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Monthly climate in Justin, Texas, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Justin features a humid subtropical climate (Cfa).Temperatures typically range between 8 °C (46 °F) and 30 °C (85 °F) through the year, but rarely can drop to -19 °C (-3 °F) or can rise to as high as 42 °C (109 °F).The average annual precipitation amounts to about 1026 mm (40.4 inches) and receives 97 rainy days on the 1 mm (0.04 inches) threshold annually.Justin enjoys an average of 3171 hours of sunshine throughout the year, and daylight varies from 9 hours 59 minutes to 14 hours 16 minutes per day.

Monthly average temperatures in Justin, Texas, United States §

The warmest months in Justin are June, July and August, with daily mean temperatures ranging from 27 to 30 °C (82 - 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 (46 - 51 °F) throughout the day. On average each year, Justin experiences 172 days above 25 °C (77.0 °F) and 21 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Justin, 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
(88°F)		 33°C
(91°F)		 34°C
(94°F)		 36°C
(97°F)		 39°C
(102°F)		 42°C
(109°F)		 41°C
(105°F)		 38°C
(101°F)		 36°C
(96°F)		 33°C
(92°F)		 29°C
(84°F)
Mean maximum 24°C
(75°F)		 27°C
(82°F)		 30°C
(86°F)		 32°C
(90°F)		 34°C
(93°F)		 36°C
(97°F)		 39°C
(102°F)		 38°C
(101°F)		 37°C
(98°F)		 34°C
(94°F)		 28°C
(83°F)		 26°C
(78°F)
Average high 14°C
(57°F)		 15°C
(60°F)		 22°C
(71°F)		 24°C
(76°F)		 29°C
(84°F)		 32°C
(91°F)		 35°C
(95°F)		 34°C
(94°F)		 31°C
(89°F)		 26°C
(78°F)		 20°C
(68°F)		 16°C
(62°F)
Daily mean 8°C
(46°F)		 9°C
(49°F)		 16°C
(60°F)		 18°C
(65°F)		 24°C
(75°F)		 27°C
(82°F)		 30°C
(85°F)		 29°C
(85°F)		 26°C
(79°F)		 20°C
(68°F)		 13°C
(56°F)		 11°C
(51°F)
Average low 3°C
(37°F)		 4°C
(40°F)		 10°C
(50°F)		 13°C
(55°F)		 18°C
(65°F)		 23°C
(73°F)		 25°C
(77°F)		 24°C
(76°F)		 21°C
(70°F)		 14°C
(58°F)		 8°C
(46°F)		 5°C
(42°F)
Mean minimum -7°C
(20°F)		 -6°C
(21°F)		 0°C
(33°F)		 3°C
(39°F)		 11°C
(51°F)		 19°C
(67°F)		 21°C
(70°F)		 21°C
(70°F)		 15°C
(58°F)		 4°C
(39°F)		 -1°C
(30°F)		 -3°C
(28°F)
Minimum -13°C
(10°F)		 -19°C
(-3°F)		 -6°C
(21°F)		 1°C
(34°F)		 6°C
(43°F)		 17°C
(63°F)		 18°C
(64°F)		 19°C
(67°F)		 10°C
(51°F)		 1°C
(35°F)		 -5°C
(23°F)		 -6°C
(22°F)

Compare climate in Justin with other places

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

Monthly average precipitation in Justin, Texas, United States §

Justin usually has the most precipitation in April, May and October, with an average of 9 rainy days and 129 mm (5.1 inches) of precipitation per month.The driest months in Justin are January, July and December. On average, 48 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Justin, 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) 52 (2.0) 89 (3.5) 100 (3.9) 104 (4.1) 150 (5.9) 88 (3.5) 40 (1.6) 87 (3.4) 79 (3.1) 133 (5.2) 54 (2.1) 52 (2.0)
Average precipitation days (≥ 1 mm) 7 9 10 8 12 8 7 7 8 8 6 7

Monthly sunshine hours in Justin, Texas, United States §

The sunniest months in Justin are June, July and August, when the sun shines an average of 11 hours 9 minutes a day.Least sunny months in Justin: January, February and December receive an average of 6 hours 22 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Justin, 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 175 176 240 258 284 340 357 328 281 262 237 227
Mean daily daylight hours 10h 14m 11h 0m 11h 59m 13h 1m 13h 51m 14h 16m 14h 3m 13h 17m 12h 19m 11h 18m 10h 26m 9h 59m

Solar UV radiation in Justin, Texas, United States §

Justin 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 Justin UV Index data.

Average daily maximum UV levels by month for Justin, 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