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
29°
Wed, Sep 9
Coldest night
8°
Thu, Sep 17
Days with precip
2 / 14
of 14 forecast days
Nicest day
Fri, Sep 11
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
23° 9°
77% precip chance
Sat 12 – Sun 13 Sep
20° 9°
37% precip chance
Sat 19 – Sun 20 Sep
23° 10°
typical range
Sat 26 – Sun 27 Sep
24° 10°
typical range
30 days — West Lake Sammamish
14 forecast + 16 climatology
Fri · Today Showers
22°11°0.6 mm⌄
Wind4 mph NW
Gusts14 mph
UV index5 – Moderate
Precip chance42%
Sunrise06:31
Sunset19:43
Sat · Tomorrow Showers
23°9°5.7 mm⌄
Wind5 mph NW
Gusts15 mph
UV index5 – Moderate
Precip chance77%
Sunrise06:32
Sunset19:41
Sunday 6/9 Sunny
23°9°7%⌄
Wind7 mph NW
Gusts18 mph
UV index5 – Moderate
Precip chance7%
Sunrise06:33
Sunset19:39
Monday 7/9 Sunny
20°9°8%⌄
Wind8 mph SW
Gusts15 mph
UV index4 – Moderate
Precip chance8%
Sunrise06:35
Sunset19:37
Tuesday 8/9 Mostly cloudy
24°10°17%⌄
Wind8 mph N
Gusts19 mph
UV index4 – Moderate
Precip chance17%
Sunrise06:36
Sunset19:35
Wednesday 9/9 Sunny
29°11°3%⌄
Wind5 mph NW
Gusts16 mph
UV index7 – High
Precip chance3%
Sunrise06:37
Sunset19:33
Thursday 10/9 Mostly cloudy
23°13°11%⌄
Wind6 mph SW
Gusts14 mph
UV index5 – Moderate
Precip chance11%
Sunrise06:39
Sunset19:31
Friday 11/9 Mostly cloudy
21°11°12%⌄
Wind8 mph NW
Gusts10 mph
UV index6 – High
Precip chance12%
Sunrise06:40
Sunset19:29
Saturday 12/9 Sunny
18°9°0.2 mm⌄
Wind11 mph SW
Gusts16 mph
UV index5 – Moderate
Precip chance18%
Sunrise06:41
Sunset19:27
Sunday 13/9 Showers
20°11°0.3 mm⌄
Wind6 mph SW
Gusts15 mph
UV index4 – Moderate
Precip chance37%
Sunrise06:43
Sunset19:25
Monday 14/9 Showers
20°10°7.0 mm⌄
Wind9 mph SW
Gusts18 mph
UV index4 – Moderate
Precip chance87%
Sunrise06:44
Sunset19:23
Tuesday 15/9 Mostly cloudy
17°9°0.8 mm⌄
Wind4 mph S
Gusts13 mph
UV index4 – Moderate
Precip chance59%
Sunrise06:45
Sunset19:21
Wednesday 16/9 Mostly cloudy
20°9°14%⌄
Wind6 mph N
Gusts15 mph
UV index4 – Moderate
Precip chance14%
Sunrise06:47
Sunset19:19
Thursday 17/9 Sunny
25°8°6%⌄
Wind10 mph E
Gusts19 mph
UV index6 – High
Precip chance6%
Sunrise06:48
Sunset19:17
Saturday 19/9 Rain (climatological)
22°10°4.3 mm⌄
Day≈19–25°
Night≈7–13°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
23°11°20%⌄
Day≈20–26°
Night≈8–14°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
23°10°20%⌄
Day≈20–26°
Night≈7–13°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Rain (climatological)
23°11°2.1 mm⌄
Day≈20–26°
Night≈8–14°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
21°9°20%⌄
Day≈18–24°
Night≈6–12°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
19°8°20%⌄
Day≈16–22°
Night≈5–11°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Rain (climatological)
18°8°2.3 mm⌄
Day≈15–21°
Night≈5–11°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
22°10°20%⌄
Day≈19–25°
Night≈7–13°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
24°11°20%⌄
Day≈21–27°
Night≈8–14°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Rain (climatological)
25°12°3.0 mm⌄
Day≈22–28°
Night≈9–15°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
24°11°20%⌄
Day≈21–27°
Night≈8–14°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
21°9°20%⌄
Day≈18–24°
Night≈6–12°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Light rain (climatological)
12°1°1.6 mm⌄
Day≈9–15°
Night≈-2–4°
Precip≈1.3 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Partly cloudy (climatological)
10°0°20%⌄
Day≈7–13°
Night≈-3–3°
Precip≈1.3 in / October
(climatological)Typical range for these dates · 1991–2020
Saturday 3/10 Partly cloudy (climatological)
13°2°20%⌄
Day≈10–16°
Night≈-2–5°
Precip≈1.3 in / October
(climatological)Typical range for these dates · 1991–2020
Sunday 4/10 Rain (climatological)
15°3°3.6 mm⌄
Day≈12–18°
Night≈0–6°
Precip≈1.3 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.