Chelsea, AL climate
Chelsea has mild winters and warm summers, with plenty of rain. A typical July afternoon reaches 91°, a January night drops to 33°, and about 1 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Chelsea feels like
Winter
Spring
Summer
Fall
Chelsea 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 | 55° | 33° | 5.3" | 0.4" | 11 | 0 | 36° – 51° |
| February | 60° | 36° | 5.5" | 0.3" | 11 | 0 | 40° – 56° |
| March | 67° | 43° | 5.5" | 0.5" | 11 | 0 | 49° – 64° |
| April | 75° | 49° | 5.0" | 0 | 9 | 0 | 58° – 67° |
| May | 82° | 58° | 4.2" | 0 | 10 | 0 | 66° – 74° |
| June | 88° | 66° | 4.8" | 0 | 11 | 0 | 73° – 81° |
| July | 91° | 69° | 4.9" | 0 | 12 | 0 | 77° – 83° |
| August | 90° | 68° | 4.2" | 0 | 11 | 0 | 75° – 85° |
| September | 86° | 63° | 4.0" | 0 | 7 | 0 | 71° – 80° |
| October | 76° | 51° | 3.5" | 0 | 7 | 0 | 59° – 68° |
| November | 65° | 40° | 4.5" | 0 | 8 | 0 | 47° – 58° |
| December | 57° | 35° | 5.2" | 0.2" | 10 | 0 | 38° – 56° |
| Year | 74° | 51° | 56.6" | 1.4" | 118 | 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 Chelsea
Chelsea gets 57 inches of rain and melted snow a year. March is the wettest month and October the driest. Rain or snow falls on about 118 days a year.
About 248 frost-free days a year
In half of years the last 32° night comes by March 12 and the first one by November 16. That leaves about 248 frost-free days for gardens, longer than 90% of U.S. towns.
Heating and cooling a home in Chelsea
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Chelsea, 52% of that work is heating and 48% is cooling.
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.
Chelsea and its neighbors
Chelsea borders 4 towns with climate data. January nights across them vary by 0.2°. Westover has both the coldest January nights (33°) and the hottest July afternoons (91°). Chelsea’s January low is 33° and its July high 91°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Chelsea 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 Chelsea averaged 0.8° warmer than the 1900s. The biggest change is in December (+1.5°). The shift is smaller than in 87% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Chelsea’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 38° to 56°. July is the most reliable, staying within 6°.
Common questions about Chelsea’s climate
What is the coldest month in Chelsea?
January, with a typical high of 55° and a low of 33°.
What is the hottest month in Chelsea?
July, with a typical high of 91° and a low of 69°. About 63 days a year reach 90°.
How much snow does Chelsea get?
About 1 inches in a normal winter, most of it in March.
When is the first frost in Chelsea?
In half of years the first 32° night comes by November 16, and the last spring frost by March 12.
What is the rainiest month in Chelsea?
March, with 5.5 inches of rain and melted snow. The year totals 57 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Chelsea itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Birmingham Airport, AL (19 mi, snow) and Alabaster Shelby Co Airport, AL (12 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.