Monthly outlook for Nyman, IA: average high 91.9°, average low 69.4°. That is 5° above the climate normal for August. Precipitation is expected on 5 days (about 1.1 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 22 August (114.6°), the coolest 14 August (63.2°).
91.9°/69.4°
Average high / low
+5°
Above normal
5 / 5
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
85.4°
82.8°
+1.4°
19 August – 28 August
102.7°
83°
+10.9°
29 August – 7 September
at normal
81.2°
—
August records over 66 years
101.7°16 August 1983All-time high
44.4°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Red Oak (9 mi).
Mon, 1090° / 73°0
90 °
Nyman, Monday, 10 August
Light rain. High 90°, low 73°.
Pressure29.85 inHg
Wind9.5 mph E
Humidity53%
Visibility6.2 mi
Dew point66°
Tue, 11100° / 70°0.01
100 °
Nyman, Tuesday, 11 August
Light rain. High 100°, low 70°.
Pressure29.74 inHg
Wind10 mph SW
Humidity39%
Visibility6.2 mi
Dew point64°
Wed, 1288° / 68°0.02
88 °
Nyman, Wednesday, 12 August
Light rain. High 88°, low 68°.
Pressure29.83 inHg
Wind9.7 mph E
Humidity63%
Visibility6.2 mi
Dew point68°
Thu, 1374° / 65°0.42
74 °
Nyman, Thursday, 13 August
Rain. High 74°, low 65°.
Pressure29.94 inHg
Wind20.6 mph E
Humidity89%
Visibility—
Dew point69°
Fri, 1468° / 63°0.29
68 °
Nyman, Friday, 14 August
Light rain. High 68°, low 63°.
Pressure30.06 inHg
Wind19.1 mph E
Humidity94%
Visibility—
Dew point64°
Sat, 1572° / 64°0.14
72 °
Nyman, Saturday, 15 August
Light rain. High 72°, low 64°.
Pressure30.12 inHg
Wind8 mph E
Humidity96%
Visibility—
Dew point65°
Sun, 1684° / 64°0
84 °
Nyman, Sunday, 16 August
Partly cloudy. High 84°, low 64°.
Pressure30.12 inHg
Wind8 mph NE
Humidity63%
Visibility—
Dew point65°
Mon, 1783° / 69°0.03
83 °
Nyman, Monday, 17 August
Light rain. High 83°, low 69°.
Pressure30.06 inHg
Wind10.7 mph SE
Humidity60%
Visibility—
Dew point64°
Tue, 18101° / 68°0
101 °
Nyman, Tuesday, 18 August
Overcast. High 101°, low 68°.
Pressure29.83 inHg
Wind13.8 mph SE
Humidity44%
Visibility—
Dew point64°
Wed, 19111° / 75°0
111 °
Nyman, Wednesday, 19 August
Partly cloudy. High 111°, low 75°.
Pressure29.74 inHg
Wind14.1 mph NE
Humidity31%
Visibility—
Dew point60°
Thu, 20100° / 76°0
100 °
Nyman, Thursday, 20 August
Clear. High 100°, low 76°.
Pressure29.77 inHg
Wind13.7 mph NE
Humidity28%
Visibility—
Dew point56°
Fri, 2190° / 71°0
90 °
Nyman, Friday, 21 August
Overcast. High 90°, low 71°.
Pressure29.91 inHg
Wind15.7 mph E
Humidity41%
Visibility—
Dew point59°
Sat, 22115° / 74°0
115 °
Nyman, Saturday, 22 August
Partly cloudy. High 115°, low 74°.
Pressure29.71 inHg
Wind20.2 mph SW
Humidity15%
Visibility—
Dew point48°
Sun, 23103° / 69°0.07
103 °
Nyman, Sunday, 23 August
Light rain. High 103°, low 69°.
Pressure29.80 inHg
Wind12.8 mph E
Humidity31%
Visibility—
Dew point59°
Mon, 2498° / 68°0.11
98 °
Nyman, Monday, 24 August
Light rain. High 98°, low 68°.
Pressure29.88 inHg
Wind11.4 mph S
Humidity41%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 66°0.12
83 °
Nyman, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.12 in
Chance of precipitation32%
Record high98° (2003)
Record low51° (2015)
Wed, 2683° / 66°0.21
83 °
Nyman, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.21 in
Chance of precipitation37%
Record high96° (1976)
Record low52° (2025)
Thu, 2783° / 66°0.14
83 °
Nyman, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.14 in
Chance of precipitation32%
Record high96° (1984)
Record low52° (1967)
Fri, 2883° / 65°0.15
83 °
Nyman, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.15 in
Chance of precipitation30%
Record high99° (1984)
Record low44° (1986)
Sat, 2983° / 65°0.07
83 °
Nyman, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.07 in
Chance of precipitation17%
Record high96° (1984)
Record low53° (1988)
Sun, 3082° / 65°0.1
82 °
Nyman, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.1 in
Chance of precipitation25%
Record high98° (2013)
Record low50° (2009)
Mon, 3182° / 65°0.13
82 °
Nyman, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.13 in
Chance of precipitation30%
Record high94° (1990)
Record low49° (2009)
Tue, 0181° / 65°0.07
81 °
Nyman, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.07 in
Chance of precipitation23%
Record high96° (1984)
Record low49° (1965)
Wed, 0281° / 64°0.11
81 °
Nyman, 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, 0381° / 64°0.09
81 °
Nyman, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation27%
Record high92° (2000)
Record low42° (1974)
Fri, 0481° / 63°0.13
81 °
Nyman, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.13 in
Chance of precipitation22%
Record high97° (2012)
Record low46° (1974)
Sat, 0580° / 63°0.12
80 °
Nyman, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.12 in
Chance of precipitation25%
Record high93° (1990)
Record low43° (1962)
Sun, 0681° / 63°0.07
81 °
Nyman, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.07 in
Chance of precipitation20%
Record high96° (1970)
Record low47° (2025)
Mon, 0780° / 62°0.17
80 °
Nyman, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.17 in
Chance of precipitation32%
Record high94° (2013)
Record low46° (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 Nyman, 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 Nyman, 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.