Monthly outlook for Key Colony Beach, FL: average high 86.1°, average low 84.1°. That is 1.2° above the climate normal for August. Precipitation is expected on 7 days (about 1.4 inches), against a normal of 9 days and 2.1 inches. The warmest day looks like 9 August (89.7°), the coolest 9 August (81°).
86.1°/84.1°
Average high / low
+1.2°
Above normal
7 / 9
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
86.5°
84°
+1.4°
19 August – 28 August
85.5°
84°
+0.8°
29 August – 7 September
at normal
83.5°
—
August records over 66 years
90°6 August 2023All-time high
75.6°3 August 1975All-time low
Mon, 1087° / 85°0.03
87 °
Key Colony Beach, Monday, 10 August
Light rain. High 87°, low 85°.
Pressure30.12 inHg
Wind13.2 mph E
Humidity71%
Visibility6.2 mi
Dew point76°
Tue, 1187° / 85°0
87 °
Key Colony Beach, Tuesday, 11 August
Clear. High 87°, low 85°.
Pressure30.09 inHg
Wind13.2 mph E
Humidity68%
Visibility6.2 mi
Dew point74°
Wed, 1286° / 85°0.01
86 °
Key Colony Beach, Wednesday, 12 August
Light rain. High 86°, low 85°.
Pressure30.06 inHg
Wind9.7 mph E
Humidity68%
Visibility6.2 mi
Dew point74°
Thu, 1387° / 85°0
87 °
Key Colony Beach, Thursday, 13 August
Overcast. High 87°, low 85°.
Pressure30.06 inHg
Wind12.3 mph SE
Humidity61%
Visibility—
Dew point71°
Fri, 1486° / 85°0.09
86 °
Key Colony Beach, Friday, 14 August
Light rain. High 86°, low 85°.
Pressure30.12 inHg
Wind18.9 mph E
Humidity67%
Visibility—
Dew point74°
Sat, 1586° / 85°0.34
86 °
Key Colony Beach, Saturday, 15 August
Rain. High 86°, low 85°.
Pressure30.15 inHg
Wind19.8 mph E
Humidity65%
Visibility—
Dew point73°
Sun, 1686° / 85°0.02
86 °
Key Colony Beach, Sunday, 16 August
Light rain. High 86°, low 85°.
Pressure30.09 inHg
Wind15 mph E
Humidity64%
Visibility—
Dew point72°
Mon, 1786° / 81°0.3
86 °
Key Colony Beach, Monday, 17 August
Rain. High 86°, low 81°.
Pressure30.03 inHg
Wind7.7 mph SW
Humidity60%
Visibility—
Dew point70°
Tue, 1885° / 84°0.07
85 °
Key Colony Beach, Tuesday, 18 August
Light rain. High 85°, low 84°.
Pressure30.00 inHg
Wind7.9 mph S
Humidity69%
Visibility—
Dew point74°
Wed, 1985° / 85°0
85 °
Key Colony Beach, Wednesday, 19 August
Overcast. High 85°, low 85°.
Pressure30.00 inHg
Wind10.7 mph S
Humidity69%
Visibility—
Dew point74°
Thu, 2086° / 84°0
86 °
Key Colony Beach, Thursday, 20 August
Partly cloudy. High 86°, low 84°.
Pressure30.00 inHg
Wind9.6 mph SE
Humidity66%
Visibility—
Dew point73°
Fri, 2185° / 84°0
85 °
Key Colony Beach, Friday, 21 August
Overcast. High 85°, low 84°.
Pressure30.00 inHg
Wind7.2 mph SE
Humidity66%
Visibility—
Dew point72°
Sat, 2285° / 84°0
85 °
Key Colony Beach, Saturday, 22 August
Overcast. High 85°, low 84°.
Pressure29.97 inHg
Wind7.6 mph E
Humidity66%
Visibility—
Dew point72°
Sun, 2386° / 83°0.14
86 °
Key Colony Beach, Sunday, 23 August
Light rain. High 86°, low 83°.
Pressure29.97 inHg
Wind15.6 mph SE
Humidity68%
Visibility—
Dew point73°
Mon, 2486° / 84°0.23
86 °
Key Colony Beach, Monday, 24 August
Rain. High 86°, low 84°.
Pressure30.03 inHg
Wind16.8 mph E
Humidity69%
Visibility—
Dew point74°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2584° / 80°0.19
84 °
Key Colony Beach, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high84°
Average low80°
Average precipitation0.19 in
Chance of precipitation75%
Record high88° (2025)
Record low76° (1978)
Wed, 2684° / 80°0.28
84 °
Key Colony Beach, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low80°
Average precipitation0.28 in
Chance of precipitation68%
Record high89° (2025)
Record low77° (1997)
Thu, 2784° / 80°0.14
84 °
Key Colony Beach, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high84°
Average low80°
Average precipitation0.14 in
Chance of precipitation62%
Record high88° (2025)
Record low76° (2000)
Fri, 2884° / 80°0.18
84 °
Key Colony Beach, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low80°
Average precipitation0.18 in
Chance of precipitation63%
Record high89° (2025)
Record low76° (2013)
Sat, 2984° / 80°0.19
84 °
Key Colony Beach, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low80°
Average precipitation0.19 in
Chance of precipitation73%
Record high88° (2025)
Record low77° (1997)
Sun, 3083° / 80°0.27
83 °
Key Colony Beach, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low80°
Average precipitation0.27 in
Chance of precipitation72%
Record high88° (2023)
Record low77° (1973)
Mon, 3184° / 80°0.17
84 °
Key Colony Beach, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low80°
Average precipitation0.17 in
Chance of precipitation65%
Record high88° (2023)
Record low77° (1965)
Tue, 0184° / 81°0.15
84 °
Key Colony Beach, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high84°
Average low81°
Average precipitation0.15 in
Chance of precipitation53%
Record high89° (2023)
Record low77° (1971)
Wed, 0284° / 81°0.19
84 °
Key Colony Beach, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high84°
Average low81°
Average precipitation0.19 in
Chance of precipitation57%
Record high86° (2020)
Record low77° (1977)
Thu, 0383° / 80°0.13
83 °
Key Colony Beach, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low80°
Average precipitation0.13 in
Chance of precipitation55%
Record high86° (2004)
Record low77° (1967)
Fri, 0483° / 80°0.15
83 °
Key Colony Beach, Friday, 4 September
Climate normal for this date — 60-year average.
Average high83°
Average low80°
Average precipitation0.15 in
Chance of precipitation63%
Record high86° (2020)
Record low77° (1976)
Sat, 0583° / 80°0.17
83 °
Key Colony Beach, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high83°
Average low80°
Average precipitation0.17 in
Chance of precipitation77%
Record high87° (2024)
Record low76° (1960)
Sun, 0683° / 80°0.17
83 °
Key Colony Beach, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high83°
Average low80°
Average precipitation0.17 in
Chance of precipitation72%
Record high86° (2024)
Record low77° (1976)
Mon, 0783° / 80°0.15
83 °
Key Colony Beach, Monday, 7 September
Climate normal for this date — 60-year average.
Average high83°
Average low80°
Average precipitation0.15 in
Chance of precipitation62%
Record high86° (2024)
Record low77° (1984)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Key Colony Beach, FL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Key Colony Beach, FL since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.