Michael D Beckwith / CC BY 2.0
Davenport, IA Weather on August 18
August 18th in Davenport, IA typically brings warm summer weather, with average highs around 83°F and lows near 65°F. Over 55 years of records, the warmest August 18th was in 1988 (86°F average), while the coldest was 1977 (62°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 36% of August 18th dates historically, with the wettest August 18th recording 2.69" of rain. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
What to Expect on August 18
Planning for August 18th in Davenport, IA? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
August 18 Weather Records for Davenport
- •The all-time record high for August 18th in Davenport, IA is 99°F, set in 1988.
- •The coldest August 18th on record dropped to 52°F in 1981.
- •Temperatures have reached 90°F or higher on August 18th in 10 of the last 55 years.
Frequently Asked Questions
What was the warmest August 18 ever in Davenport?
The warmest August 18 in Davenport, IA reached 99°F in 1988. That is 16°F above the long-term average high of 83°F.
What was the coldest August 18 ever in Davenport?
The coldest August 18 in Davenport, IA dropped to 52°F in 1981. That is 13°F below the long-term average low of 65°F.
What is the average temperature on August 18 in Davenport?
On August 18, Davenport averages a high of 83°F and a low of 65°F based on 55 years of NOAA weather observations from DAVENPORT L&D 15.
How many years of weather data are available for August 18 in Davenport?
We have 55 years of weather records for August 18 in Davenport, IA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
August 18 Weather History in Davenport
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 92°F | 55°F | 0.82" | -- |
| 2024 | 82°F | 69°F | 0" | -- |
| 2023 | 80°F | 58°F | 0" | -- |
| 2022 | 86°F | 61°F | 0" | -- |
| 2021 | 91°F | 67°F | 0" | -- |
| 2020 | 80°F | 58°F | 0" | -- |
| 2019 | 83°F | 65°F | 0.11" | -- |
| 2018 | 83°F | 66°F | 0" | -- |
| 2017 | 82°F | 60°F | 0" | -- |
| 2016 | 89°F | 72°F | 0" | -- |
| 2015 | 82°F | 66°F | 0.93" | -- |
| 2014 | 84°F | 69°F | 0" | -- |
| 2013 | 81°F | 60°F | 0" | -- |
| 2012 | 76°F | 55°F | 0" | -- |
| 2011 | 86°F | 64°F | 0" | -- |
| 2010 | 82°F | 64°F | 0.3" | -- |
| 2009 | 77°F | 68°F | 0.17" | -- |
| 2008 | 82°F | 71°F | 0" | -- |
| 2007 | 74°F | 63°F | 0.01" | -- |
| 2006 | 77°F | 71°F | 0.11" | -- |
| 2005 | 92°F | 67°F | 0" | -- |
| 2004 | 80°F | 60°F | 0.01" | -- |
| 2003 | 87°F | 69°F | 0" | -- |
| 2002 | 75°F | 57°F | 0" | -- |
| 2001 | 79°F | 61°F | 0" | -- |
| 2000 | 76°F | 60°F | 0.04" | -- |
| 1999 | 74°F | 67°F | 0" | -- |
| 1998 | 79°F | 69°F | 0.67" | -- |
| 1997 | 79°F | 62°F | 0.15" | -- |
| 1996 | 77°F | 67°F | 0.02" | -- |
| 1995 | 94°F | 76°F | 1.26" | -- |
| 1994 | 85°F | 66°F | 0.05" | -- |
| 1993 | 83°F | 63°F | 0" | -- |
| 1992 | 79°F | 64°F | 0.01" | -- |
| 1991 | 85°F | 66°F | 0.02" | -- |
| 1990 | 92°F | 76°F | 1.61" | -- |
| 1989 | 81°F | 62°F | 0" | -- |
| 1988 | 99°F | 74°F | 0" | -- |
| 1987 | 84°F | 62°F | 0" | -- |
| 1986 | 80°F | 65°F | 0.09" | -- |
| 1985 | 78°F | 62°F | 0" | -- |
| 1984 | 83°F | 68°F | 0" | -- |
| 1983 | 94°F | 75°F | 0" | -- |
| 1982 | 86°F | 64°F | 0" | -- |
| 1981 | 75°F | 52°F | 0" | -- |
| 1980 | 87°F | 65°F | 0.16" | -- |
| 1979 | 89°F | 66°F | 2.69" | -- |
| 1978 | 95°F | 71°F | 0" | -- |
| 1977 | 72°F | 53°F | 0" | -- |
| 1976 | 86°F | 64°F | 0" | -- |
| 1975 | 75°F | 64°F | 0" | -- |
| 1974 | 83°F | 63°F | 0" | -- |
| 1973 | 90°F | 68°F | 0" | -- |
| 1972 | 95°F | 73°F | 0" | -- |
| 1971 | 85°F | 62°F | 0" | -- |
Based on 55 years of data from NOAA station: DAVENPORT L&D 15
Monthly Climate Averages
Historical temperature and precipitation averages for Davenport, IA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.