Weather on December 21 in Sydney

Historical weather data for December 21 in Sydney, Australia

Avg High26°C (79°F)
Avg Low19°C (66°F)
Warmest199431°C
Coldest202217°C

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

About This Date

December 21st in Sydney, Australia typically brings pleasant winter weather, with average highs around 26°C and lows near 19°C. Over 55 years of records, the warmest December 21st was in 1994 (31°C average), while the coldest was 2022 (17°C) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 27% of December 21st dates historically, with the wettest December 21st recording 2.84" of rain. The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.

The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.

Planning for December 21st in Sydney? Great weather for outdoor activities.

Year by Year History

YearHighLowPrecip
202531°C (87°F)23°C (73°F)--
202423°C (74°F)18°C (65°F)--
202322°C (71°F)17°C (63°F)--
202219°C (67°F)15°C (59°F)--
202126°C (79°F)22°C (72°F)--
202023°C (73°F)19°C (66°F)--
201929°C (84°F)21°C (70°F)0"
201824°C (75°F)21°C (69°F)2.84"
201724°C (76°F)21°C (70°F)0.3"
201627°C (80°F)18°C (65°F)0"
201529°C (84°F)23°C (74°F)0"
201426°C (78°F)17°C (62°F)0"
201328°C (82°F)22°C (71°F)0"
201224°C (76°F)19°C (67°F)0"
201125°C (77°F)19°C (66°F)0"
201028°C (82°F)16°C (60°F)0"
200925°C (77°F)20°C (68°F)0"
200822°C (72°F)14°C (58°F)0.04"
200728°C (82°F)21°C (70°F)0.04"
200624°C (76°F)19°C (66°F)0.36"
200532°C (89°F)17°C (63°F)0"
200424°C (75°F)18°C (65°F)0"
200326°C (79°F)19°C (67°F)0.06"
200227°C (81°F)21°C (70°F)0"
200127°C (81°F)23°C (73°F)0"
200029°C (85°F)21°C (70°F)0"
199922°C (72°F)13°C (56°F)0.12"
199824°C (75°F)19°C (67°F)0.38"
199733°C (91°F)20°C (68°F)0"
199623°C (74°F)16°C (60°F)0"
199522°C (71°F)16°C (60°F)0.06"
199441°C (106°F)22°C (71°F)0"
199322°C (72°F)19°C (67°F)0"
199225°C (77°F)20°C (68°F)0"
199123°C (74°F)20°C (68°F)0"
199026°C (78°F)19°C (67°F)0.02"
198920°C (68°F)18°C (64°F)0.02"
198823°C (73°F)21°C (69°F)0"
198719°C (66°F)17°C (62°F)2.82"
198624°C (76°F)17°C (62°F)0"
198537°C (98°F)20°C (68°F)0"
198424°C (75°F)16°C (61°F)0"
198335°C (95°F)19°C (66°F)0"
198223°C (73°F)17°C (62°F)0.02"
198123°C (74°F)18°C (65°F)0"
198033°C (91°F)19°C (66°F)0"
197931°C (87°F)19°C (66°F)0"
197823°C (74°F)17°C (62°F)0"
197725°C (77°F)19°C (67°F)0"
197629°C (85°F)17°C (63°F)0"
197523°C (74°F)16°C (60°F)0.1"
197422°C (71°F)16°C (60°F)0"
197328°C (82°F)21°C (69°F)0"
197236°C (97°F)21°C (70°F)0"
197124°C (76°F)19°C (67°F)0.03"

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