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Monthly climate in Portland, Texas, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Portland features a humid subtropical climate (Cfa).Temperatures typically range between 14 °C (58 °F) and 29 °C (85 °F) through the year, but rarely can drop to -7 °C (20 °F) or can rise to as high as 37 °C (98 °F).The average annual precipitation amounts to about 938 mm (36.9 inches) and receives 109 rainy days on the 1 mm (0.04 inches) threshold annually.Portland enjoys an average of 3262 hours of sunshine throughout the year, and daylight varies from 10 hours 23 minutes to 13 hours 52 minutes per day.

Monthly average temperatures in Portland, Texas, United States §

The warmest months in Portland 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 14 to 16 °C (58 - 61 °F) throughout the day. On average each year, Portland experiences 202 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 Portland, 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
(85°F)		 29°C
(85°F)		 31°C
(87°F)		 35°C
(96°F)		 33°C
(92°F)		 37°C
(98°F)		 36°C
(97°F)		 35°C
(96°F)		 34°C
(93°F)		 33°C
(92°F)		 30°C
(86°F)		 27°C
(81°F)
Mean maximum 26°C
(79°F)		 26°C
(79°F)		 29°C
(84°F)		 32°C
(89°F)		 32°C
(89°F)		 33°C
(92°F)		 34°C
(93°F)		 34°C
(93°F)		 33°C
(92°F)		 32°C
(90°F)		 29°C
(84°F)		 26°C
(80°F)
Average high 19°C
(66°F)		 19°C
(67°F)		 23°C
(74°F)		 26°C
(79°F)		 29°C
(84°F)		 31°C
(88°F)		 31°C
(89°F)		 32°C
(90°F)		 31°C
(88°F)		 28°C
(82°F)		 23°C
(74°F)		 20°C
(69°F)
Daily mean 14°C
(58°F)		 16°C
(60°F)		 20°C
(68°F)		 23°C
(73°F)		 26°C
(79°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(85°F)		 28°C
(82°F)		 24°C
(75°F)		 19°C
(66°F)		 16°C
(61°F)
Average low 10°C
(51°F)		 12°C
(54°F)		 17°C
(62°F)		 19°C
(67°F)		 23°C
(74°F)		 26°C
(78°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(76°F)		 20°C
(68°F)		 15°C
(59°F)		 12°C
(53°F)
Mean minimum 1°C
(34°F)		 2°C
(35°F)		 7°C
(45°F)		 11°C
(51°F)		 17°C
(64°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(75°F)		 19°C
(67°F)		 9°C
(48°F)		 6°C
(42°F)		 4°C
(39°F)
Minimum -4°C
(25°F)		 -7°C
(20°F)		 1°C
(34°F)		 7°C
(45°F)		 14°C
(57°F)		 20°C
(69°F)		 22°C
(72°F)		 22°C
(73°F)		 16°C
(61°F)		 5°C
(41°F)		 1°C
(33°F)		 1°C
(34°F)

Compare climate in Portland with other places

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

Monthly average precipitation in Portland, Texas, United States §

Portland usually has the most precipitation in May, June and September, with an average of 13 rainy days and 138 mm (5.4 inches) of precipitation per month.The driest months in Portland are January, February and April. On average, 38 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Portland, 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) 31 (1.2) 52 (2.1) 44 (1.7) 138 (5.4) 136 (5.4) 101 (4.0) 81 (3.2) 141 (5.6) 77 (3.0) 51 (2.0) 47 (1.9)
Average precipitation days (≥ 1 mm) 5 6 7 6 12 13 11 11 16 11 6 5

Monthly sunshine hours in Portland, Texas, United States §

The sunniest months in Portland are June, July and August, when the sun shines an average of 10 hours 47 minutes a day.Least sunny months in Portland: January, February and December receive an average of 6 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Portland, 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 178 187 251 277 317 331 331 329 288 287 248 234
Mean daily daylight hours 10h 35m 11h 12m 12h 0m 12h 50m 13h 31m 13h 52m 13h 41m 13h 4m 12h 16m 11h 27m 10h 44m 10h 23m

Solar UV radiation in Portland, Texas, United States §

Portland 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 7. For more detailed information, check out our hourly Portland UV Index data.

Average daily maximum UV levels by month for Portland, 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 7 5