Penn Valley · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Penn Valley & 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
81°
Mon, Sep 7
Coldest night
47°
Wed, Sep 2
Days with precip
5 / 14
of 14 forecast days
Nicest day
Sat, Sep 5
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
72° 56°
6% precip chance
Sat 12 – Sun 13 Sep
78° 58°
1% precip chance
Sat 19 – Sun 20 Sep
62° 48°
typical range
Sat 26 – Sun 27 Sep
61° 48°
typical range
30 days — Penn Valley
14 forecast + 16 climatology
Mon · Today Sunny
78°61°1%⌄
Wind10 mph SW
Gusts17 mph
UV index7 – High
Precip chance1%
Sunrise06:32
Sunset19:37
Tue · Tomorrow Sunny
69°53°3%⌄
Wind11 mph SW
Gusts17 mph
UV index7 – High
Precip chance3%
Sunrise06:33
Sunset19:36
Wednesday 2/9 Sunny
65°47°5%⌄
Wind10 mph SW
Gusts16 mph
UV index8 – High
Precip chance5%
Sunrise06:34
Sunset19:34
Thursday 3/9 Mostly cloudy
69°51°0.5 mm⌄
Wind9 mph SW
Gusts17 mph
UV index8 – High
Precip chance36%
Sunrise06:35
Sunset19:32
Friday 4/9 Sunny
68°50°1.3 mm⌄
Wind9 mph SW
Gusts16 mph
UV index5 – Moderate
Precip chance57%
Sunrise06:36
Sunset19:31
Saturday 5/9 Sunny
72°56°1%⌄
Wind10 mph SW
Gusts17 mph
UV index6 – High
Precip chance1%
Sunrise06:37
Sunset19:29
Sunday 6/9 Mostly cloudy
72°62°6%⌄
Wind9 mph SW
Gusts14 mph
UV index5 – Moderate
Precip chance6%
Sunrise06:38
Sunset19:28
Monday 7/9 Sunny
81°66°4.5 mm⌄
Wind8 mph W
Gusts17 mph
UV index7 – High
Precip chance67%
Sunrise06:38
Sunset19:26
Tuesday 8/9 Showers
76°59°26.0 mm⌄
Wind7 mph NE
Gusts21 mph
UV index5 – Moderate
Precip chance87%
Sunrise06:39
Sunset19:25
Wednesday 9/9 Fog
64°56°1.4 mm⌄
Wind5 mph SW
Gusts11 mph
UV index4 – Moderate
Precip chance78%
Sunrise06:40
Sunset19:23
Thursday 10/9 Showers
67°55°1.2 mm⌄
Wind9 mph SW
Gusts17 mph
UV index5 – Moderate
Precip chance57%
Sunrise06:41
Sunset19:21
Friday 11/9 Sunny
66°54°4%⌄
Wind9 mph SW
Gusts15 mph
UV index5 – Moderate
Precip chance4%
Sunrise06:42
Sunset19:20
Saturday 12/9 Sunny
74°58°1%⌄
Wind8 mph W
Gusts19 mph
UV index6 – High
Precip chance1%
Sunrise06:43
Sunset19:18
Sunday 13/9 Sunny
78°63°1%⌄
Wind8 mph SW
Gusts15 mph
UV index7 – High
Precip chance1%
Sunrise06:44
Sunset19:17
Monday 14/9 Rain (climatological)
66°52°9.1 mm⌄
Day≈61–72°
Night≈46–57°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
66°51°20%⌄
Day≈60–71°
Night≈46–57°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
68°53°20%⌄
Day≈63–74°
Night≈47–58°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
65°51°10.1 mm⌄
Day≈60–71°
Night≈46–56°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
65°51°20%⌄
Day≈59–70°
Night≈45–56°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
62°49°20%⌄
Day≈56–67°
Night≈44–54°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
60°48°6.8 mm⌄
Day≈54–65°
Night≈42–53°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
66°52°20%⌄
Day≈61–72°
Night≈46–57°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
65°51°20%⌄
Day≈60–71°
Night≈46–56°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
68°53°8.1 mm⌄
Day≈63–74°
Night≈47–58°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
66°51°20%⌄
Day≈60–71°
Night≈46–57°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
65°51°20%⌄
Day≈60–71°
Night≈46–56°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
61°49°4.1 mm⌄
Day≈56–67°
Night≈43–54°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
60°48°20%⌄
Day≈55–66°
Night≈43–54°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
65°51°20%⌄
Day≈60–71°
Night≈46–56°
Precip≈3.0 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
68°53°4.8 mm⌄
Day≈62–73°
Night≈47–58°
Precip≈3.0 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 Penn Valley, 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.