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Washington County, OH

: September 2026 so far brought 5.79 in of precipitation in Washington County, OH, the wettest 1 to 29 September in the county average since 2018, 9th wettest 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
71°F
Coldest since 2023
35th coldest of 76
Low
53.2°F
Warmest since 2025
19th warmest of 76

No measurable precipitation in the county average of Washington County, OH for 4 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).

Every 29 September high of the county average in Washington County, OH since 1951: 71°F in 2026; the highest is 89.6°F, in 1959.
2023: 69.6°F1959: 89.6°F2026: 71°F 2026 71°F 1959 89.6°F since 2023 1951 2026
  • Normal range, 61.3 to 80.1°F
Every year as a table

Every 29 September low of the county average in Washington County, OH since 1951: 53.2°F in 2026; the lowest is 33.2°F, in 1951.

YearHigh, °FLow, °F
20267153.2
202584.757.5
202474.663.8
202369.656.2
202260.941.3
202174.852.9
202080.955.1
201988.262.6
20187151.5
201775.846.2
201677.746.7
201579.364
201478.551
20137747.6
201264.847.2
201172.653.3
201061.149.7
200967.453.1
200875.152.2
200774.646
200660.444.3
20058047.3
20047354.8
200360.344.2
20027450.5
200161.341.3
200064.439
199985.759.6
199878.251.3
199766.750.8
199664.446.4
199579.847.5
19946744.4
199362.940
199272.442.8
199167.341.3
199078.852.1
198970.439.4
198878.150
19878250
198683.664.7
198572.841.8
198452.539.1
198378.546.9
198268.949.6
198165.237
198074.344.1
197970.161.3
197867.537.3
197767.746.5
197661.743.7
197569.242
197477.558.9
197384.162.4
197274.862.2
19718561
197062.139.7
196966.139.3
196873.146
196752.344.2
196666.249.8
196573.346
196456.150.3
196375.847.5
196254.242.2
196167.234.7
196072.655
195989.661.4
195865.441.8
195766.638.2
195670.545.5
195577.349.9
195485.754.2
195385.544.9
195283.444.8
195161.333.2

The month

September 2026 so far averaged 70.6°F in Washington County, OH, the warmest 1 to 29 September in the county average since 2019, 4th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).

The month in words
  • August 2026 averaged 73.7°F in Washington County, OH, the warmest August in the county average since 2024, tied 37th warmest of 132 (with 2003) (county average from NOAA's monthly county data, 1895 to 2026).
  • Tuesday 29 September 2026: a high of 71°F averaged over Washington County, OH, the coldest 29 September day in the county average since 2023, tied 35th coldest of 76 (with 2018) (county average from NOAA gridded data, 1951 to 2026).
  • Tuesday 29 September 2026: a low of 53.2°F averaged over Washington County, OH, the warmest 29 September night in the county average since 2025, 19th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
Days of the month without a value
0

Nearby

Parkersburg, WV 8.1 mi, the nearest city with its own station