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Adams County, IL

: September 2026 so far averaged 73.9°F in Adams County, IL, the warmest 1 to 29 September in the county average since the data begin in 1951 (county average from NOAA gridded data, 1951 to 2026).

Last updated . This page normally updates every day; the latest update is late.

High
79.1°F
Warmest since 2025
21st warmest of 76
Low
51.7°F
Warmest since 2025
29th warmest of 76

No measurable precipitation in the county average of Adams County, IL for 1 day to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).

Every 29 September high of the county average in Adams County, IL since 1951: 79.1°F in 2026; the highest is 99.1°F, in 1953.
2025: 88.3°F1953: 99.1°F2026: 79.1°F 2026 79.1°F 1953 99.1°F since 2025 1951 2026
  • Normal range, 62.7 to 81°F
Every year as a table

Every 29 September low of the county average in Adams County, IL since 1951: 51.7°F in 2026; the lowest is 33.5°F, in 1984.

YearHigh, °FLow, °F
202679.151.7
202588.356.4
202478.260.5
202378.757.2
202263.440.9
20218859.2
202065.446.3
201977.264.1
201865.547.3
201774.347.6
20166351.5
201580.960.3
201483.657.1
201377.449.4
201270.845
201172.353
201073.948.9
200964.446.4
200878.959.1
200780.251
200662.843.2
20057041.3
200470.642.2
200358.736.4
200281.454.1
200167.645.1
200073.649
199956.946.7
19988263.4
199775.653.3
199668.644.9
199578.451.1
199471.846
199367.240.4
199262.139.3
199174.948.4
199077.256.6
19897541.6
198882.560.4
198779.356.5
19868766.8
198572.148.9
198454.933.5
19838455.7
198279.957.8
198170.546.2
198075.145.3
197985.954.5
197869.645.3
197772.449.5
197666.150.9
197567.849.2
197469.442.1
197379.261.3
197275.545.8
19718966.8
197074.745.8
196978.851.9
196874.951
196758.234.6
196668.750.9
196577.553.3
196467.839.7
196378.146.5
196270.238.8
196167.940.3
19607448.9
195970.948.7
195870.443.9
195770.436.2
195685.756.1
195581.958.7
195484.164.1
195399.165.6
195288.756.8
195161.236.1

The month

August 2026 averaged 75°F in Adams County, IL, the warmest August in the county average since 2022, tied 57th warmest of 132 (with 2002, 2001 and 1923) (county average from NOAA's monthly county data, 1895 to 2026).

The month in words
  • Tuesday 29 September 2026: a high of 79.1°F averaged over Adams County, IL, the warmest 29 September in the county average since 2025, 21st warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
  • Tuesday 29 September 2026: a low of 51.7°F averaged over Adams County, IL, the warmest 29 September night in the county average since 2025, 29th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
Days of the month without a value
0

Nearby

Quincy, IL 3.4 mi, the nearest city with its own station