Just in the first 18 days of February, Wellington has received more than 90 millimetres of rain.

But council's chief executive officer Michael McMahon said the dos and don't of the level four water restrictions were still in effect.

"It's important for the community to remember that although the recent rainfall has been wonderful, we are still facing a water shortage at Burrendong Dam," he said.

"It's extremely important for residents and business owners to continue following level four water restrictions."

In Sydney, restrictions will go back to level one in March after the influx of rain.

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It will allow residents to water their gardens and lawns any day, as long as the hose is fitting with a trigger nozzle and it's before 10am or after 4pm.

But the restrictions are unlikely to change anytime soon.

"The rain is extremely welcome however the water supply in Burrendong is still under two per cent which is a major consideration for all parties," Mr McMahon said.

"Council is currently focused on level four restrictions with no plans to increase the restrictions in the near future."

Under level four restrictions, residents are only allowed to water lawns and gardens on Sundays and Wednesdays either before 9am or after 6pm for a maximum of 30 minutes.

For businesses, it's 30 minutes outside the heat of the day on Mondays and Thursdays.

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Following the rain, council is expecting a drop in water usage.

"From the amount of water that is received at the sewer treatment plant across the region we can tell that the majority of the water being used is external - watering gardens, lawns, filling pools etc. Therefore, when it rains we see a dramatic drop in the water use," Mr McMahon said.

The CEO has encouraged people to make use of council's rebate program which is offering money back on rainwater tanks and other water-saving devices.

"You can receive up to $250 back if you purchase a 2000 litre tank locally," Mr McMahon said.

Rebates are also available on dual flush toilets, swimming pool covers, water saving shower heads and outdoor irrigation timers.

More information is available on council's website.