Climate - Jacksonville (Florida)

The climate of Jacksonville is subtropical, with mild winters (though characterized by short cold waves) and hot, humid summers, during which there are quite frequent thunderstorms.
The city is located in northeastern Florida, near the Atlantic coast, on the banks of the St. Johns River.
The average temperature of the coldest month (January) is of 12.3 °C (54.2 °F), that of the warmest month (July) is of 28.1 °C (82.5 °F). Here are the average temperatures.

Precipitation amounts to 1,355 millimeters (53.4 inches) per year: it is therefore quite abundant. It ranges from 50 mm (2 in) in the driest month (November) to 195 mm (7.7 in) in the wettest (June). Here is the average precipitation.

The winter, from December to February, is mild, but it is much colder than in South Florida and Miami.
The sun often shines, although there are periods characterized by clouds, rain and wind.
Normally the days are mild, but at night it is often cold, and the temperature can approach the freezing point.
There may be warm periods even in the middle of winter, when the temperature can reach or exceed 25 °C (77 °F).
However, there may also be short cold spells, in which the temperature drops below freezing, usually down to -5/-6 °C (21/23 °F), while during the day it remains about 5/6 °C (41/43 °F).
The record is -14 °C (7 °F), set in January 1985.
Snow in Jacksonville is very rare. Occasionally, a light snowfall can be observed, but it takes decades to see the city in white. The snowfall of 23 December 1989 remains historic, also because the snow lasted until Christmas.

The summer, from June to September, is hot and muggy. Due to high humidity the heat is sweltering, even though the breeze blows from the sea. The combination of humidity and temperature can produce a perceived temperature of 40 °C (104 °F) and above.
On the hottest days of the year, the temperature usually reaches 37/38 °C (99/100 °F). In recent decades, the record is 39.5 °C (103 °F), set in July 1981.
The sun often shines, but the sky is not always clear, as cloud coverings can form, which can give rise to thunderstorms.
Between late summer and early autumn, Jacksonville can be affected by hurricanes or tropical storms. Hurricane season runs from June to November, although the period in which they are most likely is from August to October. Indeed, the city has been hit several times over the past few decades, albeit not in a destructive way. Hurricanes can cause extensive damage, especially along the coast.

Spring and autumn, from March to May and from early October to late November, are pleasantly warm seasons, with infrequent rains. Spring is the sunniest season.
Sometimes there can be some bursts of cold air, especially in March and November, which generally bring a bit of cold especially at night.
In April and October it can exceed 30 °C (86 °F), while in May there is already often summer-like heat.



On average, there are around 2,880 sunshine hours per year. Here are the average sunshine hours per day.

The sea temperature ranges between 20 °C (68 °F) and 28.5 °C (83 °F). The sea is warm enough for swimming from May to November. In winter the sea is very cool, if not cold, although it is not impossible to swim in. Here are the average sea temperatures.

Occasionally, Jacksonville can be hit by a tornado. Tornadoes are more likely in spring, and somewhat less in autumn, but in these southern latitudes, they can also occur in January and February.

Best Time

To visit Jacksonville you can choose the period from mid-March to mid-April.
To go to the beach, the weather in May is generally excellent, with fewer thunderstorms than in summer, however, it can sometimes get a little cold at night.

See also the climate of Florida.

Jacksonville - Weather by month

Based on the period 1991-2020

---

In January, the coldest month of the year, the weather in Jacksonville is usually mild. The average temperature is of 12.3 °C (54 °F), with a minimum of 6.1 °C (42.9 °F) and a maximum of 18.6 °C (65.5 °F).
On the coldest nights of the month, the temperature usually drops to around -3.5 °C (25.5 °F). However, it dropped to -7.2 °C (19 °F) in January 2003.
On the warmest days of the month, the temperature usually reaches around 27 °C (80.5 °F). However, it reached 29.4 °C (84.9 °F) in January 2013.
Precipitation amounts to 85 mm (3.3 in), distributed over 8 days.
The day lasts on average 10 hours and 25 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 20.5 °C (68.5 °F). Therefore, the sea is cool for swimming.

---

In February, the weather in Jacksonville is usually mild. The average temperature is of 14.2 °C (57 °F), with a minimum of 7.8 °C (46.1 °F) and a maximum of 20.5 °C (68.9 °F).
On the coldest nights of the month, the temperature usually drops to around -2 °C (28 °F). However, it dropped to -7.3 °C (18.9 °F) in February 1996.
On the warmest days of the month, the temperature usually reaches around 28.5 °C (83 °F). However, it reached 31.7 °C (89.1 °F) in February 2020.
Precipitation amounts to 75 mm (3 in), distributed over 8 days.
The day lasts on average 11 hours and 5 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 20 °C (67.5 °F). Therefore, the sea is very cool for swimming.

---

In March, the weather in Jacksonville is usually very mild. However, there are remarkable differences between night and day. The average temperature is of 16.9 °C (62 °F), with a minimum of 10.3 °C (50.6 °F) and a maximum of 23.5 °C (74.3 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 0 °C (32.5 °F). However, it dropped to -3.9 °C (25 °F) in March 2002.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 30 °C (86.5 °F). However, it reached 34.4 °C (93.9 °F) in March 2020.
Precipitation amounts to 85 mm (3.3 in), distributed over 8 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 69% of the time.
The average humidity is 69%.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 20 °C (67.5 °F). Therefore, the sea is very cool for swimming.

---

In April, the weather in Jacksonville is usually warm. However, there are remarkable differences between night and day. The average temperature is of 20.1 °C (68 °F), with a minimum of 13.6 °C (56.4 °F) and a maximum of 26.6 °C (79.8 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 5 °C (41 °F). However, it dropped to -0.6 °C (30.9 °F) in April 2007.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 32 °C (89.5 °F). However, it reached 34.4 °C (93.9 °F) in April 1991.
Precipitation amounts to 75 mm (3 in), distributed over 6 days.
The day lasts on average 13 hours and 0 minutes.
There are on average 9.5 hours of sunshine per day. So, the sun shines 73% of the time.
The average humidity is 69%.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 21 °C (70 °F). Therefore, the sea is cool for swimming.

---

In May, the weather in Jacksonville is usually warm to hot and muggy. The average temperature is of 23.8 °C (75 °F), with a minimum of 17.7 °C (63.9 °F) and a maximum of 29.9 °C (85.9 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 10.5 °C (50.5 °F). However, it dropped to 7.2 °C (45 °F) in May 1992.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 34.5 °C (94 °F). However, it reached 37.8 °C (100 °F) in May 2019.
Precipitation amounts to 85 mm (3.3 in), distributed over 7 days.
The day lasts on average 13 hours and 40 minutes.
There are on average 10 hours of sunshine per day. So, the sun shines 72% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 24 °C (75.5 °F). Therefore, the sea is warm enough for swimming.

---

In June, the weather in Jacksonville is usually warm to hot and muggy. The average temperature is of 26.8 °C (80 °F), with a minimum of 21.5 °C (70.7 °F) and a maximum of 32.2 °C (89.9 °F).
On the coldest nights, the temperature usually drops to around 17 °C (62.5 °F). However, it dropped to 13.8 °C (56.8 °F) in June 1995.
On the warmest days, the temperature usually reaches around 36 °C (97 °F). However, it reached 38.9 °C (102 °F) in June 2010.
Precipitation amounts to 195 mm (7.7 in), distributed over 14 days.
The day lasts on average 14 hours and 5 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 9.5 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 27 °C (80.5 °F). Therefore, the sea is pleasantly warm and allows long swims.

---

In July, the warmest month of the year, the weather in Jacksonville is usually very hot and muggy. The average temperature is of 28.1 °C (83 °F), with a minimum of 22.9 °C (73.2 °F) and a maximum of 33.3 °C (91.9 °F).
On the coldest nights of the month, the temperature usually drops to around 20 °C (68 °F). However, it dropped to 17.2 °C (63 °F) in July 2000.
On the warmest days of the month, the temperature usually reaches around 36.5 °C (97.5 °F). However, it reached 39.4 °C (102.9 °F) in July 2000.
Precipitation amounts to 170 mm (6.7 in), distributed over 14 days.
The day lasts on average 13 hours and 55 minutes.
There are on average 9 hours of sunshine per day. So, the sun shines 65% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 9 kph (6 mph).
The average sea temperature is of 28.5 °C (83 °F). Therefore, the sea is pleasantly warm and allows long swims.

---

In August, the weather in Jacksonville is usually very hot and muggy. The average temperature is of 27.8 °C (82 °F), with a minimum of 23 °C (73.4 °F) and a maximum of 32.7 °C (90.8 °F).
On the coldest nights of the month, the temperature usually drops to around 20 °C (68 °F). However, it dropped to 17.2 °C (63 °F) in August 2002.
On the warmest days of the month, the temperature usually reaches around 35.5 °C (96 °F). However, it reached 38.9 °C (102 °F) in August 1999.
Precipitation amounts to 175 mm (6.9 in), distributed over 15 days.
The day lasts on average 13 hours and 10 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 9 kph (6 mph).
The average sea temperature is of 28.5 °C (83.5 °F). Therefore, the sea is pleasantly warm and allows long swims.

---

In September, the weather in Jacksonville is usually warm to hot and muggy. The average temperature is of 26.0 °C (79 °F), with a minimum of 21.4 °C (70.5 °F) and a maximum of 30.7 °C (87.2 °F).
On the coldest nights, the temperature usually drops to around 16 °C (60.5 °F). However, it dropped to 11.1 °C (52 °F) in September 2009.
On the warmest days, the temperature usually reaches around 34 °C (93.5 °F). However, it reached 36.7 °C (98.1 °F) in September 1999.
Precipitation amounts to 190 mm (7.5 in), distributed over 12 days.
The day lasts on average 12 hours and 20 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 28 °C (82 °F). Therefore, the sea is pleasantly warm and allows long swims.

---

In October, the weather in Jacksonville is usually warm. The average temperature is of 21.8 °C (71 °F), with a minimum of 16.4 °C (61.5 °F) and a maximum of 27.2 °C (80.9 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 7.5 °C (45 °F). However, it dropped to 0.6 °C (33.1 °F) in October 2008.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 32 °C (89.5 °F). However, it reached 34.4 °C (93.9 °F) in October 2018.
Precipitation amounts to 100 mm (3.9 in), distributed over 8 days.
The day lasts on average 11 hours and 25 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 61% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 25.5 °C (78.5 °F). Therefore, the sea is warm enough for swimming.

---

In November, the weather in Jacksonville is usually very mild. The average temperature is of 16.8 °C (62 °F), with a minimum of 10.7 °C (51.3 °F) and a maximum of 22.9 °C (73.2 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 0.5 °C (33 °F). However, it dropped to -4.4 °C (24.1 °F) in November 2014.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 29.5 °C (85 °F). However, it reached 30.6 °C (87.1 °F) in November 2018.
Precipitation amounts to 50 mm (2 in), distributed over 7 days.
The day lasts on average 10 hours and 35 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 61% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 23 °C (73.5 °F). Therefore, the sea can be considered barely acceptable for swimming.

---

In December, the weather in Jacksonville is usually mild. The average temperature is of 13.7 °C (57 °F), with a minimum of 7.7 °C (45.8 °F) and a maximum of 19.7 °C (67.5 °F).
On the coldest nights of the month, the temperature usually drops to around -1.5 °C (29.5 °F). However, it dropped to -6.7 °C (19.9 °F) in December 2010.
On the warmest days of the month, the temperature usually reaches around 27.5 °C (81.5 °F). However, it reached 29.4 °C (84.9 °F) in December 2015.
Precipitation amounts to 70 mm (2.8 in), distributed over 8 days.
The day lasts on average 10 hours and 10 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 6 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 21.5 °C (71 °F). Therefore, the sea is cool for swimming.