San Castle, FL climate
San Castle has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 90°, a January night drops to 59°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in San Castle feels like
Winter
Spring
Summer
Fall
San Castle 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 | 75° | 59° | 2.9" | 0 | 10 | 0 | 61° – 72° |
| February | 77° | 61° | 2.7" | 0 | 8 | 0 | 61° – 75° |
| March | 79° | 64° | 3.0" | 0 | 8 | 0 | 64° – 77° |
| April | 82° | 69° | 3.3" | 0 | 8 | 0 | 72° – 79° |
| May | 85° | 73° | 5.3" | 0 | 11 | 0 | 76° – 81° |
| June | 88° | 76° | 8.5" | 0 | 18 | 0 | 80° – 85° |
| July | 90° | 77° | 6.3" | 0 | 18 | 0 | 82° – 85° |
| August | 90° | 77° | 8.0" | 0 | 19 | 0 | 82° – 85° |
| September | 88° | 76° | 8.2" | 0 | 17 | 0 | 81° – 84° |
| October | 85° | 73° | 6.2" | 0 | 14 | 0 | 77° – 82° |
| November | 80° | 67° | 3.7" | 0 | 9 | 0 | 70° – 79° |
| December | 77° | 62° | 2.9" | 0 | 10 | 0 | 59° – 77° |
| Year | 83° | 69° | 60.9" | 0.0" | 149 | 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 San Castle
San Castle gets 61 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 149 days a year.
A year-round growing season
Heating and cooling a home in San Castle
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In San Castle, 5% of that work is heating and 95% 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.
San Castle and its neighbors
San Castle borders 3 towns with climate data. January nights across them vary by 0.2°. Lantana has both the coldest January nights (59°) and the hottest July afternoons (90°). San Castle’s January low is 59° and its July high 90°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How San Castle 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 San Castle averaged 1.7° warmer than the 1900s. The biggest change is in February (+2.3°). The shift is larger than in 80% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at San Castle’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 59° to 77°. August is the most reliable, staying within 3°.
Common questions about San Castle’s climate
What is the coldest month in San Castle?
January, with a typical high of 75° and a low of 59°.
What is the hottest month in San Castle?
August, with a typical high of 90° and a low of 77°. About 74 days a year reach 90°.
How much snow does San Castle get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in San Castle?
Frost is uncommon. Only 7% of years see a night at 32° or below.
What is the rainiest month in San Castle?
June, with 8.5 inches of rain and melted snow. The year totals 61 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for San Castle itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Loxahatchee Nwr, FL (11 mi, snow) and West Palm Beach Intl Airport, FL (9 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.