Insulation Installers Parramatta

Parramatta experiences a unique climate characterised by both mild to cool, relatively short winters and warm to hot summers, along with moderate rainfall throughout the year.

During the summer months, Parramatta sees a wide range of maximum temperatures. It’s not uncommon for temperatures to exceed 35°C on 13 days in the summer season. However, they can also dip into the low 20s, especially after the passage of a cold front or the arrival of a sea breeze, such as the southerly buster. Occasionally, northwesterly winds can usher in desert-like conditions, pushing temperatures above 40°C. This phenomenon is most pronounced between November and February, with the highest recorded temperature reaching 47.3°C on January 7, 2018.

Compared to Sydney CBD, Parramatta tends to be warmer during the summer. This can be attributed to the urban heat island effect and its inland location. In extreme scenarios, the temperature delta can reach 5–10°C higher in Parramatta, particularly when sea breezes don’t penetrate the inland regions on hot summer and spring days. For example, on November 28, 2009, while Sydney recorded a temperature of 29.3°C, Parramatta experienced a significantly higher temperature of 39.0°C, almost 10°C higher.

Parramatta’s annual rainfall varies over the course of the year. During the first three months, the region experiences slightly higher rainfall. This is due to the position of the anticlockwise-rotating subtropical high-pressure system, which is situated to the south of the country. This allows moist easterly winds from the Tasman Sea to reach Parramatta. However, in the latter half of the year, typically in late winter and spring, the region tends to be drier. This change is primarily due to the subtropical high moving northward, allowing dry westerly winds from the interior to dominate.

Parramatta’s drier winters can also be attributed to its location on the leeward side of the Great Dividing Range. This geographical feature blocks westerly cold fronts, which are more common in late winter. As a result, warm, dry winds become prevalent, resulting in a significant number of sunny days and relatively low precipitation during that period.

Parramatta experiences common thunderstorms from early spring to early autumn, with occasional severe thunderstorms. However, snowfall in this region is exceedingly rare, with recorded instances only in 1836 and 1896. Parramatta enjoys approximately 106.6 days of clear skies each year.

The humidity in Parramatta’s summer weather can vary from humid to dry. Overall, the humidity typically falls within a comfortable range. Notably, the late summer and autumn period tend to have a higher average humidity compared to late winter and early spring.