Climateby Month

Port St. Lucie, FL climate by month

NOAA 1991-2020 normals · 14 ft elevation

Summers in Port St. Lucie are hot and oppressively humid; winters are mild. Highs peak at 89°F in July and fall to 72°F in January. The wettest month is September (about 15 wet days) and the driest is February (about 7). The most comfortable time to visit is January, February and March.

Warmest month
89°F
July normal high
Coldest month
53°F
January normal low
Wet days a year
124
55.9 in of precipitation
Muggy days a year
236
dew point 65°F or higher

How warm is Port St. Lucie?

Normal highs range from 72°F in January to 89°F in July.

50°60°70°80°90° January: normal high 72°F (22°C), low 53°F (12°C) 72° 53° February: normal high 74°F (23°C), low 55°F (13°C) March: normal high 77°F (25°C), low 59°F (15°C) April: normal high 81°F (27°C), low 64°F (18°C) May: normal high 84°F (29°C), low 69°F (21°C) June: normal high 88°F (31°C), low 73°F (23°C) July: normal high 89°F (32°C), low 74°F (23°C) 89° 74° August: normal high 89°F (32°C), low 75°F (24°C) September: normal high 88°F (31°C), low 74°F (23°C) October: normal high 84°F (29°C), low 70°F (21°C) November: normal high 78°F (26°C), low 62°F (17°C) December: normal high 74°F (23°C), low 57°F (14°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Port St. Lucie?

September has the most wet days (about 15); the year brings about 56 in of precipitation.

January: 8 wet days February: 7 wet days 7 March: 7 wet days April: 7 wet days May: 9 wet days June: 14 wet days July: 13 wet days August: 15 wet days September: 15 wet days 15 October: 12 wet days November: 10 wet days December: 8 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How humid is Port St. Lucie?

Muggy days peak in July, at about 31 days.

January: 8 muggy days 8 February: 9 muggy days March: 10 muggy days April: 14 muggy days May: 24 muggy days June: 30 muggy days July: 31 muggy days 31 August: 31 muggy days September: 30 muggy days October: 25 muggy days November: 14 muggy days December: 12 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Palm Beach International Airport, 45 mi SSE of the city center (the nearest airport with complete hourly records).

How much daylight?

Daylight ranges from about 10.5 hours in December to 13.8 hours in June.

January: 10.6 hours of daylight February: 11.2 hours of daylight March: 12.0 hours of daylight April: 12.8 hours of daylight May: 13.5 hours of daylight June: 13.8 hours of daylight 13.8 July: 13.7 hours of daylight August: 13.1 hours of daylight September: 12.3 hours of daylight October: 11.5 hours of daylight November: 10.8 hours of daylight December: 10.4 hours of daylight 10.4 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Port St. Lucie, 1991-2020
MonthHighLowPrecip.Wet daysMuggy daysDaylight
January 72°F53°F 3.0 in8 8 10.6 h
February 74°F55°F 2.8 in7 9 11.2 h
March 77°F59°F 3.0 in7 10 12.0 h
April 81°F64°F 3.6 in7 14 12.8 h
May 84°F69°F 4.2 in9 24 13.5 h
June 88°F73°F 6.2 in14 30 13.8 h
July 89°F74°F 6.2 in13 31 13.7 h
August 89°F75°F 7.3 in15 31 13.1 h
September 88°F74°F 8.2 in15 30 12.3 h
October 84°F70°F 5.7 in12 25 11.5 h
November 78°F62°F 3.2 in10 14 10.8 h
December 74°F57°F 2.4 in8 12 10.4 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Port St. Lucie

By our comfort score, the best months are January, February and March.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 611250
Feb 611040
Mar 631151
Apr 57651
May 50165
Jun 420911
Jul 370919
Aug 3301120
Sep 3801010
Oct 45173
Nov 55750
Dec 57950

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Port St. Lucie

A night at 32°F or below happens in about 14% of years in Port St. Lucie, so there is no typical frost date. In most years there is no frost at all.

Station: Stuart (USC00088620), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Florida.

Hottest and coldest readings, 1991-2020

The highest reading was 101°F (July 20, 1993); the lowest was 24°F (December 27, 2010).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Port St. Lucie

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, snowfall and snow depth: Ft Pierce (USC00083207), 10 mi N of the city center, 25 ft . NOAA normals and daily records, 1991-2020.
  • Frost dates: Stuart (USC00088620), 9.9 mi SE of the city center, 13 ft . NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour: West Palm Beach Intl Airport (USW00012844), 45 mi SSE of the city center, 19 ft . NOAA normals and daily records, 1991-2020.
  • Cloud cover: Melbourne Intl Airport (USW00012838), 58 mi NNW of the city center, 22 ft . NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Palm Beach International Airport (722030-12844), 45 mi SSE of the city center, 11 ft . Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error