San Bernardino · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
San Bernardino & 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
35°
Tue, Sep 1
Coldest night
16°
Tue, Sep 1
Days with precip
2 / 14
of 14 forecast days
Nicest day
Fri, Sep 11
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
30° 17°
90% precip chance
Sat 12 – Sun 13 Sep
28° 18°
12% precip chance
Sat 19 – Sun 20 Sep
32° 16°
typical range
Sat 26 – Sun 27 Sep
31° 16°
typical range
30 days — San Bernardino
14 forecast + 16 climatology
Tue · Today Sunny
35°16°1%⌄
Wind16 mph W
Gusts28 mph
UV index10 – Very high
Precip chance1%
Sunrise06:22
Sunset19:15
Wed · Tomorrow Sunny
30°17°0%⌄
Wind13 mph W
Gusts19 mph
UV index9 – Very high
Precip chance0%
Sunrise06:23
Sunset19:14
Thursday 3/9 Sunny
30°17°1%⌄
Wind11 mph W
Gusts19 mph
UV index9 – Very high
Precip chance1%
Sunrise06:24
Sunset19:12
Friday 4/9 Sunny
29°17°1%⌄
Wind11 mph W
Gusts19 mph
UV index9 – Very high
Precip chance1%
Sunrise06:24
Sunset19:11
Saturday 5/9 Sunny
30°17°0.3 mm⌄
Wind13 mph S
Gusts24 mph
UV index7 – High
Precip chance18%
Sunrise06:25
Sunset19:10
Sunday 6/9 Showers
21°19°79.6 mm⌄
Wind4 mph SE
Gusts10 mph
UV index5 – Moderate
Precip chance90%
Sunrise06:26
Sunset19:08
Monday 7/9 Showers
28°21°3.3 mm⌄
Wind7 mph NW
Gusts9 mph
UV index6 – High
Precip chance71%
Sunrise06:26
Sunset19:07
Tuesday 8/9 Sunny
27°23°6%⌄
Wind12 mph NW
Gusts21 mph
UV index7 – High
Precip chance6%
Sunrise06:27
Sunset19:06
Wednesday 9/9 Sunny
31°23°1%⌄
Wind11 mph W
Gusts22 mph
UV index8 – Very high
Precip chance1%
Sunrise06:28
Sunset19:04
Thursday 10/9 Sunny
30°22°2%⌄
Wind9 mph W
Gusts16 mph
UV index7 – High
Precip chance2%
Sunrise06:29
Sunset19:03
Friday 11/9 Sunny
28°18°3%⌄
Wind7 mph SE
Gusts18 mph
UV index7 – High
Precip chance3%
Sunrise06:29
Sunset19:01
Saturday 12/9 Partly cloudy
26°18°12%⌄
Wind9 mph W
Gusts15 mph
UV index6 – High
Precip chance12%
Sunrise06:30
Sunset19:00
Sunday 13/9 Sunny
28°19°4%⌄
Wind9 mph W
Gusts16 mph
UV index7 – High
Precip chance4%
Sunrise06:31
Sunset18:59
Monday 14/9 Sunny
34°24°3%⌄
Wind9 mph W
Gusts21 mph
UV index8 – Very high
Precip chance3%
Sunrise06:31
Sunset18:57
Tuesday 15/9 Light rain (climatological)
34°18°1.1 mm⌄
Day≈31–37°
Night≈15–21°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
37°20°20%⌄
Day≈34–40°
Night≈17–23°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
37°20°20%⌄
Day≈34–40°
Night≈17–23°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Light rain (climatological)
36°20°0.6 mm⌄
Day≈33–39°
Night≈17–23°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
32°17°20%⌄
Day≈29–35°
Night≈14–20°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
31°16°20%⌄
Day≈28–34°
Night≈13–19°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Light rain (climatological)
33°18°0.8 mm⌄
Day≈30–36°
Night≈15–21°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
35°19°20%⌄
Day≈32–38°
Night≈16–22°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
37°20°20%⌄
Day≈34–40°
Night≈17–23°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Light rain (climatological)
35°19°0.8 mm⌄
Day≈32–38°
Night≈16–22°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
36°19°20%⌄
Day≈33–39°
Night≈16–22°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
31°17°20%⌄
Day≈28–34°
Night≈14–20°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Light rain (climatological)
30°16°0.9 mm⌄
Day≈27–33°
Night≈13–19°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
32°17°20%⌄
Day≈29–35°
Night≈14–20°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
34°19°20%⌄
Day≈31–37°
Night≈16–22°
Precip≈0.5 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Light rain (climatological)
36°20°1.4 mm⌄
Day≈33–39°
Night≈17–23°
Precip≈0.5 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 San Bernardino, 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.