Dee Why, Australia

Full City Profile

2.4 /5.0

C Fair

21,145 Population 9/sq mi density

59 ft Elevation 18 meters

67°F Avg Temperature 19°C

Overall

2.4 / 5.0

Fair overall score based on economy, affordability, safety and education

Economy

3.1 / 5.0

$35,997 median income, 3.7% unemployment

Affordability

1.8 / 5.0

$309,800 home value, $1,549/mo rent

Dee Why enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 72°F in January while summers reach 61°F in July. The area gets 340 sunny days per year. Annual precipitation totals 32.8 inches. The area receives 0.0 inches of snow annually.

Temperature

72°F Jan (22°C) 61°F Jul (16°C)

Annual Average	66.6°F
	23% above US avg
January Average	72°F (22°C)
July Average	61°F (16°C)
Sunny Days	340 days/yr

Geography

Elevation	59 ft (18 m)
Area	2,265.5 sq mi (5,867.6 km²)
Population Density	9/sq mi
Coordinates	-33.7511°N, 151.2889°W
Timezone	Australia/Sydney

Precipitation & Snow

Annual Rainfall 32.8"

14% below US avg

Snowfall 0.0"

Wettest Month (Mar) 6.10"

Driest Month (Jul) 2.68"

Air Quality

Earthquake History

12 earthquakes (M2.5+) within 150 km since 1990. Strongest: M5.3. Most recent: M3.6 on May 28, 2025.

Aug 6, 1994	9 km WSW of Ellalong, Australia	M5.3	89 km
Apr 22, 2025	18 km SW of Singleton, Australia	M5.1	119 km
Feb 14, 2002	1 km NNW of Yerrinbool, Australia	M3.9	97 km
Mar 17, 1999	2 km SE of Picton, Australia	M3.8	77 km
May 28, 2025	3 km WNW of Cobbitty, Australia	M3.6	65 km
Mar 8, 2024	14 km SSW of Woodford, Australia	M3.5	79 km
Aug 18, 2007	10 km NW of Mittagong, Australia	M3.2	109 km
Sep 10, 2012	33 km ESE of Blue Bay, Australia	M3.2	61 km
Apr 11, 2007	3 km SE of Stanwell Park, Australia	M3.1	61 km
Jun 18, 2006	8 km W of Oakdale, Australia	M3.0	87 km
Feb 23, 1990	49 km S of Denman, Australia	M3.0	116 km
Aug 18, 2007	11 km NW of Mittagong, Australia	M2.6	109 km

Source: USGS (M2.5+, 1990–2025)

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	72°F (22°C)	5.9 in	Warmest
February	72°F (22°C)	5.6 in
March	69°F (21°C)	6.1 in	Wettest
April	65°F (18°C)	5.2 in
May	60°F (16°C)	4.5 in
June	55°F (13°C)	4.9 in
July	61°F (16°C)	2.7 in	Driest
August	55°F (13°C)	3.3 in	Coldest
September	59°F (15°C)	2.9 in
October	63°F (17°C)	3.4 in
November	66°F (19°C)	4.0 in
December	70°F (21°C)	3.5 in

Dee Why has a seasonal temperature swing of 17°F / from 55°F in August to 72°F in January. Total annual precipitation is 52.0 inches, with March being the wettest month (6.1") and July the driest (2.7").

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