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Monthly climate in Rockwall, Texas, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Rockwall features a humid subtropical climate (Cfa).Temperatures typically range between 8 °C (47 °F) and 29 °C (85 °F) through the year, but rarely can drop to -18 °C (-1 °F) or can rise to as high as 42 °C (107 °F).The average annual precipitation amounts to about 1224 mm (48.2 inches) and receives 103 rainy days on the 1 mm (0.04 inches) threshold annually.Rockwall enjoys an average of 3118 hours of sunshine throughout the year, and daylight varies from 10 hours 0 minutes to 14 hours 16 minutes per day.

Monthly average temperatures in Rockwall, Texas, United States §

The warmest months in Rockwall are June, July and August, with daily mean temperatures ranging from 27 to 29 °C (81 - 85 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 11 °C (47 - 51 °F) throughout the day. On average each year, Rockwall experiences 163 days above 25 °C (77.0 °F) and 20 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Rockwall, 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 26°C
(78°F)		 29°C
(85°F)		 31°C
(89°F)		 33°C
(92°F)		 35°C
(96°F)		 37°C
(99°F)		 42°C
(107°F)		 39°C
(103°F)		 37°C
(99°F)		 35°C
(95°F)		 33°C
(91°F)		 27°C
(81°F)
Mean maximum 23°C
(74°F)		 26°C
(79°F)		 29°C
(84°F)		 31°C
(87°F)		 33°C
(91°F)		 35°C
(96°F)		 38°C
(100°F)		 37°C
(99°F)		 36°C
(97°F)		 33°C
(92°F)		 28°C
(82°F)		 25°C
(77°F)
Average high 14°C
(57°F)		 15°C
(59°F)		 21°C
(70°F)		 24°C
(75°F)		 28°C
(83°F)		 32°C
(90°F)		 34°C
(93°F)		 34°C
(93°F)		 31°C
(88°F)		 25°C
(78°F)		 19°C
(67°F)		 16°C
(61°F)
Daily mean 8°C
(47°F)		 9°C
(49°F)		 15°C
(60°F)		 18°C
(65°F)		 23°C
(74°F)		 27°C
(81°F)		 29°C
(85°F)		 29°C
(84°F)		 26°C
(79°F)		 20°C
(68°F)		 13°C
(56°F)		 11°C
(51°F)
Average low 3°C
(38°F)		 4°C
(40°F)		 10°C
(50°F)		 13°C
(55°F)		 19°C
(66°F)		 23°C
(73°F)		 24°C
(76°F)		 24°C
(76°F)		 21°C
(71°F)		 15°C
(59°F)		 8°C
(46°F)		 6°C
(43°F)
Mean minimum -6°C
(21°F)		 -6°C
(22°F)		 0°C
(33°F)		 4°C
(39°F)		 11°C
(52°F)		 19°C
(66°F)		 21°C
(71°F)		 21°C
(71°F)		 15°C
(59°F)		 4°C
(39°F)		 -1°C
(31°F)		 -2°C
(28°F)
Minimum -12°C
(11°F)		 -18°C
(-1°F)		 -6°C
(21°F)		 1°C
(34°F)		 8°C
(46°F)		 15°C
(59°F)		 18°C
(65°F)		 19°C
(67°F)		 10°C
(51°F)		 1°C
(34°F)		 -5°C
(22°F)		 -5°C
(23°F)

Compare climate in Rockwall with other places

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

Monthly average precipitation in Rockwall, Texas, United States §

Rockwall usually has the most precipitation in April, May and October, with an average of 10 rainy days and 156 mm (6.1 inches) of precipitation per month.The driest months in Rockwall are January, July and November. On average, 59 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rockwall, 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) 64 (2.5) 111 (4.4) 121 (4.8) 138 (5.4) 180 (7.1) 91 (3.6) 55 (2.2) 95 (3.7) 89 (3.5) 148 (5.8) 58 (2.3) 73 (2.9)
Average precipitation days (≥ 1 mm) 6 10 10 9 12 9 7 8 8 10 7 7

Monthly sunshine hours in Rockwall, Texas, United States §

The sunniest months in Rockwall are June, July and August, when the sun shines an average of 11 hours 6 minutes a day.Least sunny months in Rockwall: January, February and December receive an average of 6 hours 6 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rockwall, 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 166 166 229 253 275 338 354 327 283 260 238 222
Mean daily daylight hours 10h 14m 11h 0m 12h 0m 13h 0m 13h 51m 14h 16m 14h 2m 13h 17m 12h 19m 11h 18m 10h 26m 10h 0m

Solar UV radiation in Rockwall, Texas, United States §

Rockwall experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure.January, February 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 Rockwall UV Index data.

Average daily maximum UV levels by month for Rockwall, 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) 4 6 8 10 11 11 11 11 10 8 6 4