Monthly outlook for Prosper, TX: average high 103.8°, average low 80.8°. That is 6° above the climate normal for August. Precipitation is expected on 0 days (about 0.1 inches), against a normal of 3 days and 1.1 inches. The warmest day looks like 18 August (108.2°), the coolest 8 August (74.1°).
103.8°/80.8°
Average high / low
+6°
Above normal
0 / 3
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
102.7°
93.1°
+5.3°
18 August – 27 August
105.8°
92.7°
+7.3°
28 August – 6 September
at normal
89.9°
—
August records over 66 years
109°18 August 2023All-time high
59.4°25 August 1966All-time low
Climate normals and records are computed from the nearest reference point — Frisco (6 mi).
Sun, 0996° / 76°0
96 °
Prosper, Sunday, 9 August
Partly cloudy. High 96°, low 76°.
Pressure30.00 inHg
Wind11.3 mph S
Humidity39%
Visibility6.2 mi
Dew point66°
Mon, 10103° / 80°0
103 °
Prosper, Monday, 10 August
Clear. High 103°, low 80°.
Pressure30.00 inHg
Wind13.7 mph S
Humidity35%
Visibility6.2 mi
Dew point64°
Tue, 11104° / 82°0
104 °
Prosper, Tuesday, 11 August
Light rain. High 104°, low 82°.
Pressure29.97 inHg
Wind14.5 mph SW
Humidity36%
Visibility6.2 mi
Dew point65°
Wed, 12105° / 82°0
105 °
Prosper, Wednesday, 12 August
Mostly clear. High 105°, low 82°.
Pressure29.91 inHg
Wind14.8 mph S
Humidity33%
Visibility6.2 mi
Dew point64°
Thu, 13105° / 82°0
105 °
Prosper, Thursday, 13 August
Overcast. High 105°, low 82°.
Pressure29.85 inHg
Wind20.5 mph S
Humidity28%
Visibility—
Dew point59°
Fri, 14103° / 81°0.02
103 °
Prosper, Friday, 14 August
Light rain. High 103°, low 81°.
Pressure29.97 inHg
Wind20.6 mph S
Humidity32%
Visibility—
Dew point62°
Sat, 1597° / 85°0
97 °
Prosper, Saturday, 15 August
Overcast. High 97°, low 85°.
Pressure30.12 inHg
Wind18.4 mph S
Humidity44%
Visibility—
Dew point62°
Sun, 16105° / 83°0
105 °
Prosper, Sunday, 16 August
Overcast. High 105°, low 83°.
Pressure30.06 inHg
Wind14.6 mph SE
Humidity28%
Visibility—
Dew point61°
Mon, 17107° / 84°0
107 °
Prosper, Monday, 17 August
Mostly clear. High 107°, low 84°.
Pressure30.00 inHg
Wind17.1 mph S
Humidity23%
Visibility—
Dew point56°
Tue, 18108° / 83°0
108 °
Prosper, Tuesday, 18 August
Mostly clear. High 108°, low 83°.
Pressure29.94 inHg
Wind15.1 mph SW
Humidity18%
Visibility—
Dew point51°
Wed, 19108° / 84°0
108 °
Prosper, Wednesday, 19 August
Clear. High 108°, low 84°.
Pressure29.91 inHg
Wind18.2 mph S
Humidity25%
Visibility—
Dew point59°
Thu, 20107° / 84°0
107 °
Prosper, Thursday, 20 August
Clear. High 107°, low 84°.
Pressure29.85 inHg
Wind16.8 mph S
Humidity24%
Visibility—
Dew point58°
Fri, 21108° / 81°0.02
108 °
Prosper, Friday, 21 August
Light rain. High 108°, low 81°.
Pressure29.85 inHg
Wind17.9 mph S
Humidity24%
Visibility—
Dew point57°
Sat, 22100° / 78°0.01
100 °
Prosper, Saturday, 22 August
Light rain. High 100°, low 78°.
Pressure29.88 inHg
Wind14.2 mph NE
Humidity41%
Visibility—
Dew point64°
Sun, 23104° / 75°0.03
104 °
Prosper, Sunday, 23 August
Light rain. High 104°, low 75°.
Pressure29.91 inHg
Wind15.1 mph NE
Humidity24%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2493° / 76°0.05
93 °
Prosper, Monday, 24 August
Climate normal for this date — 60-year average.
Average high93°
Average low76°
Average precipitation0.05 in
Chance of precipitation13%
Record high104° (2023)
Record low63° (1961)
Tue, 2592° / 76°0.02
92 °
Prosper, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high92°
Average low76°
Average precipitation0.02 in
Chance of precipitation13%
Record high107° (2023)
Record low59° (1966)
Wed, 2692° / 76°0.04
92 °
Prosper, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high92°
Average low76°
Average precipitation0.04 in
Chance of precipitation15%
Record high107° (2023)
Record low65° (1966)
Thu, 2792° / 76°0.05
92 °
Prosper, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high92°
Average low76°
Average precipitation0.05 in
Chance of precipitation20%
Record high103° (2011)
Record low66° (1966)
Fri, 2891° / 75°0.07
91 °
Prosper, Friday, 28 August
Climate normal for this date — 60-year average.
Average high91°
Average low75°
Average precipitation0.07 in
Chance of precipitation27%
Record high104° (2011)
Record low62° (1992)
Sat, 2991° / 75°0.08
91 °
Prosper, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high91°
Average low75°
Average precipitation0.08 in
Chance of precipitation23%
Record high104° (2020)
Record low64° (1986)
Sun, 3091° / 74°0.07
91 °
Prosper, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high91°
Average low74°
Average precipitation0.07 in
Chance of precipitation28%
Record high101° (2011)
Record low64° (1986)
Mon, 3190° / 75°0.09
90 °
Prosper, Monday, 31 August
Climate normal for this date — 60-year average.
Average high90°
Average low75°
Average precipitation0.09 in
Chance of precipitation25%
Record high102° (2000)
Record low65° (2004)
Tue, 0190° / 74°0.17
90 °
Prosper, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.17 in
Chance of precipitation28%
Record high103° (2000)
Record low66° (1986)
Wed, 0290° / 74°0.14
90 °
Prosper, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high90°
Average low74°
Average precipitation0.14 in
Chance of precipitation35%
Record high104° (2000)
Record low63° (1987)
Thu, 0389° / 74°0.09
89 °
Prosper, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high89°
Average low74°
Average precipitation0.09 in
Chance of precipitation32%
Record high104° (2000)
Record low60° (1974)
Fri, 0489° / 74°0.07
89 °
Prosper, Friday, 4 September
Climate normal for this date — 60-year average.
Average high89°
Average low74°
Average precipitation0.07 in
Chance of precipitation25%
Record high107° (2000)
Record low58° (1974)
Sat, 0589° / 73°0.14
89 °
Prosper, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high89°
Average low73°
Average precipitation0.14 in
Chance of precipitation23%
Record high102° (2023)
Record low55° (1974)
Sun, 0689° / 72°0.12
89 °
Prosper, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high89°
Average low72°
Average precipitation0.12 in
Chance of precipitation22%
Record high100° (2023)
Record low55° (1974)
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 Prosper, TX 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 Prosper, TX 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.