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Blenheim, New Zealand climate
Cfb Oceanic / temperate
Blenheim has a mildly seasonal mild-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is February with an average daily high near 73°F, while the coldest is July averaging around 38°F at night. Precipitation is fairly even year-round, totalling about 33 inches.
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)Blenheim climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 72 | 73 | 70 | 65 | 60 | 56 | 54 | 56 | 59 | 63 | 66 | 69 |
| Avg temp (°F) | 65 | 65 | 62 | 57 | 52 | 47 | 46 | 48 | 51 | 55 | 58 | 62 |
| Avg low (°F) | 57 | 57 | 53 | 48 | 44 | 39 | 38 | 40 | 43 | 47 | 50 | 54 |
| Precipitation (in) | 2.5 | 2.1 | 2.4 | 2.7 | 3.2 | 3.3 | 2.8 | 2.7 | 2.9 | 3.2 | 2.3 | 3.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 72 | 73 | 70 | 65 | 60 | 56 |
| Avg temp (°F) | 65 | 65 | 62 | 57 | 52 | 47 |
| Avg low (°F) | 57 | 57 | 53 | 48 | 44 | 39 |
| Precipitation (in) | 2.5 | 2.1 | 2.4 | 2.7 | 3.2 | 3.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 54 | 56 | 59 | 63 | 66 | 69 |
| Avg temp (°F) | 46 | 48 | 51 | 55 | 58 | 62 |
| Avg low (°F) | 38 | 40 | 43 | 47 | 50 | 54 |
| Precipitation (in) | 2.8 | 2.7 | 2.9 | 3.2 | 2.3 | 3.3 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 61 | 61 | 59 | 55 | 57 | 58 | 59 | 62 | 64 | 67 | 69 |
| Relative humidity (%) | 71 | 70 | 75 | 82 | 87 | 90 | 90 | 89 | 85 | 82 | 78 | 75 |
| Wind speed (mph) | 3.0 | 2.8 | 2.8 | 2.7 | 2.8 | 2.8 | 2.7 | 2.7 | 3.0 | 3.2 | 3.3 | 3.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 61 | 61 | 59 | 55 | 57 |
| Relative humidity (%) | 71 | 70 | 75 | 82 | 87 | 90 |
| Wind speed (mph) | 3.0 | 2.8 | 2.8 | 2.7 | 2.8 | 2.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 59 | 62 | 64 | 67 | 69 |
| Relative humidity (%) | 90 | 89 | 85 | 82 | 78 | 75 |
| Wind speed (mph) | 2.7 | 2.7 | 3.0 | 3.2 | 3.3 | 3.0 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Nelson Aerodrome Aws, a weather station, about 67 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.