St. Marys weather in March
In March, St. Marys sees average daytime highs of 70°F and overnight lows near 55°F, with 2.8 in of rain across 7.3 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 7th-wettest month of the year here.
Highs climb over the month, from about 67°F in the first days to 72°F by the end. The sky is clear or mostly clear about 40% of the time in March, and the air most often feels dry.
Daylight stretches from about 11 h 18 min at the start of March to 12 h 12 min by month's end. Set against the rest of the year, March is St. Marys's 5th-clearest and 1st-windiest month. For the whole year in context, see St. Marys's year-round climate.
- Daytime high
- 70°
- 9th warmest
- Overnight low
- 55°
- 4th coldest
- Rainfall
- 2.8 in
- 7.3 wet days
- Daylight
- 11 h 48 min
- 6:43 AM – 6:29 PM
- Cloud cover
- 51%
- 5th clearest
- Wind
- 9 mph
- 1st windiest
- Solar energy
- 4.96 kWh/m²
- Travel score
- 7.0
- out of 10
St. Marys is city in Camden County, Georgia, USA.
- Density
- 279/km²
- people per km²
- Founded
- 1792
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in March
Highs climb over the month, from about 67°F in the first days to 72°F by the end.
A typical March day in St. Marys reaches about 70°F in the afternoon and slips back to 55°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 78°F. Set against its neighbours, March runs about 5°F warmer than February and about 6°F cooler than April.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 67 | 67 | 67 | 67 | 68 | 68 | 68 | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 69 | 69 | 70 | 70 | 70 | 70 | 71 | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 72 | 73 | 73 |
| Avg low (°F) | 52 | 52 | 52 | 52 | 52 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 54 | 54 | 54 | 55 | 55 | 55 | 55 | 56 | 56 | 56 | 56 | 57 | 57 | 57 | 57 | 58 | 58 | 58 | 58 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 67 | 52 |
| 2 | 67 | 52 |
| 3 | 67 | 52 |
| 4 | 67 | 52 |
| 5 | 68 | 52 |
| 6 | 68 | 53 |
| 7 | 68 | 53 |
| 8 | 68 | 53 |
| 9 | 68 | 53 |
| 10 | 68 | 53 |
| 11 | 69 | 53 |
| 12 | 69 | 53 |
| 13 | 69 | 54 |
| 14 | 69 | 54 |
| 15 | 69 | 54 |
| 16 | 69 | 55 |
| 17 | 70 | 55 |
| 18 | 70 | 55 |
| 19 | 70 | 55 |
| 20 | 70 | 56 |
| 21 | 71 | 56 |
| 22 | 71 | 56 |
| 23 | 71 | 56 |
| 24 | 71 | 57 |
| 25 | 71 | 57 |
| 26 | 72 | 57 |
| 27 | 72 | 57 |
| 28 | 72 | 58 |
| 29 | 72 | 58 |
| 30 | 73 | 58 |
| 31 | 73 | 58 |
How March really feels in St. Marys
Once humidity and wind are folded in, March averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
March 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 March compares with the rest of the year at a glance. March is the 9th-warmest and 7th-wettest month here — the current month is highlighted below.
| 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 March
The sky is clear or mostly clear about 40% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 16% of March, with mostly cloudy or overcast conditions the remaining 44%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 54 | 55 | 55 | 55 | 56 | 55 | 56 | 56 | 55 | 55 | 55 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 56 | 56 | 56 | 56 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 57 |
| Cloudier (%) | 46 | 45 | 45 | 45 | 44 | 45 | 44 | 44 | 45 | 45 | 45 | 44 | 45 | 45 | 45 | 45 | 45 | 45 | 44 | 44 | 44 | 44 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 54 | 46 |
| 2 | 55 | 45 |
| 3 | 55 | 45 |
| 4 | 55 | 45 |
| 5 | 56 | 44 |
| 6 | 55 | 45 |
| 7 | 56 | 44 |
| 8 | 56 | 44 |
| 9 | 55 | 45 |
| 10 | 55 | 45 |
| 11 | 55 | 45 |
| 12 | 56 | 44 |
| 13 | 55 | 45 |
| 14 | 55 | 45 |
| 15 | 55 | 45 |
| 16 | 55 | 45 |
| 17 | 55 | 45 |
| 18 | 55 | 45 |
| 19 | 56 | 44 |
| 20 | 56 | 44 |
| 21 | 56 | 44 |
| 22 | 56 | 44 |
| 23 | 57 | 43 |
| 24 | 57 | 43 |
| 25 | 57 | 43 |
| 26 | 57 | 43 |
| 27 | 57 | 43 |
| 28 | 57 | 43 |
| 29 | 57 | 43 |
| 30 | 57 | 43 |
| 31 | 57 | 43 |
Chance of precipitation in March
St. Marys gets around 2.8 in of rain over 7.3 wet days in March. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 23% and peaks near 25% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 25 | 24 | 24 | 24 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Rain chance (%) | |
|---|---|
| 1 | 25 |
| 2 | 24 |
| 3 | 24 |
| 4 | 24 |
| 5 | 23 |
| 6 | 23 |
| 7 | 22 |
| 8 | 22 |
| 9 | 22 |
| 10 | 22 |
| 11 | 22 |
| 12 | 22 |
| 13 | 22 |
| 14 | 23 |
| 15 | 23 |
| 16 | 23 |
| 17 | 23 |
| 18 | 23 |
| 19 | 23 |
| 20 | 24 |
| 21 | 24 |
| 22 | 24 |
| 23 | 24 |
| 24 | 24 |
| 25 | 24 |
| 26 | 24 |
| 27 | 24 |
| 28 | 24 |
| 29 | 24 |
| 30 | 24 |
| 31 | 24 |
Humidity in March
Most of March feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the dry band about 56% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 63 | 64 | 65 | 65 | 65 | 65 | 64 | 64 | 63 | 63 | 61 | 60 | 58 | 58 | 57 | 56 | 55 | 55 | 54 | 52 | 52 | 50 | 50 | 49 | 49 | 48 | 47 | 46 | 46 | 45 | 44 |
| Comfortable (%) | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 20 | 20 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 |
| Humid (%) | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 19 | 19 | 20 | 20 | 21 | 21 | 21 | 22 | 22 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 |
| Muggy (%) | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 7 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 63 | 18 | 18 | 1 |
| 2 | 64 | 18 | 17 | 1 |
| 3 | 65 | 18 | 17 | 0 |
| 4 | 65 | 18 | 17 | 0 |
| 5 | 65 | 18 | 17 | 0 |
| 6 | 65 | 18 | 17 | 0 |
| 7 | 64 | 19 | 17 | 0 |
| 8 | 64 | 19 | 17 | 0 |
| 9 | 63 | 20 | 17 | 0 |
| 10 | 63 | 20 | 17 | 0 |
| 11 | 61 | 21 | 18 | 0 |
| 12 | 60 | 21 | 18 | 1 |
| 13 | 58 | 22 | 19 | 1 |
| 14 | 58 | 22 | 19 | 1 |
| 15 | 57 | 22 | 20 | 1 |
| 16 | 56 | 23 | 20 | 1 |
| 17 | 55 | 23 | 21 | 1 |
| 18 | 55 | 23 | 21 | 1 |
| 19 | 54 | 23 | 21 | 2 |
| 20 | 52 | 24 | 22 | 2 |
| 21 | 52 | 24 | 22 | 2 |
| 22 | 50 | 24 | 23 | 3 |
| 23 | 50 | 24 | 23 | 3 |
| 24 | 49 | 24 | 23 | 4 |
| 25 | 49 | 24 | 23 | 4 |
| 26 | 48 | 24 | 24 | 4 |
| 27 | 47 | 24 | 24 | 5 |
| 28 | 46 | 24 | 24 | 5 |
| 29 | 46 | 25 | 24 | 6 |
| 30 | 45 | 25 | 24 | 6 |
| 31 | 44 | 25 | 24 | 7 |
Wind in March
Winds average 9 mph in March, the windiest month of the year.
Across March, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 9 | light breeze |
| 2 | 9 | light breeze |
| 3 | 9 | light breeze |
| 4 | 9 | light breeze |
| 5 | 9 | light breeze |
| 6 | 9 | light breeze |
| 7 | 9 | light breeze |
| 8 | 9 | light breeze |
| 9 | 9 | light breeze |
| 10 | 9 | light breeze |
| 11 | 9 | light breeze |
| 12 | 9 | light breeze |
| 13 | 9 | light breeze |
| 14 | 9 | light breeze |
| 15 | 9 | light breeze |
| 16 | 9 | light breeze |
| 17 | 9 | light breeze |
| 18 | 9 | light breeze |
| 19 | 9 | light breeze |
| 20 | 9 | light breeze |
| 21 | 9 | light breeze |
| 22 | 9 | light breeze |
| 23 | 9 | light breeze |
| 24 | 9 | light breeze |
| 25 | 9 | light breeze |
| 26 | 9 | light breeze |
| 27 | 9 | light breeze |
| 28 | 9 | light breeze |
| 29 | 9 | light breeze |
| 30 | 9 | light breeze |
| 31 | 9 | light breeze |
Sunrise & sunset in March
Daylight runs from about 11 h 18 min at the start of March to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 54 minutes over March. Sunrise moves from 7:00 AM to 6:24 AM, and sunset from 6:18 PM to 6:39 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.3 | 11.3 | 11.4 | 11.4 | 11.4 | 11.5 | 11.5 | 11.5 | 11.5 | 11.6 | 11.6 | 11.6 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 |
| Sunrise (AM) | 7:00 | 6:59 | 6:58 | 6:57 | 6:56 | 6:55 | 6:54 | 6:52 | 6:51 | 6:50 | 6:49 | 6:48 | 6:46 | 6:45 | 6:44 | 6:43 | 6:42 | 6:40 | 6:39 | 6:38 | 6:36 | 6:35 | 6:34 | 6:33 | 6:31 | 6:30 | 6:29 | 6:28 | 6:26 | 6:25 | 6:24 |
| Sunset (PM) | 6:18 | 6:19 | 6:20 | 6:21 | 6:21 | 6:22 | 6:23 | 6:23 | 6:24 | 6:25 | 6:26 | 6:26 | 6:27 | 6:28 | 6:28 | 6:29 | 6:30 | 6:30 | 6:31 | 6:32 | 6:32 | 6:33 | 6:33 | 6:34 | 6:35 | 6:35 | 6:36 | 6:37 | 6:37 | 6:38 | 6:39 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.3 | 7:00 | 6:18 |
| 2 | 11.3 | 6:59 | 6:19 |
| 3 | 11.4 | 6:58 | 6:20 |
| 4 | 11.4 | 6:57 | 6:21 |
| 5 | 11.4 | 6:56 | 6:21 |
| 6 | 11.5 | 6:55 | 6:22 |
| 7 | 11.5 | 6:54 | 6:23 |
| 8 | 11.5 | 6:52 | 6:23 |
| 9 | 11.5 | 6:51 | 6:24 |
| 10 | 11.6 | 6:50 | 6:25 |
| 11 | 11.6 | 6:49 | 6:26 |
| 12 | 11.6 | 6:48 | 6:26 |
| 13 | 11.7 | 6:46 | 6:27 |
| 14 | 11.7 | 6:45 | 6:28 |
| 15 | 11.7 | 6:44 | 6:28 |
| 16 | 11.8 | 6:43 | 6:29 |
| 17 | 11.8 | 6:42 | 6:30 |
| 18 | 11.8 | 6:40 | 6:30 |
| 19 | 11.9 | 6:39 | 6:31 |
| 20 | 11.9 | 6:38 | 6:32 |
| 21 | 11.9 | 6:36 | 6:32 |
| 22 | 12.0 | 6:35 | 6:33 |
| 23 | 12.0 | 6:34 | 6:33 |
| 24 | 12.0 | 6:33 | 6:34 |
| 25 | 12.1 | 6:31 | 6:35 |
| 26 | 12.1 | 6:30 | 6:35 |
| 27 | 12.1 | 6:29 | 6:36 |
| 28 | 12.2 | 6:28 | 6:37 |
| 29 | 12.2 | 6:26 | 6:37 |
| 30 | 12.2 | 6:25 | 6:38 |
| 31 | 12.2 | 6:24 | 6:39 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 4.96 kWh/m².
For context, solar energy here swings from a low near 2.74 kWh/m² to a high of 6.45 kWh/m² in May across the year — March's 4.96 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.4 | 4.4 | 4.5 | 4.5 | 4.6 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.5 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.4 | Bright |
| 2 | 4.4 | Bright |
| 3 | 4.5 | Bright |
| 4 | 4.5 | Bright |
| 5 | 4.6 | Bright |
| 6 | 4.7 | Bright |
| 7 | 4.7 | Bright |
| 8 | 4.7 | Bright |
| 9 | 4.8 | Bright |
| 10 | 4.8 | Bright |
| 11 | 4.8 | Bright |
| 12 | 4.9 | Bright |
| 13 | 4.9 | Bright |
| 14 | 4.9 | Bright |
| 15 | 5.0 | Bright |
| 16 | 5.0 | Bright |
| 17 | 5.0 | Bright |
| 18 | 5.0 | Bright |
| 19 | 5.0 | Bright |
| 20 | 5.1 | Bright |
| 21 | 5.1 | Bright |
| 22 | 5.1 | Bright |
| 23 | 5.2 | Bright |
| 24 | 5.2 | Bright |
| 25 | 5.3 | Bright |
| 26 | 5.3 | Bright |
| 27 | 5.3 | Bright |
| 28 | 5.4 | Bright |
| 29 | 5.4 | Bright |
| 30 | 5.4 | Bright |
| 31 | 5.5 | Bright |
Hazard calendar for St. Marys
In March, St. Marys sits inside 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 March a good time to visit St. Marys?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is one of the better times to visit St. Marys for general sightseeing.
What to pack for St. Marys in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, St. Marys sees daytime highs around 70°F and nights near 55°F. Worth packing: sun protection. About 7 days see rain.
Sea temperature near St. Marys in March
The nearest coast averages about 63°F in March — 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 March
Clear-sky midday UV in March peaks 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 March
Average fine-particle pollution (PM2.5) through the year — so you can see where March 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).