Jacksonville climate — normals and trends
Jacksonville (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.9 °C and it receives 1,315 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (26.0 °C on average) and the coldest is January (7.1 °C). Rainfall peaks in July.
Jacksonville averages 33 frost days, 61 hot days (≥ 30 °C) and 137 rainy days per year.
Jacksonville has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 39.6 °C (on 27 June 1954) and the coldest -18.4 °C (on 25 December 1989).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
JacksonvilleNorth Carolina
- coords
- 34.75°, -77.43°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.9°C
Average daily high
22.2°C
Average daily low
12.4°C
Annual rainfall
1,315mm
Sunshine / day
9.3h
Mean relative humidity
75%
Average peak wind
15.4km/h
Seasonal range
18.9°C
Frost days (< 0 °C)
33 d/yr
Hot days (≥ 30 °C)
61 d/yr
Rainy days (≥ 1 mm)
137 d/yr
Annual snowfall
5.3 cm
Average feels-like high
22.9 °C
Average feels-like low
11.6 °C
Average peak gust
35.9 km/h
Tropical nights (≥ 20 °C)
94 d/yr
Solar radiation
15.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.15 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
39.6 °C
27 June 1954
Coldest day
-18.4 °C
25 December 1989
Wettest day
325 mm
14 September 2018
Windiest day
68.6 km/h
5 September 1996
Strongest gust
163.4 km/h
6 September 1996
Hottest feels-like
45.3 °C
9 July 1977
Coldest feels-like
-23.5 °C
25 December 1989
Snowiest day
24.9 cm
10 February 1973
Sunniest day
14.0 h
6 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 9.7 °C | -2.8 °C | 60 mm | -30 mm |
| Feb | 15.7 °C | +1.6 °C | 42 mm | -45 mm |
| Mar | 20.6 °C | +2.8 °C | 100 mm | +4 mm |
| Apr | 25.0 °C | +2.6 °C | 51 mm | -27 mm |
| May | 26.9 °C | +0.7 °C | 180 mm | +77 mm |
| Jun | 30.7 °C | +1.3 °C | 171 mm | +39 mm |
| Jul | 31.9 °C | +1.3 °C | 170 mm | -1 mm |
| Aug | 28.9 °C | -1.1 °C | 170 mm | -2 mm |
| Sep | 27.7 °C | 0.0 °C | 50 mm | -88 mm |
| Oct | 22.2 °C | -0.9 °C | 99 mm | +12 mm |
| Nov | 19.6 °C | +1.2 °C | 22 mm | -56 mm |
| Dec | 13.4 °C | -0.6 °C | 99 mm | +14 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Jacksonville?
Jacksonville has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.9 °C and it receives 1,315 mm of precipitation per year.
What is the hottest day ever recorded in Jacksonville?
The hottest day measured in Jacksonville between 1940 and 2025 was 27 June 1954, reaching 39.6 °C.
What is the coldest day in Jacksonville?
The coldest day measured in Jacksonville between 1940 and 2025 was 25 December 1989, at -18.4 °C.
Does it snow in Jacksonville?
Yes. Jacksonville gets on average 5.3 cm of snow per year and has around 33 frost days.
Has the climate of Jacksonville warmed?
Yes: Jacksonville warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jacksonville?
The wettest day measured in Jacksonville between 1940 and 2025 was 14 September 2018, with 325 mm of rain in 24 hours.
What was the windiest day in Jacksonville?
The windiest day measured in Jacksonville between 1940 and 2025 was 5 September 1996, with winds reaching 68.6 km/h.
What is the warmest month in Jacksonville?
The warmest month in Jacksonville is July (26.0 °C on average); the coldest is January (7.1 °C).
How much does it rain in Jacksonville?
Jacksonville receives on average 1,315 mm of precipitation per year, spread over about 137 rainy days.
Is it sunny in Jacksonville?
Jacksonville gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.
What is the biggest single-day snowfall in Jacksonville?
The heaviest 24-hour snowfall measured in Jacksonville between 1940 and 2025 was 10 February 1973, with 24.9 cm.
Are there tropical nights in Jacksonville?
Yes: Jacksonville has on average 94 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Jacksonville?
In Jacksonville, between 1940 and 2025, the highest apparent temperature reached 45.3 °C on 9 July 1977, and the lowest was -23.5 °C on 25 December 1989.
Compare Jacksonville with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Jacksonville