Precipitation anomalies in American Samoa
American Samoa: Precipitation anomalies was 406.76 millimeters in 2025. ◆ Volatile
Latest (2025)
406.76 millimeters
Change on year
up 807.9%
World rank
8th
of 192 countries
All-time high
989.5 millimeters
in 1941
All-time low
-883.23 millimeters
in 1983
Years of data
86
1940–2025
Precipitation anomalies in American Samoa, 1940–2025
Source: Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data. Measured in millimeters.
Analysis
In 2025, precipitation anomalies in American Samoa stood at 406.76 millimeters.
The figure is up 807.9% on the previous year and up 406.5% over ten years.
Over the whole period, precipitation anomalies in American Samoa peaked at 989.5 millimeters in 1941 and was at its lowest, -883.23 millimeters, in 1983.
That places American Samoa 8th out of 192 countries with data for 2025, putting it in the top 10%.
The series is highly variable year to year, so single readings are best treated with caution.
Precipitation anomalies in American Samoa, year by year
| Year | millimeters | Change |
|---|---|---|
| 1940 | -4.16 millimeters | — |
| 1941 | 989.5 millimeters | -23879.7% |
| 1942 | -331.34 millimeters | -133.5% |
| 1943 | -716.34 millimeters | +116.2% |
| 1944 | -340.14 millimeters | -52.5% |
| 1945 | -393.84 millimeters | +15.8% |
| 1946 | -366.19 millimeters | -7.0% |
| 1947 | 28.83 millimeters | -107.9% |
| 1948 | -160.17 millimeters | -655.5% |
| 1949 | -708.18 millimeters | +342.1% |
| 1950 | -863.51 millimeters | +21.9% |
| 1951 | -420.96 millimeters | -51.2% |
| 1952 | 578.95 millimeters | -237.5% |
| 1953 | -117.67 millimeters | -120.3% |
| 1954 | -478.38 millimeters | +306.6% |
| 1955 | -364.74 millimeters | -23.8% |
| 1956 | -543.02 millimeters | +48.9% |
| 1957 | 432.85 millimeters | -179.7% |
| 1958 | 327.71 millimeters | -24.3% |
| 1959 | 254.92 millimeters | -22.2% |
| 1960 | 278.38 millimeters | +9.2% |
| 1961 | -264.13 millimeters | -194.9% |
| 1962 | 111.62 millimeters | -142.3% |
| 1963 | -372.55 millimeters | -433.8% |
| 1964 | 120.59 millimeters | -132.4% |
| 1965 | -307.95 millimeters | -355.4% |
| 1966 | -277.61 millimeters | -9.9% |
| 1967 | -33.9 millimeters | -87.8% |
| 1968 | -564.92 millimeters | +1566.5% |
| 1969 | -817.72 millimeters | +44.7% |
| 1970 | -280.37 millimeters | -65.7% |
| 1971 | -513.71 millimeters | +83.2% |
| 1972 | -309.33 millimeters | -39.8% |
| 1973 | 614.05 millimeters | -298.5% |
| 1974 | -702.75 millimeters | -214.4% |
| 1975 | -612.08 millimeters | -12.9% |
| 1976 | -474.26 millimeters | -22.5% |
| 1977 | -409.35 millimeters | -13.7% |
| 1978 | 593.99 millimeters | -245.1% |
| 1979 | -592.13 millimeters | -199.7% |
| 1980 | -526.56 millimeters | -11.1% |
| 1981 | -30.21 millimeters | -94.3% |
| 1982 | -686.76 millimeters | +2173.0% |
| 1983 | -883.23 millimeters | +28.6% |
| 1984 | -75.03 millimeters | -91.5% |
| 1985 | -615.76 millimeters | +720.7% |
| 1986 | -69.25 millimeters | -88.8% |
| 1987 | -649.33 millimeters | +837.7% |
| 1988 | 180.29 millimeters | -127.8% |
| 1989 | -441.36 millimeters | -344.8% |
| 1990 | -329.2 millimeters | -25.4% |
| 1991 | -229.25 millimeters | -30.4% |
| 1992 | -388.95 millimeters | +69.7% |
| 1993 | -376.76 millimeters | -3.1% |
| 1994 | 34.35 millimeters | -109.1% |
| 1995 | 102.5 millimeters | +198.4% |
| 1996 | 83.97 millimeters | -18.1% |
| 1997 | -382.12 millimeters | -555.1% |
| 1998 | -821.47 millimeters | +115.0% |
| 1999 | -99.79 millimeters | -87.9% |
| 2000 | -383.71 millimeters | +284.5% |
| 2001 | 184.84 millimeters | -148.2% |
| 2002 | -191.53 millimeters | -203.6% |
| 2003 | 231.68 millimeters | -221.0% |
| 2004 | -304.18 millimeters | -231.3% |
| 2005 | 3.92 millimeters | -101.3% |
| 2006 | 775.18 millimeters | +19683.2% |
| 2007 | 740.41 millimeters | -4.5% |
| 2008 | -61.01 millimeters | -108.2% |
| 2009 | -345.45 millimeters | +466.2% |
| 2010 | 141.02 millimeters | -140.8% |
| 2011 | -217.16 millimeters | -254.0% |
| 2012 | 87.35 millimeters | -140.2% |
| 2013 | 131.96 millimeters | +51.1% |
| 2014 | 49.54 millimeters | -62.5% |
| 2015 | -132.72 millimeters | -367.9% |
| 2016 | 98.07 millimeters | -173.9% |
| 2017 | 361.22 millimeters | +268.3% |
| 2018 | 311.19 millimeters | -13.8% |
| 2019 | -135.42 millimeters | -143.5% |
| 2020 | 732.33 millimeters | -640.8% |
| 2021 | -536.99 millimeters | -173.3% |
| 2022 | -457.74 millimeters | -14.8% |
| 2023 | -195.19 millimeters | -57.4% |
| 2024 | 44.8 millimeters | -123.0% |
| 2025 | 406.76 millimeters | +807.9% |
American Samoa compared with similar countries
- American Samoa's 406.76 millimeters is above the median for high income countries, which is -18.65 millimeters. (65 countries reporting)
- American Samoa's 406.76 millimeters is above the median for East Asia & Pacific, which is 153 millimeters, 2.7× the median. (27 countries reporting)
Biggest year-on-year movements
Years where Precipitation anomalies in American Samoa changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 1941 | +23879.7% | -4.16 millimeters | 989.5 millimeters |
| 2006 | +19683.2% | 3.92 millimeters | 775.18 millimeters |
| 1982 | -2173.0% | -30.21 millimeters | -686.76 millimeters |
| 1968 | -1566.5% | -33.9 millimeters | -564.92 millimeters |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1940s | -200.2 millimeters | -716.34 millimeters | 989.5 millimeters | 10 |
| 1950s | -119.39 millimeters | -863.51 millimeters | 578.95 millimeters | 10 |
| 1960s | -212.82 millimeters | -817.72 millimeters | 278.38 millimeters | 10 |
| 1970s | -268.59 millimeters | -702.75 millimeters | 614.05 millimeters | 10 |
| 1980s | -379.72 millimeters | -883.23 millimeters | 180.29 millimeters | 10 |
| 1990s | -240.67 millimeters | -821.47 millimeters | 102.5 millimeters | 10 |
| 2000s | 65.02 millimeters | -383.71 millimeters | 775.18 millimeters | 10 |
| 2010s | 69.51 millimeters | -217.16 millimeters | 361.22 millimeters | 10 |
| 2020s | -1.01 millimeters | -536.99 millimeters | 732.33 millimeters | 6 |
Countries ranked near American Samoa
More climate change data for American Samoa
- Spring temperature anomalies 0.1942 °C (2026)
- Summer temperature anomalies -0.1017 °C (2026)
- Temperature anomalies by month 0.0944 °C (2026)
- Share of global CO₂ emissions and population 0.0% (2100)
- Population, total, annual growth rate -1.57 % change on previous year (2025)
- Population, total, per unit of GDP 0.0001 units per US$ of GDP (2022)
- Urban population, annual growth rate -2.1 % change on previous year (2025)
- Urban population, per unit of GDP 0 units per US$ of GDP (2022)
- Urban population, per capita 0.8051 units per person (2025)
- Precipitation anomalies, annual growth rate 807.87 % change on previous year (2025)
Frequently asked questions
- What is precipitation anomalies in American Samoa?
- Precipitation anomalies in American Samoa was 406.76 millimeters in 2025, according to Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data.
- What is the highest precipitation anomalies recorded in American Samoa?
- The highest recorded value was 989.5 millimeters in 1941.
- What is the lowest precipitation anomalies recorded in American Samoa?
- The lowest recorded value was -883.23 millimeters in 1983.
- How does American Samoa rank for precipitation anomalies?
- American Samoa ranks 8th out of 192 countries with data for 2025.
- Is precipitation anomalies rising or falling in American Samoa?
- Over the last ten years it is up 406.5%. The long-run trend across the full record is volatile.
- Where does this American Samoa data come from?
- The figures come from Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data, published as part of Precipitation anomalies. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 86 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Difference in a specific year's total precipitation—rain and snow—from the 1991–2020 average, measured in millimeters, excluding fog and dew.