Idaho Falls, ID Weather
Idaho Falls hourly forecast: next 24 hours
Today's high of 95°F (35°C) is about 5°F (3°C) above the typical July high of 90°F (32°C).
Current conditions in detail
Idaho Falls weather tomorrow (Saturday, July 18)
Tomorrow in Idaho Falls looks sunny, with a high of 98° and an overnight low of 60°. Rain is unlikely (1% chance). Winds top out near 10 mph, and the UV index reaches 11 (very high).
Idaho Falls 14-day forecast
About the weather in Idaho Falls
Idaho Falls has a semi-arid climate, marked by big day-to-night temperature swings and modest rainfall. Average daytime highs range from about 31°F (-1°C) in January to around 90°F (32°C) in July, and the city records roughly 84 days of measurable precipitation a year.
Idaho Falls weather: quick facts
- Hottest month: July - highs near 90°F (32°C)
- Coldest month: January - highs near 31°F (-1°C)
- Record high: 103°F (39°C) · Record low: -21°F (-29°C) (2015–2024)
- Wettest month: May (10 rainy days) · Sunniest: July (14.2 h sun/day)
- Climate type: semi-arid - big day-to-night temperature swings and modest rainfall
- Snow: about 30 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 90°F (32°C) and overnight lows stay near 60°F (16°C). The coolest month is January, with typical highs of 31°F (-1°C) and lows around 15°F (-9°C). Based on 2015–2024 weather data, temperatures have reached as high as 103°F (39°C) and dropped as low as -21°F (-29°C).
Rain, sun and snow
May is usually the wettest month. It brings about 1.9 inches (48 mm) of rain over 10 days, while July is the driest. July brings the most sunshine, averaging 14.2 hours of sun a day. Snow falls on about 30 days in a typical year, mostly from October through April.
Season by season
Spring (March through May)
Spring in Idaho Falls stays on the cool side of mild, with daytime highs averaging 57°F (14°C) and nights around 34°F (1°C); expect showers on roughly 28 days across the season, plus around 6 snowy days.
Summer (June through August)
Summer in Idaho Falls brings hot afternoons, with daytime highs averaging 85°F (30°C) and nights around 57°F (14°C); rain falls on about 9 days over the three months.
Fall (September through November)
Fall in Idaho Falls is crisp but comfortable, with daytime highs averaging 59°F (15°C) and nights around 37°F (3°C); expect showers on roughly 20 days across the season, plus around 5 snowy days.
Winter (December through February)
Winter in Idaho Falls is bitterly cold, with daytime highs averaging 33°F (1°C) and nights around 17°F (-8°C); expect showers on roughly 27 days across the season, plus around 19 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
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% |