More thunderstorms expected in the territory this week before a drenching of up 100 millimetres of rain.

Lunchtime barbecues and beach plans on Christmas Day are looking good to go ahead, with sunshine and warm temperatures expected to hold out until the late afternoon. 

Sydneysiders are again being hammered by thunderstorms as the latest storm cells bring rain and strong wind gusts to the city.

After a year of driving global temperatures to unprecedented warmth, the giant El Nino weather event in the Pacific is officially over, raising hopes that drought-hit regions may be in for some relief in Australia and elsewhere.

Storms hit the Sydney region, bringing hail and damaging winds.