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Neiafu, Tonga climate
Af Tropical rainforest
Neiafu has a remarkably steady tropical climate (Tropical rainforest, Köppen Af). The hottest month is February with an average daily high near 30°C, while the coldest is July averaging around 19°C at night. Around 2281 mm of precipitation falls each year, peaking in January (287 mm) and easing off in August (109 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)Neiafu climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 30 | 30 | 29 | 28 | 27 | 26 | 26 | 27 | 27 | 28 | 29 |
| Avg temp (°C) | 26 | 26 | 26 | 25 | 24 | 23 | 23 | 23 | 23 | 24 | 25 | 26 |
| Avg low (°C) | 23 | 23 | 23 | 22 | 21 | 20 | 19 | 19 | 20 | 21 | 22 | 23 |
| Precipitation (mm) | 287 | 272 | 254 | 211 | 175 | 140 | 122 | 109 | 166 | 162 | 169 | 214 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 30 | 30 | 29 | 28 | 27 |
| Avg temp (°C) | 26 | 26 | 26 | 25 | 24 | 23 |
| Avg low (°C) | 23 | 23 | 23 | 22 | 21 | 20 |
| Precipitation (mm) | 287 | 272 | 254 | 211 | 175 | 140 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 26 | 27 | 27 | 28 | 29 |
| Avg temp (°C) | 23 | 23 | 23 | 24 | 25 | 26 |
| Avg low (°C) | 19 | 19 | 20 | 21 | 22 | 23 |
| Precipitation (mm) | 122 | 109 | 166 | 162 | 169 | 214 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 70 | 67 | 68 | 65 | 66 | 64 | 66 | 67 | 69 | 70 | 71 |
| Relative humidity (%) | 82 | 81 | 82 | 80 | 79 | 79 | 79 | 79 | 80 | 81 | 81 | 81 |
| Wind speed (km/h) | 18.9 | 18.4 | 17.3 | 19.8 | 20.3 | 21.3 | 21.1 | 21.2 | 21.5 | 20.9 | 19.3 | 20.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 70 | 67 | 68 | 65 | 66 |
| Relative humidity (%) | 82 | 81 | 82 | 80 | 79 | 79 |
| Wind speed (km/h) | 18.9 | 18.4 | 17.3 | 19.8 | 20.3 | 21.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 66 | 67 | 69 | 70 | 71 |
| Relative humidity (%) | 79 | 79 | 80 | 81 | 81 | 81 |
| Wind speed (km/h) | 21.1 | 21.2 | 21.5 | 20.9 | 19.3 | 20.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Lupepau'u, a weather station, about 8 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.