Weather in Nassau County

Calculated from weather data of Jacksonville International Airport (KJAX) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	67.0	66.0	72.0	64.0	66.0	70.0
February	73.0	70.0	79.0	71.0	69.0	71.0
March	76.0	75.0	78.0	76.0	74.0	82.0
April	80.0	80.0	81.0	79.0	78.0	81.0
May	86.0		84.0	85.0	84.0	85.0
June	89.0		89.0	90.0	87.0	88.0
July	91.0		94.0	92.0	88.0	91.0
August	90.0		93.0	90.0	89.0	90.0
September	87.0		87.0	86.0	86.0	86.0
October	82.0		80.0	80.0	81.0	82.0
November	73.0		71.0	74.0	69.0	76.0
December	69.0		67.0	71.0	74.0	65.0
Average	79.0	73.0	81.0	80.0	79.0	81.0

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	45.0	45	46	43	45	49
February	51.0	46	54	48	48	51
March	53.0	56	54	54	53	58
April	58.0	57	61	58	56	61
May	65.0		65	66	61	64
June	72.0		71	71	71	71
July	74.0		75	73	73	73
August	74.0		76	73	74	74
September	71.0		69	70	69	72
October	64.0		61	58	62	67
November	54.0		52	58	48	60
December	49.0		50	52	53	42
Average	60.0	51.0	61.0	61.0	60.0	62.0

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
86 °F or warmer	5	121	117	97	124
77 °F or warmer	43	254	239	232	250
68 °F or warmer	86	312	295	300	313
32 °F or colder	2	3	4	4	5

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	3.5	4	1	3	3	3
February	6.5	10	3	10	8	8
March	4.7	6	4	10	7	1
April	3.7	3	10	0	4	5
May	2.9		5	1	2	3
June	4.4		4	2	5	6
July	3.5		4	4	4	4
August	3.2		3	3	5	3
September	5.2		3	7	4	7
October	3.9		2	1	3	7
November	5.2		11	5	7	6
December	6.9		10	4	3	2
Average	4.5	5.5	4.9	4.0	4.5	4.5

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (miles per hour)

Month	Average	2024	2023	2022	2021	2020
January	9.3	9	8	10	9	10
February	9.3	10	10	9	9	10
March	9.8	9	10	10	10	9
April	9.8	9	10	10	9	10
May	8.9		9	8	10	9
June	8.0		9	8	8	7
July	7.1		8	7	8	8
August	7.0		8	6	7	7
September	8.6		8	8	7	9
October	8.7		9	7	7	9
November	8.8		9	10	8	10
December	8.3		9	7	7	8
Average	8.7	9.2	8.9	8.3	8.3	8.7

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	W	W	NW	W	N
February	N	W	NE	NW	W
March	NE	SW	SW	NE	SW
April	S	E	E	S	SW
May		NE	SE	E	E
June		SW	E	SE	NE
July		SW	S	S	S
August		SE	SE	SE	SE
September		NE	NE	E	NE
October		N	N	NE	NE
November		N	NE	N	NE
December		N	NE	W	W

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Nassau County weather Q&A

What is the warmest month in Nassau County?

The warmest month is July with an average temperature of 91 °F over the past years.

What is the coldest month in Nassau County?

The coldest month is January with an average daytime temperature of 67 °F in the past few years.

Which month is the wettest in Nassau County?

Chance of precipitation is the highest in December with a probability of around 7.0 %.

Which month is the driest in Nassau County?

The least rainfall and snow can be expected in May. The probability is about 2.9 %.