Climate averages 1991–2020
Davenport weather
in August.
A warm, wet month: the 2nd warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Davenport: daytime highs average 27.6°C and nights cool to about 19.0°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 90 mm of rain on roughly 9 days, which makes August a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 51 min on an average August day.
The nearest other city in this atlas is Iowa City (81 km away). In August its highs average 27.4°C, about as warm as Davenport, with 96 mm of rain.
Among the 498 cities listed in the United States, Davenport ranks joint 344th of 498 for the warmest August highs and joint 322nd of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Davenport is 2.3°C cooler than that mean.
From August to September, average highs fall by 3.8°C to 23.8°C, and monthly rainfall falls from 90 mm to 88 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Davenport climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.9°C-9.3°C | -9.3°C | 46 | 7.6 | 9.510 h |
| February | 1.8°C-7.2°C | -7.2°C | 49 | 6.7 | 10.611 h |
| March | 8.9°C-0.9°C | -0.9°C | 70 | 9.5 | 11.912 h |
| April | 15.6°C5.5°C | 5.5°C | 108 | 12.0 | 13.313 h |
| May | 21.6°C12.0°C | 12.0°C | 119 | 12.8 | 14.514 h |
| June | 26.6°C17.5°C | 17.5°C | 118 | 11.9 | 15.115 h |
| July | 28.5°C19.9°C | 19.9°C | 91 | 10.1 | 14.915 h |
| August, selected | 27.6°C19.0°C | 19.0°C | 90 | 9.2 | 13.814 h |
| September | 23.8°C14.8°C | 14.8°C | 88 | 8.3 | 12.513 h |
| October | 16.7°C8.2°C | 8.2°C | 70 | 8.5 | 11.111 h |
| November | 8.8°C1.1°C | 1.1°C | 61 | 7.8 | 9.910 h |
| December | 1.9°C-5.4°C | -5.4°C | 53 | 7.2 | 9.29 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Iowa City in AugustUnited States · 81 kmHigh 27.4°C · Low 18.4°C · 96 mm rain
- Cedar Rapids in AugustUnited States · 104 kmHigh 26.9°C · Low 17.8°C · 94 mm rain
- Peoria (Illinois), United States in AugustUnited States · 124 kmHigh 28.0°C · Low 19.4°C · 79 mm rain
- Rockford in AugustUnited States · 148 kmHigh 26.6°C · Low 17.7°C · 87 mm rain
- Bloomington (Illinois), United States in AugustUnited States · 176 kmHigh 27.6°C · Low 18.7°C · 82 mm rain
- Aurora (Illinois), United States in AugustUnited States · 189 kmHigh 26.9°C · Low 18.1°C · 92 mm rain
- Madison in AugustUnited States · 198 kmHigh 26.1°C · Low 17.2°C · 95 mm rain
- Elgin in AugustUnited States · 199 kmHigh 26.8°C · Low 18.2°C · 93 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Davenport) is explained once on the Davenport year overview and on the Sources, method and limits page.