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Monthly climate in Katy, Texas, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Katy features a humid subtropical climate (Cfa).Temperatures typically range between 12 °C (55 °F) and 29 °C (85 °F) through the year, but rarely can drop to -13 °C (8 °F) or can rise to as high as 40 °C (104 °F).The average annual precipitation amounts to about 1367 mm (53.8 inches) and receives 148 rainy days on the 1 mm (0.04 inches) threshold annually.Katy enjoys an average of 3159 hours of sunshine throughout the year, and daylight varies from 10 hours 15 minutes to 14 hours 0 minutes per day.

Monthly average temperatures in Katy, Texas, United States §

The warmest months in Katy are June, July and August, with daily mean temperatures ranging from 28 to 29 °C (83 - 85 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 12 to 14 °C (55 - 58 °F) throughout the day. On average each year, Katy experiences 210 days above 25 °C (77.0 °F) and 7 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Katy, 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 29°C
(84°F)		 31°C
(87°F)		 33°C
(91°F)		 35°C
(95°F)		 36°C
(96°F)		 36°C
(97°F)		 40°C
(104°F)		 39°C
(102°F)		 38°C
(100°F)		 34°C
(93°F)		 31°C
(88°F)		 29°C
(84°F)
Mean maximum 26°C
(80°F)		 27°C
(82°F)		 30°C
(86°F)		 32°C
(90°F)		 34°C
(94°F)		 35°C
(96°F)		 37°C
(100°F)		 37°C
(99°F)		 35°C
(96°F)		 33°C
(92°F)		 30°C
(86°F)		 27°C
(81°F)
Average high 18°C
(65°F)		 20°C
(68°F)		 24°C
(76°F)		 27°C
(80°F)		 31°C
(87°F)		 32°C
(91°F)		 34°C
(93°F)		 34°C
(94°F)		 31°C
(89°F)		 28°C
(82°F)		 23°C
(73°F)		 20°C
(68°F)
Daily mean 12°C
(55°F)		 14°C
(58°F)		 19°C
(66°F)		 21°C
(70°F)		 25°C
(78°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(85°F)		 27°C
(80°F)		 22°C
(72°F)		 17°C
(63°F)		 14°C
(58°F)
Average low 8°C
(46°F)		 9°C
(49°F)		 14°C
(57°F)		 16°C
(61°F)		 21°C
(70°F)		 24°C
(75°F)		 25°C
(77°F)		 25°C
(77°F)		 23°C
(73°F)		 18°C
(64°F)		 12°C
(53°F)		 9°C
(49°F)
Mean minimum -3°C
(27°F)		 -2°C
(29°F)		 4°C
(39°F)		 7°C
(45°F)		 14°C
(58°F)		 21°C
(71°F)		 22°C
(72°F)		 22°C
(72°F)		 16°C
(62°F)		 7°C
(45°F)		 2°C
(37°F)		 0°C
(32°F)
Minimum -8°C
(18°F)		 -13°C
(8°F)		 -2°C
(29°F)		 3°C
(38°F)		 11°C
(51°F)		 19°C
(66°F)		 20°C
(69°F)		 22°C
(71°F)		 12°C
(54°F)		 2°C
(36°F)		 -1°C
(30°F)		 -2°C
(29°F)

Compare climate in Katy with other places

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

Monthly average precipitation in Katy, Texas, United States §

Katy usually has the most precipitation in May, August and September, with an average of 15 rainy days and 163 mm (6.4 inches) of precipitation per month.The driest months in Katy are March, April and November. On average, 76 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Katy, 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) 81 (3.2) 92 (3.6) 72 (2.8) 80 (3.1) 165 (6.5) 156 (6.1) 125 (4.9) 167 (6.6) 157 (6.2) 92 (3.6) 75 (3.0) 106 (4.2)
Average precipitation days (≥ 1 mm) 9 13 11 11 14 15 15 16 15 12 8 9

Monthly sunshine hours in Katy, Texas, United States §

The sunniest months in Katy are June, July and August, when the sun shines an average of 10 hours 30 minutes a day.Least sunny months in Katy: January, February and December receive an average of 6 hours 8 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Katy, 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 173 164 250 267 307 317 327 322 277 277 250 222
Mean daily daylight hours 10h 27m 11h 8m 12h 0m 12h 54m 13h 39m 14h 0m 13h 48m 13h 9m 12h 17m 11h 24m 10h 38m 10h 15m

Solar UV radiation in Katy, Texas, United States §

Katy experiences the highest level of ultraviolet (UV) radiation in April, June and August, 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 Katy UV Index data.

Average daily maximum UV levels by month for Katy, 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 11 11 10 9 6 5