Port St. Lucie, Florida climate: NOAA's gridded normals for the city, beside the nearest station records
NOAA's gridded 1991-2020 normals put Port St. Lucie's center at January lows of 54°F and July highs of 91°F, a yearly mean of 74.1°F and 55.7 inches of precipitation. No NOAA station keeps a record under the city's name. The nearest station record, Nettles Island (10 miles E, 10 ft), has January lows of 57°F and July highs of 89°F.
258,575 people (Census Bureau 2024). Distances and directions are from the city's center.
- Jan 74° 54°
- Feb 76° 56°
- Mar 79° 59°
- Apr 83° 63°
- May 86° 68°
- Jun 89° 72°
- Jul 91° 74°
- Aug 91° 74°
- Sep 89° 73°
- Oct 85° 69°
- Nov 80° 62°
- Dec 76° 57°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
The months above are NOAA's gridded normals at Port St. Lucie's center.
What is each month like in Port St. Lucie?
NOAA's grid estimates the normals every 5 km or so from the stations around each point, terrain included. It smooths between stations, so night lows at the heart of a large city can run warmer than the grid shows: at five big-city airports we compared, the grid's highs were within about 1°F of the station and its lows 1-6°F cooler. The nearest record's high and low are beside each month.
| Month | High | Low | Mean | Precip. | Nettles Island high | Nettles Island low |
|---|---|---|---|---|---|---|
| January | 74°F | 54°F | 63.7°F | 2.74 | 73°F | 57°F |
| February | 76°F | 56°F | 65.9°F | 2.33 | 74°F | 60°F |
| March | 79°F | 59°F | 68.8°F | 3.14 | 77°F | 63°F |
| April | 83°F | 63°F | 73.0°F | 3.17 | 80°F | 68°F |
| May | 86°F | 68°F | 77.2°F | 4.41 | 84°F | 72°F |
| June | 89°F | 72°F | 80.9°F | 7.64 | 87°F | 76°F |
| July | 91°F | 74°F | 82.2°F | 6.17 | 89°F | 77°F |
| August | 91°F | 74°F | 82.3°F | 7.55 | 89°F | 77°F |
| September | 89°F | 73°F | 81.0°F | 7.41 | 88°F | 76°F |
| October | 85°F | 69°F | 77.1°F | 5.30 | 85°F | 73°F |
| November | 80°F | 62°F | 70.9°F | 3.22 | 79°F | 66°F |
| December | 76°F | 57°F | 66.3°F | 2.62 | 75°F | 61°F |
In metric: a yearly mean of 23.4°C, January lows of 12°C, July highs of 33°C and 1,415 mm of precipitation a year.
Source: NOAA NCEI U.S. Monthly Gridded Climate Normals 1991-2020 (nClimGrid, accession 0245564); NOAA NCEI 1991-2020 station normals. The grid cell holding the city's Census center point.
What do the station records around Port St. Lucie say?
Each row is a NOAA station's own 1991-2020 normals, with the snow and frost dates the grid does not give. A record downhill or nearer the coast than the city can run warmer, one uphill cooler: compare the elevations.
| Record | Where | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Nettles Island | 10 mi E | 10 ft | 75.2°F | 57°F | 89°F | 58.9 | – | – |
| Stuart | 11 mi SE | 13 ft | 75.3°F | 56°F | 91°F | 62.7 | 0 | January 23 |
| Port Salerno5 mi W | 15 mi SE | 12 ft | 73.7°F | 54°F | 90°F | 64.2 | – | January 26 |
Source: NOAA NCEI 1991-2020 U.S. Climate Normals; place center and population: Census Bureau 2024. Last frost: the median last spring date of 32°F.
How much snow, how late a frost, what zone and how much sun in Port St. Lucie?
NOAA's grid gives no snow, frost dates or records, so these come from the nearest station record, Nettles Island (10 miles E, 10 ft). NOAA publishes no snowfall normal for it; the nearest record that has one, Stuart (11 miles SE), gets 0 inches a year. Frost is rare there: NOAA gives no median frost date.
The USDA's 2023 Plant Hardiness Zone Map puts Port St. Lucie in zone 10a across its 6 ZIP code areas.
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area (5.0 kWh per square metre a day, NASA POWER 2001-2020); April is the sunniest month (84%) and June the cloudiest (77%).
Nettles Island's page has its months, frost probabilities, records by month and recent years. NOAA's grid has monthly figures only, so there are no day-by-day month pages for Port St. Lucie; the nearest record's month pages have them.
Source: NOAA NCEI 1991-2020 normals, station USC00086092; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; sunshine: NASA POWER.
How does the climate vary across Port St. Lucie, ZIP code by ZIP code?
6 ZIP code areas lie wholly or partly in Port St. Lucie. On NOAA's grid 34984 is the warmest (74.8°F a year) and 34987 the coolest (73.9°F), a spread of 0.9°F. Each row also names the nearest station record and its frost dates.
| ZIP code | Zone | Year | Jan low | Jul high | Precip. | Nearest record | Last frost | First frost |
|---|---|---|---|---|---|---|---|---|
| 34952 | 10a | 74.2°F | 54°F | 90°F | 56.2 | Nettles Island (5 mi) | – | – |
| 34953 | 10a | 74.2°F | 54°F | 91°F | 55.6 | Stuart (10 mi) | January 23 | January 18 |
| 34983 | 10a | 74.0°F | 54°F | 90°F | 55.9 | Nettles Island (8 mi) | – | – |
| 34984 | 10a | 74.8°F | 55°F | 90°F | 56.5 | Stuart (7 mi) | January 23 | January 18 |
| 34986 | 10a | 73.9°F | 53°F | 91°F | 55.6 | Nettles Island (11 mi) | – | – |
| 34987 | 10a | 73.9°F | 53°F | 91°F | 54.9 | Fort Pierce (16 mi) | January 24 | January 14 |
Source: Census Bureau 2020 ZCTA-to-place relationship file and ZCTA centers; NOAA NCEI gridded and station normals, 1991-2020. A ZIP area counts when at least a tenth of its land (and 0.5 km²) is in the city; its figures are the grid cell at its center; frost dates are the nearest record's medians of 32°F.