Shia rebels have welcomed an offer by Yemen's government to suspend its military offensive in the north if the rebels agree to do the same, BBC reported.
A statement on the website of Yemen's ruling party said this was to allow aid agencies to help tens of thousands of people known to have fled their homes.
Locals in the Saada region say there has been no gunfire since the ceasefire took effect, AP reports.
The Shia rebellion against the Sunni government began in 2004.
Earlier this week Yemeni authorities rejected an offer of a truce from one rebel group, the Houthis, which it accuses of trying to spread a form of Shia fundamentalism.
In response the rebels originally promised to continue fighting, but the latest deal has apparently been greeted with respect.
One rebel spokesman was quoted by the Associated Press as saying that his group would like a permanent ceasefire but would abide by the arrangement for the sake of civilians and those fleeing their homes.
More than 25,000 displaced people have been registered by the International Committee for the Red Cross and the Yemen Red Crescent Society since a new government offensive - Operation Scorched Earth - began in August.
"The dire humanitarian situation is hitting women and children especially hard," said Daniel Gagnon of the Red Cross speaking from Yemen.
UN humanitarian officials have launched a $23.5m (£14.3m) appeal to help the displaced people of northern Yemen.
The latest clashes follow five years of intermittent fighting between the government and the rebels.
They say a corrupt Yemeni government, backed by the West and Saudi Arabia, is using security concerns as a pretext for persecuting their community and trying to suppress their version of Shia Islam, known as Zaydism.