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Benton County, IA

: September 2026 so far averaged 67.9°F in Benton County, IA, the warmest 1 to 29 September in the county average since 2015, 3rd warmest of 76 (county average from NOAA gridded data, 1951 to 2026).

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

High
76.7°F
Warmest since 2025
18th warmest of 76
Low
51.1°F
Warmest since 2024
22nd warmest of 76

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

Every 29 September low of the county average in Benton County, IA since 1951: 51.1°F in 2026; the lowest is 27.3°F, in 1984.
2024: 51.7°F1984: 27.3°F2026: 51.1°F 2026 51.1°F 1984 27.3°F since 2024 1951 2026
  • Normal range, 36.3 to 52.8°F
Every year as a table

Every 29 September high of the county average in Benton County, IA since 1951: 76.7°F in 2026; the highest is 92.2°F, in 1953.

YearHigh, °FLow, °F
202676.751.1
202585.650.8
202483.251.7
202375.158
202263.131.2
202183.754.4
20206043.7
201965.952.6
201850.636.6
201775.942.2
201664.547.9
201582.955
201481.853.1
201372.741.4
20127336.5
20117049.3
20107446
200960.241.9
200871.851.3
200775.144.4
200659.339.2
200561.538.1
200467.636.9
200355.131.5
200275.548.5
20016940.5
200073.447.2
199961.642.8
199879.752.8
19977653.1
199666.646.9
199580.550.7
199468.640.9
199361.535.9
199257.132.1
19916736.3
199071.448.1
19897741
198865.955.9
198771.752.1
198677.858.7
198562.144.4
198452.527.3
198383.356.4
198278.153.6
198166.137.5
198075.847.6
197981.854.5
197868.639.2
197771.843.7
197661.342.9
197562.348.7
197461.639.7
197367.560.1
197270.237.8
197186.353.3
197068.538.3
196971.944.4
196863.146
196756.729
196668.244.6
196575.354.4
19646534
196372.943.9
19626736
196159.733.5
196066.444.2
195963.440.4
195871.743.1
195769.234.2
19567845.1
19557552.7
195478.558.5
195392.258.9
195284.548.4
195155.932.5

The month

August 2026 averaged 71.2°F in Benton County, IA, the warmest August in the county average since 2023, tied 56th warmest of 132 (with 1990 and 1972) (county average from NOAA's monthly county data, 1895 to 2026).

The month in words
  • Tuesday 29 September 2026: a high of 76.7°F averaged over Benton County, IA, the warmest 29 September in the county average since 2025, 18th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
  • Tuesday 29 September 2026: a low of 51.1°F averaged over Benton County, IA, the warmest 29 September night in the county average since 2024, 22nd warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
Days of the month without a value
0

Nearby

Cedar Rapids, IA 22.4 mi, the nearest city with its own station