St. Augustine FL Average Temperatures by Month

The numbers here tell you how hot and cold the weather usually is in St. Augustine, Florida during each month of the year.

The average high and low temperatures are listed below monthly and annually for the Atlantic coast city, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 70, 80 or 90 °F each month in St. Augustine, scroll down farther. There are also monthly and yearly counts of days with cool weather.

The first set of high and low temperatures are averages for 2003 to 2012. Everything else here is based on 1991 to 2020 weather.

10-year temperature averages for St. Augustine, 2003 to 2012
High °F	Low °F		High °C	Low °C
68	48	January	20	9
70	50	February	21	10
74	55	March	24	13
80	61	April	27	16
85	67	May	30	20
89	72	June	31	22
91	74	July	33	23
90	74	August	32	23
87	73	September	31	23
82	67	October	28	19
75	58	November	24	14
69	51	December	21	11
80	62	Year	27	17

30-year temperature averages for St. Augustine, 1991 to 2020
High °F	Low °F		High °C	Low °C
67	46	January	19	8
70	49	February	21	9
74	53	March	23	12
79	59	April	26	15
85	66	May	29	19
89	71	June	31	22
91	73	July	33	23
90	73	August	32	23
87	72	September	31	22
82	65	October	28	18
75	57	November	24	14
69	49	December	20	10
80	61	Year	26	16

Days of Hot Weather in St. Augustine

The hottest temperatures at St. Augustine are usually in the 90s Fahrenheit. Only once every two years on average the thermometer does rise into the 100s (over 38 °C).

The 90-degree weather can show up here as early as March and as late as October. About half of summer days have highs in the 90s.

Days per month in St. Augustine of at least 70, 80 or 90 °F
	70 °F 21 °C	80 °F 27 °C	90 °F 32 °C
January	13	1	0
February	14	3	0
March	24	7	0
April	29	15	1
May	31	26	5
June	30	29	12
July	31	31	19
August	31	31	16
September	30	29	8
October	31	21	1
November	23	7	0
December	15	2	0
Year	302	202	62

How Often St. Augustine Has Cold Temperatures

Five nights a winter at St. Augustine cool to freezing temperatures. But it normally does not get colder than 20 °F (-8 °C).

A night with frosty air can happen anytime from November to March, but is most common in January. Even after a crisp night in the city, everything thaws out during the day.

Days per month on average in St. Augustine when the minimum temperature drops to 50, 40 or 32 °F or lower
	32 °F 0 °C	40 °F 4 °C	50 °F 10 °C
January	2	8	18
February	1	5	14
March	0	2	10
April	0	0	3
May	0	0	0
June	0	0	0
July	0	0	0
August	0	0	0
September	0	0	0
October	0	0	1
November	0	2	8
December	1	6	15
Year	5	22	69

St. Augustine Temperatures: Averages by Month

Days of Hot Weather in St. Augustine

How Often St. Augustine Has Cold Temperatures

References

More on Weather in Florida