Historical exposure to drought — Land soil moisture anomaly in Boise City-Nampa, ID
Boise City-Nampa, ID: Historical exposure to drought — Land soil moisture anomaly was 0.6987 Percentage change in 2025. ◆ Volatile
Historical exposure to drought — Land soil moisture anomaly in Boise City-Nampa, ID, 1950–2025
Source: Organisation for Economic Co-operation and Development. Measured in Percentage change.
Analysis
The most recent figure for historical exposure to drought — land soil moisture anomaly in Boise City-Nampa, ID is 0.6987 Percentage change, measured in 2025.
The figure is up 145.9% on the previous year and up 107.0% over ten years.
Over the whole period, historical exposure to drought — land soil moisture anomaly in Boise City-Nampa, ID peaked at 21.86 Percentage change in 1984 and was at its lowest, -13.73 Percentage change, in 1977.
That places Boise City-Nampa, ID 746th out of 3112 regions with data for 2025, putting it in the top quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Historical exposure to drought — Land soil moisture anomaly in Boise City-Nampa, ID, year by year
| Year | Percentage change | Change |
|---|---|---|
| 1950 | 3.44 Percentage change | — |
| 1951 | 11.79 Percentage change | +242.2% |
| 1952 | -4.03 Percentage change | -134.2% |
| 1953 | 4.91 Percentage change | -221.7% |
| 1954 | -11.04 Percentage change | -325.0% |
| 1955 | 4.3 Percentage change | -138.9% |
| 1956 | 11.33 Percentage change | +163.5% |
| 1957 | 3.55 Percentage change | -68.7% |
| 1958 | -0.275 Percentage change | -107.7% |
| 1959 | 5.85 Percentage change | -2228.5% |
| 1960 | -3.88 Percentage change | -166.3% |
| 1961 | 1.52 Percentage change | -139.2% |
| 1962 | 5.89 Percentage change | +287.3% |
| 1963 | 3.76 Percentage change | -36.1% |
| 1964 | 15.67 Percentage change | +316.6% |
| 1965 | 1.75 Percentage change | -88.8% |
| 1966 | -7.7 Percentage change | -540.3% |
| 1967 | 10.53 Percentage change | -236.7% |
| 1968 | -8.91 Percentage change | -184.6% |
| 1969 | -1.88 Percentage change | -78.9% |
| 1970 | 8.94 Percentage change | -576.0% |
| 1971 | 14.25 Percentage change | +59.3% |
| 1972 | -1.5 Percentage change | -110.5% |
| 1973 | 2.18 Percentage change | -245.5% |
| 1974 | 0.4883 Percentage change | -77.6% |
| 1975 | 10.1 Percentage change | +1968.3% |
| 1976 | -4.43 Percentage change | -143.9% |
| 1977 | -13.73 Percentage change | +209.9% |
| 1978 | 4.13 Percentage change | -130.1% |
| 1979 | 1.32 Percentage change | -67.9% |
| 1980 | 3.41 Percentage change | +157.3% |
| 1981 | 2.76 Percentage change | -19.0% |
| 1982 | 19.32 Percentage change | +600.2% |
| 1983 | 20.57 Percentage change | +6.5% |
| 1984 | 21.86 Percentage change | +6.2% |
| 1985 | 2.66 Percentage change | -87.8% |
| 1986 | 6.71 Percentage change | +152.1% |
| 1987 | -9.37 Percentage change | -239.6% |
| 1988 | -7.07 Percentage change | -24.6% |
| 1989 | 3.85 Percentage change | -154.4% |
| 1990 | -5.66 Percentage change | -247.0% |
| 1991 | -2.99 Percentage change | -47.1% |
| 1992 | -10.53 Percentage change | +252.0% |
| 1993 | -8.16 Percentage change | -22.5% |
| 1994 | -9.37 Percentage change | +14.8% |
| 1995 | 3.83 Percentage change | -140.9% |
| 1996 | 7.93 Percentage change | +106.9% |
| 1997 | 7.96 Percentage change | +0.4% |
| 1998 | 10.2 Percentage change | +28.2% |
| 1999 | -1.96 Percentage change | -119.2% |
| 2000 | -5.03 Percentage change | +156.1% |
| 2001 | -7.16 Percentage change | +42.5% |
| 2002 | -13.13 Percentage change | +83.4% |
| 2003 | -7.02 Percentage change | -46.6% |
| 2004 | 0.9254 Percentage change | -113.2% |
| 2005 | 1.02 Percentage change | +10.4% |
| 2006 | 2.44 Percentage change | +139.2% |
| 2007 | -10.43 Percentage change | -526.9% |
| 2008 | -8.9 Percentage change | -14.6% |
| 2009 | -5.86 Percentage change | -34.2% |
| 2010 | 0.6023 Percentage change | -110.3% |
| 2011 | 6.33 Percentage change | +951.2% |
| 2012 | -9.32 Percentage change | -247.2% |
| 2013 | -1.8 Percentage change | -80.7% |
| 2014 | 1.09 Percentage change | -160.8% |
| 2015 | -9.95 Percentage change | -1010.7% |
| 2016 | -4.37 Percentage change | -56.1% |
| 2017 | 3.28 Percentage change | -175.1% |
| 2018 | -7.55 Percentage change | -330.0% |
| 2019 | -3.68 Percentage change | -51.2% |
| 2020 | -5.09 Percentage change | +38.4% |
| 2021 | -5.43 Percentage change | +6.7% |
| 2022 | -5.96 Percentage change | +9.7% |
| 2023 | -1.51 Percentage change | -74.7% |
| 2024 | -1.52 Percentage change | +0.9% |
| 2025 | 0.6987 Percentage change | -145.9% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1950s | 2.98 Percentage change | -11.04 Percentage change | 11.79 Percentage change | 10 |
| 1960s | 1.67 Percentage change | -8.91 Percentage change | 15.67 Percentage change | 10 |
| 1970s | 2.18 Percentage change | -13.73 Percentage change | 14.25 Percentage change | 10 |
| 1980s | 6.47 Percentage change | -9.37 Percentage change | 21.86 Percentage change | 10 |
| 1990s | -0.876 Percentage change | -10.53 Percentage change | 10.2 Percentage change | 10 |
| 2000s | -5.31 Percentage change | -13.13 Percentage change | 2.44 Percentage change | 10 |
| 2010s | -2.54 Percentage change | -9.95 Percentage change | 6.33 Percentage change | 10 |
| 2020s | -3.14 Percentage change | -5.96 Percentage change | 0.6987 Percentage change | 6 |
More environment data for Boise City-Nampa, ID
- Historical exposure to drought — Cropland soil moisture anomaly -1.08 Percentage change (2025)
- River flooding exposure — Cropland share exposed to river flooding 6.84 Percentage of agricultural land area (2022)
Frequently asked questions
- What is historical exposure to drought — land soil moisture anomaly in Boise City-Nampa, ID?
- Historical exposure to drought — land soil moisture anomaly in Boise City-Nampa, ID was 0.6987 Percentage change in 2025, according to Organisation for Economic Co-operation and Development.
- What is the highest historical exposure to drought — land soil moisture anomaly recorded in Boise City-Nampa, ID?
- The highest recorded value was 21.86 Percentage change in 1984.
- What is the lowest historical exposure to drought — land soil moisture anomaly recorded in Boise City-Nampa, ID?
- The lowest recorded value was -13.73 Percentage change in 1977.
- How does Boise City-Nampa, ID rank for historical exposure to drought — land soil moisture anomaly?
- Boise City-Nampa, ID ranks 746th out of 3112 regions with data for 2025.
- Is historical exposure to drought — land soil moisture anomaly rising or falling in Boise City-Nampa, ID?
- Over the last ten years it is up 107.0%. The long-run trend across the full record is volatile.
- Where does this Boise City-Nampa, ID data come from?
- The figures come from Organisation for Economic Co-operation and Development, published as part of Historical exposure to drought — Land soil moisture anomaly. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 76 observations, free to reuse under OECD Terms and Conditions (attribution required).
About this data
The dataset provides annual anomalies in land and cropland soil moisture content of the top soil layer (0 to 7 cm) compared to the reference period 1981-2010. Exposure indicators to drought have been prepared by the Organisation for Economic Co-operation and Development (OECD). Please see the working paper for a more complete description of the methods. The datasets span the period 1981-2024 and is the result of the use of a variety of geospatial data sources, including the ERA5-Land averaged monthly data of volumetric soil moisture and ESA CCI land cover data. Average anomalies have been calculated for both land and cropland exposure to drought. The dataset has a global coverage on a national level; on the sub-national TL2 level (i.e. large subnational regions) results are reported for all OECD countries as well as for Argentina, Brazil, China, India, Indonesia and South Africa. A number of aggregates are included: Euro area, European Union, Advanced economies, Emerging market economies, G7, G20, OECD, OECD Europe, OECD Asia Oceania, OECD Americas and the LAC region. Data source(s): Copernicus Climate Change Initiative land cover data and Copernicus Climate Data Store monthly soil moisture data based on the ERA5-Land reanalysis dataset. Contact: ENV.Stat@oecd.org