Walnut Creek · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Walnut Creek & 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
92°
Sat, Aug 29
Coldest night
58°
Sat, Aug 22
Days with precip
0 / 14
of 14 forecast days
Nicest day
Wed, Sep 2
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
90° 58°
9% precip chance
Sat 29 – Sun 30 Aug
92° 64°
2% precip chance
Sat 5 – Sun 6 Sep
86° 55°
typical range
Sat 12 – Sun 13 Sep
87° 55°
typical range
30 days — Walnut Creek
14 forecast + 16 climatology
Sat · Today Sunny
90°58°5%⌄
Wind9 mph W
Gusts15 mph
UV index9 – Very high
Precip chance5%
Sunrise06:29
Sunset19:52
Sun · Tomorrow Mostly cloudy
90°63°9%⌄
Wind11 mph W
Gusts14 mph
UV index9 – Very high
Precip chance9%
Sunrise06:30
Sunset19:51
Monday 24/8 Mostly cloudy
87°62°5%⌄
Wind11 mph W
Gusts15 mph
UV index8 – Very high
Precip chance5%
Sunrise06:31
Sunset19:49
Tuesday 25/8 Sunny
86°59°2%⌄
Wind11 mph W
Gusts15 mph
UV index9 – Very high
Precip chance2%
Sunrise06:32
Sunset19:48
Wednesday 26/8 Sunny
90°59°2%⌄
Wind10 mph W
Gusts15 mph
UV index8 – Very high
Precip chance2%
Sunrise06:33
Sunset19:46
Thursday 27/8 Sunny
90°63°1%⌄
Wind10 mph W
Gusts14 mph
UV index8 – Very high
Precip chance1%
Sunrise06:34
Sunset19:45
Friday 28/8 Mostly cloudy
89°64°8%⌄
Wind9 mph W
Gusts13 mph
UV index7 – High
Precip chance8%
Sunrise06:34
Sunset19:44
Saturday 29/8 Sunny
92°65°2%⌄
Wind9 mph W
Gusts13 mph
UV index8 – Very high
Precip chance2%
Sunrise06:35
Sunset19:42
Sunday 30/8 Sunny
91°64°1%⌄
Wind9 mph SW
Gusts15 mph
UV index8 – Very high
Precip chance1%
Sunrise06:36
Sunset19:41
Monday 31/8 Sunny
91°63°1%⌄
Wind10 mph SW
Gusts15 mph
UV index8 – Very high
Precip chance1%
Sunrise06:37
Sunset19:39
Tuesday 1/9 Sunny
84°58°2%⌄
Wind11 mph SW
Gusts17 mph
UV index7 – High
Precip chance2%
Sunrise06:38
Sunset19:38
Wednesday 2/9 Sunny
82°58°3%⌄
Wind10 mph W
Gusts17 mph
UV index7 – High
Precip chance3%
Sunrise06:39
Sunset19:36
Thursday 3/9 Sunny
83°60°3%⌄
Wind11 mph W
Gusts15 mph
UV index7 – High
Precip chance3%
Sunrise06:40
Sunset19:35
Friday 4/9 Sunny
85°60°3%⌄
Wind10 mph SW
Gusts14 mph
UV index7 – High
Precip chance3%
Sunrise06:40
Sunset19:33
Saturday 5/9 Light rain (climatological)
81°55°1.7 mm⌄
Day≈76–87°
Night≈50–61°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
86°58°20%⌄
Day≈80–91°
Night≈53–64°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
85°58°20%⌄
Day≈80–91°
Night≈52–63°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Light rain (climatological)
84°57°2.0 mm⌄
Day≈79–89°
Night≈52–62°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
81°55°20%⌄
Day≈76–86°
Night≈50–61°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
78°53°20%⌄
Day≈73–83°
Night≈48–59°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Light rain (climatological)
78°53°1.8 mm⌄
Day≈73–83°
Night≈48–59°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
80°55°20%⌄
Day≈75–85°
Night≈49–60°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
87°59°20%⌄
Day≈81–92°
Night≈53–64°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Light rain (climatological)
88°60°1.5 mm⌄
Day≈83–94°
Night≈54–65°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
84°57°20%⌄
Day≈78–89°
Night≈51–62°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
79°54°20%⌄
Day≈73–84°
Night≈49–59°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Light rain (climatological)
76°52°0.8 mm⌄
Day≈71–82°
Night≈47–58°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
77°53°20%⌄
Day≈72–83°
Night≈48–58°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
83°56°20%⌄
Day≈78–89°
Night≈51–62°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Light rain (climatological)
86°58°1.3 mm⌄
Day≈80–91°
Night≈53–64°
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 Walnut Creek, 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.