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Monthly climate in Marietta, Oklahoma, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Marietta features a humid subtropical climate (Cfa). Temperatures typically range between 6 °C (44 °F) and 29 °C (84 °F) through the year, but rarely can drop to -20 °C (-5 °F) or can rise to as high as 41 °C (107 °F). The average annual precipitation amounts to about 1050 mm (41.3 inches) and receives 94 rainy days on the 1 mm (0.04 inches) threshold annually. Marietta enjoys an average of 3195 hours of sunshine throughout the year, and daylight varies from 9 hours 55 minutes to 14 hours 21 minutes per day.

Monthly average temperatures in Marietta, Oklahoma, United States §

The warmest months in Marietta are June, July and August, with daily mean temperatures ranging from 27 to 29 °C (80 - 84 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 6 to 9 °C (44 - 49 °F) throughout the day. On average each year, Marietta experiences 153 days above 25 °C (77.0 °F) and 30 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Marietta, Oklahoma, 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 25°C
(77°F)		 29°C
(85°F)		 31°C
(88°F)		 33°C
(92°F)		 35°C
(96°F)		 37°C
(99°F)		 41°C
(107°F)		 39°C
(103°F)		 36°C
(97°F)		 33°C
(92°F)		 30°C
(86°F)		 26°C
(79°F)
Mean maximum 22°C
(72°F)		 25°C
(78°F)		 28°C
(82°F)		 30°C
(86°F)		 33°C
(92°F)		 35°C
(95°F)		 38°C
(100°F)		 37°C
(99°F)		 35°C
(94°F)		 32°C
(90°F)		 26°C
(79°F)		 23°C
(74°F)
Average high 12°C
(54°F)		 13°C
(56°F)		 20°C
(68°F)		 23°C
(73°F)		 27°C
(81°F)		 31°C
(89°F)		 34°C
(93°F)		 33°C
(92°F)		 30°C
(86°F)		 24°C
(76°F)		 18°C
(65°F)		 15°C
(59°F)
Daily mean 6°C
(44°F)		 8°C
(46°F)		 14°C
(58°F)		 17°C
(63°F)		 22°C
(73°F)		 27°C
(80°F)		 29°C
(84°F)		 28°C
(83°F)		 25°C
(77°F)		 18°C
(65°F)		 12°C
(54°F)		 9°C
(49°F)
Average low 1°C
(35°F)		 3°C
(37°F)		 9°C
(48°F)		 12°C
(53°F)		 18°C
(64°F)		 22°C
(72°F)		 24°C
(75°F)		 23°C
(74°F)		 20°C
(69°F)		 13°C
(56°F)		 7°C
(44°F)		 4°C
(40°F)
Mean minimum -8°C
(18°F)		 -8°C
(18°F)		 -0°C
(31°F)		 2°C
(37°F)		 10°C
(49°F)		 18°C
(65°F)		 20°C
(69°F)		 19°C
(67°F)		 13°C
(56°F)		 3°C
(37°F)		 -2°C
(29°F)		 -4°C
(25°F)
Minimum -14°C
(7°F)		 -20°C
(-5°F)		 -8°C
(18°F)		 -1°C
(30°F)		 7°C
(45°F)		 16°C
(60°F)		 18°C
(64°F)		 19°C
(66°F)		 9°C
(49°F)		 1°C
(33°F)		 -6°C
(21°F)		 -7°C
(19°F)

Compare climate in Marietta with other places

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

Monthly average precipitation in Marietta, Oklahoma, United States §

Marietta usually has the most precipitation in May, June and October, with an average of 9 rainy days and 121 mm (4.8 inches) of precipitation per month. The driest months in Marietta are July, November and December. On average, 52 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Marietta, Oklahoma, 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) 61 (2.4) 84 (3.3) 95 (3.7) 96 (3.8) 122 (4.8) 103 (4.1) 48 (1.9) 94 (3.7) 102 (4.0) 138 (5.4) 50 (2.0) 57 (2.2)
Average precipitation days (≥ 1 mm) 6 9 10 9 12 8 6 7 7 8 6 6

Monthly sunshine hours in Marietta, Oklahoma, United States §

The sunniest months in Marietta are June, July and August, when the sun shines an average of 11 hours 14 minutes a day. Least sunny months in Marietta: January, February and December receive an average of 6 hours 27 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Marietta, Oklahoma, 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 174 183 244 259 292 342 360 330 281 263 232 229
Mean daily daylight hours 10h 10m 10h 58m 11h 59m 13h 2m 13h 55m 14h 21m 14h 7m 13h 20m 12h 20m 11h 17m 10h 22m 9h 55m

Solar UV radiation in Marietta, Oklahoma, United States §

Marietta experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure. January, February 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 Marietta UV Index data.

Average daily maximum UV levels by month for Marietta, Oklahoma, 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) 4 6 8 10 11 11 11 11 10 8 6 4

Detailed Monthly Weather Insights for Marietta, Oklahoma, United States

Discover in-depth weather details for every month in Marietta. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Marietta's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.