Climate and monthly weather forecastSaint Marys, GA
Climate and monthly weather forecast
The climate of Saint Marys
Saint Marys in Georgia, USA is predominantly characterized by a humid subtropical climate without a dry season - a condition classified as Cfa under the Köppen climate classification system. This climatic condition is largely influenced by the city's geographical positioning. Throughout the year, temperatures in Saint Marys display a significant annual range. The lowest average monthly temperature, 47.7°F (8.7°C), typically occurs in January, while the highest, averaging 90.1°F (32.3°C), is usually in July.Humidity is fairly consistent through the year, typically averaging between 71% to 77%. This creates a humid environment that is characteristic of Saint Marys. The number of rainfall days varies noticeably, from a minimum of 8.3 in February to a maximum of 23.9 in August. The incorporation of this data paints a picture of a locale in which certain months are more rainfall-inundated than others.
The highest average rainfall, 3.9" (99mm), is recorded in August. The lowest, 0.67" (17mm), occurs in January. Discrepancies in rainfall figures evoke a rhythm within Saint Marys's climatic pattern; a melody of the driest months giving way to the wettest. Snowfall, however, is a rare occurrence in Saint Marys. Monthly averages on sunshine hours span from 5.8 hours in December to 10.9 in July. Being the most pervasive element in this climatic ensemble, sunshine hours are in direct correlation with the number of sunshine days and UV index, both of which are highest from June to July.
The best time to visit Saint Marys
The optimal period for visiting Saint Marys, Georgia largely depends on personal preference regarding climate conditions. However, for those who relish moderate temperatures and plentiful sunshine, it is advisable to visit between April and May. During these months, temperatures fluctuate from a modest 62.4°F (16.9°C) to 71.1°F (21.7°C). This is complemented by between 9.4 to 10.6 hours of daily sunshine. A relatively low number of rainfall days, roughly ranging from 11.2 to 13 days, further appeals to the preferences of most tourists.The worst time to visit Saint Marys
Conversely, those planning a visit to Saint Marys may want to avoid the peak of the summer from June through August. These months are characterized by extremely high temperatures with averages soaring to between 88.3°F (31.3°C) and 90.1°F (32.3°C). Additionally, humidity levels are at their highest, which, in combination with high temperatures, can result in discomfort. The months of June, July, and August also record the highest average rainfall, spanning from 3.19" (81mm) to 3.9" (99mm).Spring weather in Saint Marys
Spring in Saint Marys, Georgia, which spans from March through May, forecasts moderate temperatures between 55.4°F (13°C) and 71.1°F (21.7°C). Spring unveils an increase in daily sunshine hours with averages hovering from 8 to 9.4 hours. Correspondingly, the UV index climbs, reaching up to 6 in May. Rainfall during this period follows an upward trend, increasing from 0.98" (25mm) to 1.42" (36mm) from March to May.Summer weather in Saint Marys
June marks the beginning of summer in Saint Marys. Temperature values surge markedly from 83.7°F (28.7°C) in June to 90.1°F (32.3°C) in July. Meanwhile, the city experiences its highest levels of humidity, rising to as much as 77% in August. Summer in Saint Marys sees a drastic increment in rainfall. June initiates the wet phase with an average of 3.19" (81mm) which agonizingly inflates to 3.9" (99mm) in August.Autumn weather in Saint Marys
Autumn graces Saint Marys in September with temperatures gradually tapering from 85.8°F (29.9°C) in September to 70.7°F (21.5°C) in November. Concurrently, average daylight hours decline from 12.3 in September to a mere 10.6 in November. A notable downward trend is also evident in the number of rainfall days, which diminish from 18.5 in September to 8.5 by November.Winter weather in Saint Marys
Winter occupies the final chapter of the annual climatic saga in Saint Marys. A characteristic trait of this season is the relatively mild temperatures from 52.5°F (11.4°C) to 47.7°F (8.7°C). During this period, rainfall is less frequent, with averages sidelined between 1.1" (28mm) and 0.67" (17mm). The number of daylight hours descends to its annual nadir of 10.2 hours in December. Correspondingly, winter in Saint Marys records the shortest sunshine duration with only 5.8 hours in December. Despite the chilly atmosphere, the city remains interestingly devoid of snowfall all year round.Weather in January
Saint Marys, Georgia, commences the year with relatively cool conditions. A slower pace sets in as the winds drop marginally from December's. Skies in January tend to be more cloud-covered than in December. The days are short, with less sunshine and daylight hours than the later months. Weather in January »Weather in February
February initiates a subtle shift towards spring. The winds ease up slightly more, and relative humidity levels pick up from the first month of the year. Despite the slightly higher cloud coverage, daylight hours start to extend, hinting at incoming spring. Weather in February »Weather in March
March in Saint Marys, Georgia, signals more noticeable spring features. Rainfall increases from the previous month, with brief showers adding to the charm of the city. In contrast to February, cloud coverage decreases, offering clearer skies. Weather in March »Weather in April
April delivers a pronounced switch to warmer conditions. Following March, the humidity remains relatively consistent, ensuring a comfortable atmosphere. Simultaneously, the combined reduction in cloud coverage and an increased number of sunlight hours make for appealing spring days. Weather in April »Weather in May
May embraces full-blown spring in Saint Marys, Georgia. Even though there's a slight decline in wind speed from April, the breezes maintain a comforting freshness. Rainfall levels rise, nurturing the verdant surroundings. The UV index peaks, calling for some sun protection. Weather in May »Weather in June
June marks the onset of summer. In contrast to May, the number of days with significant rains escalates dramatically. Surprisingly, June sees an increase in daily sunshine with longer daylight hours. While the UV index remains high, reflecting the intensity of the summer sun, temperatures average between 73.9°F (23.3°C) and 88.3°F (31.3°C), marking this as the start of the hottest period. May's transformation into June witnesses an average high-temperature of a hot 88.3°F (31.3°C), noting a minor change from the preceding month. Weather in June »Weather in July
July stands as the pinnacle of high summer in Saint Marys. The humidity, rainfall and cloud coverage all increase from June, contributing to a distinct sultry climate. The UV index stays constant, reinforcing the hot conditions. Despite shorter daylight hours, the strong sun brings plenty of heat with temperatures registering between 76.3°F (24.6°C) and 90.1°F (32.3°C), the hottest for the year. July is the month when Saint Marys's temperatures reach their peak, with averages of 90.1°F (32.3°C) and lows of 76.3°F (24.6°C). The average heat index in July is evaluated at an extremely hot 109.4°F (43°C). Weather in July »Weather in August
August holds on to the summer weather pattern despite showing signs of transition into autumn. Weather parameters remain relatively constant with July; however, daylight hours start to recede. Though sunshine hours decrease slightly, the UV index remains high. Weather in August »Weather in September
September marks the shift into autumn. The weather starts to cool down, and rainfall reduces significantly from August, lending a drier climate. Cloud coverage begins to increase, yet the daylight and sunshine hours endure, granting sufficient warmth. Weather in September »Weather in October
October in Saint Marys, Georgia sees continued cooling. Average wind speeds pick up from September, bringing a refreshing contrast to the preceding months' calm. Humidity and cloud coverage remain steady, while the UV index falls, indicating lesser sun strength. Weather in October »Weather in November
November further advances the trend of cooling temperatures. The rainfall reduces dramatically compared to October, paving the way for drier days. Sunshine hours continue to fall, leading to shorter days. A rise in the mean wind speed is also observed. Weather in November »Weather in December
December welcomes winter with a significant drop in temperature. There's an increase in cloud coverage from November, lending to gloomier skies. The humidity continues to rise, albeit the month receives less rainfall. As the end of the year approaches, Saint Marys experiences the colder side of the spectrum with temperatures swinging from 52.5°F (11.4°C) to 65.5°F (18.6°C). The advent of December presents an average high-temperature of an enjoyable 65.5°F (18.6°C), maintaining a close correlation with the preceding month. Weather in December »Updated: Aug 9, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January stands out as Saint Marys's coldest month, with an average high-temperature of 61.5°F (16.4°C) and a low-temperature of 47.7°F (8.7°C).
The month with the least rainfall is January, when the rain falls for 8.4 days and typically collects 0.67" (17mm) of precipitation.
Throughout the year, there are 165.4 rainfall days, and 23.15" (588mm) of precipitation is accumulated.
In Saint Marys, snow does not fall in January, March through December.
Throughout the year, there are 0.1 snowfall days.
January and December, with an average maximum UV index of 4, are months with the lowest UV index.
February is the only month when snow falls.
February has the most snowfall days of the year. Snow falls for 0.1 days.
With an average relative humidity of 71%, March is the least humid month.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
May through August, with an average maximum UV index of 7, are months with the highest UV index in Saint Marys.
With an average of 14h and 6min of daylight, June has the longest days of the year.
July, noted for its average high-temperature of 90.1°F (32.3°C) and an average low-temperature of 76.3°F (24.6°C), is considered the warmest month.
July has the most sunshine of the year, with an average of 10.9h of sunshine.
The months with the highest humidity are August and December, with an average relative humidity of 77%.
The month with the most rainfall is August, when the rain falls for 23.9 days and typically aggregates up to 3.9" (99mm) of precipitation.
With an average of 10h and 12min of daylight, December has the shortest days of the year.
The month with the least sunshine is December, with an average of 5.8h of sunshine.
Average temperature
Saint Marys, GA
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (61.5°F).
The month with the highest average low temperature is August (76.8°F).
The coldest month (with the lowest average low temperature) is January (47.7°F).
Average pressure
Saint Marys, GA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
29.98"Hg
- Average pressure in July:
30.01"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed
Saint Marys, GA
- Average wind speed in January:
7.5mph - Average wind speed in February:
7.3mph - Average wind speed in March:
7.5mph - Average wind speed in April:
7.6mph - Average wind speed in May:
7mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
6mph - Average wind speed in August:
6mph - Average wind speed in September:
6.6mph - Average wind speed in October:
7.4mph - Average wind speed in November:
7.4mph - Average wind speed in December:
7.3mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity
Saint Marys, GA
The months with the highest relative humidity are August and December (77%).
The month with the lowest relative humidity is March (71%).
Average rainfall
Saint Marys, GA
- Average rainfall in January:
0.67" - Average rainfall in February:
0.94" - Average rainfall in March:
0.98" - Average rainfall in April:
1.42" - Average rainfall in May:
1.89" - Average rainfall in June:
3.19"
The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days
Saint Marys, GA
- Average rainfall days in January:
8.4 days - Average rainfall days in February:
8.3 days - Average rainfall days in March:
9.4 days - Average rainfall days in April:
11.2 days - Average rainfall days in May:
13 days - Average rainfall days in June:
20.3 days
- Average rainfall days in July:
22.8 days - Average rainfall days in August:
23.9 days - Average rainfall days in September:
18.5 days - Average rainfall days in October:
12.1 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
9 days
The month with the highest number of rainy days is August (23.9 days).
The month with the least rainy days is February (8.3 days).
Average snowfall days
Saint Marys, GA
- Average snowfall days in January:
0 days - Average snowfall days in February:
0.1 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight / Average sunshine
Saint Marys, GA
- Average daylight in January:
10h and 24min - Average daylight in February:
11h and 6min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 54min - Average daylight in May:
13h and 42min - Average daylight in June:
14h and 6min
- Average daylight in July:
13h and 54min - Average daylight in August:
13h and 12min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 24min - Average daylight in November:
10h and 36min - Average daylight in December:
10h and 12min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in January:
5h and 54min - Average sunshine in February:
7h and 30min - Average sunshine in March:
8h and 0min - Average sunshine in April:
9h and 24min - Average sunshine in May:
10h and 36min - Average sunshine in June:
10h and 48min
- Average sunshine in July:
10h and 54min - Average sunshine in August:
10h and 30min - Average sunshine in September:
8h and 36min - Average sunshine in October:
7h and 0min - Average sunshine in November:
6h and 6min - Average sunshine in December:
5h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days
Saint Marys, GA
- Average sunshine days in January:
20.8 days - Average sunshine days in February:
18.1 days - Average sunshine days in March:
20 days - Average sunshine days in April:
16.8 days - Average sunshine days in May:
15.4 days - Average sunshine days in June:
7.5 days
- Average sunshine days in July:
4.9 days - Average sunshine days in August:
4.5 days - Average sunshine days in September:
8.7 days - Average sunshine days in October:
16.3 days - Average sunshine days in November:
18.1 days - Average sunshine days in December:
19.4 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is August (4.5 days).
Average UV index
Saint Marys, GA
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover
Saint Marys, GA
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 27).
Average visibility
Saint Marys, GA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
