Duck Key Weather in August
Average highs run from 90°F on August 1 to 89°F on August 31, and lows from 80°F to 79°F. Normal precipitation for the month is 5.74 in over about 11 wet days.
August day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
August at a glance
- Average high
- 89°F
- Average low
- 79°F
- Precipitation
- 5.74 in
- Record high
- 97°FAug 2, 2002
- Record low
- 70°FAug 18, 2007
- Chance of a freeze
- 0%
- Days of 90°F or more
- 17.4
- Daylight
- 13 h 16 min to 12 h 39 min
- Cloud cover
- 62%
- Humidity
- 75%
- Dew point
- 76°F
- Wind
- 8.7 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Aug 1 | 90°F | 80°F | 96°F 2023 | 74°F 2001 | 34% |
| Aug 2 | 90°F | 80°F | 97°F 2002 | 73°F 2004 | 34% |
| Aug 3 | 90°F | 80°F | 96°F 2002 | 73°F 1999 | 34% |
| Aug 4 | 90°F | 80°F | 96°F 2002 | 75°F 1999 | 34% |
| Aug 5 | 90°F | 80°F | 96°F 2002 | 74°F 2001 | 34% |
| Aug 6 | 90°F | 80°F | 97°F 2002 | 75°F 2004 | 34% |
| Aug 7 | 90°F | 80°F | 95°F 2002 | 75°F 2005 | 34% |
| Aug 8 | 90°F | 80°F | 95°F 2003 | 76°F 2005 | 34% |
| Aug 9 | 90°F | 80°F | 97°F 2023 | 73°F 2022 | 34% |
| Aug 10 | 90°F | 80°F | 97°F 2023 | 74°F 2010 | 33% |
| Aug 11 | 90°F | 80°F | 95°F 2015 | 74°F 2018 | 33% |
| Aug 12 | 90°F | 80°F | 95°F 2004 | 73°F 2004 | 33% |
| Aug 13 | 90°F | 80°F | 95°F 2015 | 74°F 1999 | 34% |
| Aug 14 | 90°F | 80°F | 95°F 2009 | 74°F 2016 | 34% |
| Aug 15 | 90°F | 80°F | 95°F 2011 | 72°F 2009 | 34% |
| Aug 16 | 90°F | 80°F | 94°F 2017 | 72°F 2003 | 34% |
| Aug 17 | 90°F | 80°F | 95°F 2023 | 72°F 2003 | 35% |
| Aug 18 | 89°F | 80°F | 94°F 2010 | 70°F 2007 | 35% |
| Aug 19 | 89°F | 80°F | 96°F 2022 | 74°F 2006 | 35% |
| Aug 20 | 89°F | 79°F | 95°F 2010 | 73°F 2003 | 36% |
| Aug 21 | 89°F | 79°F | 95°F 2022 | 72°F 2010 | 36% |
| Aug 22 | 89°F | 79°F | 95°F 2005 | 76°F 1999 | 36% |
| Aug 23 | 89°F | 79°F | 94°F 2022 | 75°F 1999 | 37% |
| Aug 24 | 89°F | 79°F | 96°F 2022 | 73°F 2010 | 37% |
| Aug 25 | 89°F | 79°F | 96°F 2022 | 73°F 2012 | 38% |
| Aug 26 | 89°F | 79°F | 95°F 2022 | 71°F 2021 | 38% |
| Aug 27 | 89°F | 79°F | 96°F 2022 | 73°F 2009 | 38% |
| Aug 28 | 89°F | 79°F | 96°F 2022 | 73°F 2013 | 39% |
| Aug 29 | 89°F | 79°F | 94°F 2001 | 75°F 2006 | 39% |
| Aug 30 | 89°F | 79°F | 94°F 2004 | 74°F 2003 | 39% |
| Aug 31 | 89°F | 79°F | 95°F 2023 | 75°F 2006 | 40% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- August 1
- sunrise 6:52 AM, sunset 8:08 PM
- August 31
- sunrise 7:04 AM, sunset 7:43 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00082441 (Duck Key), public domain. Records: NOAA GHCN-Daily, station USW00012896, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.