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Monthly climate in Port Saint John, Florida, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Port Saint John features a humid subtropical climate (Cfa).Temperatures typically range between 17 °C (64 °F) and 28 °C (82 °F) through the year, but rarely can drop to 2 °C (36 °F) or can rise to as high as 33 °C (91 °F).The average annual precipitation amounts to about 1289 mm (50.7 inches) and receives 165 rainy days on the 1 mm (0.04 inches) threshold annually.Port Saint John enjoys an average of 3553 hours of sunshine throughout the year, and daylight varies from 10 hours 21 minutes to 13 hours 54 minutes per day.

Monthly average temperatures in Port Saint John, Florida, United States §

The warmest months in Port Saint John are July, August and September, with daily mean temperatures ranging from 27 to 28 °C (81 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 17 to 19 °C (64 - 67 °F) throughout the day. On average each year, Port Saint John experiences 190 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Port Saint John, 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)		 27°C
(81°F)		 29°C
(84°F)		 30°C
(87°F)		 31°C
(88°F)		 32°C
(89°F)		 32°C
(90°F)		 32°C
(90°F)		 33°C
(91°F)		 30°C
(87°F)		 29°C
(85°F)		 27°C
(80°F)
Mean maximum 26°C
(78°F)		 26°C
(79°F)		 27°C
(81°F)		 29°C
(84°F)		 30°C
(86°F)		 30°C
(87°F)		 32°C
(89°F)		 32°C
(89°F)		 31°C
(89°F)		 30°C
(86°F)		 27°C
(81°F)		 26°C
(79°F)
Average high 20°C
(68°F)		 22°C
(72°F)		 23°C
(73°F)		 25°C
(77°F)		 27°C
(81°F)		 28°C
(84°F)		 30°C
(85°F)		 30°C
(86°F)		 29°C
(85°F)		 27°C
(82°F)		 24°C
(75°F)		 22°C
(71°F)
Daily mean 17°C
(64°F)		 19°C
(67°F)		 20°C
(69°F)		 23°C
(73°F)		 25°C
(77°F)		 26°C
(80°F)		 27°C
(82°F)		 28°C
(82°F)		 27°C
(81°F)		 26°C
(78°F)		 22°C
(71°F)		 19°C
(66°F)
Average low 15°C
(59°F)		 17°C
(63°F)		 18°C
(64°F)		 20°C
(69°F)		 23°C
(73°F)		 25°C
(77°F)		 26°C
(78°F)		 26°C
(79°F)		 26°C
(78°F)		 24°C
(76°F)		 20°C
(68°F)		 16°C
(62°F)
Mean minimum 6°C
(43°F)		 9°C
(49°F)		 10°C
(50°F)		 15°C
(59°F)		 19°C
(67°F)		 23°C
(74°F)		 24°C
(76°F)		 25°C
(77°F)		 24°C
(75°F)		 18°C
(64°F)		 13°C
(56°F)		 8°C
(47°F)
Minimum 2°C
(36°F)		 6°C
(43°F)		 8°C
(47°F)		 13°C
(55°F)		 16°C
(61°F)		 23°C
(73°F)		 24°C
(75°F)		 24°C
(76°F)		 23°C
(74°F)		 11°C
(52°F)		 7°C
(46°F)		 6°C
(42°F)

Compare climate in Port Saint John with other places

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

Monthly average precipitation in Port Saint John, Florida, United States §

Port Saint John usually has the most precipitation in July, August and September, with an average of 23 rainy days and 194 mm (7.6 inches) of precipitation per month.The driest months in Port Saint John are January, February and March. On average, 38 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Port Saint John, 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) 38 (1.5) 51 (2.0) 25 (1.0) 72 (2.8) 124 (4.9) 164 (6.4) 172 (6.8) 220 (8.7) 189 (7.4) 107 (4.2) 62 (2.4) 65 (2.6)
Average precipitation days (≥ 1 mm) 5 8 4 8 11 22 24 26 21 18 10 8

Monthly sunshine hours in Port Saint John, Florida, United States §

The sunniest months in Port Saint John are May, July and August, when the sun shines an average of 10 hours 43 minutes a day.Least sunny months in Port Saint John: January, February and November receive an average of 8 hours 9 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Port Saint John, 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 211 260 316 314 321 309 340 336 312 300 261 269
Mean daily daylight hours 10h 33m 11h 11m 12h 0m 12h 51m 13h 33m 13h 54m 13h 43m 13h 5m 12h 17m 11h 26m 10h 43m 10h 21m

Solar UV radiation in Port Saint John, Florida, United States §

Port Saint John experiences the highest level of ultraviolet (UV) radiation in April, June and July, 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 7. For more detailed information, check out our hourly Port Saint John UV Index data.

Average daily maximum UV levels by month for Port Saint John, 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) 6 8 9 11 11 12 12 11 11 9 7 5