Annual precipitation in Rock Island County

Annual precipitation in Rock Island County was 33.23 inches in 2025, according to NOAA National Centers for Environmental Information. That is down 9% from 2024. That is the 38th highest of 102 counties in 2025.

2025, inches33.23

Change on 2024-9%

Rank38th of 102Counties in Illinois ranked

Series high50.792009

Series low19.982005

Next release: Wednesday, 6 October 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

Annual precipitation in Rock Island County, 1950 to 2025

inches. Source: NOAA NCEI, NOAA Climate at a Glance, January to December precipitation, counties. Retrieved 2026-10-12, published 2026-10-06.

All 76 values

Period	inches
2025	33.23
2024	36.5
2023	30.32
2022	31.8
2021	33.63
2020	38.02
2019	48.79
2018	43.97
2017	37.21
2016	38.66
2015	44.61
2014	38.51
2013	36.7
2012	28.01
2011	33.93
2010	44.19
2009	50.79
2008	46.93
2007	40.36
2006	34.89
2005	19.98
2004	35.49
2003	29.83
2002	34.62
2001	39.57
2000	38.01
1999	33.62
1998	47.04
1997	30.59
1996	31.47
1995	34.9
1994	29.53
1993	48.43
1992	38.91
1991	32.24
1990	49.57
1989	28.57
1988	22.46
1987	33.49
1986	38.29
1985	37.99
1984	37.12
1983	33.02
1982	43.05
1981	36.37
1980	34.65
1979	34.64
1978	29.62
1977	41.42
1976	26.47
1975	30.36
1974	40.27
1973	49.68
1972	40.09
1971	30.01
1970	44.82
1969	37.02
1968	29.43
1967	37.9
1966	32.67
1965	46.7
1964	31.74
1963	27.22
1962	30.67
1961	43.07
1960	37.86
1959	41.44
1958	27.75
1957	33.14
1956	22.79
1955	27.85
1954	38.86
1953	26.88
1952	30.83
1951	46.6
1950	32.02

Compared with Illinois and United States

Place	2025
Rock Island County	33.23
Illinois	32.96
United States	29.26

Rock Island County compared with nearby places

Under 29
29 to 30
30 to 31
31 to 36
36 to 42
42 and over

Annual precipitation, 2025, inches. Rock Island County is outlined. Same source and period for every area shown. Source: NOAA National Centers for Environmental Information. Boundaries: U.S. Census Bureau cartographic boundary files.

Rankings

US states by annual precipitation 50 places
Counties in Illinois by annual precipitation 102 places

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.

Values are area averages, not the reading at one weather station. NOAA revises the last two years every month.

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How to cite

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.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

NOAA National Centers for Environmental Information. (2026). NOAA Climate at a Glance, January to December precipitation, counties (Annual precipitation, Rock Island County, 1950 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping

MLA 9

NOAA Climate at a Glance, January to December precipitation, counties, Annual precipitation, Rock Island County, 1950 to 2025. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Invokely, https://invokely.ai/en/annual-precipitation/rock-island-county-illinois. Accessed 12 Oct. 2026.

Chicago (author-date)

NOAA National Centers for Environmental Information. 2026. NOAA Climate at a Glance, January to December precipitation, counties. Annual precipitation, Rock Island County, 1950 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Also distributed by Invokely, https://invokely.ai/en/annual-precipitation/rock-island-county-illinois.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December precipitation, counties, Annual precipitation, Rock Island County, 1950 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping, via Invokely: https://invokely.ai/en/annual-precipitation/rock-island-county-illinois (Accessed: 12 October 2026).

BibTeX

@misc{noaa_annual_precipitation_rock_island_2025,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December precipitation, counties: Annual precipitation, Rock Island County, 1950 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/annual-precipitation/rock-island-county-illinois. Publisher attribution: 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.},
}

RIS

TY  - DATA
AU  - NOAA National Centers for Environmental Information
TI  - NOAA Climate at a Glance, January to December precipitation, counties: Annual precipitation, Rock Island County, 1950 to 2025
PY  - 2026
DA  - 2026/10/06
PB  - NOAA National Centers for Environmental Information
DB  - Invokely
UR  - https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping
L2  - https://invokely.ai/en/annual-precipitation/rock-island-county-illinois
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/annual-precipitation/rock-island-county-illinois.
N1  - Publisher attribution: 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.
ER  -

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Questions

What is the annual precipitation in Rock Island County?

Where does this figure come from?

NOAA National Centers for Environmental Information. NOAA Climate at a Glance, January to December precipitation, counties. Retrieved by Invokely on 2026-10-12.

What was the highest annual precipitation in Rock Island County?

50.79 inches in 2009, the highest value since 1950 in this series.

Related statistics for Rock Island County

All statistics for Rock Island County | Rock Island County in figures