37°C
(99°F)		 38°C
(101°F)		 42°C
(109°F)		 41°C
(105°F)		 38°C
(101°F)		 36°C
(97°F)		 30°C
(86°F)		 28°C
(83°F)
Mean maximum 25°C
(77°F)		 28°C
(82°F)		 30°C
(87°F)		 33°C
(92°F)		 35°C
(95°F)		 37°C
(98°F)		 39°C
(103°F)		 39°C
(102°F)		 37°C
(99°F)		 34°C
(93°F)		 29°C
(84°F)		 27°C
(81°F)
Average high 17°C
(62°F)		 17°C
(63°F)		 23°C
(74°F)		 26°C
(79°F)		 30°C
(86°F)		 33°C
(92°F)		 35°C
(96°F)		 36°C
(97°F)		 32°C
(90°F)		 27°C
(81°F)		 21°C
(71°F)		 19°C
(66°F)
Daily mean 11°C
(51°F)		 11°C
(53°F)		 17°C
(63°F)		 20°C
(68°F)		 25°C
(76°F)		 28°C
(82°F)		 30°C
(85°F)		 30°C
(86°F)		 26°C
(80°F)		 21°C
(70°F)		 15°C
(60°F)		 12°C
(55°F)
Average low 5°C
(42°F)		 6°C
(44°F)		 12°C
(54°F)		 14°C
(58°F)		 19°C
(67°F)		 23°C
(74°F)		 24°C
(76°F)		 24°C
(76°F)		 21°C
(71°F)		 16°C
(61°F)		 10°C
(50°F)		 7°C
(45°F)
Mean minimum -4°C
(25°F)		 -4°C
(25°F)		 2°C
(36°F)		 6°C
(42°F)		 12°C
(55°F)		 20°C
(69°F)		 21°C
(70°F)		 21°C
(70°F)		 15°C
(60°F)		 5°C
(42°F)		 0°C
(33°F)		 -1°C
(30°F)
Minimum -9°C
(16°F)		 -15°C
(6°F)		 -4°C
(26°F)		 4°C
(40°F)		 10°C
(50°F)		 17°C
(64°F)		 18°C
(64°F)		 19°C
(67°F)		 11°C
(52°F)		 3°C
(38°F)		 -4°C
(26°F)		 -3°C
(27°F)

Compare climate in Round Rock with other places

Compare temperature, precipitation, sunshine, UV index in Round Rock, Texas, United States with other places around the world.

Monthly average precipitation in Round Rock, Texas, United States §

Round Rock usually has the most precipitation in May, August and September, with an average of 10 rainy days and 122 mm (4.8 inches) of precipitation per month.The driest months in Round Rock are January, February and November. On average, 51 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Round Rock, Texas, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 47 (1.9) 60 (2.4) 67 (2.6) 88 (3.5) 155 (6.1) 76 (3.0) 69 (2.7) 103 (4.0) 109 (4.3) 90 (3.5) 46 (1.8) 69 (2.7)
Average precipitation days (≥ 1 mm) 6 9 9 9 14 10 7 7 10 9 6 6

Monthly sunshine hours in Round Rock, Texas, United States §

The sunniest months in Round Rock are June, July and August, when the sun shines an average of 10 hours 58 minutes a day.Least sunny months in Round Rock: January, February and December receive an average of 6 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Round Rock, Texas, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 172 166 231 261 282 332 349 327 276 270 234 226
Mean daily daylight hours 10h 25m 11h 6m 12h 0m 12h 55m 13h 41m 14h 4m 13h 51m 13h 10m 12h 18m 11h 23m 10h 35m 10h 12m

Solar UV radiation in Round Rock, Texas, United States §

Round Rock experiences the highest level of ultraviolet (UV) radiation in April, June and July, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Round Rock UV Index data.

Average daily maximum UV levels by month for Round Rock, Texas, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 5 8 9 11 11 12 12 11 10 9 6 5