Marietta-Alderwood · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Marietta-Alderwood & 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
71°
Tue, Sep 1
Coldest night
50°
Sat, Sep 5
Days with precip
2 / 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
67° 50°
8% precip chance
Sat 12 – Sun 13 Sep
68° 53°
11% precip chance
Sat 19 – Sun 20 Sep
64° 51°
typical range
Sat 26 – Sun 27 Sep
64° 50°
typical range
30 days — Marietta-Alderwood
14 forecast + 16 climatology
Tue · Today Sunny
71°53°17%⌄
Wind12 mph S
Gusts18 mph
UV index5 – Moderate
Precip chance17%
Sunrise06:27
Sunset19:53
Wed · Tomorrow Showers
67°55°0.6 mm⌄
Wind13 mph SE
Gusts27 mph
UV index4 – Moderate
Precip chance49%
Sunrise06:28
Sunset19:51
Thursday 3/9 Showers
60°54°1.7 mm⌄
Wind7 mph SE
Gusts15 mph
UV index3 – Moderate
Precip chance70%
Sunrise06:30
Sunset19:49
Friday 4/9 Mostly cloudy
61°52°15%⌄
Wind11 mph W
Gusts21 mph
UV index4 – Moderate
Precip chance15%
Sunrise06:31
Sunset19:47
Saturday 5/9 Sunny
65°50°8%⌄
Wind9 mph W
Gusts18 mph
UV index4 – Moderate
Precip chance8%
Sunrise06:33
Sunset19:44
Sunday 6/9 Sunny
67°53°5%⌄
Wind7 mph W
Gusts14 mph
UV index5 – Moderate
Precip chance5%
Sunrise06:34
Sunset19:42
Monday 7/9 Sunny
66°56°6%⌄
Wind16 mph SE
Gusts24 mph
UV index5 – Moderate
Precip chance6%
Sunrise06:35
Sunset19:40
Tuesday 8/9 Sunny
61°52°17%⌄
Wind16 mph S
Gusts29 mph
UV index5 – Moderate
Precip chance17%
Sunrise06:37
Sunset19:38
Wednesday 9/9 Showers
64°54°2.7 mm⌄
Wind9 mph S
Gusts14 mph
UV index4 – Moderate
Precip chance74%
Sunrise06:38
Sunset19:36
Thursday 10/9 Mostly cloudy
62°53°15%⌄
Wind6 mph SE
Gusts8 mph
UV index5 – Moderate
Precip chance15%
Sunrise06:40
Sunset19:34
Friday 11/9 Sunny
62°52°12%⌄
Wind6 mph S
Gusts16 mph
UV index5 – Moderate
Precip chance12%
Sunrise06:41
Sunset19:32
Saturday 12/9 Sunny
64°53°11%⌄
Wind7 mph W
Gusts18 mph
UV index5 – Moderate
Precip chance11%
Sunrise06:42
Sunset19:30
Sunday 13/9 Sunny
68°55°7%⌄
Wind7 mph W
Gusts16 mph
UV index5 – Moderate
Precip chance7%
Sunrise06:44
Sunset19:28
Monday 14/9 Mostly cloudy
69°59°12%⌄
Wind7 mph SE
Gusts14 mph
UV index6 – High
Precip chance12%
Sunrise06:45
Sunset19:26
Tuesday 15/9 Light rain (climatological)
65°53°0.8 mm⌄
Day≈59–70°
Night≈48–59°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
70°57°20%⌄
Day≈65–76°
Night≈51–62°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
71°58°20%⌄
Day≈66–77°
Night≈52–63°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Light rain (climatological)
69°56°0.9 mm⌄
Day≈64–75°
Night≈51–62°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
64°53°20%⌄
Day≈59–69°
Night≈48–59°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
61°51°20%⌄
Day≈56–66°
Night≈46–57°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Light rain (climatological)
63°53°1.8 mm⌄
Day≈58–68°
Night≈47–58°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
65°54°20%⌄
Day≈60–71°
Night≈49–59°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
70°56°20%⌄
Day≈64–75°
Night≈51–62°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Light rain (climatological)
70°56°1.3 mm⌄
Day≈64–75°
Night≈51–62°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
65°54°20%⌄
Day≈60–71°
Night≈48–59°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
64°53°20%⌄
Day≈58–69°
Night≈47–58°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Light rain (climatological)
59°50°1.5 mm⌄
Day≈53–64°
Night≈45–55°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
59°50°20%⌄
Day≈53–64°
Night≈45–55°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
63°53°20%⌄
Day≈58–69°
Night≈47–58°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Light rain (climatological)
69°56°1.1 mm⌄
Day≈64–74°
Night≈51–62°
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 Marietta-Alderwood, 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.