Idaho Falls, ID 14-Day Forecast
Idaho, United States 🇺🇸
75°
Sunny right now
Today: high 75°, low 40°
Updated just now
Idaho Falls weather for the next 14 days
Wednesday, September 16
Sunny High 84° Low 48°Precipitation
2%
· 0.0 in
Max wind
11 mph
Humidity
30%
UV index
6 - Moderate
Sunrise / sunset
07:08 AM / 07:37 PM
Thursday, September 17
Sunny High 83° Low 53°Precipitation
57%
· 0.08 in
Max wind
20 mph
Humidity
47%
UV index
6 - High
Sunrise / sunset
07:09 AM / 07:35 PM
Friday, September 18
Patchy rain nearby High 77° Low 52°Precipitation
57%
· 0.07 in
Max wind
15 mph
Humidity
46%
UV index
5 - Moderate
Sunrise / sunset
07:11 AM / 07:33 PM
Saturday, September 19
Overcast High 70° Low 51°Precipitation
36%
· 0.02 in
Max wind
12 mph
Humidity
49%
UV index
6 - Moderate
Sunrise / sunset
07:12 AM / 07:31 PM
Sunday, September 20
Sunny High 75° Low 49°Precipitation
3%
· 0.0 in
Max wind
6 mph
Humidity
37%
UV index
6 - High
Sunrise / sunset
07:13 AM / 07:29 PM
Monday, September 21
Overcast High 77° Low 54°Precipitation
9%
· 0.0 in
Max wind
10 mph
Humidity
27%
UV index
5 - Moderate
Sunrise / sunset
07:14 AM / 07:28 PM
Tuesday, September 22
Sunny High 75° Low 49°Precipitation
3%
· 0.0 in
Max wind
21 mph
Humidity
29%
UV index
6 - High
Sunrise / sunset
07:15 AM / 07:26 PM
Wednesday, September 23
Sunny High 67° Low 41°Precipitation
1%
· 0.0 in
Max wind
11 mph
Humidity
35%
UV index
5 - Moderate
Sunrise / sunset
07:16 AM / 07:24 PM
Thursday, September 24
Sunny High 77° Low 46°Precipitation
0%
· 0.0 in
Max wind
8 mph
Humidity
19%
UV index
6 - High
Sunrise / sunset
07:17 AM / 07:22 PM
Friday, September 25
Sunny High 82° Low 50°Precipitation
2%
· 0.0 in
Max wind
18 mph
Humidity
21%
UV index
6 - High
Sunrise / sunset
07:18 AM / 07:20 PM
Saturday, September 26
Sunny High 69° Low 44°Precipitation
3%
· 0.0 in
Max wind
17 mph
Humidity
40%
UV index
6 - High
Sunrise / sunset
07:20 AM / 07:18 PM
Sunday, September 27
Sunny High 74° Low 48°Precipitation
3%
· 0.0 in
Max wind
9 mph
Humidity
29%
UV index
6 - High
Sunrise / sunset
07:21 AM / 07:17 PM
Monday, September 28
Sunny High 76° Low 49°Precipitation
1%
· 0.0 in
Max wind
9 mph
Humidity
27%
UV index
6 - High
Sunrise / sunset
07:22 AM / 07:15 PM
Idaho Falls 14-day outlook: the story
The warmest day of Idaho Falls's 14-day outlook is Wednesday, September 16 with a high near 84°F (29°C); the coolest night comes Tuesday, September 15, dipping to 40°F (5°C). The trend points cooler: week two runs about 3°F below week one. Highs over the next two weeks average 77°F (25°C), right in line with the typical September high of 76°F (24°C).
Precipitation is most likely on Thursday 17, Friday 18; the wettest day looks like Thursday, September 17 with about 0.08 in (1.9 mm) expected. For the weekend, expect Saturday 70°F (21°C) and overcast / Sunday 75°F (24°C) and sunny.
For typical conditions month by month, see the Idaho Falls climate & average temperatures guide.
Idaho Falls forecast questions
Will it rain in Idaho Falls this week?
The forecast currently shows meaningful precipitation chances on 2 of the next 14 days, peaking around Thursday, September 17.
What will be the warmest day in Idaho Falls over the next 14 days?
Wednesday, September 16, with a forecast high near 84°F (29°C).
How accurate is a 14-day forecast for Idaho Falls?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in Idaho Falls by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 31° | 15° | 9 | 1.2 in | 6.1 h/day | 77% |
| February | 36° | 19° | 9 | 1.2 in | 7.4 h/day | 70% |
| March | 47° | 26° | 9 | 1.5 in | 9.1 h/day | 62% |
| April | 57° | 33° | 9 | 1.3 in | 10.6 h/day | 51% |
| May | 67° | 42° | 10 | 1.9 in | 12.1 h/day | 49% |
| June | 80° | 52° | 5 | 0.8 in | 13.7 h/day | 39% |
| July | 90° | 60° | 1 | 0.2 in | 14.2 h/day | 29% |
| August | 86° | 58° | 3 | 0.5 in | 12.4 h/day | 34% |
| September | 76° | 49° | 5 | 1.2 in | 11.0 h/day | 42% |
| October | 59° | 37° | 7 | 1.4 in | 9.1 h/day | 56% |
| November | 43° | 25° | 8 | 1.2 in | 7.1 h/day | 67% |
| December | 32° | 17° | 9 | 1.4 in | 5.5 h/day | 74% |
14-day forecasts nearby