Friday Harbor · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Friday Harbor & 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
69°
Thu, Sep 10
Coldest night
51°
Sun, Aug 30
Days with precip
2 / 14
of 14 forecast days
Nicest day
Thu, Sep 10
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
66° 53°
9% precip chance
Sat 12 – Sun 13 Sep
66° 44°
typical range
Sat 19 – Sun 20 Sep
52° 44°
typical range
Sat 26 – Sun 27 Sep
56° 44°
typical range
30 days — Friday Harbor
14 forecast + 16 climatology
Sun · Today Mostly cloudy
65°51°19%⌄
Wind15 mph W
Gusts24 mph
UV index5 – Moderate
Precip chance19%
Sunrise06:26
Sunset19:58
Mon · Tomorrow Mostly cloudy
65°53°22%⌄
Wind7 mph W
Gusts15 mph
UV index5 – Moderate
Precip chance22%
Sunrise06:28
Sunset19:56
Tuesday 1/9 Partly cloudy
64°54°17%⌄
Wind16 mph S
Gusts22 mph
UV index5 – Moderate
Precip chance17%
Sunrise06:29
Sunset19:54
Wednesday 2/9 Mostly cloudy
62°55°4.2 mm⌄
Wind32 mph SE
Gusts50 mph
UV index4 – Moderate
Precip chance83%
Sunrise06:30
Sunset19:52
Thursday 3/9 Showers
57°52°1.0 mm⌄
Wind13 mph SE
Gusts20 mph
UV index4 – Moderate
Precip chance64%
Sunrise06:32
Sunset19:50
Friday 4/9 Sunny
60°53°14%⌄
Wind14 mph S
Gusts18 mph
UV index5 – Moderate
Precip chance14%
Sunrise06:33
Sunset19:48
Saturday 5/9 Sunny
62°54°9%⌄
Wind9 mph SW
Gusts15 mph
UV index5 – Moderate
Precip chance9%
Sunrise06:35
Sunset19:46
Sunday 6/9 Sunny
66°53°8%⌄
Wind8 mph SW
Gusts11 mph
UV index5 – Moderate
Precip chance8%
Sunrise06:36
Sunset19:44
Monday 7/9 Sunny
65°56°11%⌄
Wind18 mph SW
Gusts30 mph
UV index5 – Moderate
Precip chance11%
Sunrise06:37
Sunset19:42
Tuesday 8/9 Sunny
61°55°13%⌄
Wind21 mph SW
Gusts32 mph
UV index5 – Moderate
Precip chance13%
Sunrise06:39
Sunset19:40
Wednesday 9/9 Sunny
65°55°9%⌄
Wind7 mph NW
Gusts10 mph
UV index5 – Moderate
Precip chance9%
Sunrise06:40
Sunset19:38
Thursday 10/9 Sunny
69°58°6%⌄
Wind8 mph N
Gusts14 mph
UV index6 – High
Precip chance6%
Sunrise06:42
Sunset19:36
Friday 11/9 Sunny
67°59°9%⌄
Wind6 mph N
Gusts9 mph
UV index5 – Moderate
Precip chance9%
Sunrise06:43
Sunset19:33
Saturday 12/9 Mostly cloudy
66°58°19%⌄
Wind14 mph SW
Gusts23 mph
UV index5 – Moderate
Precip chance19%
Sunrise06:44
Sunset19:31
Sunday 13/9 Light rain (climatological)
52°44°1.0 mm⌄
Day≈46–57°
Night≈39–49°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
55°46°20%⌄
Day≈50–60°
Night≈41–52°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
57°47°20%⌄
Day≈51–62°
Night≈42–53°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Light rain (climatological)
56°47°1.1 mm⌄
Day≈50–61°
Night≈41–52°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
49°43°20%⌄
Day≈44–55°
Night≈37–48°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
51°44°20%⌄
Day≈45–56°
Night≈38–49°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Light rain (climatological)
52°44°1.0 mm⌄
Day≈47–57°
Night≈39–50°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
51°44°20%⌄
Day≈46–56°
Night≈38–49°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
55°46°20%⌄
Day≈49–60°
Night≈41–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Light rain (climatological)
59°49°1.4 mm⌄
Day≈53–64°
Night≈43–54°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
53°45°20%⌄
Day≈48–59°
Night≈40–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
51°44°20%⌄
Day≈46–57°
Night≈38–49°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Light rain (climatological)
49°43°1.1 mm⌄
Day≈44–55°
Night≈37–48°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
51°44°20%⌄
Day≈45–56°
Night≈38–49°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
56°47°20%⌄
Day≈50–61°
Night≈41–52°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Light rain (climatological)
60°49°1.2 mm⌄
Day≈54–65°
Night≈44–54°
Precip≈0.6 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 Friday Harbor, 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.