West Lake Sammamish · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
West Lake Sammamish & 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
83°
Thu, Sep 10
Coldest night
47°
Sun, Sep 13
Days with precip
1 / 14
of 14 forecast days
Nicest day
Sun, Sep 13
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
75° 48°
81% precip chance
Sat 12 – Sun 13 Sep
71° 47°
9% precip chance
Sat 19 – Sun 20 Sep
77° 52°
typical range
Sat 26 – Sun 27 Sep
79° 52°
typical range
30 days — West Lake Sammamish
14 forecast + 16 climatology
Sat · Today Heavy rain
72°52°155.6 mm⌄
Wind5 mph NW
Gusts15 mph
UV index5 – Moderate
Precip chance81%
Sunrise06:32
Sunset19:41
Sun · Tomorrow Sunny
75°48°8%⌄
Wind8 mph NW
Gusts17 mph
UV index5 – Moderate
Precip chance8%
Sunrise06:33
Sunset19:39
Monday 7/9 Sunny
74°50°6%⌄
Wind5 mph SW
Gusts15 mph
UV index4 – Moderate
Precip chance6%
Sunrise06:35
Sunset19:37
Tuesday 8/9 Mostly cloudy
74°52°16%⌄
Wind6 mph N
Gusts15 mph
UV index4 – Moderate
Precip chance16%
Sunrise06:36
Sunset19:35
Wednesday 9/9 Mostly cloudy
80°52°0.4 mm⌄
Wind7 mph N
Gusts13 mph
UV index6 – High
Precip chance36%
Sunrise06:37
Sunset19:33
Thursday 10/9 Sunny
83°55°3%⌄
Wind4 mph NW
Gusts15 mph
UV index7 – High
Precip chance3%
Sunrise06:39
Sunset19:31
Friday 11/9 Mostly cloudy
76°53°11%⌄
Wind11 mph SW
Gusts15 mph
UV index5 – Moderate
Precip chance11%
Sunrise06:40
Sunset19:29
Saturday 12/9 Sunny
68°50°9%⌄
Wind7 mph SW
Gusts14 mph
UV index6 – High
Precip chance9%
Sunrise06:41
Sunset19:27
Sunday 13/9 Sunny
71°47°5%⌄
Wind4 mph NW
Gusts14 mph
UV index6 – High
Precip chance5%
Sunrise06:43
Sunset19:25
Monday 14/9 Sunny
75°49°4%⌄
Wind4 mph NW
Gusts15 mph
UV index6 – High
Precip chance4%
Sunrise06:44
Sunset19:23
Tuesday 15/9 Mostly cloudy
76°50°6%⌄
Wind6 mph NW
Gusts15 mph
UV index5 – Moderate
Precip chance6%
Sunrise06:45
Sunset19:21
Wednesday 16/9 Mostly cloudy
75°51°10%⌄
Wind4 mph S
Gusts14 mph
UV index5 – Moderate
Precip chance10%
Sunrise06:47
Sunset19:19
Thursday 17/9 Mostly cloudy
74°54°10%⌄
Wind5 mph W
Gusts14 mph
UV index6 – High
Precip chance10%
Sunrise06:48
Sunset19:17
Friday 18/9 Mostly cloudy
70°53°13%⌄
Wind6 mph SW
Gusts15 mph
UV index5 – Moderate
Precip chance13%
Sunrise06:49
Sunset19:15
Saturday 19/9 Rain (climatological)
76°52°40.0 mm⌄
Day≈71–81°
Night≈47–57°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
77°53°20%⌄
Day≈72–83°
Night≈47–58°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
76°52°20%⌄
Day≈71–82°
Night≈47–58°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Rain (climatological)
77°53°20.0 mm⌄
Day≈72–83°
Night≈47–58°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
73°50°20%⌄
Day≈67–78°
Night≈44–55°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
70°48°20%⌄
Day≈64–75°
Night≈43–54°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Rain (climatological)
68°47°22.0 mm⌄
Day≈63–74°
Night≈42–53°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
75°52°20%⌄
Day≈70–81°
Night≈46–57°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
79°54°20%⌄
Day≈73–84°
Night≈48–59°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Rain (climatological)
80°55°28.0 mm⌄
Day≈75–85°
Night≈49–60°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
79°54°20%⌄
Day≈73–84°
Night≈48–59°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
73°50°20%⌄
Day≈68–79°
Night≈45–56°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Rain (climatological)
57°35°15.0 mm⌄
Day≈52–62°
Night≈30–40°
Precip≈11.8 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Partly cloudy (climatological)
54°33°20%⌄
Day≈48–59°
Night≈28–39°
Precip≈11.8 in / October
(climatological)Typical range for these dates · 1991–2020
Saturday 3/10 Partly cloudy (climatological)
58°36°20%⌄
Day≈53–64°
Night≈31–41°
Precip≈11.8 in / October
(climatological)Typical range for these dates · 1991–2020
Sunday 4/10 Rain (climatological)
62°38°34.0 mm⌄
Day≈56–67°
Night≈33–44°
Precip≈11.8 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 Lake Sammamish, 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.