Monthly outlook for Gilliatt, IA: average high 86.5°, average low 66°. That is 1.7° above the climate normal for August. Precipitation is expected on 4 days (about 1.9 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 9 August (100°), the coolest 23 August (54.4°).
86.5°/66°
Average high / low
+1.7°
Above normal
4 / 5
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
87.2°
83.4°
+2.1°
18 August – 27 August
85.3°
83.6°
+1°
28 August – 6 September
at normal
82.1°
—
August records over 66 years
102.6°16 August 1983All-time high
48.4°23 August 1966All-time low
Climate normals and records are computed from the nearest reference point — Omaha (15 mi).
Sun, 09100° / 75°0.01
100 °
Gilliatt, Sunday, 9 August
Light rain. High 100°, low 75°.
Pressure29.74 inHg
Wind11.2 mph SW
Humidity43%
Visibility6.2 mi
Dew point65°
Mon, 1092° / 73°0.01
92 °
Gilliatt, Monday, 10 August
Light rain. High 92°, low 73°.
Pressure29.80 inHg
Wind10.3 mph E
Humidity53%
Visibility6.2 mi
Dew point65°
Tue, 1195° / 69°0
95 °
Gilliatt, Tuesday, 11 August
Partly cloudy. High 95°, low 69°.
Pressure29.77 inHg
Wind3.9 mph NW
Humidity46%
Visibility6.2 mi
Dew point65°
Wed, 1292° / 68°0.01
92 °
Gilliatt, Wednesday, 12 August
Light rain. High 92°, low 68°.
Pressure29.83 inHg
Wind10.8 mph SE
Humidity52%
Visibility6.2 mi
Dew point67°
Thu, 1378° / 67°1.41
78 °
Gilliatt, Thursday, 13 August
Heavy rain. High 78°, low 67°.
Pressure29.94 inHg
Wind14.4 mph NE
Humidity82%
Visibility—
Dew point68°
Fri, 1478° / 59°0
78 °
Gilliatt, Friday, 14 August
Overcast. High 78°, low 59°.
Pressure30.18 inHg
Wind9.5 mph E
Humidity47%
Visibility—
Dew point52°
Sat, 1577° / 58°0.07
77 °
Gilliatt, Saturday, 15 August
Light rain. High 77°, low 58°.
Pressure30.15 inHg
Wind14.4 mph SE
Humidity68%
Visibility—
Dew point62°
Sun, 1686° / 67°0.02
86 °
Gilliatt, Sunday, 16 August
Light rain. High 86°, low 67°.
Pressure30.00 inHg
Wind11.4 mph SE
Humidity76%
Visibility—
Dew point70°
Mon, 1793° / 71°0.09
93 °
Gilliatt, Monday, 17 August
Light rain. High 93°, low 71°.
Pressure29.97 inHg
Wind15.8 mph W
Humidity55%
Visibility—
Dew point70°
Tue, 1887° / 66°0.02
87 °
Gilliatt, Tuesday, 18 August
Light rain. High 87°, low 66°.
Pressure30.00 inHg
Wind8.6 mph S
Humidity62%
Visibility—
Dew point67°
Wed, 1990° / 70°0.04
90 °
Gilliatt, Wednesday, 19 August
Light rain. High 90°, low 70°.
Pressure29.85 inHg
Wind18.3 mph E
Humidity52%
Visibility—
Dew point67°
Thu, 2082° / 64°0.17
82 °
Gilliatt, Thursday, 20 August
Light rain. High 82°, low 64°.
Pressure29.97 inHg
Wind11.7 mph E
Humidity58%
Visibility—
Dew point61°
Fri, 2186° / 65°0
86 °
Gilliatt, Friday, 21 August
Partly cloudy. High 86°, low 65°.
Pressure29.97 inHg
Wind8.5 mph SE
Humidity51%
Visibility—
Dew point62°
Sat, 2290° / 67°0.03
90 °
Gilliatt, Saturday, 22 August
Light rain. High 90°, low 67°.
Pressure29.88 inHg
Wind13.9 mph NE
Humidity49%
Visibility—
Dew point64°
Sun, 2377° / 54°0
77 °
Gilliatt, Sunday, 23 August
Clear. High 77°, low 54°.
Pressure30.18 inHg
Wind11.7 mph E
Humidity46%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2484° / 67°0.06
84 °
Gilliatt, Monday, 24 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.06 in
Chance of precipitation27%
Record high99° (2023)
Record low51° (2015)
Tue, 2583° / 66°0.14
83 °
Gilliatt, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.14 in
Chance of precipitation28%
Record high99° (2003)
Record low52° (2015)
Wed, 2684° / 67°0.22
84 °
Gilliatt, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.22 in
Chance of precipitation33%
Record high98° (1976)
Record low55° (1964)
Thu, 2783° / 66°0.1
83 °
Gilliatt, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.1 in
Chance of precipitation28%
Record high97° (2013)
Record low51° (1967)
Fri, 2883° / 65°0.11
83 °
Gilliatt, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.11 in
Chance of precipitation25%
Record high99° (1984)
Record low48° (1986)
Sat, 2983° / 65°0.09
83 °
Gilliatt, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.09 in
Chance of precipitation25%
Record high96° (1970)
Record low54° (2004)
Sun, 3082° / 65°0.08
82 °
Gilliatt, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.08 in
Chance of precipitation25%
Record high97° (2000)
Record low50° (2009)
Mon, 3182° / 65°0.09
82 °
Gilliatt, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation30%
Record high97° (1990)
Record low49° (2009)
Tue, 0182° / 65°0.08
82 °
Gilliatt, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.08 in
Chance of precipitation25%
Record high95° (2011)
Record low48° (1965)
Wed, 0282° / 64°0.08
82 °
Gilliatt, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.08 in
Chance of precipitation30%
Record high98° (2000)
Record low50° (1974)
Thu, 0381° / 64°0.08
81 °
Gilliatt, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.08 in
Chance of precipitation28%
Record high94° (2000)
Record low42° (1974)
Fri, 0481° / 64°0.12
81 °
Gilliatt, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.12 in
Chance of precipitation27%
Record high98° (2012)
Record low45° (1974)
Sat, 0581° / 63°0.11
81 °
Gilliatt, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.11 in
Chance of precipitation25%
Record high95° (1990)
Record low47° (1962)
Sun, 0682° / 63°0.06
82 °
Gilliatt, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low63°
Average precipitation0.06 in
Chance of precipitation27%
Record high98° (1970)
Record low47° (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 Gilliatt, 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 Gilliatt, 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.