St. Augustine, FL weather in August
St. Augustine is hot and oppressively humid in August, with rain on most days: highs average 90°F and nights drop to about 74°F. Rain falls on about 15 days. This is the peak of the warm season in St. Augustine. Keep rain gear handy.
- Normal high
- 90°F
- Normal low
- 74°F
- Wet days
- 15
- 7.2 in total
- Muggy days
- 31
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 91°F | 89°F |
| Normal low | 74°F | 74°F |
| Chance of a wet day | 44% | 47% |
| Sunrise / sunset | 6:44 am / 8:18 pm | 7:01 am / 7:49 pm |
| Daylight | 13.6 h | 12.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical August day
- 6 am78°Fdew point 73°F
- 9 am83°Fdew point 74°F
- Noon88°Fdew point 72°F
- 3 pm89°Fdew point 72°F
- 6 pm85°Fdew point 72°F
- 9 pm81°Fdew point 73°F
NOAA hourly normals (local standard time) from Jacksonville NAS (32 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph17 of 31
- Hot dayshigh 90°F or more16 of 31
- Muggy daysdaily mean dew point 65°F or more31 of 31
- Wet daysat least 0.01 in of rain or melted snow15 of 31
- Notable rainat least 0.10 in11 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 7.2 in; a dry August brings about 4.7 in and a wet one about 9.0 in (25th and 75th percentiles). About 5 days bring half an inch or more, and about 3 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202007: average high 94°F
- Coolest August1996: average high 86°F
- Wettest August2008: 13.8 in
- Driest August1999: 2.0 in
- Highest reading101°F (August 1, 1999)
- Lowest reading67°F (August 10, 2003)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 91°F | 90°F | 87°F |
| Normal low | 74°F | 74°F | 73°F |
| Wet days | 12 | 15 | 14 |
| Comfortable days | 0 | 0 | 0 |
| Daylight | 13.8 h | 13.2 h | 12.3 h |
Highs change by -1°F from July and -3°F into September.
Nearby alternatives in August
- Drier: Charleston, SC215 mi · high 86°F · 12 wet days
How St. Augustine ranks in August
- Normal high131st warmest of 378 cities; 19th of 23 in Florida
- Wet days354th driest of 378
- Comfortable days288th most of 341
What to pack for St. Augustine in August
- Light, breathable clothing – highs near 90°F and about 31 muggy days
- A rain jacket or umbrella – rain on about 15 days
- A swimsuit – about 17 beach days
Heating and cooling
August has 0 heating degree days and 529 cooling degree days (base 65°F), 14% of the year's total heating and cooling demand.
Questions
How hot is St. Augustine in August?
The normal high is 90°F and the normal low is 74°F. From 1991 to 2020 the hottest August reading was 101°F (August 1, 1999).
Does it rain a lot in St. Augustine in August?
About 15 days in August have at least 0.01 in of precipitation, and the normal total is 7.2 in. The wettest August in 1991-2020 was in 2008 (13.8 in); the driest was in 1999 (2.0 in).
Is August a good time to visit St. Augustine?
August ranks 12th of 12 months on our comfort score for St. Augustine (36 out of 100). It has almost no comfortable days and about 16 days at 90°F or hotter. The best months are February, March and November.
Where the numbers come from
- Temperature, rain and frost dates: St Augustine Lighthouse (USC00087826), 1.7 mi ESE of the city center, 12 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Hastings 4NE (USC00083874), 13 mi SW of the city center, 10 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Jacksonville NAS (USW00093837), 32 mi NW of the city center, 20 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Jacksonville NAS (722065-93837), 32 mi NW of the city center, 20 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).