Monthly outlook for Last Chance, IA: average high 80.6°, average low 64.9°. That is 0.9° below the climate normal for August. Precipitation is expected on 4 days (about 1.6 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 11 August (94.1°), the coolest 21 August (52.1°).
80.6°/64.9°
Average high / low
−0.9°
Below normal
4 / 5
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
82.7°
82.2°
+0.3°
19 August – 28 August
77.3°
82.4°
-2.8°
29 August – 7 September
at normal
80.3°
—
August records over 66 years
100.9°16 August 1983All-time high
44.4°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Osceola (13 mi).
Mon, 1089° / 74°0
89 °
Last Chance, Monday, 10 August
Overcast. High 89°, low 74°.
Pressure29.85 inHg
Wind9.1 mph SW
Humidity59%
Visibility6.2 mi
Dew point70°
Tue, 1194° / 74°0
94 °
Last Chance, Tuesday, 11 August
Mostly clear. High 94°, low 74°.
Pressure29.77 inHg
Wind9.6 mph W
Humidity54%
Visibility6.2 mi
Dew point70°
Wed, 1284° / 66°0.11
84 °
Last Chance, Wednesday, 12 August
Light rain. High 84°, low 66°.
Pressure29.85 inHg
Wind10.3 mph E
Humidity75%
Visibility6.2 mi
Dew point70°
Thu, 1372° / 64°1.19
72 °
Last Chance, Thursday, 13 August
Heavy rain. High 72°, low 64°.
Pressure29.91 inHg
Wind17.4 mph NE
Humidity96%
Visibility—
Dew point69°
Fri, 1478° / 61°0.02
78 °
Last Chance, Friday, 14 August
Light rain. High 78°, low 61°.
Pressure30.09 inHg
Wind13.3 mph E
Humidity71%
Visibility—
Dew point63°
Sat, 1568° / 64°0.13
68 °
Last Chance, Saturday, 15 August
Light rain. High 68°, low 64°.
Pressure30.15 inHg
Wind14.2 mph E
Humidity96%
Visibility—
Dew point64°
Sun, 1677° / 63°0
77 °
Last Chance, Sunday, 16 August
Overcast. High 77°, low 63°.
Pressure30.12 inHg
Wind5.9 mph NE
Humidity79%
Visibility—
Dew point66°
Mon, 1783° / 68°0.06
83 °
Last Chance, Monday, 17 August
Light rain. High 83°, low 68°.
Pressure30.03 inHg
Wind6.8 mph S
Humidity67%
Visibility—
Dew point67°
Tue, 1887° / 68°0
87 °
Last Chance, Tuesday, 18 August
Overcast. High 87°, low 68°.
Pressure29.97 inHg
Wind11.8 mph S
Humidity70%
Visibility—
Dew point71°
Wed, 1974° / 64°0.01
74 °
Last Chance, Wednesday, 19 August
Light rain. High 74°, low 64°.
Pressure30.00 inHg
Wind13 mph N
Humidity70%
Visibility—
Dew point62°
Thu, 2071° / 55°0.02
71 °
Last Chance, Thursday, 20 August
Light rain. High 71°, low 55°.
Pressure30.09 inHg
Wind15.9 mph NE
Humidity56%
Visibility—
Dew point53°
Fri, 2165° / 52°0
65 °
Last Chance, Friday, 21 August
Overcast. High 65°, low 52°.
Pressure30.03 inHg
Wind12.8 mph E
Humidity66%
Visibility—
Dew point52°
Sat, 2284° / 59°0
84 °
Last Chance, Saturday, 22 August
Overcast. High 84°, low 59°.
Pressure29.85 inHg
Wind11.1 mph W
Humidity66%
Visibility—
Dew point65°
Sun, 2386° / 65°0
86 °
Last Chance, Sunday, 23 August
Mostly clear. High 86°, low 65°.
Pressure29.94 inHg
Wind9 mph SW
Humidity52%
Visibility—
Dew point61°
Mon, 2484° / 68°0
84 °
Last Chance, Monday, 24 August
Overcast. High 84°, low 68°.
Pressure29.91 inHg
Wind10.6 mph S
Humidity66%
Visibility—
Dew point69°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 65°0.17
83 °
Last Chance, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.17 in
Chance of precipitation33%
Record high100° (2003)
Record low52° (2015)
Wed, 2683° / 66°0.17
83 °
Last Chance, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.17 in
Chance of precipitation28%
Record high96° (1983)
Record low53° (2015)
Thu, 2782° / 66°0.15
82 °
Last Chance, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.15 in
Chance of precipitation32%
Record high96° (2013)
Record low53° (1967)
Fri, 2882° / 64°0.13
82 °
Last Chance, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.13 in
Chance of precipitation35%
Record high98° (1984)
Record low44° (1986)
Sat, 2982° / 65°0.08
82 °
Last Chance, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.08 in
Chance of precipitation23%
Record high97° (1984)
Record low50° (1988)
Sun, 3081° / 64°0.13
81 °
Last Chance, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.13 in
Chance of precipitation30%
Record high99° (2013)
Record low49° (2009)
Mon, 3181° / 64°0.09
81 °
Last Chance, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation25%
Record high92° (2000)
Record low47° (2009)
Tue, 0180° / 64°0.11
80 °
Last Chance, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high95° (1984)
Record low46° (1967)
Wed, 0281° / 64°0.09
81 °
Last Chance, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation28%
Record high93° (2000)
Record low52° (1974)
Thu, 0380° / 64°0.09
80 °
Last Chance, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.09 in
Chance of precipitation27%
Record high91° (1999)
Record low43° (1974)
Fri, 0480° / 62°0.08
80 °
Last Chance, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.08 in
Chance of precipitation22%
Record high95° (2012)
Record low43° (1974)
Sat, 0580° / 62°0.09
80 °
Last Chance, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.09 in
Chance of precipitation20%
Record high92° (2012)
Record low44° (1962)
Sun, 0680° / 62°0.07
80 °
Last Chance, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.07 in
Chance of precipitation25%
Record high93° (1970)
Record low46° (1988)
Mon, 0779° / 62°0.19
79 °
Last Chance, Monday, 7 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.19 in
Chance of precipitation32%
Record high96° (2013)
Record low46° (1986)
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 Last Chance, 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 Last Chance, 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.