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Ta`ū, American Samoa climate
Af Tropical rainforest
Ta`ū has a remarkably steady tropical climate (Tropical rainforest, Köppen Af). The hottest month is March with an average daily high near 31°C, while the coldest is August averaging around 25°C at night. Around 3281 mm of precipitation falls each year, peaking in January (397 mm) and easing off in June (164 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)Ta`ū climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 31 | 31 | 30 | 30 | 29 | 29 | 30 | 30 | 31 | 31 |
| Avg temp (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 26 |
| Precipitation (mm) | 397 | 347 | 275 | 289 | 302 | 164 | 186 | 176 | 197 | 261 | 314 | 374 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 31 | 31 | 30 | 30 |
| Avg temp (°C) | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 26 | 26 | 26 | 26 | 26 | 25 |
| Precipitation (mm) | 397 | 347 | 275 | 289 | 302 | 164 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 29 | 30 | 30 | 31 | 31 |
| Avg temp (°C) | 27 | 27 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 25 | 25 | 25 | 25 | 26 | 26 |
| Precipitation (mm) | 186 | 176 | 197 | 261 | 314 | 374 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 24 | 22 | 24 | 22 | 21 | 19 | 20 | 19 | 18 | 21 | 21 | 24 |
| Days with high ≥ 32°C (days) | 7 | 8 | 9 | 5 | 2 | 0.2 | 0.3 | 0.2 | 0.7 | 2 | 3 | 5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 24 | 22 | 24 | 22 | 21 | 19 |
| Days with high ≥ 32°C (days) | 7 | 8 | 9 | 5 | 2 | 0.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 20 | 19 | 18 | 21 | 21 | 24 |
| Days with high ≥ 32°C (days) | 0.3 | 0.2 | 0.7 | 2 | 3 | 5 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 74 | 70 | 63 | 61 | 59 | 57 | 55 | 56 | 63 | 69 | 73 |
| Relative humidity (%) | 81 | 81 | 81 | 80 | 80 | 79 | 80 | 79 | 80 | 81 | 81 | 81 |
| Wind speed (km/h) | 15.8 | 16.0 | 14.5 | 15.3 | 17.6 | 20.9 | 20.8 | 20.5 | 20.8 | 19.0 | 16.7 | 16.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 74 | 70 | 63 | 61 | 59 |
| Relative humidity (%) | 81 | 81 | 81 | 80 | 80 | 79 |
| Wind speed (km/h) | 15.8 | 16.0 | 14.5 | 15.3 | 17.6 | 20.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 55 | 56 | 63 | 69 | 73 |
| Relative humidity (%) | 80 | 79 | 80 | 81 | 81 | 81 |
| Wind speed (km/h) | 20.8 | 20.5 | 20.8 | 19.0 | 16.7 | 16.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Pago Pago Wso AP, a weather station, about 130 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.