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Monthly climate in Harlingen, Texas, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Harlingen features a humid subtropical climate (Cfa).Temperatures typically range between 17 °C (62 °F) and 30 °C (87 °F) through the year, but rarely can drop to -5 °C (24 °F) or can rise to as high as 42 °C (107 °F).The average annual precipitation amounts to about 641 mm (25.2 inches) and receives 97 rainy days on the 1 mm (0.04 inches) threshold annually.Harlingen enjoys an average of 3323 hours of sunshine throughout the year, and daylight varies from 10 hours 31 minutes to 13 hours 44 minutes per day.

Monthly average temperatures in Harlingen, Texas, United States §

The warmest months in Harlingen are June, July and August, with daily mean temperatures ranging from 29 to 30 °C (85 - 87 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 17 to 18 °C (62 - 65 °F) throughout the day. On average each year, Harlingen experiences 262 days above 25 °C (77.0 °F) and 1 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Harlingen, 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 35°C
(94°F)		 36°C
(97°F)		 35°C
(96°F)		 42°C
(107°F)		 37°C
(100°F)		 41°C
(105°F)		 41°C
(106°F)		 39°C
(103°F)		 38°C
(101°F)		 37°C
(98°F)		 34°C
(93°F)		 34°C
(93°F)
Mean maximum 31°C
(88°F)		 32°C
(89°F)		 34°C
(94°F)		 38°C
(100°F)		 36°C
(98°F)		 37°C
(99°F)		 39°C
(102°F)		 38°C
(101°F)		 37°C
(100°F)		 35°C
(96°F)		 33°C
(91°F)		 31°C
(88°F)
Average high 22°C
(73°F)		 24°C
(75°F)		 27°C
(81°F)		 30°C
(87°F)		 33°C
(91°F)		 34°C
(93°F)		 35°C
(95°F)		 36°C
(97°F)		 33°C
(92°F)		 30°C
(87°F)		 26°C
(79°F)		 24°C
(75°F)
Daily mean 17°C
(62°F)		 18°C
(65°F)		 22°C
(72°F)		 25°C
(77°F)		 28°C
(82°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(87°F)		 28°C
(83°F)		 25°C
(77°F)		 21°C
(69°F)		 18°C
(65°F)
Average low 12°C
(54°F)		 14°C
(57°F)		 18°C
(64°F)		 20°C
(69°F)		 24°C
(75°F)		 25°C
(78°F)		 26°C
(78°F)		 26°C
(79°F)		 24°C
(76°F)		 20°C
(69°F)		 16°C
(61°F)		 13°C
(56°F)
Mean minimum 2°C
(36°F)		 3°C
(38°F)		 9°C
(48°F)		 12°C
(54°F)		 17°C
(64°F)		 23°C
(73°F)		 23°C
(74°F)		 24°C
(75°F)		 20°C
(68°F)		 10°C
(50°F)		 7°C
(45°F)		 3°C
(38°F)
Minimum -1°C
(30°F)		 -5°C
(24°F)		 3°C
(38°F)		 9°C
(48°F)		 15°C
(58°F)		 19°C
(67°F)		 21°C
(70°F)		 23°C
(74°F)		 18°C
(64°F)		 7°C
(45°F)		 2°C
(36°F)		 1°C
(33°F)

Compare climate in Harlingen with other places

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

Monthly average precipitation in Harlingen, Texas, United States §

Harlingen usually has the most precipitation in June, July and September, with an average of 12 rainy days and 100 mm (3.9 inches) of precipitation per month.The driest months in Harlingen are January, February and December. On average, 23 mm (0.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Harlingen, 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) 24 (1.0) 21 (0.8) 35 (1.4) 30 (1.2) 81 (3.2) 91 (3.6) 94 (3.7) 33 (1.3) 114 (4.5) 64 (2.5) 30 (1.2) 23 (0.9)
Average precipitation days (≥ 1 mm) 5 6 6 5 8 13 10 9 15 9 7 4

Monthly sunshine hours in Harlingen, Texas, United States §

The sunniest months in Harlingen are June, July and August, when the sun shines an average of 10 hours 55 minutes a day.Least sunny months in Harlingen: January, February and December receive an average of 6 hours 54 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Harlingen, 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 180 205 260 280 321 331 334 338 289 290 247 242
Mean daily daylight hours 10h 41m 11h 16m 12h 1m 12h 47m 13h 25m 13h 44m 13h 34m 13h 0m 12h 15m 11h 30m 10h 50m 10h 31m

Solar UV radiation in Harlingen, Texas, United States §

Harlingen experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 12 - 12, which corresponds to the Extreme category of sun exposure.January, November and December are in the High exposure category. In these months, the maximum values of the UV index do not exceed 7. For more detailed information, check out our hourly Harlingen UV Index data.

Average daily maximum UV levels by month for Harlingen, 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) 6 9 10 11 12 12 12 12 11 10 7 6