Photo: U.S. Army Corps of Engineers, photographer not specified or unknown · Public domainSt. George has some of the coolest summers among U.S. towns
Deep winter brings January lows near 23°. Precipitation peaks in October and eases off in March. It is a dry place: less rain and snow fall here than on 89% of U.S. towns. Seedlings are safe outdoors from about May 31, with the first autumn frost due around October 5.
A year in St. George at a glance
Each month’s typical high and low, and what it brings.
What stands out about St. George’s climate
Compared with towns across the U.S., with St. George’s place in Alaska beside it.
What a year in St. George feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 128 frost-free days a year
In half of years the last 32° night comes by May 31 and the first by October 5. Frost and day counts come from NOAA’s station at St George Island Airport, 2.2 miles from the town’s center, 270 ft lower.
The 2023 USDA map puts St. George’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 3°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
About 20 inches of rain a year
October is the wettest month and March the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in St. George
Nearly all of the work is heating: a normal year has almost no cooling days. Months averaging under 55° run from every month of the year.
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 George Island Airport.
Living with St. George’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
128 frost-free days in zone 7a. The last frost comes by May 31 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 5.
7.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in St. George from natural hazards, tsunamis are the largest share (93%). Normals are averages; the hazards page covers the extremes.
Natural hazards →St. George and similar climates
TownRatings has no climate map of the towns around St. George yet.
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
How St. George compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with St. George’s place among Alaska’s.
St. George weather by month
Highs, lows and precipitation from the nearest NOAA station. 1991–2020 normals.
| Month | High | Low | Rain + melt |
|---|---|---|---|
| January | 30° | 23° | 1.2" |
| February | 32° | 24° | 1.1" |
| March | 31° | 23° | 0.8" |
| April | 35° | 28° | 0.9" |
| May | 42° | 34° | 1.0" |
| June | 47° | 39° | 1.3" |
| July | 51° | 44° | 2.0" |
| August | 52° | 46° | 2.7" |
| September | 50° | 42° | 2.5" |
| October | 43° | 36° | 3.0" |
| November | 38° | 30° | 2.3" |
| December | 34° | 26° | 1.8" |
| Year | 40° | 33° | 20.4" |
Where St. George’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s 1991–2020 normals at the nearest station (NOAA’s grid doesn’t cover Alaska).
- Frost, freezing nights, 90° and 100° days, heating and cooling: St George Island Airport, 2.2 miles from the town’s center, 270 ft lower; 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.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about St. George’s climate
What is the weather like in St. George?
A typical July afternoon reaches 51°, a January night drops to 23°. Milder January nights than 55% of U.S. towns; cooler July afternoons than all but 1 U.S. town.
How cold does it get in St. George in winter?
January nights average 23°. About 162 nights a year reach 32° or below.
How hot does it get in St. George?
July, with a typical high of 51°. 90° days are rare: none in a normal year at St George Island Airport.
When is the first and last frost in St. George?
In half of years the last spring frost (32°) comes by May 31 and the first fall frost by October 5, about 128 frost-free days, at St George Island Airport.
What growing zone is St. George in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 3°.
What is the best time of year to visit St. George?
No month meets the simple rule we use (highs of 62–84° and lows of 40° or more). The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Neighbors talk weather
Gardens, snow, and the best days of the year in St. George.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.