Monthly outlook for Bristol, IA: average high 79.6°, average low 59.7°. That is 0.8° above the climate normal for August. Precipitation is expected on 6 days (about 0.8 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 18 August (95.5°), the coolest 21 August (50.5°).
79.6°/59.7°
Average high / low
+0.8°
Above normal
6 / 5
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
79°
78.2°
+0.4°
18 August – 27 August
80.6°
78.1°
+1.4°
28 August – 6 September
at normal
76.9°
—
August records over 66 years
99.3°16 August 1988All-time high
41.9°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Forest City (14 mi).
Sun, 0979° / 65°0.12
79 °
Bristol, Sunday, 9 August
Rain. High 79°, low 65°.
Pressure29.83 inHg
Wind12.2 mph SE
Humidity86%
Visibility6.2 mi
Dew point69°
Mon, 1084° / 67°0.17
84 °
Bristol, Monday, 10 August
Rain. High 84°, low 67°.
Pressure29.88 inHg
Wind11.7 mph E
Humidity74%
Visibility6.2 mi
Dew point71°
Tue, 1182° / 65°0.1
82 °
Bristol, Tuesday, 11 August
Rain. High 82°, low 65°.
Pressure29.83 inHg
Wind8.6 mph NE
Humidity65%
Visibility6.2 mi
Dew point66°
Wed, 1281° / 65°0
81 °
Bristol, Wednesday, 12 August
Overcast. High 81°, low 65°.
Pressure29.94 inHg
Wind9.2 mph NE
Humidity48%
Visibility6.2 mi
Dew point59°
Thu, 1374° / 61°0
74 °
Bristol, Thursday, 13 August
Overcast. High 74°, low 61°.
Pressure30.03 inHg
Wind8.4 mph E
Humidity62%
Visibility—
Dew point54°
Fri, 1478° / 57°0
78 °
Bristol, Friday, 14 August
Overcast. High 78°, low 57°.
Pressure30.12 inHg
Wind6.5 mph E
Humidity50%
Visibility—
Dew point54°
Sat, 1572° / 57°0
72 °
Bristol, Saturday, 15 August
Overcast. High 72°, low 57°.
Pressure30.24 inHg
Wind15.7 mph SE
Humidity54%
Visibility—
Dew point53°
Sun, 1676° / 57°0
76 °
Bristol, Sunday, 16 August
Overcast. High 76°, low 57°.
Pressure30.12 inHg
Wind8.3 mph SE
Humidity66%
Visibility—
Dew point60°
Mon, 1786° / 63°0
86 °
Bristol, Monday, 17 August
Mostly clear. High 86°, low 63°.
Pressure30.00 inHg
Wind10.4 mph SE
Humidity46%
Visibility—
Dew point60°
Tue, 1896° / 68°0.09
96 °
Bristol, Tuesday, 18 August
Light rain. High 96°, low 68°.
Pressure29.88 inHg
Wind15.9 mph SW
Humidity33%
Visibility—
Dew point56°
Wed, 1977° / 58°0.06
77 °
Bristol, Wednesday, 19 August
Light rain. High 77°, low 58°.
Pressure30.06 inHg
Wind15.3 mph N
Humidity47%
Visibility—
Dew point50°
Thu, 2065° / 54°0.03
65 °
Bristol, Thursday, 20 August
Light rain. High 65°, low 54°.
Pressure30.18 inHg
Wind6.7 mph SE
Humidity89%
Visibility—
Dew point55°
Fri, 2176° / 50°0
76 °
Bristol, Friday, 21 August
Partly cloudy. High 76°, low 50°.
Pressure30.03 inHg
Wind14.6 mph SE
Humidity43%
Visibility—
Dew point47°
Sat, 2287° / 56°0.17
87 °
Bristol, Saturday, 22 August
Light rain. High 87°, low 56°.
Pressure29.80 inHg
Wind15.7 mph NW
Humidity56%
Visibility—
Dew point57°
Sun, 2383° / 56°0
83 °
Bristol, Sunday, 23 August
Clear. High 83°, low 56°.
Pressure29.94 inHg
Wind12.9 mph NW
Humidity35%
Visibility—
Dew point47°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2478° / 63°0.14
78 °
Bristol, Monday, 24 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.14 in
Chance of precipitation28%
Record high93° (2020)
Record low50° (1966)
Tue, 2578° / 63°0.13
78 °
Bristol, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.13 in
Chance of precipitation30%
Record high93° (2020)
Record low49° (1979)
Wed, 2678° / 63°0.09
78 °
Bristol, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.09 in
Chance of precipitation30%
Record high92° (2020)
Record low48° (2025)
Thu, 2778° / 63°0.15
78 °
Bristol, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.15 in
Chance of precipitation37%
Record high91° (2013)
Record low49° (1971)
Fri, 2878° / 62°0.21
78 °
Bristol, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.21 in
Chance of precipitation35%
Record high91° (1984)
Record low42° (1986)
Sat, 2978° / 62°0.07
78 °
Bristol, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.07 in
Chance of precipitation30%
Record high94° (2012)
Record low47° (1988)
Sun, 3077° / 61°0.11
77 °
Bristol, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.11 in
Chance of precipitation32%
Record high96° (2012)
Record low48° (2009)
Mon, 3177° / 60°0.11
77 °
Bristol, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.11 in
Chance of precipitation30%
Record high88° (2012)
Record low46° (1967)
Tue, 0177° / 60°0.09
77 °
Bristol, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.09 in
Chance of precipitation32%
Record high91° (2011)
Record low43° (1974)
Wed, 0277° / 61°0.12
77 °
Bristol, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.12 in
Chance of precipitation40%
Record high93° (2023)
Record low46° (1968)
Thu, 0376° / 60°0.08
76 °
Bristol, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.08 in
Chance of precipitation25%
Record high93° (2023)
Record low39° (1974)
Fri, 0476° / 59°0.1
76 °
Bristol, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low59°
Average precipitation0.1 in
Chance of precipitation22%
Record high93° (2023)
Record low44° (2025)
Sat, 0576° / 59°0.12
76 °
Bristol, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low59°
Average precipitation0.12 in
Chance of precipitation30%
Record high91° (2023)
Record low41° (1962)
Sun, 0676° / 59°0.07
76 °
Bristol, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low59°
Average precipitation0.07 in
Chance of precipitation23%
Record high90° (2020)
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 Bristol, 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 Bristol, 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.