Photo: William “Patrick” Ma… · CC BY-SA 3.0Few U.S. towns have milder winter nights than Jupiter Island
On a normal July day the thermometer tops out near 90°. Precipitation peaks in June and eases off in February. Its yearly precipitation tops that of 96% of U.S. towns. For walks and days out, the stretch from November to April brings highs of 74–82°.
A year in Jupiter Island at a glance
Each month’s typical high and low, and what it brings.
What stands out about Jupiter Island’s climate
Compared with towns across the U.S., with Jupiter Island’s place in Florida beside it.
What a year in Jupiter Island feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Frost is rare
Frost and day counts come from NOAA’s station at Port Salerno 5w, FL, 11 miles from the town’s center, at about the same height.
The 2023 USDA map puts Jupiter Island’s center in zone 10b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 37°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 58 inches of rain a year
June is the wettest month and February the driest. Rain falls on about 138 days a year. Snow is rare: about 0.0" in a normal year at Stuart, FL, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Jupiter Island
9% of the work is heating, so air conditioning is the bigger bill. No month averages under 55°.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Port Salerno 5w, FL.
Living with Jupiter Island’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10b. Frost comes about 1 winter in 3, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, November and December. 6.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Jupiter Island from natural hazards, hurricanes are the largest share (79%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Jupiter Island and similar climates
TownRatings has no climate map of the towns around Jupiter Island yet.
Climates most like Jupiter Island’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Jupiter Island, FL | 57° | 90° | 58" | 0.0" |
| Texas City, TX | 47° | 90° | 54" | 0.1" |
| Galliano, LA | 46° | 90° | 63" | 0.0" |
| Gulf Shores, AL | 44° | 90° | 62" | 0.0" |
| Bay St. Louis, MS | 43° | 89° | 64" | 0.0" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Jupiter Island averaged 1.7° warmer than the 1900s. The biggest change is in February (+2.3°).
A bigger shift than in 69% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Jupiter Island compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Jupiter Island’s place among Florida’s.
Jupiter Island weather by month
Highs, lows and precipitation from NOAA’s grid at Jupiter Island’s center; snow, wet days and snow on the ground from Stuart, FL. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 74° | 57° | 2.9" | 0.0" | 9 | 0 | 58° – 70° |
| February | 76° | 59° | 2.5" | 0.0" | 8 | 0 | 59° – 74° |
| March | 78° | 62° | 3.2" | 0.0" | 8 | 0 | 62° – 76° |
| April | 82° | 67° | 3.2" | 0.0" | 9 | 0 | 70° – 79° |
| May | 85° | 71° | 4.7" | 0.0" | 10 | 0 | 75° – 80° |
| June | 88° | 75° | 8.1" | 0.0" | 14 | 0 | 80° – 84° |
| July | 90° | 76° | 5.8" | 0.0" | 14 | 0 | 81° – 85° |
| August | 90° | 76° | 7.8" | 0.0" | 16 | 0 | 81° – 85° |
| September | 88° | 76° | 7.9" | 0.0" | 16 | 0 | 80° – 84° |
| October | 85° | 72° | 5.8" | 0.0" | 14 | 0 | 76° – 82° |
| November | 80° | 66° | 3.6" | 0.0" | 10 | 0 | 68° – 78° |
| December | 76° | 60° | 2.8" | 0.0" | 10 | 0 | 57° – 75° |
| Year | 83° | 68° | 58.1" | 0.0" | 138 | 0 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 57° to 75°. September is the most reliable, staying within 3°.
Where Jupiter Island’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Jupiter Island’s center.
- Snow: Stuart, FL.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Port Salerno 5w, FL, 11 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Jupiter Island’s climate
What is the weather like in Jupiter Island?
A typical July afternoon reaches 90°, a January night drops to 57°, and snow is almost unheard of. Milder January nights than all but 171 U.S. towns; hotter July afternoons than 77% of U.S. towns.
How cold does it get in Jupiter Island in winter?
January nights average 57°. About 1 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 58°.
How much snow does Jupiter Island get?
About 0.0 inches in a normal winter at Stuart, FL, so most winters see none.
How hot does it get in Jupiter Island?
July, with a typical high of 90° and a low of 76°. About 86 days a year reach 90° (Port Salerno 5w, FL).
When is the first and last frost in Jupiter Island?
Most years have no frost at all: a 32° night comes in about 33% of winters at Port Salerno 5w, FL, usually in December or January.
What growing zone is Jupiter Island in?
Zone 10b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 37°.
What is the best time of year to visit Jupiter Island?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Jupiter Island getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 69% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Jupiter Island.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.