St. Marys in Spring
In spring (March, April and May), St. Marys sees average daytime highs around 76°F and overnight lows near 61°F, with 7.6 in of rain over about 23 wet days across the season. It is the 3rd-warmest season and the driest season of the year.
Over the season highs climb from about 67°F in early March to 84°F by late May. The sky is clear or mostly clear about 42% of the time across spring, and the air most often feels dry.
Spring is St. Marys's best season of the year to visit on our travel score. For the whole year in context, see St. Marys's year-round climate.
- Avg daytime high
- 76°F
- 3rd-warmest season
- Avg overnight low
- 61°F
- Rainfall
- 7.6 in
- 23 wet days
- Avg wind
- 9 mph
- Travel score
- 7.0
- best season of the year
- Months
- Mar · Apr · May
Temperature in St. Marys in Spring
Over the season highs climb from about 67°F in early March to 84°F by late May.
A typical spring day in St. Marys reaches about 76°F and drops to 61°F overnight. The warmest of the three months is May, the coolest March.
How spring really feels in St. Marys
Once humidity and wind are folded in, spring brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
spring sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
St. Marys weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 62° / 48° | 2.9 | 7.7 | 10.2 | 5.7 |
| Feb | 65° / 50° | 2.5 | 7.2 | 10.9 | 6.2 |
| Mar | 70° / 55° | 2.8 | 7.3 | 11.8 | 7.0 |
| Apr | 75° / 61° | 2.3 | 6.9 | 12.7 | 7.5 |
| May | 82° / 68° | 2.5 | 8.5 | 13.5 | 6.6 |
| Jun | 86° / 74° | 5.1 | 17.5 | 14 | 4.3 |
| Jul | 88° / 76° | 4.6 | 18.2 | 13.8 | 3.7 |
| Aug | 87° / 76° | 5.8 | 20.4 | 13.1 | 3.7 |
| Sep | 83° / 74° | 5.4 | 15.5 | 12.2 | 5.0 |
| Oct | 78° / 66° | 3.2 | 8.9 | 11.2 | 7.1 |
| Nov | 70° / 57° | 1.8 | 6.1 | 10.4 | 7.2 |
| Dec | 64° / 51° | 2.5 | 7.4 | 10 | 6.3 |
Cloud cover in Spring
The sky is clear or mostly clear about 42% of the time across spring.
Chance of precipitation in Spring
St. Marys gets around 7.6 in of rain over 23 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 9 mph across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 18 min in early March to 13 h 48 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.8 kWh/m².
Hazard calendar for St. Marys
In spring, St. Marys overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
St. Marys sits in the Atlantic hurricane belt; the season peaks August–October.
St. Marys's rainy season runs June–October, when most of the year's rain falls.
Is spring a good time to visit St. Marys?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is one of the better times to visit St. Marys for general sightseeing.
What to pack for St. Marys in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, St. Marys sees daytime highs around 76°F and nights near 61°F. Pack light clothes and sun protection. Worth having: rain gear. About 23 days see rain.
Sea temperature near St. Marys in Spring
The nearest coast averages about 69°F across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 12 mi away) is warmest in August at about 83°F and coldest in February near 60°F.
It's comfortable for a long swim from Apr 15 to Nov 24 — about 7.4 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 61 | 60 | 63 | 68 | 75 | 80 | 82 | 83 | 82 | 77 | 70 | 64 |
| Comfort | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Tropical | Warm | Warm | Refreshing | Cool |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 61 | Cool |
| Feb | 60 | Cool |
| Mar | 63 | Cool |
| Apr | 68 | Refreshing |
| May | 75 | Refreshing |
| Jun | 80 | Warm |
| Jul | 82 | Warm |
| Aug | 83 | Tropical |
| Sep | 82 | Warm |
| Oct | 77 | Warm |
| Nov | 70 | Refreshing |
| Dec | 64 | Cool |
UV index in St. Marys in Spring
Clear-sky midday UV across spring averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in St. Marys peaks around June 22 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 6 | 7 | 7 | 8 | 10 | 10 | 9 | 8 | 6 | 5 | 3 |
| Level | Moderate | High | High | High | Very high | Extreme | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 6 | High |
| Mar | 7 | High |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 10 | Extreme |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 5 | Moderate |
| Dec | 3 | Moderate |
Air quality in St. Marys in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in St. Marys is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (December, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 9 | 13 | 14 | 14 | 15 | 16 | 18 | 16 | 11 | 8 | 7 | 7 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 13 | Moderate |
| Mar | 14 | Moderate |
| Apr | 14 | Moderate |
| May | 15 | Moderate |
| Jun | 16 | Moderate |
| Jul | 18 | Moderate |
| Aug | 16 | Moderate |
| Sep | 11 | Good |
| Oct | 8 | Good |
| Nov | 7 | Good |
| Dec | 7 | Good |
Where is St. Marys?
St. Marys sits at 30.7°N, 81.5°W, 10 ft above sea level, in United States. The nearest listed city is Kingsland, 9.9 mi away.
Topography around St. Marys
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of St. Marys.
Within 2 miles, the terrain around St. Marys has only modest variations in elevation — a maximum elevation change of 79 ft around an average of 10 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 125 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 295 ft.
The land around St. Marys is covered by wetland (41%), trees (25%) and water (23%) within 2 miles, trees (43%) and water (26%) within 10 miles, and trees (58%) and water (29%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for St. Marys (30.7305°, -81.5465°, elevation 10 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.