Port St. Joe, FL climate
Port St. Joe has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 90°, a January night drops to 44°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Port St. Joe feels like
Winter
Spring
Summer
Fall
Port St. Joe weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 64° | 44° | 4.3" | 0 | 8 | 0 | 48° – 61° |
| February | 66° | 48° | 4.3" | 0 | 7 | 0 | 48° – 65° |
| March | 71° | 53° | 4.4" | 0 | 7 | 0 | 56° – 70° |
| April | 77° | 59° | 3.6" | 0 | 5 | 0 | 63° – 74° |
| May | 84° | 66° | 2.8" | 0 | 4 | 0 | 72° – 79° |
| June | 88° | 73° | 6.3" | 0 | 9 | 0 | 77° – 85° |
| July | 90° | 75° | 7.0" | 0 | 12 | 0 | 80° – 85° |
| August | 89° | 75° | 7.8" | 0 | 13 | 0 | 80° – 85° |
| September | 87° | 72° | 6.3" | 0 | 9 | 0 | 76° – 83° |
| October | 80° | 63° | 3.3" | 0 | 5 | 0 | 68° – 77° |
| November | 72° | 52° | 3.3" | 0 | 5 | 0 | 56° – 70° |
| December | 66° | 47° | 3.8" | 0 | 6 | 0 | 47° – 66° |
| Year | 78° | 61° | 57.1" | 0.0" | 87 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Port St. Joe
Port St. Joe gets 57 inches of rain and melted snow a year. August is the wettest month and May the driest. Rain or snow falls on about 87 days a year.
About 307 frost-free days a year
In half of years the last 32° night comes by February 15 and the first one by December 18. That leaves about 307 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in Port St. Joe
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Port St. Joe, 31% of that work is heating and 69% is cooling, so air conditioning is the bigger bill.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Port St. Joe compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Port St. Joe averaged 1.0° warmer than the 1900s. The biggest change is in December (+1.7°). The shift is smaller than in 69% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Port St. Joe’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 47° to 66°. July is the most reliable, staying within 4°.
Common questions about Port St. Joe’s climate
What is the coldest month in Port St. Joe?
January, with a typical high of 64° and a low of 44°.
What is the hottest month in Port St. Joe?
July, with a typical high of 90° and a low of 75°. About 56 days a year reach 90°.
How much snow does Port St. Joe get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Port St. Joe?
In half of years the first 32° night comes by December 18, and the last spring frost by February 15.
What is the rainiest month in Port St. Joe?
August, with 7.8 inches of rain and melted snow. The year totals 57 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Port St. Joe itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Apalachicola Airport, FL (18 mi, snow) and Apalachicola Airport, FL (18 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.