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Monthly climate in Gretna, Florida, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Gretna features a humid subtropical climate (Cfa).Temperatures typically range between 12 °C (54 °F) and 27 °C (81 °F) through the year, but rarely can drop to -6 °C (22 °F) or can rise to as high as 37 °C (100 °F).The average annual precipitation amounts to about 1363 mm (53.7 inches) and receives 140 rainy days on the 1 mm (0.04 inches) threshold annually.Gretna enjoys an average of 3350 hours of sunshine throughout the year, and daylight varies from 10 hours 11 minutes to 14 hours 4 minutes per day.

Monthly average temperatures in Gretna, Florida, United States §

The warmest months in Gretna are June, July and August, with daily mean temperatures ranging from 26 to 27 °C (80 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 12 to 15 °C (54 - 60 °F) throughout the day. On average each year, Gretna experiences 202 days above 25 °C (77.0 °F) and 6 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Gretna, Florida, 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
(82°F)		 28°C
(82°F)		 32°C
(90°F)		 33°C
(91°F)		 37°C
(99°F)		 37°C
(99°F)		 35°C
(96°F)		 36°C
(97°F)		 37°C
(100°F)		 36°C
(97°F)		 29°C
(85°F)		 27°C
(82°F)
Mean maximum 26°C
(79°F)		 27°C
(82°F)		 30°C
(86°F)		 32°C
(89°F)		 34°C
(94°F)		 35°C
(95°F)		 35°C
(95°F)		 35°C
(95°F)		 35°C
(95°F)		 33°C
(92°F)		 28°C
(83°F)		 26°C
(79°F)
Average high 18°C
(64°F)		 21°C
(70°F)		 24°C
(75°F)		 26°C
(79°F)		 30°C
(86°F)		 31°C
(89°F)		 32°C
(90°F)		 32°C
(90°F)		 31°C
(88°F)		 28°C
(83°F)		 22°C
(72°F)		 19°C
(67°F)
Daily mean 12°C
(54°F)		 15°C
(60°F)		 17°C
(63°F)		 20°C
(68°F)		 24°C
(76°F)		 26°C
(80°F)		 27°C
(81°F)		 27°C
(81°F)		 26°C
(79°F)		 23°C
(73°F)		 16°C
(60°F)		 13°C
(56°F)
Average low 7°C
(45°F)		 10°C
(50°F)		 12°C
(53°F)		 14°C
(57°F)		 19°C
(66°F)		 23°C
(73°F)		 23°C
(74°F)		 23°C
(74°F)		 22°C
(72°F)		 18°C
(65°F)		 10°C
(51°F)		 9°C
(48°F)
Mean minimum -3°C
(27°F)		 0°C
(32°F)		 1°C
(34°F)		 6°C
(43°F)		 12°C
(54°F)		 19°C
(66°F)		 22°C
(71°F)		 21°C
(70°F)		 17°C
(62°F)		 8°C
(48°F)		 2°C
(36°F)		 -1°C
(30°F)
Minimum -6°C
(22°F)		 -1°C
(31°F)		 -0°C
(31°F)		 4°C
(39°F)		 9°C
(48°F)		 17°C
(62°F)		 20°C
(69°F)		 19°C
(66°F)		 14°C
(57°F)		 4°C
(39°F)		 -1°C
(31°F)		 -3°C
(26°F)

Compare climate in Gretna with other places

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

Monthly average precipitation in Gretna, Florida, United States §

Gretna usually has the most precipitation in June, July and August, with an average of 20 rainy days and 170 mm (6.7 inches) of precipitation per month.The driest months in Gretna are January, March and November. On average, 61 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Gretna, Florida, 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) 82 (3.2) 116 (4.6) 57 (2.2) 101 (4.0) 87 (3.4) 176 (6.9) 169 (6.6) 165 (6.5) 140 (5.5) 99 (3.9) 46 (1.8) 126 (5.0)
Average precipitation days (≥ 1 mm) 7 9 6 8 10 17 23 22 13 9 7 9

Monthly sunshine hours in Gretna, Florida, United States §

The sunniest months in Gretna are May, July and August, when the sun shines an average of 10 hours 22 minutes a day.Least sunny months in Gretna: January, February and December receive an average of 6 hours 58 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Gretna, Florida, 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 196 213 295 301 330 302 325 309 298 294 258 225
Mean daily daylight hours 10h 24m 11h 6m 12h 0m 12h 55m 13h 42m 14h 4m 13h 52m 13h 11m 12h 18m 11h 23m 10h 35m 10h 11m

Solar UV radiation in Gretna, Florida, United States §

Gretna experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 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 Gretna UV Index data.

Average daily maximum UV levels by month for Gretna, Florida, 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 10 11 11 12 11 10 8 6 4