Monthly outlook for Boynton Beach, FL: average high 91.8°, average low 82.1°. That is 2.7° above the climate normal for August. Precipitation is expected on 5 days (about 0.7 inches), against a normal of 14 days and 3.6 inches. The warmest day looks like 22 August (94.7°), the coolest 8 August (79.7°).
91.8°/82.1°
Average high / low
+2.7°
Above normal
5 / 14
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
91.5°
86.9°
+2.6°
18 August – 27 August
92.2°
86.5°
+3.2°
28 August – 6 September
at normal
85.9°
—
August records over 66 years
98.2°20 August 2025All-time high
72.7°28 August 1984All-time low
Climate normals and records are computed from the nearest reference point — Lantana (4 mi).
Sun, 0991° / 80°0
91 °
Boynton Beach, Sunday, 9 August
Partly cloudy. High 91°, low 80°.
Pressure30.12 inHg
Wind11 mph SE
Humidity58%
Visibility6.2 mi
Dew point73°
Mon, 1091° / 80°0
91 °
Boynton Beach, Monday, 10 August
Mostly clear. High 91°, low 80°.
Pressure30.15 inHg
Wind10.8 mph E
Humidity58%
Visibility6.2 mi
Dew point73°
Tue, 1191° / 83°0
91 °
Boynton Beach, Tuesday, 11 August
Clear. High 91°, low 83°.
Pressure30.12 inHg
Wind9.4 mph SE
Humidity51%
Visibility6.2 mi
Dew point69°
Wed, 1294° / 83°0.01
94 °
Boynton Beach, Wednesday, 12 August
Light rain. High 94°, low 83°.
Pressure30.06 inHg
Wind6.8 mph SE
Humidity52%
Visibility6.2 mi
Dew point71°
Thu, 1393° / 82°0.01
93 °
Boynton Beach, Thursday, 13 August
Light rain. High 93°, low 82°.
Pressure30.06 inHg
Wind11.5 mph SE
Humidity51%
Visibility—
Dew point71°
Fri, 1492° / 83°0
92 °
Boynton Beach, Friday, 14 August
Partly cloudy. High 92°, low 83°.
Pressure30.12 inHg
Wind12.3 mph E
Humidity50%
Visibility—
Dew point69°
Sat, 1589° / 84°0.2
89 °
Boynton Beach, Saturday, 15 August
Light rain. High 89°, low 84°.
Pressure30.15 inHg
Wind14.6 mph SE
Humidity57%
Visibility—
Dew point71°
Sun, 1691° / 83°0
91 °
Boynton Beach, Sunday, 16 August
Overcast. High 91°, low 83°.
Pressure30.15 inHg
Wind11.6 mph SE
Humidity48%
Visibility—
Dew point68°
Mon, 1791° / 83°0
91 °
Boynton Beach, Monday, 17 August
Light rain. High 91°, low 83°.
Pressure30.12 inHg
Wind12.3 mph E
Humidity54%
Visibility—
Dew point71°
Tue, 1890° / 83°0.03
90 °
Boynton Beach, Tuesday, 18 August
Light rain. High 90°, low 83°.
Pressure30.09 inHg
Wind11.6 mph E
Humidity48%
Visibility—
Dew point67°
Wed, 1991° / 83°0.01
91 °
Boynton Beach, Wednesday, 19 August
Light rain. High 91°, low 83°.
Pressure30.03 inHg
Wind12.6 mph SE
Humidity53%
Visibility—
Dew point70°
Thu, 2093° / 83°0.08
93 °
Boynton Beach, Thursday, 20 August
Light rain. High 93°, low 83°.
Pressure30.00 inHg
Wind11 mph S
Humidity48%
Visibility—
Dew point69°
Fri, 2190° / 83°0.05
90 °
Boynton Beach, Friday, 21 August
Light rain. High 90°, low 83°.
Pressure30.00 inHg
Wind9.1 mph SE
Humidity55%
Visibility—
Dew point71°
Sat, 2295° / 81°0.2
95 °
Boynton Beach, Saturday, 22 August
Light rain. High 95°, low 81°.
Pressure29.97 inHg
Wind8.7 mph S
Humidity45%
Visibility—
Dew point68°
Sun, 2394° / 80°0.02
94 °
Boynton Beach, Sunday, 23 August
Light rain. High 94°, low 80°.
Pressure29.94 inHg
Wind11.3 mph S
Humidity41%
Visibility—
Dew point65°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2486° / 77°0.31
86 °
Boynton Beach, Monday, 24 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.31 in
Chance of precipitation83%
Record high90° (2014)
Record low74° (1996)
Tue, 2586° / 77°0.23
86 °
Boynton Beach, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.23 in
Chance of precipitation90%
Record high91° (2025)
Record low73° (2002)
Wed, 2686° / 77°0.26
86 °
Boynton Beach, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.26 in
Chance of precipitation87%
Record high92° (1998)
Record low74° (1984)
Thu, 2786° / 77°0.22
86 °
Boynton Beach, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.22 in
Chance of precipitation83%
Record high92° (2011)
Record low74° (2017)
Fri, 2886° / 77°0.25
86 °
Boynton Beach, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.25 in
Chance of precipitation80%
Record high90° (2025)
Record low73° (1984)
Sat, 2986° / 77°0.21
86 °
Boynton Beach, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.21 in
Chance of precipitation80%
Record high91° (1999)
Record low73° (1994)
Sun, 3086° / 77°0.2
86 °
Boynton Beach, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.2 in
Chance of precipitation83%
Record high91° (2023)
Record low73° (1969)
Mon, 3186° / 77°0.26
86 °
Boynton Beach, Monday, 31 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.26 in
Chance of precipitation83%
Record high93° (2025)
Record low74° (1976)
Tue, 0186° / 77°0.22
86 °
Boynton Beach, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.22 in
Chance of precipitation90%
Record high92° (1998)
Record low74° (1972)
Wed, 0285° / 77°0.22
85 °
Boynton Beach, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high85°
Average low77°
Average precipitation0.22 in
Chance of precipitation80%
Record high91° (1998)
Record low74° (2022)
Thu, 0386° / 77°0.27
86 °
Boynton Beach, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.27 in
Chance of precipitation80%
Record high90° (2015)
Record low74° (1967)
Fri, 0486° / 77°0.28
86 °
Boynton Beach, Friday, 4 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.28 in
Chance of precipitation78%
Record high92° (2019)
Record low72° (1967)
Sat, 0586° / 77°0.38
86 °
Boynton Beach, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.38 in
Chance of precipitation87%
Record high91° (2019)
Record low71° (2008)
Sun, 0686° / 77°0.28
86 °
Boynton Beach, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.28 in
Chance of precipitation83%
Record high94° (2019)
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 Boynton 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 Boynton 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.