# Annual precipitation in Johnson County

Annual precipitation in Johnson County was 47.04 inches in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `precipitation_annual`
- Place id: `us-county-17087`
- Unit: inches
- Definition: Total precipitation from January to December, in inches: rain plus the water content of snow and other frozen precipitation. NOAA computes it from its climate divisional dataset (nClimDiv): station readings interpolated onto a 5 km grid and averaged over the area.
- Note: Values are area averages, not the reading at one weather station. NOAA revises the last two years every month.
- Source: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December precipitation, counties (https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping)
- Publisher page: https://invokely.ai/en/publishers/noaa-ncei
- Retrieved: 2026-10-12
- License: Public domain (US government work); NCEI asks users to cite the nClimDiv dataset
- Citation: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December precipitation, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.
- Web page: https://invokely.ai/en/annual-precipitation/johnson-county-illinois
- API: https://invokely.ai/api/v1/series?indicator=precipitation_annual&place=us-county-17087

| Period | inches |
|---|---:|
| 2025 | 47.04 |
| 2024 | 52.86 |
| 2023 | 47.49 |
| 2022 | 43.01 |
| 2021 | 45.91 |
| 2020 | 53.74 |
| 2019 | 61.76 |
| 2018 | 59.39 |
| 2017 | 44.43 |
| 2016 | 51.37 |
| 2015 | 58.85 |
| 2014 | 42.33 |
| 2013 | 54.16 |
| 2012 | 31.55 |
| 2011 | 70.88 |
| 2010 | 37.23 |
| 2009 | 56.31 |
| 2008 | 59.06 |
| 2007 | 45.82 |
| 2006 | 60.41 |
| 2005 | 41.72 |
| 2004 | 42.31 |
| 2003 | 50.78 |
| 2002 | 57.39 |
| 2001 | 53.17 |
| 2000 | 46.63 |
| 1999 | 39.51 |
| 1998 | 49.21 |
| 1997 | 46.48 |
| 1996 | 50.35 |
| 1995 | 45.15 |
| 1994 | 44.76 |
| 1993 | 57.67 |
| 1992 | 37.58 |
| 1991 | 41.96 |
| 1990 | 59.5 |
| 1989 | 45.22 |
| 1988 | 41.1 |
| 1987 | 39.03 |
| 1986 | 44.74 |
| 1985 | 56.45 |
| 1984 | 56.11 |
| 1983 | 53.98 |
| 1982 | 58.52 |
| 1981 | 44.57 |
| 1980 | 33.73 |
| 1979 | 56.12 |
| 1978 | 43.25 |
| 1977 | 47.53 |
| 1976 | 36.23 |
| 1975 | 55.79 |
| 1974 | 48.22 |
| 1973 | 55.83 |
| 1972 | 52.3 |
| 1971 | 37.8 |
| 1970 | 45.76 |
| 1969 | 49.98 |
| 1968 | 45.42 |
| 1967 | 45 |
| 1966 | 45.98 |
| 1965 | 45.72 |
| 1964 | 39.56 |
| 1963 | 31.53 |
| 1962 | 43.73 |
| 1961 | 53.27 |
| 1960 | 36.17 |
| 1959 | 45.51 |
| 1958 | 48.69 |
| 1957 | 61.95 |
| 1956 | 38.08 |
| 1955 | 38.47 |
| 1954 | 40.2 |
| 1953 | 31.19 |
| 1952 | 39.48 |
| 1951 | 55.82 |
| 1950 | 69.53 |