Dauphin Island, AL climate
Dauphin Island has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 89°, a January night drops to 43°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Dauphin Island feels like
Winter
Spring
Summer
Fall
Dauphin Island 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 | 60° | 43° | 5.0" | 0 | 12 | 0 | 45° – 59° |
| February | 63° | 47° | 4.2" | 0 | 10 | 0 | 46° – 64° |
| March | 70° | 53° | 5.1" | 0 | 10 | 0 | 55° – 69° |
| April | 76° | 59° | 5.1" | 0 | 7 | 0 | 63° – 71° |
| May | 83° | 67° | 4.7" | 0 | 7 | 0 | 72° – 78° |
| June | 88° | 73° | 6.4" | 0 | 10 | 0 | 78° – 84° |
| July | 89° | 75° | 7.5" | 0 | 12 | 0 | 80° – 85° |
| August | 90° | 75° | 6.5" | 0 | 12 | 0 | 80° – 85° |
| September | 87° | 72° | 6.1" | 0 | 8 | 0 | 77° – 83° |
| October | 79° | 62° | 4.2" | 0 | 7 | 0 | 67° – 75° |
| November | 69° | 51° | 4.0" | 0 | 8 | 0 | 55° – 65° |
| December | 63° | 46° | 4.7" | 0 | 12 | 0 | 48° – 62° |
| Year | 76° | 60° | 63.3" | 0.0" | 115 | 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 Dauphin Island
Dauphin Island gets 63 inches of rain and melted snow a year. July is the wettest month and November the driest. Rain or snow falls on about 115 days a year.
A year-round growing season
Heating and cooling a home in Dauphin Island
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Dauphin Island, 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 Dauphin Island 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 Dauphin Island averaged 0.6° warmer than the 1900s. The biggest change is in March (+1.1°). The shift is smaller than in 93% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Dauphin Island’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 46° to 64°. July is the most reliable, staying within 5°.
Common questions about Dauphin Island’s climate
What is the coldest month in Dauphin Island?
January, with a typical high of 60° and a low of 43°.
What is the hottest month in Dauphin Island?
August, with a typical high of 90° and a low of 75°. About 36 days a year reach 90°.
How much snow does Dauphin Island get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Dauphin Island?
Frost is uncommon. Only 79% of years see a night at 32° or below.
What is the rainiest month in Dauphin Island?
July, with 7.5 inches of rain and melted snow. The year totals 63 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Dauphin Island itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Dauphin Is #2, AL (4 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.