Sinsinawa Weather Forecast
- 63
- 84
Mostly Cloudy
- 62
- 79
Rain Showers Likely
- 63
- 77
Chance Thunderstorms
- 61
- 78
Chance Rain Showers
- 61
- 78
Chance Rain Showers
- 59
- 76
Slight Chance Thunderstorms
- 57
- 74
Partly Sunny
Today 18 Sep Grant
Partly sunny with a 50 percent chance of Showers. Highs in the mid 80s. Light Winds.
Tonight 18 Sep Grant
Mostly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then a chance of Showers and Thunderstorms after midnight. Lows in the lower 60s. East Winds around 5 Mph. Chance of rain 50 percent.
Sinsinawa Temperature Statistics
September Temperature
Dubuque Regional Airport (11.8 miles)
Lowest 7 September, 2025
39.9 °FAverage September
64.3 °FHighest 14 September, 2025
87.1 °F
Climate (2020–Present)
Dubuque Regional Airport (11.8 miles)
Average Low 2020–2025
40.3 °FAverage 2020–2025
49.7 °FAverage High 2020–2025
58.9 °F