West Sayville · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
West Sayville & 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
82°
Thu, Sep 17
Coldest night
60°
Fri, Sep 18
Days with precip
2 / 14
of 14 forecast days
Nicest day
Sat, Sep 12
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
79° 63°
43% precip chance
Sat 12 – Sun 13 Sep
75° 60°
6% precip chance
Sat 19 – Sun 20 Sep
77° 65°
typical range
Sat 26 – Sun 27 Sep
79° 66°
typical range
30 days — West Sayville
14 forecast + 16 climatology
Sat · Today Sunny
79°64°0.4 mm⌄
Wind12 mph NW
Gusts21 mph
UV index7 – High
Precip chance36%
Sunrise06:23
Sunset19:18
Sun · Tomorrow Showers
72°63°1.0 mm⌄
Wind11 mph E
Gusts15 mph
UV index7 – High
Precip chance43%
Sunrise06:24
Sunset19:17
Monday 7/9 Sunny
77°64°2%⌄
Wind11 mph W
Gusts18 mph
UV index6 – High
Precip chance2%
Sunrise06:25
Sunset19:15
Tuesday 8/9 Mostly cloudy
80°67°8%⌄
Wind11 mph W
Gusts19 mph
UV index6 – High
Precip chance8%
Sunrise06:26
Sunset19:13
Wednesday 9/9 Mostly cloudy
77°68°15%⌄
Wind22 mph SW
Gusts40 mph
UV index6 – High
Precip chance15%
Sunrise06:27
Sunset19:12
Thursday 10/9 Mostly cloudy
82°70°11%⌄
Wind23 mph SW
Gusts44 mph
UV index7 – High
Precip chance11%
Sunrise06:28
Sunset19:10
Friday 11/9 Sunny
72°60°2%⌄
Wind14 mph N
Gusts21 mph
UV index6 – High
Precip chance2%
Sunrise06:29
Sunset19:08
Saturday 12/9 Sunny
72°60°3%⌄
Wind11 mph S
Gusts18 mph
UV index6 – High
Precip chance3%
Sunrise06:30
Sunset19:07
Sunday 13/9 Sunny
75°68°6%⌄
Wind12 mph SW
Gusts23 mph
UV index6 – High
Precip chance6%
Sunrise06:31
Sunset19:05
Monday 14/9 Sunny
73°66°5%⌄
Wind13 mph SW
Gusts27 mph
UV index6 – High
Precip chance5%
Sunrise06:32
Sunset19:03
Tuesday 15/9 Sunny
76°65°5%⌄
Wind12 mph SW
Gusts23 mph
UV index6 – High
Precip chance5%
Sunrise06:33
Sunset19:02
Wednesday 16/9 Sunny
76°69°8%⌄
Wind13 mph SW
Gusts25 mph
UV index6 – High
Precip chance8%
Sunrise06:34
Sunset19:00
Thursday 17/9 Sunny
82°70°1.2 mm⌄
Wind13 mph SW
Gusts26 mph
UV index7 – High
Precip chance57%
Sunrise06:35
Sunset18:58
Friday 18/9 Showers
72°60°3.1 mm⌄
Wind18 mph E
Gusts26 mph
UV index5 – Moderate
Precip chance84%
Sunrise06:36
Sunset18:56
Saturday 19/9 Light rain (climatological)
76°65°0.8 mm⌄
Day≈71–81°
Night≈60–71°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
77°66°20%⌄
Day≈71–82°
Night≈60–71°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
80°68°20%⌄
Day≈74–85°
Night≈62–73°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Light rain (climatological)
79°67°1.9 mm⌄
Day≈73–84°
Night≈62–72°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
74°64°20%⌄
Day≈69–80°
Night≈59–70°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
70°62°20%⌄
Day≈64–75°
Night≈56–67°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Light rain (climatological)
74°64°1.8 mm⌄
Day≈69–80°
Night≈59–70°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
77°66°20%⌄
Day≈72–83°
Night≈61–71°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
79°67°20%⌄
Day≈74–84°
Night≈62–73°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Light rain (climatological)
83°70°1.3 mm⌄
Day≈78–88°
Night≈64–75°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
78°66°20%⌄
Day≈72–83°
Night≈61–72°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
74°64°20%⌄
Day≈69–79°
Night≈59–69°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Light rain (climatological)
59°51°1.8 mm⌄
Day≈54–64°
Night≈46–57°
Precip≈0.6 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Partly cloudy (climatological)
60°52°20%⌄
Day≈54–65°
Night≈46–57°
Precip≈0.6 in / October
(climatological)Typical range for these dates · 1991–2020
Saturday 3/10 Partly cloudy (climatological)
64°54°20%⌄
Day≈59–69°
Night≈49–60°
Precip≈0.6 in / October
(climatological)Typical range for these dates · 1991–2020
Sunday 4/10 Light rain (climatological)
70°58°1.6 mm⌄
Day≈65–75°
Night≈52–63°
Precip≈0.6 in / October
(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 West Sayville, 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.