St. Augustine, Florida climate: Normal weather by month, frost dates and records
St. Augustine's normal year runs from 48°F January nights to 91°F July afternoons, with 50.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 21.8°C, January lows of 9°C, July highs of 33°C, 1,286 mm of precipitation a year.
- NOAA stationSt Augustine Lighthouse
- Station IDUSC00087826
- Location29.89°N 81.29°W
- Elevation12 ft (4 m)
- Population16,033
On October 14, the normal high in St. Augustine is 82°F and the normal low 67°F, and the chance of measurable rain or snow is 32%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for St. Augustine.
- Jan 68° 48°
- Feb 70° 50°
- Mar 74° 55°
- Apr 80° 61°
- May 85° 67°
- Jun 89° 72°
- Jul 91° 74°
- Aug 90° 74°
- Sep 87° 73°
- Oct 82° 67°
- Nov 75° 58°
- Dec 69° 51°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in St. Augustine each month?
July is the warmest month, with normal highs of 91°F; January the coldest, with normal lows of 48°F. The most precipitation falls in August (7.18 in), the least in November (2.32 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 68°F | 48°F | 57.6°F | 2.74 | 9 | <1 | 2 | 10 h 30 min |
| February | 70°F | 50°F | 60.0°F | 2.69 | 8 | <1 | 1 | 11 h 10 min |
| March | 74°F | 55°F | 64.5°F | 3.43 | 9 | <1 | <1 | 12 h |
| April | 80°F | 61°F | 70.2°F | 2.93 | 7 | 1 | <1 | 12 h 50 min |
| May | 85°F | 67°F | 76.3°F | 3.66 | 7 | 5 | <1 | 13 h 40 min |
| June | 89°F | 72°F | 80.4°F | 6.27 | 12 | 12 | <1 | 14 h |
| July | 91°F | 74°F | 82.4°F | 4.88 | 12 | 19 | <1 | 13 h 50 min |
| August | 90°F | 74°F | 82.1°F | 7.18 | 15 | 16 | <1 | 13 h 20 min |
| September | 87°F | 73°F | 80.3°F | 7.18 | 14 | 8 | <1 | 12 h 20 min |
| October | 82°F | 67°F | 74.2°F | 4.37 | 9 | 1 | <1 | 11 h 30 min |
| November | 75°F | 58°F | 66.2°F | 2.32 | 8 | <1 | <1 | 10 h 40 min |
| December | 69°F | 51°F | 60.1°F | 2.99 | 8 | <1 | 1 | 10 h 10 min |
| Year (annual) | 80°F | 62°F | 71.2°F | 50.64 | 118 | 62 | 5 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 20°C | 9°C | 14.2°C | 70 mm |
| February | 21°C | 10°C | 15.6°C | 68 mm |
| March | 24°C | 13°C | 18.1°C | 87 mm |
| April | 27°C | 16°C | 21.2°C | 74 mm |
| May | 30°C | 20°C | 24.6°C | 93 mm |
| June | 31°C | 22°C | 26.9°C | 159 mm |
| July | 33°C | 23°C | 28.0°C | 124 mm |
| August | 32°C | 23°C | 27.8°C | 182 mm |
| September | 31°C | 23°C | 26.8°C | 182 mm |
| October | 28°C | 19°C | 23.4°C | 111 mm |
| November | 24°C | 14°C | 19.0°C | 59 mm |
| December | 21°C | 11°C | 15.6°C | 76 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00087826; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit St. Augustine?
Normal highs sit between 65°F and 85°F in January, February, March, April, October, November and December. Of those, April has the fewest days with rain (7).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00087826.
When is the last frost in St. Augustine?
In St. Augustine, the last spring frost (32°F) comes after February 1 in half of years and after March 3 in one year in ten; the first autumn frost comes before January 5 in half of years and before December 7 in one year in ten. A night at 32°F or colder comes at all in 79% of years here (NOAA).
- Last spring frost, half of years after
- February 11 year in 10 after March 3; 9 in 10 after December 31
- First autumn frost, half of years before
- January 51 year in 10 before December 7; 9 in 10 before February 10
NOAA puts the median frost-free season at 334 days, and the season without a hard freeze (28°F) at 365 days.
A hard freeze (28°F) comes after January 25 in half of springs and before January 10 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts St. Augustine in zone 9b across its 2 ZIP code areas (9b in 32084, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, St. Augustine's NOAA station is in zone 9b: the coldest night of a typical year reaches 28°F (23 complete years).
Frost dates for every NOAA station in Florida · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00087826; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
What hardiness zone is each St. Augustine ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. St. Augustine's 2 ZIP code areas are all in zone 9b. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in St. Augustine?
In a normal year in St. Augustine, 62 days a year reach 90°F (1 of them 100°F or more), 5 nights fall to 32°F or colder and 118 days bring measurable precipitation.
- Days at 90°F or more
- 62a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 5a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 118a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00087826.
How sunny is St. Augustine?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around St. Augustine, 4.8 kWh per square metre a day. April is the sunniest month (83%) and June the cloudiest (75%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 3.2 |
| February | 75% | 3.9 |
| March | 80% | 5.1 |
| April | 83% | 6.1 |
| May | 83% | 6.4 |
| June | 75% | 5.8 |
| July | 76% | 5.8 |
| August | 76% | 5.4 |
| September | 76% | 4.8 |
| October | 79% | 4.3 |
| November | 79% | 3.4 |
| December | 77% | 2.9 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does St. Augustine need?
A normal year in St. Augustine brings 803 heating degree days, 85% fewer than the median U.S. place (5,373), and 3,079 cooling degree days, 3.4 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 7,809 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 248 | 21 |
| February | 168 | 27 |
| March | 92 | 77 |
| April | 20 | 176 |
| May | 1 | 350 |
| June | 0 | 464 |
| July | 0 | 539 |
| August | 0 | 529 |
| September | 0 | 457 |
| October | 9 | 292 |
| November | 73 | 109 |
| December | 191 | 39 |
| Year (annual) | 803 | 3,079 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00087826. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does St. Augustine's climate compare?
St. Augustine is warmer than 37 of the other 105 places with their own NOAA record in Florida, and wetter than 20. Across the 7,247 U.S. stations with normals, its annual mean of 71.2°F is warmer than 96%.
In the Köppen classification computed from these normals, St. Augustine is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near St. Augustine share this climate record?
6 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- World Golf Village, FL24,485 people · 13 mi NW
- St. Augustine Shores, FL9,921 people · 6 mi S
- St. Augustine Beach, FL6,808 people · 3 mi S
- St. Augustine South, FL4,864 people · 3 mi SW
- Butler Beach, FL4,723 people · 6 mi S
- Vilano Beach, FL2,229 people · 3 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about St. Augustine's climate
What is the coldest month in St. Augustine?
January, with a normal high of 68°F and a normal low of 48°F. The warmest is July (91°F by day, 74°F at night).
Does it snow in St. Augustine?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in St. Augustine?
August, with 7.18 in of precipitation in a normal year; the driest is November with 2.32 in.
What plant hardiness zone is St. Augustine in?
The USDA's 2023 map puts St. Augustine in zone 9b across its 2 ZIP code areas (9b in 32084, the largest). By the same method at St. Augustine's NOAA station, the coldest night of a typical year reaches 28°F (23 years, 1991-2020): zone 9b.
How late can frost come in St. Augustine?
In half of years the last 32°F night comes after February 1; in one year in ten it comes after March 3. Waiting until March 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Florida climateThe statewide normals and every place in the state
- Hastings, FL14 miles from this station, 69.7°F a year
- Federal Point, FL17 miles from this station, 70.0°F a year
- Palm Coast, FL18 miles from this station, 71.4°F a year
- Jacksonville Beach, FL29 miles from this station, 71.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made