Monthly outlook for Superior, IA: average high 85.1°, average low 59.9°. That is 3.8° above the climate normal for August. Precipitation is expected on 6 days (about 0.6 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 18 August (99.4°), the coolest 21 August (49.6°).
85.1°/59.9°
Average high / low
+3.8°
Above normal
6 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
85.3°
78.3°
+3.8°
18 August – 27 August
84.8°
78.3°
+3.6°
28 August – 6 September
at normal
77.1°
—
August records over 66 years
97.3°2 August 2022All-time high
44.2°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Jackson (14 mi).
Sun, 0985° / 65°0.04
85 °
Superior, Sunday, 9 August
Light rain. High 85°, low 65°.
Pressure29.77 inHg
Wind0.9 mph NW
Humidity54%
Visibility6.2 mi
Dew point69°
Mon, 1096° / 66°0.08
96 °
Superior, Monday, 10 August
Rain. High 96°, low 66°.
Pressure29.85 inHg
Wind11.1 mph E
Humidity55%
Visibility6.2 mi
Dew point66°
Tue, 1188° / 64°0.2
88 °
Superior, Tuesday, 11 August
Rain. High 88°, low 64°.
Pressure29.83 inHg
Wind11.7 mph NE
Humidity50%
Visibility6.2 mi
Dew point62°
Wed, 1287° / 66°0
87 °
Superior, Wednesday, 12 August
Overcast. High 87°, low 66°.
Pressure29.91 inHg
Wind12.8 mph NE
Humidity27%
Visibility6.2 mi
Dew point48°
Thu, 1381° / 60°0
81 °
Superior, Thursday, 13 August
Light rain. High 81°, low 60°.
Pressure30.00 inHg
Wind11.5 mph NE
Humidity40%
Visibility—
Dew point48°
Fri, 1484° / 57°0
84 °
Superior, Friday, 14 August
Overcast. High 84°, low 57°.
Pressure30.09 inHg
Wind10.7 mph NE
Humidity32%
Visibility—
Dew point46°
Sat, 1575° / 61°0
75 °
Superior, Saturday, 15 August
Overcast. High 75°, low 61°.
Pressure30.18 inHg
Wind14.4 mph SE
Humidity53%
Visibility—
Dew point55°
Sun, 1684° / 57°0
84 °
Superior, Sunday, 16 August
Overcast. High 84°, low 57°.
Pressure30.09 inHg
Wind8.2 mph SW
Humidity50%
Visibility—
Dew point57°
Mon, 1792° / 64°0
92 °
Superior, Monday, 17 August
Partly cloudy. High 92°, low 64°.
Pressure29.97 inHg
Wind12.8 mph E
Humidity39%
Visibility—
Dew point58°
Tue, 1899° / 65°0
99 °
Superior, Tuesday, 18 August
Clear. High 99°, low 65°.
Pressure29.88 inHg
Wind14.8 mph N
Humidity27%
Visibility—
Dew point52°
Wed, 1979° / 58°0.15
79 °
Superior, Wednesday, 19 August
Rain. High 79°, low 58°.
Pressure30.06 inHg
Wind14.1 mph N
Humidity37%
Visibility—
Dew point46°
Thu, 2067° / 56°0.05
67 °
Superior, Thursday, 20 August
Light rain. High 67°, low 56°.
Pressure30.18 inHg
Wind7.7 mph S
Humidity84%
Visibility—
Dew point54°
Fri, 2182° / 50°0
82 °
Superior, Friday, 21 August
Overcast. High 82°, low 50°.
Pressure30.00 inHg
Wind16.9 mph SE
Humidity27%
Visibility—
Dew point37°
Sat, 2292° / 57°0.05
92 °
Superior, Saturday, 22 August
Light rain. High 92°, low 57°.
Pressure29.77 inHg
Wind17.2 mph NW
Humidity28%
Visibility—
Dew point47°
Sun, 2388° / 56°0
88 °
Superior, Sunday, 23 August
Clear. High 88°, low 56°.
Pressure29.94 inHg
Wind11.1 mph NW
Humidity26%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2479° / 63°0.09
79 °
Superior, Monday, 24 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.09 in
Chance of precipitation25%
Record high92° (2003)
Record low50° (1966)
Tue, 2578° / 63°0.11
78 °
Superior, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.11 in
Chance of precipitation28%
Record high91° (2020)
Record low50° (1964)
Wed, 2679° / 63°0.14
79 °
Superior, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.14 in
Chance of precipitation35%
Record high92° (1976)
Record low49° (2025)
Thu, 2778° / 63°0.13
78 °
Superior, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.13 in
Chance of precipitation35%
Record high91° (2013)
Record low49° (1986)
Fri, 2878° / 62°0.11
78 °
Superior, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.11 in
Chance of precipitation35%
Record high94° (1984)
Record low44° (1986)
Sat, 2978° / 62°0.06
78 °
Superior, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.06 in
Chance of precipitation17%
Record high93° (2012)
Record low48° (1988)
Sun, 3078° / 61°0.09
78 °
Superior, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.09 in
Chance of precipitation30%
Record high96° (2012)
Record low47° (2009)
Mon, 3177° / 61°0.09
77 °
Superior, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation27%
Record high88° (1960)
Record low46° (1967)
Tue, 0177° / 60°0.06
77 °
Superior, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.06 in
Chance of precipitation22%
Record high91° (2011)
Record low45° (1974)
Wed, 0277° / 61°0.11
77 °
Superior, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.11 in
Chance of precipitation35%
Record high92° (2023)
Record low48° (1968)
Thu, 0376° / 60°0.09
76 °
Superior, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.09 in
Chance of precipitation27%
Record high91° (2023)
Record low39° (1974)
Fri, 0476° / 60°0.11
76 °
Superior, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.11 in
Chance of precipitation25%
Record high92° (2023)
Record low43° (2025)
Sat, 0576° / 60°0.06
76 °
Superior, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.06 in
Chance of precipitation25%
Record high89° (1960)
Record low41° (1962)
Sun, 0677° / 59°0.07
77 °
Superior, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low59°
Average precipitation0.07 in
Chance of precipitation15%
Record high96° (1976)
Record low44° (2025)
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 Superior, IA 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 Superior, IA 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.