Last updated: May 6, 2024
Under the Köppen–Geiger climate classification Bay Saint Louis features a humid subtropical climate (Cfa).Temperatures typically range between 12 °C (54 °F) and 28 °C (83 °F) through the year, but rarely can drop to -3 °C (26 °F) or can rise to as high as 33 °C (91 °F).The average annual precipitation amounts to about 1767 mm (69.6 inches) and receives 159 rainy days on the 1 mm (0.04 inches) threshold annually.Bay Saint Louis enjoys an average of 3261 hours of sunshine throughout the year, and daylight varies from 10 hours 12 minutes to 14 hours 3 minutes per day.
The warmest months in Bay Saint Louis are June, July and August, with daily mean temperatures ranging from 27 to 28 °C (81 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 12 to 15 °C (54 - 59 °F) throughout the day. On average each year, Bay Saint Louis experiences 138 days above 25 °C (77.0 °F) and 1 days below 0 °C (32.0 °F).
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Maximum | 23°C (74°F) | 23°C (74°F) | 26°C (79°F) | 26°C (80°F) | 29°C (85°F) | 31°C (89°F) | 33°C (91°F) | 33°C (91°F) | 33°C (91°F) | 30°C (87°F) | 25°C (77°F) | 22°C (72°F) |
Mean maximum | 20°C (68°F) | 20°C (69°F) | 23°C (75°F) | 25°C (77°F) | 28°C (83°F) | 30°C (86°F) | 32°C (90°F) | 32°C (89°F) | 31°C (88°F) | 29°C (84°F) | 24°C (75°F) | 21°C (69°F) |
Average high | 14°C (58°F) | 16°C (62°F) | 19°C (67°F) | 22°C (72°F) | 26°C (79°F) | 28°C (83°F) | 29°C (85°F) | 29°C (85°F) | 28°C (83°F) | 25°C (78°F) | 19°C (67°F) | 16°C (61°F) |
Daily mean | 12°C (54°F) | 15°C (59°F) | 18°C (64°F) | 20°C (69°F) | 24°C (76°F) | 27°C (81°F) | 28°C (82°F) | 28°C (83°F) | 27°C (80°F) | 23°C (75°F) | 17°C (63°F) | 14°C (58°F) |
Average low | 10°C (50°F) | 13°C (55°F) | 16°C (61°F) | 18°C (65°F) | 23°C (73°F) | 26°C (78°F) | 27°C (80°F) | 27°C (80°F) | 25°C (78°F) | 22°C (71°F) | 15°C (59°F) | 12°C (54°F) |
Mean minimum | 1°C (35°F) | 5°C (41°F) | 7°C (44°F) | 11°C (52°F) | 18°C (65°F) | 23°C (74°F) | 24°C (76°F) | 24°C (76°F) | 21°C (71°F) | 14°C (57°F) | 7°C (46°F) | 5°C (42°F) |
Minimum | -3°C (26°F) | -2°C (29°F) | 3°C (37°F) | 9°C (48°F) | 15°C (58°F) | 22°C (72°F) | 24°C (75°F) | 24°C (75°F) | 18°C (65°F) | 9°C (49°F) | 2°C (36°F) | 4°C (39°F) |
Compare temperature, precipitation, sunshine, UV index in Bay Saint Louis, Mississippi, United States with other places around the world.
Bay Saint Louis usually has the most precipitation in June, July and August, with an average of 19 rainy days and 240 mm (9.4 inches) of precipitation per month.The driest months in Bay Saint Louis are January, March and November. On average, 85 mm (3.3 inches) of precipitation falls during these months.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Average precipitation mm (inches) | 107 (4.2) | 122 (4.8) | 89 (3.5) | 126 (4.9) | 138 (5.4) | 279 (11.0) | 200 (7.9) | 239 (9.4) | 155 (6.1) | 133 (5.2) | 59 (2.3) | 120 (4.7) |
Average precipitation days (≥ 1 mm) | 10 | 13 | 11 | 9 | 12 | 19 | 20 | 20 | 14 | 12 | 7 | 12 |
The sunniest months in Bay Saint Louis are May, July and August, when the sun shines an average of 10 hours 15 minutes a day.Least sunny months in Bay Saint Louis: January, February and December receive an average of 6 hours 41 minutes of sunshine daily.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean monthly sunshine hours | 180 | 205 | 276 | 288 | 322 | 298 | 318 | 312 | 283 | 289 | 263 | 223 |
Mean daily daylight hours | 10h 25m | 11h 6m | 12h 0m | 12h 55m | 13h 41m | 14h 3m | 13h 51m | 13h 10m | 12h 18m | 11h 23m | 10h 36m | 10h 12m |
Bay Saint Louis experiences the highest level of ultraviolet (UV) radiation in April, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Bay Saint Louis UV Index data.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
UV Index (month maximum) | 5 | 8 | 9 | 11 | 11 | 11 | 12 | 11 | 10 | 8 | 6 | 4 |