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Sydney, New South Wales climate
Cfa Humid subtropical
Sydney has a mildly seasonal warm-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is January with an average daily high near 27°C, while the coldest is July averaging around 9°C at night. Around 1150 mm of precipitation falls each year, peaking in June (143 mm) and easing off in September (64 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsSydney climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 26 | 24 | 21 | 18 | 18 | 19 | 22 | 23 | 24 | 26 |
| Avg temp (°C) | 24 | 23 | 22 | 19 | 17 | 14 | 13 | 14 | 17 | 19 | 20 | 22 |
| Avg low (°C) | 20 | 20 | 18 | 15 | 12 | 10 | 9 | 10 | 12 | 15 | 17 | 18 |
| Precipitation (mm) | 91 | 132 | 118 | 114 | 101 | 143 | 80 | 75 | 64 | 68 | 91 | 73 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 26 | 24 | 21 | 18 |
| Avg temp (°C) | 24 | 23 | 22 | 19 | 17 | 14 |
| Avg low (°C) | 20 | 20 | 18 | 15 | 12 | 10 |
| Precipitation (mm) | 91 | 132 | 118 | 114 | 101 | 143 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 18 | 19 | 22 | 23 | 24 | 26 |
| Avg temp (°C) | 13 | 14 | 17 | 19 | 20 | 22 |
| Avg low (°C) | 9 | 10 | 12 | 15 | 17 | 18 |
| Precipitation (mm) | 80 | 75 | 64 | 68 | 91 | 73 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 13 | 15 | 11 | 11 | 12 | 10 | 8 | 9 | 11 | 12 | 11 |
| Days with high ≥ 32°C (days) | 3 | 2 | 0.7 | 0.3 | — | — | — | — | 0.5 | 2 | 2 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 13 | 15 | 11 | 11 | 12 |
| Days with high ≥ 32°C (days) | 3 | 2 | 0.7 | 0.3 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 8 | 9 | 11 | 12 | 11 |
| Days with high ≥ 32°C (days) | — | — | 0.5 | 2 | 2 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 61 | 59 | 53 | 53 | 56 | 49 | 44 | 47 | 56 | 63 | 61 |
| Clear days (≤ 30% cloud) | 6 | 6 | 6 | 8 | 8 | 7 | 10 | 12 | 10 | 7 | 5 | 6 |
| Partly cloudy days (30–70%) | 11 | 10 | 12 | 12 | 13 | 11 | 11 | 12 | 12 | 12 | 12 | 11 |
| Cloudy days (≥ 70%) | 14 | 13 | 13 | 10 | 10 | 12 | 9 | 7 | 8 | 12 | 14 | 14 |
| Relative humidity (%) | 75 | 76 | 75 | 73 | 72 | 75 | 73 | 70 | 69 | 70 | 73 | 73 |
| Wind speed (mph) | 7.2 | 7.2 | 7.1 | 6.8 | 7.1 | 7.5 | 7.4 | 7.5 | 7.1 | 7.0 | 7.2 | 7.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 61 | 59 | 53 | 53 | 56 |
| Clear days (≤ 30% cloud) | 6 | 6 | 6 | 8 | 8 | 7 |
| Partly cloudy days (30–70%) | 11 | 10 | 12 | 12 | 13 | 11 |
| Cloudy days (≥ 70%) | 14 | 13 | 13 | 10 | 10 | 12 |
| Relative humidity (%) | 75 | 76 | 75 | 73 | 72 | 75 |
| Wind speed (mph) | 7.2 | 7.2 | 7.1 | 6.8 | 7.1 | 7.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 49 | 44 | 47 | 56 | 63 | 61 |
| Clear days (≤ 30% cloud) | 10 | 12 | 10 | 7 | 5 | 6 |
| Partly cloudy days (30–70%) | 11 | 12 | 12 | 12 | 12 | 11 |
| Cloudy days (≥ 70%) | 9 | 7 | 8 | 12 | 14 | 14 |
| Relative humidity (%) | 73 | 70 | 69 | 70 | 73 | 73 |
| Wind speed (mph) | 7.4 | 7.5 | 7.1 | 7.0 | 7.2 | 7.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Sydney (observatory Hill), a weather station, inside the city. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.