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Newcastle, New South Wales climate
Cfa Humid subtropical
Newcastle has a mildly seasonal warm-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is January with an average daily high near 78°F, while the coldest is July averaging around 49°F at night. Around 41 inches of precipitation falls each year, peaking in June (5.2 inches) and easing off in August (2.0 inches).
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 countsNewcastle climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 78 | 78 | 77 | 74 | 69 | 65 | 64 | 66 | 70 | 72 | 74 | 76 |
| Avg temp (°F) | 73 | 73 | 71 | 67 | 62 | 58 | 56 | 58 | 62 | 66 | 68 | 71 |
| Avg low (°F) | 68 | 68 | 66 | 61 | 55 | 51 | 49 | 50 | 55 | 59 | 62 | 66 |
| Precipitation (in) | 2.8 | 4.3 | 4.5 | 4.3 | 4.6 | 5.2 | 2.7 | 2.0 | 2.3 | 2.5 | 3.1 | 2.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 78 | 78 | 77 | 74 | 69 | 65 |
| Avg temp (°F) | 73 | 73 | 71 | 67 | 62 | 58 |
| Avg low (°F) | 68 | 68 | 66 | 61 | 55 | 51 |
| Precipitation (in) | 2.8 | 4.3 | 4.5 | 4.3 | 4.6 | 5.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 64 | 66 | 70 | 72 | 74 | 76 |
| Avg temp (°F) | 56 | 58 | 62 | 66 | 68 | 71 |
| Avg low (°F) | 49 | 50 | 55 | 59 | 62 | 66 |
| Precipitation (in) | 2.7 | 2.0 | 2.3 | 2.5 | 3.1 | 2.6 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 11 | 12 | 11 | 12 | 13 | 10 | 8 | 9 | 10 | 11 | 11 |
| Days with high ≥ 90°F (days) | 2 | 1 | 0.8 | 0.2 | — | — | — | — | 0.3 | 1 | 2 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 11 | 12 | 11 | 12 | 13 |
| Days with high ≥ 90°F (days) | 2 | 1 | 0.8 | 0.2 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 8 | 9 | 10 | 11 | 11 |
| Days with high ≥ 90°F (days) | — | — | 0.3 | 1 | 2 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 61 | 57 | 52 | 49 | 52 | 46 | 41 | 44 | 55 | 62 | 61 |
| Clear days (≤ 30% cloud) | 6 | 5 | 7 | 8 | 10 | 9 | 11 | 13 | 12 | 8 | 5 | 6 |
| Partly cloudy days (30–70%) | 10 | 10 | 12 | 13 | 10 | 11 | 11 | 11 | 11 | 12 | 11 | 11 |
| Cloudy days (≥ 70%) | 14 | 13 | 12 | 9 | 10 | 10 | 8 | 7 | 7 | 12 | 13 | 15 |
| Relative humidity (%) | 73 | 75 | 75 | 73 | 73 | 76 | 73 | 69 | 69 | 69 | 72 | 72 |
| Wind speed (mph) | 6.6 | 6.6 | 6.5 | 6.2 | 6.6 | 7.2 | 7.1 | 7.0 | 6.6 | 6.5 | 6.5 | 6.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 61 | 57 | 52 | 49 | 52 |
| Clear days (≤ 30% cloud) | 6 | 5 | 7 | 8 | 10 | 9 |
| Partly cloudy days (30–70%) | 10 | 10 | 12 | 13 | 10 | 11 |
| Cloudy days (≥ 70%) | 14 | 13 | 12 | 9 | 10 | 10 |
| Relative humidity (%) | 73 | 75 | 75 | 73 | 73 | 76 |
| Wind speed (mph) | 6.6 | 6.6 | 6.5 | 6.2 | 6.6 | 7.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 46 | 41 | 44 | 55 | 62 | 61 |
| Clear days (≤ 30% cloud) | 11 | 13 | 12 | 8 | 5 | 6 |
| Partly cloudy days (30–70%) | 11 | 11 | 11 | 12 | 11 | 11 |
| Cloudy days (≥ 70%) | 8 | 7 | 7 | 12 | 13 | 15 |
| Relative humidity (%) | 73 | 69 | 69 | 69 | 72 | 72 |
| Wind speed (mph) | 7.1 | 7.0 | 6.6 | 6.5 | 6.5 | 6.5 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Newcastle Nobbys Signal Statio, a weather station, about 2 km from the city centre. 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.