Idaho Falls · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Idaho Falls & 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
87°
Sun, Sep 6
Coldest night
43°
Thu, Sep 10
Days with precip
3 / 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
87° 50°
1% precip chance
Sat 12 – Sun 13 Sep
73° 46°
4% precip chance
Sat 19 – Sun 20 Sep
76° 47°
typical range
Sat 26 – Sun 27 Sep
74° 49°
typical range
30 days — Idaho Falls
14 forecast + 16 climatology
Tue · Today Mostly cloudy
81°58°6.8 mm⌄
Wind23 mph S
Gusts38 mph
UV index7 – High
Precip chance66%
Sunrise06:52
Sunset20:04
Wed · Tomorrow Mostly cloudy
73°55°7%⌄
Wind24 mph SW
Gusts37 mph
UV index7 – High
Precip chance7%
Sunrise06:53
Sunset20:02
Thursday 3/9 Sunny
80°50°2%⌄
Wind19 mph SW
Gusts26 mph
UV index7 – High
Precip chance2%
Sunrise06:54
Sunset20:00
Friday 4/9 Sunny
72°49°2%⌄
Wind19 mph SW
Gusts32 mph
UV index7 – High
Precip chance2%
Sunrise06:55
Sunset19:58
Saturday 5/9 Sunny
85°50°1%⌄
Wind21 mph S
Gusts26 mph
UV index7 – High
Precip chance1%
Sunrise06:56
Sunset19:57
Sunday 6/9 Sunny
87°53°1%⌄
Wind19 mph S
Gusts26 mph
UV index8 – Very high
Precip chance1%
Sunrise06:57
Sunset19:55
Monday 7/9 Showers
78°55°9.2 mm⌄
Wind10 mph W
Gusts13 mph
UV index6 – High
Precip chance75%
Sunrise06:58
Sunset19:53
Tuesday 8/9 Sunny
71°50°2.4 mm⌄
Wind23 mph SW
Gusts34 mph
UV index6 – High
Precip chance57%
Sunrise06:59
Sunset19:51
Wednesday 9/9 Mostly cloudy
70°50°8%⌄
Wind22 mph W
Gusts36 mph
UV index5 – Moderate
Precip chance8%
Sunrise07:01
Sunset19:49
Thursday 10/9 Sunny
64°43°0.2 mm⌄
Wind15 mph SW
Gusts28 mph
UV index5 – Moderate
Precip chance17%
Sunrise07:02
Sunset19:48
Friday 11/9 Sunny
73°47°1%⌄
Wind14 mph S
Gusts31 mph
UV index6 – High
Precip chance1%
Sunrise07:03
Sunset19:46
Saturday 12/9 Sunny
69°46°4%⌄
Wind12 mph N
Gusts17 mph
UV index6 – High
Precip chance4%
Sunrise07:04
Sunset19:44
Sunday 13/9 Sunny
73°47°1%⌄
Wind6 mph NE
Gusts15 mph
UV index6 – High
Precip chance1%
Sunrise07:05
Sunset19:42
Monday 14/9 Sunny
81°51°1%⌄
Wind8 mph W
Gusts17 mph
UV index7 – High
Precip chance1%
Sunrise07:06
Sunset19:40
Tuesday 15/9 Rain (climatological)
75°50°3.7 mm⌄
Day≈70–81°
Night≈45–56°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
78°52°20%⌄
Day≈73–84°
Night≈47–57°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
80°53°20%⌄
Day≈74–85°
Night≈47–58°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
79°53°2.3 mm⌄
Day≈74–85°
Night≈47–58°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
76°51°20%⌄
Day≈71–81°
Night≈45–56°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
71°47°20%⌄
Day≈65–76°
Night≈42–53°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Light rain (climatological)
72°48°2.0 mm⌄
Day≈66–77°
Night≈43–53°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
78°52°20%⌄
Day≈73–83°
Night≈46–57°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
81°54°20%⌄
Day≈76–87°
Night≈48–59°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
79°53°4.1 mm⌄
Day≈74–85°
Night≈47–58°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
76°51°20%⌄
Day≈71–82°
Night≈45–56°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
74°49°20%⌄
Day≈69–80°
Night≈44–55°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Rain (climatological)
73°49°4.9 mm⌄
Day≈68–78°
Night≈43–54°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
73°49°20%⌄
Day≈67–78°
Night≈43–54°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
74°49°20%⌄
Day≈68–79°
Night≈44–55°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Rain (climatological)
80°53°4.4 mm⌄
Day≈75–85°
Night≈47–58°
Precip≈1.6 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 Idaho Falls, 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.