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Monthly climate in Portland, Tennessee, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Portland features a humid subtropical climate (Cfa).Temperatures typically range between 4 °C (40 °F) and 27 °C (80 °F) through the year, but rarely can drop to -15 °C (5 °F) or can rise to as high as 36 °C (98 °F).The average annual precipitation amounts to about 1607 mm (63.3 inches) and receives 142 rainy days on the 1 mm (0.04 inches) threshold annually.Portland enjoys an average of 2928 hours of sunshine throughout the year, and daylight varies from 9 hours 41 minutes to 14 hours 36 minutes per day.

Monthly average temperatures in Portland, Tennessee, United States §

The warmest months in Portland are June, July and August, with daily mean temperatures ranging from 25 to 27 °C (77 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 7 °C (40 - 45 °F) throughout the day. On average each year, Portland experiences 131 days above 25 °C (77.0 °F) and 48 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, Tennessee, 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 22°C
(73°F)		 27°C
(80°F)		 28°C
(82°F)		 31°C
(89°F)		 33°C
(92°F)		 34°C
(94°F)		 36°C
(97°F)		 36°C
(98°F)		 36°C
(97°F)		 36°C
(98°F)		 27°C
(81°F)		 23°C
(73°F)
Mean maximum 20°C
(68°F)		 24°C
(75°F)		 25°C
(78°F)		 29°C
(84°F)		 32°C
(91°F)		 33°C
(92°F)		 35°C
(96°F)		 34°C
(93°F)		 33°C
(92°F)		 31°C
(88°F)		 23°C
(74°F)		 20°C
(69°F)
Average high 8°C
(47°F)		 12°C
(53°F)		 16°C
(61°F)		 20°C
(69°F)		 26°C
(79°F)		 29°C
(85°F)		 31°C
(89°F)		 30°C
(87°F)		 28°C
(83°F)		 23°C
(73°F)		 14°C
(58°F)		 12°C
(53°F)
Daily mean 4°C
(40°F)		 7°C
(44°F)		 11°C
(52°F)		 15°C
(59°F)		 21°C
(70°F)		 25°C
(77°F)		 27°C
(80°F)		 25°C
(78°F)		 23°C
(74°F)		 17°C
(63°F)		 9°C
(48°F)		 7°C
(45°F)
Average low 0°C
(33°F)		 2°C
(36°F)		 6°C
(43°F)		 9°C
(49°F)		 16°C
(61°F)		 20°C
(69°F)		 22°C
(73°F)		 21°C
(71°F)		 18°C
(65°F)		 12°C
(54°F)		 4°C
(39°F)		 2°C
(37°F)
Mean minimum -11°C
(13°F)		 -8°C
(17°F)		 -5°C
(23°F)		 0°C
(33°F)		 7°C
(45°F)		 15°C
(59°F)		 18°C
(65°F)		 16°C
(60°F)		 11°C
(52°F)		 3°C
(37°F)		 -4°C
(24°F)		 -6°C
(21°F)
Minimum -15°C
(5°F)		 -12°C
(10°F)		 -9°C
(16°F)		 -2°C
(30°F)		 4°C
(39°F)		 11°C
(52°F)		 17°C
(63°F)		 14°C
(57°F)		 8°C
(47°F)		 0°C
(33°F)		 -9°C
(17°F)		 -11°C
(13°F)

Compare climate in Portland with other places

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

Monthly average precipitation in Portland, Tennessee, United States §

Portland usually has the most precipitation in February, March and April, with an average of 13 rainy days and 164 mm (6.5 inches) of precipitation per month.The driest months in Portland are January, May and November. On average, 105 mm (4.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Portland, Tennessee, 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) 105 (4.1) 185 (7.3) 157 (6.2) 150 (5.9) 122 (4.8) 141 (5.5) 125 (4.9) 124 (4.9) 125 (4.9) 138 (5.4) 88 (3.4) 147 (5.8)
Average precipitation days (≥ 1 mm) 11 14 14 12 13 12 14 14 8 10 9 11

Monthly sunshine hours in Portland, Tennessee, United States §

The sunniest months in Portland are June, July and August, when the sun shines an average of 10 hours 25 minutes a day.Least sunny months in Portland: January, February and December receive an average of 5 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Portland, Tennessee, 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 139 147 214 247 293 318 332 307 277 259 216 173
Mean daily daylight hours 9h 58m 10h 51m 11h 59m 13h 9m 14h 7m 14h 36m 14h 20m 13h 28m 12h 21m 11h 12m 10h 12m 9h 41m

Solar UV radiation in Portland, Tennessee, United States §

Portland experiences the highest level of ultraviolet (UV) radiation in April, June and July, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Portland UV Index data.

Average daily maximum UV levels by month for Portland, Tennessee, 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) 3 6 7 10 10 11 11 10 9 7 5 3