A break in the weather is helping firefighters as they work to protect cabins near Mayo, Yukon, from the largest forest fire in the territory so far this season.

It's thought that lightning started the 330 hectare blaze Monday afternoon. The fire is burning on the east side of Ethel Lake, about 20 kilometres south of Mayo.

George Maratos, a spokesperson for Yukon Wildland Fire Management, says a bit of rain and diminishing winds helped firefighters.

On Tuesday they set up sprinkler systems to protect cabins within a few kilometers of the fire.

"Other than the identified values it is not posing a major risk to anything else right now," he said.

"It is still 20 kilometres from the community of Mayo, and at 330 hectares not a lot of growth reported yesterday afternoon."

The current fire danger rating in the Mayo area is high, elsewhere around the territory the danger rating is in the moderate to low range.