Weather on December 18 in Sydney

Historical weather data for December 18 in Sydney, Australia

Avg High26°C (79°F)
Avg Low18°C (65°F)
Warmest199030°C
Coldest202216°C

Based on 55 years of data from SYDNEY (OBSERVATORY HILL)

About This Date

December 18th in Sydney, Australia typically brings pleasant winter weather, with average highs around 26°C and lows near 18°C. Over 55 years of records, the warmest December 18th was in 1990 (30°C average), while the coldest was 2022 (16°C) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 25% of December 18th dates historically, with the wettest December 18th recording 2.3" of rain. Temperatures on this date have remained relatively stable over the past several decades.

Temperatures on this date have remained relatively stable over the past several decades.

Planning for December 18th in Sydney? Great weather for outdoor activities.

Year by Year History

YearHighLowPrecip
202524°C (76°F)20°C (68°F)--
202422°C (71°F)18°C (64°F)--
202325°C (77°F)21°C (70°F)--
202218°C (65°F)14°C (57°F)--
202128°C (82°F)20°C (68°F)--
202031°C (88°F)22°C (71°F)--
201926°C (79°F)17°C (63°F)0"
201828°C (82°F)22°C (71°F)0"
201728°C (82°F)21°C (70°F)0.02"
201621°C (70°F)18°C (65°F)0"
201528°C (82°F)19°C (66°F)0"
201426°C (78°F)18°C (65°F)0"
201326°C (79°F)21°C (69°F)0"
201227°C (80°F)17°C (63°F)0.02"
201123°C (74°F)16°C (60°F)0"
201026°C (78°F)19°C (67°F)0"
200922°C (71°F)20°C (68°F)0.54"
200827°C (81°F)19°C (67°F)0"
200723°C (74°F)17°C (63°F)0.06"
200624°C (76°F)15°C (59°F)0"
200526°C (79°F)18°C (64°F)0"
200424°C (76°F)19°C (66°F)0"
200327°C (80°F)20°C (68°F)0"
200223°C (74°F)21°C (69°F)0"
200126°C (78°F)21°C (69°F)0"
200028°C (82°F)20°C (68°F)0"
199922°C (71°F)18°C (64°F)0.36"
199823°C (74°F)21°C (70°F)0"
199727°C (81°F)20°C (68°F)0"
199622°C (71°F)17°C (62°F)0.78"
199534°C (94°F)18°C (64°F)0.64"
199428°C (83°F)21°C (69°F)0"
199324°C (75°F)19°C (66°F)0"
199223°C (74°F)18°C (65°F)0.2"
199126°C (78°F)16°C (61°F)0"
199040°C (104°F)21°C (69°F)0"
198925°C (77°F)15°C (59°F)0"
198826°C (78°F)21°C (69°F)0"
198729°C (85°F)21°C (69°F)0"
198625°C (77°F)17°C (62°F)0"
198529°C (84°F)18°C (64°F)0"
198433°C (92°F)21°C (69°F)0"
198323°C (73°F)18°C (64°F)0.02"
198226°C (78°F)21°C (69°F)0"
198126°C (78°F)18°C (65°F)0"
198021°C (70°F)15°C (59°F)0"
197924°C (75°F)17°C (63°F)0"
197823°C (73°F)15°C (59°F)2.3"
197734°C (94°F)22°C (71°F)0"
197627°C (80°F)13°C (56°F)0.46"
197527°C (81°F)18°C (65°F)0.1"
197426°C (79°F)19°C (66°F)0"
197323°C (74°F)18°C (65°F)0.15"
197225°C (77°F)20°C (68°F)0"
197123°C (74°F)16°C (60°F)0.05"

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