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Monthly climate in Harper, Texas, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Harper features a humid subtropical climate (Cfa).Temperatures typically range between 9 °C (49 °F) and 28 °C (82 °F) through the year, but rarely can drop to -16 °C (4 °F) or can rise to as high as 39 °C (103 °F).The average annual precipitation amounts to about 743 mm (29.3 inches) and receives 83 rainy days on the 1 mm (0.04 inches) threshold annually.Harper enjoys an average of 3231 hours of sunshine throughout the year, and daylight varies from 10 hours 12 minutes to 14 hours 3 minutes per day.

Monthly average temperatures in Harper, Texas, United States §

The warmest months in Harper are June, July and August, with daily mean temperatures ranging from 26 to 28 °C (79 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 9 to 11 °C (49 - 53 °F) throughout the day. On average each year, Harper experiences 179 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 Harper, 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)		 30°C
(87°F)		 31°C
(88°F)		 35°C
(95°F)		 37°C
(98°F)		 39°C
(102°F)		 39°C
(103°F)		 39°C
(102°F)		 37°C
(99°F)		 35°C
(95°F)		 30°C
(86°F)		 29°C
(84°F)
Mean maximum 24°C
(76°F)		 27°C
(81°F)		 29°C
(85°F)		 33°C
(92°F)		 34°C
(93°F)		 36°C
(97°F)		 38°C
(101°F)		 37°C
(98°F)		 36°C
(97°F)		 32°C
(90°F)		 27°C
(82°F)		 27°C
(80°F)
Average high 16°C
(61°F)		 17°C
(63°F)		 22°C
(73°F)		 25°C
(78°F)		 29°C
(84°F)		 32°C
(90°F)		 34°C
(93°F)		 34°C
(93°F)		 30°C
(87°F)		 26°C
(79°F)		 20°C
(69°F)		 18°C
(64°F)
Daily mean 9°C
(49°F)		 11°C
(52°F)		 16°C
(61°F)		 19°C
(66°F)		 23°C
(74°F)		 26°C
(79°F)		 28°C
(82°F)		 28°C
(82°F)		 25°C
(77°F)		 20°C
(68°F)		 14°C
(58°F)		 11°C
(53°F)
Average low 4°C
(39°F)		 5°C
(42°F)		 11°C
(51°F)		 13°C
(56°F)		 18°C
(64°F)		 21°C
(70°F)		 22°C
(72°F)		 22°C
(72°F)		 20°C
(67°F)		 14°C
(58°F)		 8°C
(48°F)		 6°C
(42°F)
Mean minimum -6°C
(22°F)		 -5°C
(22°F)		 1°C
(33°F)		 4°C
(40°F)		 11°C
(52°F)		 18°C
(64°F)		 19°C
(66°F)		 19°C
(66°F)		 13°C
(56°F)		 3°C
(37°F)		 -1°C
(31°F)		 -2°C
(28°F)
Minimum -10°C
(14°F)		 -16°C
(4°F)		 -6°C
(21°F)		 3°C
(38°F)		 7°C
(44°F)		 14°C
(57°F)		 15°C
(60°F)		 16°C
(62°F)		 8°C
(47°F)		 0°C
(33°F)		 -5°C
(23°F)		 -4°C
(26°F)

Compare climate in Harper with other places

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

Monthly average precipitation in Harper, Texas, United States §

Harper usually has the most precipitation in April, May and September, with an average of 9 rainy days and 106 mm (4.2 inches) of precipitation per month.The driest months in Harper are January, November and December. On average, 33 mm (1.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Harper, 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) 39 (1.5) 46 (1.8) 61 (2.4) 80 (3.2) 143 (5.6) 54 (2.1) 43 (1.7) 47 (1.9) 95 (3.8) 76 (3.0) 25 (1.0) 34 (1.3)
Average precipitation days (≥ 1 mm) 5 7 7 7 12 9 6 7 8 8 3 4

Monthly sunshine hours in Harper, Texas, United States §

The sunniest months in Harper are June, July and August, when the sun shines an average of 11 hours 13 minutes a day.Least sunny months in Harper: January, February and November receive an average of 6 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Harper, 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 185 188 246 265 293 337 356 337 286 269 228 234
Mean daily daylight hours 10h 25m 11h 7m 12h 0m 12h 55m 13h 41m 14h 3m 13h 51m 13h 10m 12h 18m 11h 23m 10h 36m 10h 12m

Solar UV radiation in Harper, Texas, United States §

Harper experiences the highest level of ultraviolet (UV) radiation in June, 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 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 Harper UV Index data.

Average daily maximum UV levels by month for Harper, 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 12 11 9 6 5