Photo: Sarah Stierch · CC BY 4.0No extremes in St. George Island: its weather tracks the middle of U.S. towns
Nights in January average 28°. Winters are mild: January nights here are milder than in 70% of U.S. towns. Compared with 1901–2000, the average now sits 1.5° higher. Homes need heating from November to March, the months averaging under 50°.
A year in St. George Island at a glance
Each month’s typical high and low, and what it brings.
What stands out about St. George Island’s climate
Compared with towns across the U.S., with St. George Island’s place in Maryland beside it.
What a year in St. George Island feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 229 frost-free days a year
In half of years the last 32° night comes by March 30 and the first by November 14. Frost and day counts come from NOAA’s station at St Inigoes Webster Nolf, MD, 3 miles from the town’s center, at about the same height.
The 2023 USDA map puts St. George Island’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 13°. 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 12 inches of snow a winter
Snow, measured at Warsaw 2 Nw, VA, falls mostly in January. Precipitation (rain plus melted snow) adds up to 45 inches a year; August is the wettest month and February the driest. Rain or snow falls on about 115 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in St. George Island
72% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at St Inigoes Webster Nolf, MD.
Living with St. George Island’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
229 frost-free days in zone 8a. The last frost comes by Mar 30 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 14.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October.
Parks & trails →Of the yearly building losses FEMA expects in St. George Island from natural hazards, coastal flooding is the largest share (32%); heat waves, cold waves, winter storms and ice storms together are 6%. Normals are averages; the hazards page covers the extremes.
Natural hazards →St. George Island and similar climates
TownRatings has no climate map of the towns around St. George Island yet.
Climates most like St. George 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 |
|---|---|---|---|---|
| St. George Island, MD | 28° | 88° | 45" | 12" |
| Vinton, VA | 27° | 88° | 45" | 15" |
| Lewisville, NC | 28° | 88° | 45" | 7.0" |
| Johnson City, TN | 27° | 87° | 46" | 9.2" |
| Harrison, AR | 26° | 89° | 47" | 9.5" |
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 St. George Island averaged 1.5° warmer than the 1900s. The biggest change is in December (+2.3°).
A bigger shift than in 58% 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 St. George Island compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with St. George Island’s place among Maryland’s.
St. George Island weather by month
Highs, lows and precipitation from NOAA’s grid at St. George Island’s center; snow, wet days and snow on the ground from Warsaw 2 Nw, VA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 46° | 28° | 3.1" | 4.4" | 9 | 3 | 30° – 43° |
| February | 49° | 29° | 2.7" | 3.3" | 8 | 3 | 28° – 46° |
| March | 56° | 36° | 3.8" | 1.4" | 9 | 0 | 41° – 55° |
| April | 67° | 46° | 3.3" | 0.1" | 10 | 0 | 52° – 62° |
| May | 75° | 56° | 3.6" | 0.0" | 11 | 0 | 60° – 71° |
| June | 83° | 65° | 4.3" | 0.0" | 11 | 0 | 69° – 79° |
| July | 88° | 70° | 4.6" | 0.0" | 10 | 0 | 74° – 82° |
| August | 86° | 68° | 4.7" | 0.0" | 10 | 0 | 73° – 80° |
| September | 80° | 62° | 4.1" | 0.0" | 9 | 0 | 68° – 77° |
| October | 70° | 50° | 3.9" | 0.0" | 9 | 0 | 56° – 67° |
| November | 59° | 40° | 3.2" | 0.1" | 8 | 0 | 44° – 54° |
| December | 50° | 32° | 3.6" | 2.2" | 9 | 2 | 33° – 52° |
| Year | 67° | 48° | 44.8" | 11.5" | 115 | 8 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 33° to 52°. August is the most reliable, staying within 7°.
Where St. George 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 St. George Island’s center.
- Snow: Warsaw 2 Nw, VA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: St Inigoes Webster Nolf, MD, 3 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 St. George Island’s climate
What is the weather like in St. George Island?
A typical July afternoon reaches 88°, a January night drops to 28°, and about 12 inches of snow falls in a normal winter. Milder January nights than 70% of U.S. towns; hotter July afternoons than 67% of U.S. towns.
How cold does it get in St. George Island in winter?
January nights average 28°. About 69 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 30°.
How much snow does St. George Island get?
About 12 inches in a normal winter at Warsaw 2 Nw, VA, most of it in January, with snow on the ground about 8 days a year.
How hot does it get in St. George Island?
July, with a typical high of 88° and a low of 70°. About 29 days a year reach 90° and 1 reach 100° (St Inigoes Webster Nolf, MD).
When is the first and last frost in St. George Island?
In half of years the last spring frost (32°) comes by March 30 and the first fall frost by November 14, about 229 frost-free days, at St Inigoes Webster Nolf, MD.
What growing zone is St. George Island in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 13°.
What is the best time of year to visit St. George Island?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is St. George Island getting warmer?
Yes: 1991–2020 averaged 1.5° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 58% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in St. George 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.