St. Leo, Florida climate: Normal weather by month, frost dates and records
St. Leo's normal year runs from 49°F January nights to 90°F August afternoons, with 53.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 22.2°C, January lows of 10°C, August highs of 32°C, 1,358 mm of precipitation a year.
- NOAA stationSaint Leo
- Station IDUSC00087851
- Location28.34°N 82.26°W
- Elevation190 ft (58 m)
- From the centerunder 1 mile
- Population2,472
On October 14, the normal high in St. Leo is 84°F and the normal low 66°F, and the chance of measurable rain or snow is 26%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for St. Leo.
- Jan 70° 49°
- Feb 73° 52°
- Mar 78° 55°
- Apr 83° 60°
- May 88° 66°
- Jun 89° 71°
- Jul 90° 73°
- Aug 90° 73°
- Sep 88° 71°
- Oct 83° 65°
- Nov 77° 57°
- Dec 72° 52°
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. Leo each month?
August is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 49°F. The most precipitation falls in June (8.34 in), the least in November (1.86 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 70°F | 49°F | 59.7°F | 3.06 | 8 | <1 | 2 | 10 h 30 min |
| February | 73°F | 52°F | 62.6°F | 2.38 | 7 | <1 | 1 | 11 h 10 min |
| March | 78°F | 55°F | 66.4°F | 3.18 | 7 | 1 | <1 | 12 h |
| April | 83°F | 60°F | 71.4°F | 3.06 | 6 | 4 | <1 | 12 h 50 min |
| May | 88°F | 66°F | 76.7°F | 2.98 | 7 | 17 | <1 | 13 h 30 min |
| June | 89°F | 71°F | 80.2°F | 8.34 | 15 | 20 | <1 | 14 h |
| July | 90°F | 73°F | 81.3°F | 8.10 | 17 | 24 | <1 | 13 h 50 min |
| August | 90°F | 73°F | 81.4°F | 8.28 | 18 | 24 | <1 | 13 h 10 min |
| September | 88°F | 71°F | 79.8°F | 6.63 | 13 | 19 | <1 | 12 h 20 min |
| October | 83°F | 65°F | 74.1°F | 3.06 | 8 | 5 | <1 | 11 h 30 min |
| November | 77°F | 57°F | 66.8°F | 1.86 | 6 | <1 | <1 | 10 h 50 min |
| December | 72°F | 52°F | 62.1°F | 2.53 | 7 | <1 | 1 | 10 h 20 min |
| Year (annual) | 82°F | 62°F | 71.9°F | 53.46 | 119 | 114 | 3 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 21°C | 10°C | 15.4°C | 78 mm |
| February | 23°C | 11°C | 17.0°C | 60 mm |
| March | 25°C | 13°C | 19.1°C | 81 mm |
| April | 28°C | 16°C | 21.9°C | 78 mm |
| May | 31°C | 19°C | 24.8°C | 76 mm |
| June | 32°C | 22°C | 26.8°C | 212 mm |
| July | 32°C | 23°C | 27.4°C | 206 mm |
| August | 32°C | 23°C | 27.4°C | 210 mm |
| September | 31°C | 22°C | 26.6°C | 168 mm |
| October | 29°C | 18°C | 23.4°C | 78 mm |
| November | 25°C | 14°C | 19.3°C | 47 mm |
| December | 22°C | 11°C | 16.7°C | 64 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00087851; 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. Leo?
Normal highs sit between 65°F and 85°F in January, February, March, April, October, November and December. Of those, November has the fewest days with rain (6).
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 USC00087851.
When is the last frost in St. Leo?
In St. Leo, the last spring frost (32°F) comes after January 31 in half of years and after February 28 in one year in ten; the first autumn frost comes before January 8 in half of years and before December 10 in one year in ten. A night at 32°F or colder comes at all in 81% of years here (NOAA).
- Last spring frost, half of years after
- January 311 year in 10 after February 28; 9 in 10 after January 3
- First autumn frost, half of years before
- January 81 year in 10 before December 10; 9 in 10 before February 10
NOAA puts the median frost-free season at 336 days, and the season without a hard freeze (28°F) at 365 days.
A hard freeze (28°F) comes after January 24 in half of springs and before January 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts St. Leo in zone 9b in ZIP code 33574. By the map's own method, the average of each year's coldest night over 1991-2020, St. Leo's NOAA station is in zone 9b: the coldest night of a typical year reaches 29°F (29 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 USC00087851; 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.
How hot and how cold does it get in St. Leo?
In a normal year in St. Leo, 114 days a year reach 90°F, 3 nights fall to 32°F or colder and 119 days bring measurable precipitation.
- Days at 90°F or more
- 114a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 3a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 119a normal year
The highest temperature in this station's record (since 1895) is 103°F, on June 7, 1985; the lowest is 18°F, on January 21, 1985.
The wettest calendar year on that record is 1945, with 81.93 in; the snowiest season is 1976–77, with 1.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00087851; records: ACIS (NOAA Regional Climate Centers), station USC00087851. Records use complete months only; a month missing more than three days is left out.
How sunny is St. Leo?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around St. Leo, 5.0 kWh per square metre a day. May is the sunniest month (86%) and July the cloudiest (76%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 79% | 3.4 |
| February | 78% | 4.1 |
| March | 82% | 5.3 |
| April | 85% | 6.3 |
| May | 86% | 6.7 |
| June | 79% | 6.0 |
| July | 76% | 5.7 |
| August | 77% | 5.5 |
| September | 80% | 5.1 |
| October | 84% | 4.6 |
| November | 83% | 3.7 |
| December | 79% | 3.1 |
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. Leo need?
A normal year in St. Leo brings 619 heating degree days, 88% fewer than the median U.S. place (5,373), and 3,149 cooling degree days, 3.5 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 8,044 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 202 | 38 |
| February | 123 | 56 |
| March | 66 | 110 |
| April | 12 | 205 |
| May | 1 | 363 |
| June | 0 | 456 |
| July | 0 | 507 |
| August | 0 | 508 |
| September | 0 | 442 |
| October | 8 | 291 |
| November | 59 | 113 |
| December | 150 | 60 |
| Year (annual) | 619 | 3,149 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00087851. 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.
Has St. Leo been warmer than normal lately?
2025 averaged 72.9°F, 1.0°F above the 1991-2020 normal of 71.9°F. 3 of the 3 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 73.6°F | +1.7°F | 47.21 |
| 2024 | 73.6°F | +1.7°F | 65.78 |
| 2025 | 72.9°F | +1.0°F | 43.78 |
Over 107 complete years from 1897 to 2025, the station's annual mean temperature rose at a fitted 0.8°F per century (+0.04°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00087851; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does St. Leo's climate compare?
St. Leo is warmer than 47 of the other 105 places with their own NOAA record in Florida, and wetter than 51. Across the 7,247 U.S. stations with normals, its annual mean of 71.9°F is warmer than 97%.
In the Köppen classification computed from these normals, St. Leo 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. Leo share this climate record?
14 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.
- Wesley Chapel, FLalso near: Plant City (17 mi, 74.3°F a year); Brooksville (20 mi, 70.7°F a year)71,965 people · 10 mi S
- Land O' Lakes, FL41,845 people · 14 mi SW
- Zephyrhills, FL22,304 people · 8 mi SE
- Pasadena Hills, FL12,848 people · 4 mi S
- Pebble Creek, FL10,719 people · 13 mi S
- Dade City, FL9,662 people · 4 mi E
- Zephyrhills West, FL5,770 people · 8 mi SE
- Zephyrhills South, FL5,422 people · 10 mi SE
- Ridge Manor, FL4,478 people · 12 mi N
- Zephyrhills North, FL3,243 people · 8 mi SE
- Dade City North, FL3,049 people · 5 mi NE
- San Antonio, FL1,577 people · 1 mi W
- Lacoochee, FL1,445 people · 10 mi NE
- Trilby, FL302 people · 9 mi NE
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. Leo's climate
What is the coldest month in St. Leo?
January, with a normal high of 70°F and a normal low of 49°F. The warmest is August (90°F by day, 73°F at night).
Does it snow in St. Leo?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in St. Leo?
June, with 8.34 in of precipitation in a normal year; the driest is November with 1.86 in.
What plant hardiness zone is St. Leo in?
The USDA's 2023 map puts St. Leo in zone 9b in ZIP code 33574. By the same method at St. Leo's NOAA station, the coldest night of a typical year reaches 29°F (29 years, 1991-2020): zone 9b.
How late can frost come in St. Leo?
In half of years the last 32°F night comes after January 31; in one year in ten it comes after February 28. Waiting until February 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Florida climateThe statewide normals and every place in the state
- Brooksville, FL15 miles from this station, 70.7°F a year
- Brooksville Chinsegut Hill, FL21 miles from this station, 72.1°F a year
- Spring Hill, FL23 miles from this station, 72.6°F a year
- Plant City, FL23 miles from this station, 74.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made