Front-month gas futures rose 16 cents, or 5.4%, to $3.121 per million British thermal units (mmBtu) .
Data provider Refinitiv said gas output in the Lower 48 US states averaged 90.9 billion cubic feet per day (bcfd) so far in May, up from 90.6 bcfd in April, but still well below November 2019's monthly record of 95.4 bcfd.
Traders also noted that mild weather this week will likely cause utilities to boost injections into storage by so much that the total amount of gas in inventory will rise above the five-year (2016-2020) average for the first time since the February freeze.
Front-month gas futures rose 1.9 cents, or 0.8%, to $2.541 per million British thermal units.
Front-month gas futures fell 7 cents, or 2.7%, to $2.569 per million British thermal units.
After utilities started injecting gas into storage in late March, which was earlier than usual, speculators cut their net long positions on the New York Mercantile (NYMEX) and Intercontinental Exchanges for a sixth time in a row last week to their lowest since July 2020.