St. Marys weather in January

In January, St. Marys sees average daytime highs of 62°F and overnight lows near 48°F, with 2.9 in of rain across 7.7 wet days and about 10.2 hours of daylight. It is the 12th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 62°F through the month. The sky is clear or mostly clear about 35% of the time in January, and the air most often feels dry.

Daylight stretches from about 10 hours at the start of January to 10 h 30 min by month's end. Set against the rest of the year, January is St. Marys's 6th-clearest and 2nd-windiest month. For the whole year in context, see St. Marys's year-round climate.

Daytime high
62°
12th warmest
Overnight low
48°
1st coldest
Rainfall
2.9 in
7.7 wet days
Daylight
10 h 12 min
7:29 AM – 5:42 PM
Cloud cover
55%
6th clearest
Wind
9 mph
2nd windiest
Solar energy
3.04 kWh/m²
Travel score
5.7
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 January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 62°F through the month.

A typical January day in St. Marys reaches about 62°F in the afternoon and slips back to 48°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 51°F and 72°F. Set against its neighbours, January runs about 2°F cooler than December and about 3°F cooler than February.

30°40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16349
26349
36349
46249
56248
66248
76248
86248
96248
106248
116248
126248
136247
146247
156247
166247
176247
186247
196247
206247
216247
226247
236247
246247
256247
266247
276247
286247
296248
306248
316248

How January really feels in St. Marys

Once humidity and wind are folded in, January 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.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

January 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 January compares with the rest of the year at a glance. January is the 12th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan62° / 48°2.97.710.25.7
Feb65° / 50°2.57.210.96.2
Mar70° / 55°2.87.311.87.0
Apr75° / 61°2.36.912.77.5
May82° / 68°2.58.513.56.6
Jun86° / 74°5.117.5144.3
Jul88° / 76°4.618.213.83.7
Aug87° / 76°5.820.413.13.7
Sep83° / 74°5.415.512.25.0
Oct78° / 66°3.28.911.27.1
Nov70° / 57°1.86.110.47.2
Dec64° / 51°2.57.4106.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24555
34654
44654
54654
64753
74852
84852
94951
105149
115248
125248
135347
145446
155446
165545
175545
185545
195446
205446
215446
225446
235446
245248
255248
265149
275050
285050
294951
304852
314852

Chance of precipitation in January

Any precipitation

St. Marys gets around 2.9 in of rain over 7.7 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
122
222
322
421
521
621
722
822
922
1022
1123
1223
1323
1424
1524
1625
1725
1825
1925
2026
2126
2226
2326
2427
2527
2627
2727
2827
2927
3027
3127

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 73% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16419134
26419134
36519124
46519124
56520123
66520123
76520123
86719113
96719113
106819112
117018102
127018102
13721792
14731791
15741691
16741691
17751681
18761581
19771571
20771571
21781570
22781570
23791470
24791470
25781570
26781570
27781570
28781570
29781570
30781570
31781570

Wind in January

Winds average 9 mph in January.

Across January, 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.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 hours at the start of January to 10 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over January. Sunrise moves from 7:28 AM to 7:24 AM, and sunset from 5:31 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.07:285:31
210.07:285:31
310.17:295:32
410.17:295:33
510.17:295:33
610.17:295:34
710.17:295:35
810.17:295:36
910.17:295:36
1010.17:295:37
1110.17:295:38
1210.27:295:39
1310.27:295:39
1410.27:295:40
1510.27:295:41
1610.27:295:42
1710.27:295:43
1810.27:295:44
1910.37:295:44
2010.37:285:45
2110.37:285:46
2210.37:285:47
2310.37:285:48
2410.47:275:49
2510.47:275:49
2610.47:275:50
2710.47:265:51
2810.47:265:52
2910.57:255:53
3010.57:255:54
3110.57:245:55

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.04 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 — January's 3.04 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.8Moderate
32.8Moderate
42.8Moderate
52.9Moderate
62.9Moderate
72.9Moderate
82.9Moderate
92.9Moderate
103.0Moderate
113.0Moderate
123.0Moderate
133.0Moderate
143.0Moderate
153.1Moderate
163.1Moderate
173.1Moderate
183.1Moderate
193.1Moderate
203.1Moderate
213.2Moderate
223.2Moderate
233.2Moderate
243.2Moderate
253.2Moderate
263.2Moderate
273.2Moderate
283.3Moderate
293.3Moderate
303.3Moderate
313.3Moderate
Planning a trip in January

Hazard calendar for St. Marys

In seasonPeak

In January, 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.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit St. Marys?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.7
Sightseeing
8th-best month of the year
1.2
Beach & pool
12th-best month of the year

January is a reasonable time to visit St. Marys for sightseeing.

What to pack for St. Marys in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, St. Marys sees daytime highs around 62°F and nights near 48°F. Worth packing: a warm layer. About 8 days see rain.

a warm layer

Sea temperature near St. Marys in January

The nearest coast averages about 61°F in January — 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.

60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan61Cool
Feb60Cool
Mar63Cool
Apr68Refreshing
May75Refreshing
Jun80Warm
Jul82Warm
Aug83Tropical
Sep82Warm
Oct77Warm
Nov70Refreshing
Dec64Cool

UV index in St. Marys in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 4 — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 22UV 10Dec 19UV 3
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr7High
May8Very high
Jun10Extreme
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in St. Marys in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1618 µg/m³Dec 127 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb13Moderate
Mar14Moderate
Apr14Moderate
May15Moderate
Jun16Moderate
Jul18Moderate
Aug16Moderate
Sep11Good
Oct8Good
Nov7Good
Dec7Good
Location & terrain

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.

2 miles
79 ft
10 miles
125 ft
50 miles
295 ft
treesgrasslandartificial surfaceswaterwetland
January weather nearby: Kingsland 9.9 mi · Jacksonville 29 mi · Brunswick 29 mi · Jacksonville Beach 32 mi · Ponte Vedra Beach 35 mi · Palm Valley 39 mi · Oakleaf Plantation 42 mi · Fruit Cove 43 mi

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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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).