Bay Saint Louis · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Bay Saint Louis & neighbors — hit play
Every city on the map carries real forecast data from the same models as its city page, refreshed several times a day. The icon is the day's overall look; the number is the afternoon high.
Next 14 days at a glance
from the model forecast
Hottest day
89°
Sat, Aug 29
Coldest night
74°
Fri, Sep 11
Days with precip
5 / 14
of 14 forecast days
Nicest day
Tue, Sep 1
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
89° 79°
80% precip chance
Sat 5 – Sun 6 Sep
85° 82°
21% precip chance
Sat 12 – Sun 13 Sep
87° 79°
typical range
Sat 19 – Sun 20 Sep
87° 78°
typical range
30 days — Bay Saint Louis
14 forecast + 16 climatology
Sat · Today Mostly cloudy
89°79°0.4 mm⌄
Wind17 mph SE
Gusts22 mph
UV index10 – Very high
Precip chance37%
Sunrise06:32
Sunset19:24
Sun · Tomorrow Showers
83°80°11.3 mm⌄
Wind16 mph SE
Gusts18 mph
UV index9 – Very high
Precip chance80%
Sunrise06:33
Sunset19:22
Monday 31/8 Showers
84°82°4.8 mm⌄
Wind14 mph SE
Gusts21 mph
UV index10 – Very high
Precip chance69%
Sunrise06:33
Sunset19:21
Tuesday 1/9 Sunny
84°81°10%⌄
Wind9 mph SE
Gusts20 mph
UV index10 – Very high
Precip chance10%
Sunrise06:34
Sunset19:20
Wednesday 2/9 Mostly cloudy
85°80°2.9 mm⌄
Wind10 mph E
Gusts18 mph
UV index7 – High
Precip chance69%
Sunrise06:34
Sunset19:19
Thursday 3/9 Showers
85°82°1.0 mm⌄
Wind11 mph S
Gusts12 mph
UV index7 – High
Precip chance57%
Sunrise06:35
Sunset19:18
Friday 4/9 Partly cloudy
85°81°0.2 mm⌄
Wind15 mph SE
Gusts21 mph
UV index7 – High
Precip chance27%
Sunrise06:35
Sunset19:16
Saturday 5/9 Partly cloudy
85°82°21%⌄
Wind11 mph E
Gusts17 mph
UV index7 – High
Precip chance21%
Sunrise06:36
Sunset19:15
Sunday 6/9 Sunny
85°82°8%⌄
Wind11 mph S
Gusts18 mph
UV index7 – High
Precip chance8%
Sunrise06:36
Sunset19:14
Monday 7/9 Sunny
85°80°8%⌄
Wind10 mph S
Gusts15 mph
UV index7 – High
Precip chance8%
Sunrise06:37
Sunset19:13
Tuesday 8/9 Sunny
86°78°9%⌄
Wind11 mph SW
Gusts21 mph
UV index7 – High
Precip chance9%
Sunrise06:38
Sunset19:11
Wednesday 9/9 Sunny
85°79°8%⌄
Wind14 mph S
Gusts18 mph
UV index7 – High
Precip chance8%
Sunrise06:38
Sunset19:10
Thursday 10/9 Sunny
87°80°17%⌄
Wind14 mph NW
Gusts26 mph
UV index8 – Very high
Precip chance17%
Sunrise06:39
Sunset19:09
Friday 11/9 Sunny
83°74°1.1 mm⌄
Wind13 mph SW
Gusts17 mph
UV index7 – High
Precip chance57%
Sunrise06:39
Sunset19:08
Saturday 12/9 Rain (climatological)
84°79°4.4 mm⌄
Day≈78–89°
Night≈73–84°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
87°81°20%⌄
Day≈82–93°
Night≈76–86°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
85°79°20%⌄
Day≈79–90°
Night≈74–85°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
85°80°6.0 mm⌄
Day≈80–91°
Night≈74–85°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
80°76°20%⌄
Day≈74–85°
Night≈71–82°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
74°73°20%⌄
Day≈69–80°
Night≈68–79°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
78°75°3.4 mm⌄
Day≈73–83°
Night≈70–81°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
83°78°20%⌄
Day≈77–88°
Night≈73–84°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
87°81°20%⌄
Day≈82–92°
Night≈75–86°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
84°79°4.2 mm⌄
Day≈79–90°
Night≈74–85°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
85°80°20%⌄
Day≈80–91°
Night≈74–85°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
78°75°20%⌄
Day≈72–83°
Night≈70–81°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
79°76°3.9 mm⌄
Day≈74–84°
Night≈71–81°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
77°75°20%⌄
Day≈71–82°
Night≈69–80°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
79°76°20%⌄
Day≈74–85°
Night≈71–82°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Rain (climatological)
84°79°3.6 mm⌄
Day≈79–90°
Night≈74–85°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
How does a 30-day outlook work?
The first 14 days are a live model forecast. The back half of the month shows the typical range for those dates — useful for planning, not a literal prediction.
First 14 days: a real forecast, blended from NBM, ECMWF and GFS runs. Trust it most inside three days; by the second week treat it as a lean, not a promise.
Rest of the month: past day 14 we stop pretending to forecast and switch to the climate corridor — the range those dates have produced over three decades computed directly for Bay Saint Louis, with mild week-to-week wiggle.
Good question for this page: "Is late August usually humid in Chicago?" Bad question: "Do I need an umbrella on the 29th?" — three weeks out no one knows, and that's the honest answer.