Sunnyvale · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Sunnyvale & 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
93°
Thu, Aug 27
Coldest night
53°
Tue, Sep 1
Days with precip
0 / 14
of 14 forecast days
Nicest day
Fri, Aug 21
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
92° 57°
8% precip chance
Sat 29 – Sun 30 Aug
90° 55°
2% precip chance
Sat 5 – Sun 6 Sep
87° 60°
typical range
Sat 12 – Sun 13 Sep
85° 60°
typical range
30 days — Sunnyvale
14 forecast + 16 climatology
Fri · Today Sunny
76°58°17%⌄
Wind9 mph N
Gusts19 mph
UV index9 – Very high
Precip chance17%
Sunrise06:29
Sunset19:53
Sat · Tomorrow Sunny
89°57°6%⌄
Wind10 mph NW
Gusts21 mph
UV index9 – Very high
Precip chance6%
Sunrise06:30
Sunset19:51
Sunday 23/8 Mostly cloudy
92°59°8%⌄
Wind6 mph NW
Gusts18 mph
UV index9 – Very high
Precip chance8%
Sunrise06:31
Sunset19:50
Monday 24/8 Mostly cloudy
92°61°6%⌄
Wind6 mph N
Gusts17 mph
UV index8 – Very high
Precip chance6%
Sunrise06:32
Sunset19:48
Tuesday 25/8 Sunny
89°57°3%⌄
Wind8 mph N
Gusts19 mph
UV index9 – Very high
Precip chance3%
Sunrise06:32
Sunset19:47
Wednesday 26/8 Sunny
89°56°2%⌄
Wind9 mph NW
Gusts16 mph
UV index8 – Very high
Precip chance2%
Sunrise06:33
Sunset19:46
Thursday 27/8 Sunny
93°60°1%⌄
Wind9 mph NW
Gusts20 mph
UV index8 – Very high
Precip chance1%
Sunrise06:34
Sunset19:44
Friday 28/8 Mostly cloudy
91°56°4%⌄
Wind6 mph NW
Gusts17 mph
UV index8 – Very high
Precip chance4%
Sunrise06:35
Sunset19:43
Saturday 29/8 Sunny
90°57°2%⌄
Wind8 mph NW
Gusts16 mph
UV index8 – Very high
Precip chance2%
Sunrise06:36
Sunset19:41
Sunday 30/8 Sunny
83°55°2%⌄
Wind10 mph NW
Gusts14 mph
UV index7 – High
Precip chance2%
Sunrise06:37
Sunset19:40
Monday 31/8 Sunny
81°53°4%⌄
Wind10 mph NW
Gusts19 mph
UV index7 – High
Precip chance4%
Sunrise06:37
Sunset19:39
Tuesday 1/9 Sunny
89°53°3%⌄
Wind7 mph NW
Gusts18 mph
UV index8 – Very high
Precip chance3%
Sunrise06:38
Sunset19:37
Wednesday 2/9 Sunny
85°54°3%⌄
Wind8 mph NW
Gusts19 mph
UV index7 – High
Precip chance3%
Sunrise06:39
Sunset19:36
Thursday 3/9 Sunny
86°56°2%⌄
Wind9 mph NW
Gusts21 mph
UV index7 – High
Precip chance2%
Sunrise06:40
Sunset19:34
Friday 4/9 Light rain (climatological)
83°58°0.6 mm⌄
Day≈78–88°
Night≈53–64°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
87°61°20%⌄
Day≈82–92°
Night≈55–66°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
86°60°20%⌄
Day≈81–91°
Night≈55–66°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Light rain (climatological)
84°59°0.7 mm⌄
Day≈79–90°
Night≈54–65°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
81°57°20%⌄
Day≈75–86°
Night≈52–63°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
82°58°20%⌄
Day≈76–87°
Night≈52–63°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
78°56°0.4 mm⌄
Day≈73–84°
Night≈50–61°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
86°60°20%⌄
Day≈81–91°
Night≈55–66°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
85°60°20%⌄
Day≈80–90°
Night≈54–65°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
85°60°0.4 mm⌄
Day≈80–90°
Night≈54–65°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
83°58°20%⌄
Day≈77–88°
Night≈53–64°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
82°58°20%⌄
Day≈77–88°
Night≈53–64°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Light rain (climatological)
77°55°0.6 mm⌄
Day≈71–82°
Night≈49–60°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
82°58°20%⌄
Day≈76–87°
Night≈52–63°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
81°57°20%⌄
Day≈75–86°
Night≈52–63°
Precip≈0.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
85°60°0.5 mm⌄
Day≈79–90°
Night≈54–65°
Precip≈0.2 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 Sunnyvale, 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.