Monthly outlook for Iona, TX: average high 104.3°, average low 78.5°. That is 5.4° above the climate normal for August. Precipitation is expected on 3 days (about 0.2 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 18 August (108.7°), the coolest 23 August (76°).
104.3°/78.5°
Average high / low
+5.4°
Above normal
3 / 3
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
103.3°
94.7°
+4.8°
18 August – 27 August
106°
94.2°
+6.5°
28 August – 6 September
at normal
91.2°
—
August records over 66 years
110.1°18 August 2023All-time high
59.4°25 August 1966All-time low
Climate normals and records are computed from the nearest reference point — Fort Worth (14 mi).
Sun, 0993° / 76°0.09
93 °
Iona, Sunday, 9 August
Rain. High 93°, low 76°.
Pressure29.97 inHg
Wind9.8 mph SW
Humidity34%
Visibility6.2 mi
Dew point64°
Mon, 10102° / 78°0
102 °
Iona, Monday, 10 August
Mostly clear. High 102°, low 78°.
Pressure30.00 inHg
Wind13.1 mph S
Humidity32%
Visibility6.2 mi
Dew point62°
Tue, 11104° / 79°0
104 °
Iona, Tuesday, 11 August
Clear. High 104°, low 79°.
Pressure29.97 inHg
Wind14 mph SW
Humidity32%
Visibility6.2 mi
Dew point63°
Wed, 12105° / 79°0
105 °
Iona, Wednesday, 12 August
Clear. High 105°, low 79°.
Pressure29.88 inHg
Wind15.2 mph S
Humidity31%
Visibility6.2 mi
Dew point62°
Thu, 13107° / 79°0
107 °
Iona, Thursday, 13 August
Overcast. High 107°, low 79°.
Pressure29.83 inHg
Wind22 mph S
Humidity25%
Visibility—
Dew point56°
Fri, 14105° / 78°0
105 °
Iona, Friday, 14 August
Partly cloudy. High 105°, low 78°.
Pressure29.94 inHg
Wind22.3 mph S
Humidity28%
Visibility—
Dew point59°
Sat, 15105° / 81°0
105 °
Iona, Saturday, 15 August
Overcast. High 105°, low 81°.
Pressure30.09 inHg
Wind18.2 mph S
Humidity24%
Visibility—
Dew point55°
Sun, 16105° / 81°0
105 °
Iona, Sunday, 16 August
Overcast. High 105°, low 81°.
Pressure30.06 inHg
Wind16.8 mph SW
Humidity24%
Visibility—
Dew point56°
Mon, 17107° / 80°0
107 °
Iona, Monday, 17 August
Mostly clear. High 107°, low 80°.
Pressure30.00 inHg
Wind17.3 mph S
Humidity23%
Visibility—
Dew point55°
Tue, 18109° / 79°0
109 °
Iona, Tuesday, 18 August
Mostly clear. High 109°, low 79°.
Pressure29.94 inHg
Wind14.3 mph S
Humidity20%
Visibility—
Dew point52°
Wed, 19108° / 80°0
108 °
Iona, Wednesday, 19 August
Overcast. High 108°, low 80°.
Pressure29.91 inHg
Wind19.2 mph S
Humidity23%
Visibility—
Dew point56°
Thu, 20108° / 79°0
108 °
Iona, Thursday, 20 August
Clear. High 108°, low 79°.
Pressure29.85 inHg
Wind17.4 mph S
Humidity23%
Visibility—
Dew point55°
Fri, 21108° / 78°0
108 °
Iona, Friday, 21 August
Partly cloudy. High 108°, low 78°.
Pressure29.85 inHg
Wind15.9 mph S
Humidity22%
Visibility—
Dew point54°
Sat, 22101° / 78°0.02
101 °
Iona, Saturday, 22 August
Light rain. High 101°, low 78°.
Pressure29.88 inHg
Wind16.2 mph S
Humidity39%
Visibility—
Dew point62°
Sun, 23103° / 76°0.06
103 °
Iona, Sunday, 23 August
Light rain. High 103°, low 76°.
Pressure29.91 inHg
Wind15.7 mph E
Humidity26%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2494° / 77°0.06
94 °
Iona, Monday, 24 August
Climate normal for this date — 60-year average.
Average high94°
Average low77°
Average precipitation0.06 in
Chance of precipitation13%
Record high105° (2011)
Record low63° (1961)
Tue, 2594° / 77°0.04
94 °
Iona, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high94°
Average low77°
Average precipitation0.04 in
Chance of precipitation12%
Record high107° (2023)
Record low59° (1966)
Wed, 2694° / 77°0.06
94 °
Iona, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high94°
Average low77°
Average precipitation0.06 in
Chance of precipitation20%
Record high107° (2023)
Record low63° (1966)
Thu, 2793° / 77°0.09
93 °
Iona, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high93°
Average low77°
Average precipitation0.09 in
Chance of precipitation25%
Record high105° (2011)
Record low66° (1966)
Fri, 2892° / 76°0.09
92 °
Iona, Friday, 28 August
Climate normal for this date — 60-year average.
Average high92°
Average low76°
Average precipitation0.09 in
Chance of precipitation30%
Record high106° (2011)
Record low63° (1992)
Sat, 2992° / 76°0.09
92 °
Iona, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high92°
Average low76°
Average precipitation0.09 in
Chance of precipitation22%
Record high105° (2020)
Record low64° (1986)
Sun, 3092° / 75°0.07
92 °
Iona, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high92°
Average low75°
Average precipitation0.07 in
Chance of precipitation23%
Record high103° (2011)
Record low64° (1986)
Mon, 3192° / 75°0.1
92 °
Iona, Monday, 31 August
Climate normal for this date — 60-year average.
Average high92°
Average low75°
Average precipitation0.1 in
Chance of precipitation25%
Record high104° (2011)
Record low66° (2004)
Tue, 0191° / 75°0.13
91 °
Iona, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high91°
Average low75°
Average precipitation0.13 in
Chance of precipitation32%
Record high104° (2000)
Record low67° (1968)
Wed, 0291° / 74°0.13
91 °
Iona, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high91°
Average low74°
Average precipitation0.13 in
Chance of precipitation27%
Record high105° (2000)
Record low63° (1987)
Thu, 0391° / 74°0.12
91 °
Iona, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high91°
Average low74°
Average precipitation0.12 in
Chance of precipitation28%
Record high105° (2000)
Record low60° (1974)
Fri, 0491° / 74°0.06
91 °
Iona, Friday, 4 September
Climate normal for this date — 60-year average.
Average high91°
Average low74°
Average precipitation0.06 in
Chance of precipitation27%
Record high108° (2000)
Record low57° (1974)
Sat, 0591° / 74°0.14
91 °
Iona, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high91°
Average low74°
Average precipitation0.14 in
Chance of precipitation28%
Record high103° (2000)
Record low57° (1974)
Sun, 0690° / 73°0.12
90 °
Iona, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high90°
Average low73°
Average precipitation0.12 in
Chance of precipitation22%
Record high102° (2023)
Record low56° (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 Iona, 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 Iona, 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.