Monthly outlook for Harrisburg, FL: average high 93.8°, average low 77°. That is 3° above the climate normal for August. Precipitation is expected on 7 days (about 1.2 inches), against a normal of 13 days and 3.4 inches. The warmest day looks like 12 August (97.2°), the coolest 10 August (74.1°).
93.8°/77°
Average high / low
+3°
Above normal
7 / 13
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
93.8°
88.5°
+2.9°
19 August – 28 August
93.9°
88.1°
+3.2°
29 August – 7 September
at normal
87.5°
—
August records over 66 years
97°8 August 2023All-time high
70.5°14 August 2018All-time low
Climate normals and records are computed from the nearest reference point — Moore Haven (15 mi).
Mon, 1091° / 74°0
91 °
Harrisburg, Monday, 10 August
Overcast. High 91°, low 74°.
Pressure30.15 inHg
Wind6 mph SE
Humidity58%
Visibility6.2 mi
Dew point73°
Tue, 1194° / 76°0
94 °
Harrisburg, Tuesday, 11 August
Clear. High 94°, low 76°.
Pressure30.15 inHg
Wind4.7 mph E
Humidity55%
Visibility6.2 mi
Dew point72°
Wed, 1297° / 77°0.02
97 °
Harrisburg, Wednesday, 12 August
Light rain. High 97°, low 77°.
Pressure30.06 inHg
Wind2.4 mph SW
Humidity52%
Visibility6.2 mi
Dew point73°
Thu, 1396° / 78°0.09
96 °
Harrisburg, Thursday, 13 August
Light rain. High 96°, low 78°.
Pressure30.03 inHg
Wind10.6 mph NE
Humidity44%
Visibility—
Dew point69°
Fri, 1493° / 77°0
93 °
Harrisburg, Friday, 14 August
Overcast. High 93°, low 77°.
Pressure30.15 inHg
Wind8.1 mph E
Humidity49%
Visibility—
Dew point69°
Sat, 1594° / 77°0.03
94 °
Harrisburg, Saturday, 15 August
Light rain. High 94°, low 77°.
Pressure30.12 inHg
Wind8.6 mph SE
Humidity48%
Visibility—
Dew point70°
Sun, 1697° / 77°0.04
97 °
Harrisburg, Sunday, 16 August
Light rain. High 97°, low 77°.
Pressure30.09 inHg
Wind7.9 mph SE
Humidity44%
Visibility—
Dew point67°
Mon, 1792° / 78°0.19
92 °
Harrisburg, Monday, 17 August
Light rain. High 92°, low 78°.
Pressure30.03 inHg
Wind6.8 mph SE
Humidity55%
Visibility—
Dew point71°
Tue, 1895° / 78°0.02
95 °
Harrisburg, Tuesday, 18 August
Light rain. High 95°, low 78°.
Pressure30.00 inHg
Wind6.9 mph E
Humidity43%
Visibility—
Dew point67°
Wed, 1995° / 80°0.24
95 °
Harrisburg, Wednesday, 19 August
Rain. High 95°, low 80°.
Pressure30.00 inHg
Wind11.7 mph W
Humidity47%
Visibility—
Dew point69°
Thu, 2093° / 78°0.13
93 °
Harrisburg, Thursday, 20 August
Light rain. High 93°, low 78°.
Pressure29.97 inHg
Wind7.8 mph W
Humidity50%
Visibility—
Dew point70°
Fri, 2194° / 76°0
94 °
Harrisburg, Friday, 21 August
Overcast. High 94°, low 76°.
Pressure30.00 inHg
Wind7.2 mph SW
Humidity44%
Visibility—
Dew point66°
Sat, 2295° / 77°0.09
95 °
Harrisburg, Saturday, 22 August
Light rain. High 95°, low 77°.
Pressure30.03 inHg
Wind7 mph E
Humidity45%
Visibility—
Dew point68°
Sun, 2393° / 76°0.28
93 °
Harrisburg, Sunday, 23 August
Rain. High 93°, low 76°.
Pressure30.03 inHg
Wind11.3 mph E
Humidity47%
Visibility—
Dew point68°
Mon, 2493° / 76°0.06
93 °
Harrisburg, Monday, 24 August
Light rain. High 93°, low 76°.
Pressure30.03 inHg
Wind10.3 mph E
Humidity50%
Visibility—
Dew point69°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2588° / 76°0.22
88 °
Harrisburg, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.22 in
Chance of precipitation80%
Record high93° (2022)
Record low72° (2001)
Wed, 2688° / 76°0.22
88 °
Harrisburg, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.22 in
Chance of precipitation78%
Record high94° (2022)
Record low72° (2025)
Thu, 2788° / 76°0.16
88 °
Harrisburg, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.16 in
Chance of precipitation72%
Record high94° (2020)
Record low72° (1969)
Fri, 2888° / 76°0.18
88 °
Harrisburg, Friday, 28 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.18 in
Chance of precipitation75%
Record high93° (2023)
Record low71° (1997)
Sat, 2988° / 76°0.15
88 °
Harrisburg, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.15 in
Chance of precipitation68%
Record high93° (2020)
Record low71° (1984)
Sun, 3087° / 76°0.22
87 °
Harrisburg, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high87°
Average low76°
Average precipitation0.22 in
Chance of precipitation82%
Record high92° (1990)
Record low72° (2025)
Mon, 3188° / 76°0.19
88 °
Harrisburg, Monday, 31 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.19 in
Chance of precipitation75%
Record high93° (2023)
Record low73° (1967)
Tue, 0188° / 76°0.21
88 °
Harrisburg, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.21 in
Chance of precipitation80%
Record high93° (1998)
Record low72° (2022)
Wed, 0287° / 75°0.2
87 °
Harrisburg, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.2 in
Chance of precipitation68%
Record high92° (2020)
Record low71° (1975)
Thu, 0387° / 75°0.23
87 °
Harrisburg, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.23 in
Chance of precipitation77%
Record high92° (2020)
Record low72° (1960)
Fri, 0488° / 75°0.18
88 °
Harrisburg, Friday, 4 September
Climate normal for this date — 60-year average.
Average high88°
Average low75°
Average precipitation0.18 in
Chance of precipitation70%
Record high94° (2020)
Record low70° (1967)
Sat, 0587° / 75°0.32
87 °
Harrisburg, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.32 in
Chance of precipitation87%
Record high93° (2022)
Record low70° (2008)
Sun, 0687° / 75°0.22
87 °
Harrisburg, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.22 in
Chance of precipitation75%
Record high95° (2022)
Record low71° (1984)
Mon, 0787° / 75°0.21
87 °
Harrisburg, Monday, 7 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.21 in
Chance of precipitation68%
Record high97° (2022)
Record low70° (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 Harrisburg, 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 Harrisburg, 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.