Before you get too glum about the March employment report, consider this: One of the main reasons behind the hiring slowdown was likely something that had little to do with the economy's underlying strength.

Beneath the disappointment of the economy adding only 126,000 jobs last month — 53,000 below even the most pessimistic projection in the Bloomberg survey of 98 economists — was an unusually cold weather in many unfortunate parts of the country.

The chill on the jobs figures was most evident in the Labor Department's calculation of those unable to work due to inclement weather. Here, we see that March 2015 was a little out of the ordinary: While the historical average for March is about 141,000 workers that can't work due to poor weather, last month there were about 182,000 who were held back.

Diving deeper into the data, two industries were primarily responsible for the big hit to staffing last month. Together, job growth in construction and leisure and hospitality slowed by about 90,000 jobs from the prior month (30,000 less in construction and 57,000 in the leisure and hospitality).

These two industries also happen to be two of the most weather-sensitive. The cold and snow keep builders from breaking ground and many Americans from venturing out for a night on the town.

Within leisure and hospitality, restaurants slowed their hiring almost to a standstill. The 8,700 increase in staffs at food and drinking establishments was the smallest tally since June 2012, displayed in the chart below.

Why the hiring slowdown happened matters because those reasons help us forecast future employment growth. Weather is a transitory factor, meaning we can be hopeful that hiring will pick up once it gets a little warmer.