Monthly outlook for Islandia, FL: average high 87°, average low 83.2°. That is 0° below the climate normal for August. Precipitation is expected on 10 days (about 5.2 inches), against a normal of 14 days and 3.4 inches. The warmest day looks like 21 August (91.4°), the coolest 19 August (78.5°).
87°/83.2°
Average high / low
−0°
Below normal
10 / 14
Wet days / normal
5.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
86.4°
87.1°
-0.4°
19 August – 28 August
88°
86.7°
+0.7°
29 August – 7 September
at normal
86.1°
—
August records over 66 years
95°7 August 2015All-time high
72.3°11 August 1971All-time low
Climate normals and records are computed from the nearest reference point — Leisure City (14 mi).
Mon, 1086° / 84°0.03
86 °
Islandia, Monday, 10 August
Light rain. High 86°, low 84°.
Pressure30.15 inHg
Wind11.5 mph E
Humidity72%
Visibility6.2 mi
Dew point76°
Tue, 1186° / 84°0
86 °
Islandia, Tuesday, 11 August
Clear. High 86°, low 84°.
Pressure30.12 inHg
Wind10.8 mph E
Humidity69%
Visibility6.2 mi
Dew point74°
Wed, 1286° / 84°0
86 °
Islandia, Wednesday, 12 August
Overcast. High 86°, low 84°.
Pressure30.06 inHg
Wind7 mph SE
Humidity70%
Visibility6.2 mi
Dew point74°
Thu, 1386° / 82°0.05
86 °
Islandia, Thursday, 13 August
Light rain. High 86°, low 82°.
Pressure30.06 inHg
Wind11.9 mph SE
Humidity70%
Visibility—
Dew point74°
Fri, 1486° / 84°0.02
86 °
Islandia, Friday, 14 August
Light rain. High 86°, low 84°.
Pressure30.12 inHg
Wind15.5 mph E
Humidity68%
Visibility—
Dew point74°
Sat, 1586° / 84°0.35
86 °
Islandia, Saturday, 15 August
Rain. High 86°, low 84°.
Pressure30.15 inHg
Wind15.9 mph E
Humidity66%
Visibility—
Dew point73°
Sun, 1686° / 84°0
86 °
Islandia, Sunday, 16 August
Partly cloudy. High 86°, low 84°.
Pressure30.12 inHg
Wind15.4 mph E
Humidity66%
Visibility—
Dew point73°
Mon, 1786° / 84°0.04
86 °
Islandia, Monday, 17 August
Light rain. High 86°, low 84°.
Pressure30.09 inHg
Wind10.4 mph E
Humidity66%
Visibility—
Dew point73°
Tue, 1886° / 83°0.09
86 °
Islandia, Tuesday, 18 August
Light rain. High 86°, low 83°.
Pressure30.06 inHg
Wind8.4 mph E
Humidity67%
Visibility—
Dew point73°
Wed, 1986° / 79°1.28
86 °
Islandia, Wednesday, 19 August
Heavy rain. High 86°, low 79°.
Pressure30.00 inHg
Wind13.2 mph SW
Humidity70%
Visibility—
Dew point75°
Thu, 2090° / 82°0.79
90 °
Islandia, Thursday, 20 August
Rain. High 90°, low 82°.
Pressure29.94 inHg
Wind15.8 mph SW
Humidity65%
Visibility—
Dew point75°
Fri, 2191° / 82°1.8
91 °
Islandia, Friday, 21 August
Heavy rain. High 91°, low 82°.
Pressure29.94 inHg
Wind17.4 mph W
Humidity64%
Visibility—
Dew point76°
Sat, 2288° / 83°0.38
88 °
Islandia, Saturday, 22 August
Rain. High 88°, low 83°.
Pressure29.97 inHg
Wind14.9 mph SW
Humidity73%
Visibility—
Dew point78°
Sun, 2387° / 85°0.03
87 °
Islandia, Sunday, 23 August
Light rain. High 87°, low 85°.
Pressure30.03 inHg
Wind10.9 mph S
Humidity75%
Visibility—
Dew point78°
Mon, 2486° / 83°0.31
86 °
Islandia, Monday, 24 August
Rain. High 86°, low 83°.
Pressure30.03 inHg
Wind10 mph E
Humidity72%
Visibility—
Dew point75°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2586° / 77°0.28
86 °
Islandia, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.28 in
Chance of precipitation88%
Record high91° (2022)
Record low73° (1978)
Wed, 2687° / 77°0.3
87 °
Islandia, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high87°
Average low77°
Average precipitation0.3 in
Chance of precipitation92%
Record high91° (2022)
Record low73° (1969)
Thu, 2786° / 77°0.18
86 °
Islandia, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.18 in
Chance of precipitation78%
Record high91° (2025)
Record low74° (2019)
Fri, 2886° / 77°0.22
86 °
Islandia, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.22 in
Chance of precipitation90%
Record high91° (2023)
Record low73° (1984)
Sat, 2986° / 77°0.2
86 °
Islandia, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.2 in
Chance of precipitation75%
Record high91° (2025)
Record low73° (1969)
Sun, 3086° / 77°0.24
86 °
Islandia, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.24 in
Chance of precipitation88%
Record high91° (2021)
Record low73° (1994)
Mon, 3186° / 77°0.24
86 °
Islandia, Monday, 31 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.24 in
Chance of precipitation90%
Record high91° (2020)
Record low74° (2018)
Tue, 0187° / 77°0.19
87 °
Islandia, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high87°
Average low77°
Average precipitation0.19 in
Chance of precipitation85%
Record high91° (2023)
Record low73° (2021)
Wed, 0286° / 77°0.22
86 °
Islandia, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.22 in
Chance of precipitation78%
Record high91° (2025)
Record low73° (2010)
Thu, 0386° / 77°0.24
86 °
Islandia, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.24 in
Chance of precipitation82%
Record high91° (2020)
Record low73° (2021)
Fri, 0486° / 77°0.21
86 °
Islandia, Friday, 4 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.21 in
Chance of precipitation87%
Record high91° (2020)
Record low73° (2021)
Sat, 0586° / 77°0.22
86 °
Islandia, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.22 in
Chance of precipitation83%
Record high91° (2022)
Record low73° (2021)
Sun, 0686° / 77°0.25
86 °
Islandia, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.25 in
Chance of precipitation87%
Record high93° (2022)
Record low71° (2021)
Mon, 0786° / 76°0.19
86 °
Islandia, Monday, 7 September
Climate normal for this date — 60-year average.
Average high86°
Average low76°
Average precipitation0.19 in
Chance of precipitation83%
Record high91° (2022)
Record low72° (2023)
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 Islandia, 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 Islandia, 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.