The high on Thursday was 69, according to the National Weather Service.
The record high is 75, and that was set in 1992. Forecasters expected the high to reach 74, but cloudy skies and northwest winds kept temperatures from soaring, said Les Colin, lead forecaster for the National Weather Service in Boise.
The high Wednesday was 71 the first 70 degree day since November.
Get ready for a cool-down over the weekend and early next week. Friday will be about 64 (about 10 degrees warmer than the average high temperature for mid-March).
Temperatures will continue to fall through the weekend, with estimated highs of 63 and 53 for Saturday and Sunday, according to National Weather Service reports. Northwest winds of 10 to 20 mph could make it feel even colder on Sunday. By Monday morning, temperatures will be in the upper-20s and 30s.
"It's going to feel quite a bit colder than it has been," Colin said.
Days until spring: Five.