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Monthly climate in Morton, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Morton features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 1 °C (35 °F) and 18 °C (64 °F) through the year, but rarely can drop to -18 °C (0 °F) or can rise to as high as 41 °C (105 °F).The average annual precipitation amounts to about 1919 mm (75.6 inches) and receives 170 rainy days on the 1 mm (0.04 inches) threshold annually.Morton enjoys an average of 2625 hours of sunshine throughout the year, and daylight varies from 8 hours 37 minutes to 15 hours 45 minutes per day.

Monthly average temperatures in Morton, Washington, United States §

The warmest months in Morton are July, August and September, with daily mean temperatures ranging from 14 to 18 °C (58 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 2 °C (35 - 37 °F) throughout the day. On average each year, Morton experiences 27 days above 25 °C (77.0 °F) and 70 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Morton, Washington, 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 13°C
(55°F)		 15°C
(59°F)		 20°C
(68°F)		 29°C
(84°F)		 29°C
(84°F)		 41°C
(105°F)		 33°C
(91°F)		 35°C
(95°F)		 32°C
(90°F)		 24°C
(75°F)		 18°C
(65°F)		 13°C
(55°F)
Mean maximum 11°C
(51°F)		 12°C
(53°F)		 16°C
(61°F)		 22°C
(72°F)		 25°C
(78°F)		 30°C
(86°F)		 30°C
(87°F)		 33°C
(92°F)		 29°C
(84°F)		 20°C
(69°F)		 14°C
(58°F)		 11°C
(51°F)
Average high 5°C
(42°F)		 5°C
(41°F)		 9°C
(48°F)		 12°C
(54°F)		 16°C
(62°F)		 19°C
(66°F)		 23°C
(73°F)		 24°C
(75°F)		 20°C
(68°F)		 13°C
(56°F)		 8°C
(47°F)		 5°C
(42°F)
Daily mean 2°C
(36°F)		 1°C
(35°F)		 4°C
(40°F)		 7°C
(45°F)		 11°C
(52°F)		 14°C
(57°F)		 17°C
(63°F)		 18°C
(64°F)		 14°C
(58°F)		 8°C
(47°F)		 5°C
(41°F)		 2°C
(37°F)
Average low -0°C
(32°F)		 -2°C
(29°F)		 0°C
(33°F)		 3°C
(37°F)		 6°C
(44°F)		 9°C
(48°F)		 11°C
(52°F)		 12°C
(53°F)		 9°C
(49°F)		 4°C
(40°F)		 2°C
(36°F)		 0°C
(32°F)
Mean minimum -9°C
(17°F)		 -11°C
(12°F)		 -6°C
(22°F)		 -3°C
(27°F)		 1°C
(34°F)		 4°C
(40°F)		 7°C
(45°F)		 7°C
(45°F)		 4°C
(40°F)		 -2°C
(29°F)		 -3°C
(27°F)		 -7°C
(20°F)
Minimum -18°C
(0°F)		 -18°C
(-0°F)		 -9°C
(16°F)		 -4°C
(25°F)		 0°C
(32°F)		 4°C
(39°F)		 6°C
(43°F)		 6°C
(44°F)		 3°C
(38°F)		 -4°C
(24°F)		 -4°C
(25°F)		 -10°C
(14°F)

Compare climate in Morton with other places

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

Monthly average precipitation in Morton, Washington, United States §

Morton usually has the most precipitation in February, November and December, with an average of 20 rainy days and 266 mm (10.5 inches) of precipitation per month.The driest months in Morton are June, July and August. On average, 44 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Morton, Washington, 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) 240 (9.4) 286 (11.3) 182 (7.2) 159 (6.3) 103 (4.1) 85 (3.3) 23 (0.9) 25 (1.0) 108 (4.3) 196 (7.7) 246 (9.7) 267 (10.5)
Average precipitation days (≥ 1 mm) 18 21 18 16 13 11 5 4 10 15 18 21

Monthly sunshine hours in Morton, Washington, United States §

The sunniest months in Morton are June, July and August, when the sun shines an average of 11 hours 17 minutes a day.Least sunny months in Morton: January, February and December receive an average of 3 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Morton, Washington, 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 79 112 193 224 300 322 377 339 262 197 115 98
Mean daily daylight hours 9h 2m 10h 20m 11h 57m 13h 37m 15h 2m 15h 45m 15h 21m 14h 4m 12h 28m 10h 49m 9h 22m 8h 37m

Solar UV radiation in Morton, Washington, United States §

Morton experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Morton UV Index data.

Average daily maximum UV levels by month for Morton, Washington, 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) 2 4 5 7 9 10 10 8 7 5 3 2