Storm System to Bring Rain to Idaho Falls Monday

A shift in weather will bring precipitation and cooler temperatures to the city following a dry, mild weekend.

Updated on Oct. 24, 2026 in Current Conditions

Rain droplets on wet asphalt with a soft-focus mountain landscape in the distance. — A incoming storm system is forecast to bring rain and cooler temperatures to Idaho Falls on Monday, October 26, 2026. AI Illustration. Upload story photo >

Idaho Falls will see mild conditions through the weekend before a storm system arrives Monday night, October 26, 2026. This system brings a 70% chance of rain to the area.

Why it matters

The change in weather marks the conclusion of a period dominated by a stable high-pressure system that kept conditions dry and temperatures mild.

Forecasters anticipate rain Monday night with snow accumulation between one and three inches at elevations above 6,500 feet. Tuesday's daytime high will drop to near 48 degrees following a 30% chance of lingering morning rain.

The details

High pressure will maintain clear, mild conditions through Monday, with temperatures peaking near 59 degrees during the day. The incoming storm is expected to pass through the region quickly.

October 24, 2026: Sub-freezing temperatures reach approximately 30 degrees tonight.
October 25, 2026: Sunday brings mild daytime highs near 56 degrees with northern winds at five mph.
October 26, 2026: Monday daytime temperatures reach a high of 59 degrees.
October 26, 2026 night: A storm system arrives with a 70% chance of rain.
October 27, 2026: Tuesday features a 30% chance of rain before noon and a high near 48 degrees.

Seasonal Patterns

This forecast follows the established pattern of using specific elevation markers to differentiate between rain and snow events in mountainous terrain. The event aligns with standard meteorological expectations for late October transition cycles in Idaho.

Residents should prepare for travel changes on Monday night as the storm passes through. Those planning activities at elevations above 6,500 feet should remain aware of potential snow accumulation greater than three inches.

The takeaway

Prepare for a rapid temperature drop early next week as the system exits the region on Tuesday. Ensure outdoor gear is suitable for cooler conditions as daytime highs shift from the high 50s down to near 48 degrees.