 Rainfall is fairly evenly spread through the year, with moderate to low variability, though it is slightly higher during the first half of the year when easterly winds dominate (February–June) and lower in the second half (mainly July–September).Due to the unpredictability of rain, the wettest and driest months would change on a yearly basis.Within the city and surrounds, rainfall varies, from around at Badgerys Creek (in the west) to at Turramurra (the northeast).