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Greymouth, New Zealand climate
Cfb Oceanic / temperate
Greymouth has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is January with an average daily high near 22°C, while the coldest is July averaging around 1°C at night. Precipitation is fairly even year-round, totalling about 552 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Greymouth climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 22 | 20 | 17 | 15 | 12 | 11 | 12 | 15 | 17 | 19 | 21 |
| Avg temp (°C) | 17 | 17 | 15 | 12 | 9 | 6 | 6 | 7 | 9 | 11 | 13 | 16 |
| Avg low (°C) | 11 | 11 | 9 | 6 | 4 | 1 | 1 | 2 | 3 | 5 | 7 | 10 |
| Precipitation (mm) | 37 | 34 | 40 | 51 | 53 | 66 | 54 | 51 | 36 | 47 | 39 | 44 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 22 | 20 | 17 | 15 | 12 |
| Avg temp (°C) | 17 | 17 | 15 | 12 | 9 | 6 |
| Avg low (°C) | 11 | 11 | 9 | 6 | 4 | 1 |
| Precipitation (mm) | 37 | 34 | 40 | 51 | 53 | 66 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 11 | 12 | 15 | 17 | 19 | 21 |
| Avg temp (°C) | 6 | 7 | 9 | 11 | 13 | 16 |
| Avg low (°C) | 1 | 2 | 3 | 5 | 7 | 10 |
| Precipitation (mm) | 54 | 51 | 36 | 47 | 39 | 44 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 69 | 65 | 66 | 67 | 64 | 68 | 66 | 68 | 69 | 70 | 71 | 72 |
| Relative humidity (%) | 66 | 68 | 72 | 79 | 84 | 88 | 88 | 86 | 82 | 78 | 73 | 69 |
| Wind speed (m/s) | 3.2 | 3.0 | 2.8 | 2.5 | 2.4 | 2.4 | 2.3 | 2.5 | 2.8 | 3.0 | 3.1 | 3.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 69 | 65 | 66 | 67 | 64 | 68 |
| Relative humidity (%) | 66 | 68 | 72 | 79 | 84 | 88 |
| Wind speed (m/s) | 3.2 | 3.0 | 2.8 | 2.5 | 2.4 | 2.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 68 | 69 | 70 | 71 | 72 |
| Relative humidity (%) | 88 | 86 | 82 | 78 | 73 | 69 |
| Wind speed (m/s) | 2.3 | 2.5 | 2.8 | 3.0 | 3.1 | 3.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 26 years of daily observations at Christchurch Aero Aws, a weather station, about 156 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.