Monthly outlook for Runnells, IA: average high 85.1°, average low 64.9°. That is 1.6° above the climate normal for August. Precipitation is expected on 6 days (about 1.1 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 9 August (94.6°), the coolest 23 August (49.4°).
85.1°/64.9°
Average high / low
+1.6°
Above normal
6 / 5
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
85.6°
82.1°
+1.9°
18 August – 27 August
84.3°
82.2°
+1.1°
28 August – 6 September
at normal
80.7°
—
August records over 66 years
101.5°16 August 1983All-time high
45°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Des Moines (14 mi).
Sun, 0995° / 70°0.07
95 °
Runnells, Sunday, 9 August
Rain. High 95°, low 70°.
Pressure29.77 inHg
Wind12.8 mph SW
Humidity56%
Visibility6.2 mi
Dew point69°
Mon, 1090° / 69°0.01
90 °
Runnells, Monday, 10 August
Light rain. High 90°, low 69°.
Pressure29.85 inHg
Wind5.2 mph SW
Humidity57%
Visibility6.2 mi
Dew point68°
Tue, 1194° / 72°0.01
94 °
Runnells, Tuesday, 11 August
Light rain. High 94°, low 72°.
Pressure29.74 inHg
Wind11.3 mph W
Humidity49%
Visibility6.2 mi
Dew point69°
Wed, 1288° / 72°0.22
88 °
Runnells, Wednesday, 12 August
Rain. High 88°, low 72°.
Pressure29.85 inHg
Wind9 mph SE
Humidity70%
Visibility6.2 mi
Dew point70°
Thu, 1377° / 65°0.29
77 °
Runnells, Thursday, 13 August
Light rain. High 77°, low 65°.
Pressure29.94 inHg
Wind13 mph NE
Humidity77%
Visibility—
Dew point65°
Fri, 1478° / 57°0
78 °
Runnells, Friday, 14 August
Mostly clear. High 78°, low 57°.
Pressure30.21 inHg
Wind8.1 mph SE
Humidity49%
Visibility—
Dew point53°
Sat, 1580° / 58°0
80 °
Runnells, Saturday, 15 August
Overcast. High 80°, low 58°.
Pressure30.21 inHg
Wind11.6 mph SE
Humidity54%
Visibility—
Dew point56°
Sun, 1681° / 66°0
81 °
Runnells, Sunday, 16 August
Overcast. High 81°, low 66°.
Pressure30.06 inHg
Wind10.7 mph S
Humidity82%
Visibility—
Dew point69°
Mon, 1791° / 69°0
91 °
Runnells, Monday, 17 August
Overcast. High 91°, low 69°.
Pressure29.94 inHg
Wind8.7 mph NE
Humidity62%
Visibility—
Dew point70°
Tue, 1888° / 70°0.01
88 °
Runnells, Tuesday, 18 August
Light rain. High 88°, low 70°.
Pressure30.00 inHg
Wind6.9 mph S
Humidity65%
Visibility—
Dew point70°
Wed, 1993° / 70°0.25
93 °
Runnells, Wednesday, 19 August
Rain. High 93°, low 70°.
Pressure29.85 inHg
Wind13.2 mph NE
Humidity45%
Visibility—
Dew point65°
Thu, 2085° / 65°0.16
85 °
Runnells, Thursday, 20 August
Light rain. High 85°, low 65°.
Pressure29.94 inHg
Wind11.5 mph NE
Humidity60%
Visibility—
Dew point63°
Fri, 2184° / 63°0
84 °
Runnells, Friday, 21 August
Partly cloudy. High 84°, low 63°.
Pressure29.97 inHg
Wind7.3 mph S
Humidity51%
Visibility—
Dew point59°
Sat, 2283° / 64°0.04
83 °
Runnells, Saturday, 22 August
Light rain. High 83°, low 64°.
Pressure29.94 inHg
Wind15.3 mph NE
Humidity56%
Visibility—
Dew point64°
Sun, 2373° / 49°0
73 °
Runnells, Sunday, 23 August
Mostly clear. High 73°, low 49°.
Pressure30.21 inHg
Wind11.6 mph E
Humidity41%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 66°0.11
82 °
Runnells, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.11 in
Chance of precipitation22%
Record high98° (2023)
Record low51° (1966)
Tue, 2583° / 65°0.12
83 °
Runnells, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.12 in
Chance of precipitation32%
Record high97° (2003)
Record low53° (2015)
Wed, 2682° / 66°0.19
82 °
Runnells, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.19 in
Chance of precipitation33%
Record high95° (2013)
Record low50° (2015)
Thu, 2782° / 66°0.17
82 °
Runnells, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.17 in
Chance of precipitation30%
Record high97° (2013)
Record low53° (1971)
Fri, 2882° / 65°0.14
82 °
Runnells, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.14 in
Chance of precipitation35%
Record high96° (1984)
Record low45° (1986)
Sat, 2982° / 65°0.11
82 °
Runnells, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.11 in
Chance of precipitation27%
Record high95° (1984)
Record low50° (1988)
Sun, 3081° / 65°0.16
81 °
Runnells, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.16 in
Chance of precipitation22%
Record high98° (2013)
Record low50° (2009)
Mon, 3181° / 64°0.09
81 °
Runnells, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation25%
Record high94° (2000)
Record low47° (2009)
Tue, 0181° / 64°0.09
81 °
Runnells, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation27%
Record high95° (1984)
Record low47° (1967)
Wed, 0281° / 64°0.11
81 °
Runnells, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high95° (2000)
Record low52° (1974)
Thu, 0380° / 64°0.09
80 °
Runnells, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.09 in
Chance of precipitation23%
Record high95° (2023)
Record low43° (1974)
Fri, 0480° / 63°0.07
80 °
Runnells, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.07 in
Chance of precipitation28%
Record high96° (2012)
Record low45° (1974)
Sat, 0580° / 62°0.08
80 °
Runnells, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.08 in
Chance of precipitation23%
Record high93° (2023)
Record low45° (1962)
Sun, 0680° / 63°0.08
80 °
Runnells, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.08 in
Chance of precipitation23%
Record high93° (2020)
Record low46° (1988)
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 Runnells, 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 Runnells, 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.