As of 16:57 CDT

Weather in Coster, IA

76°

Coster, Wednesday, 7 October, 16:57

Overcast. Feels like 75°. High 76°, low 53°.

Pressure29.94 inHg

Wind7.3 mph NW

Humidity34%

Visibility6.2 mi

Dew point46°

See detailed hourly forecast

Monthly outlook for Coster, IA: average high 66.4°, average low 50.1°. That is 3° above the climate normal for October. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 10 October (80.6°), the coolest 17 October (37.9°).

66.4°/50.1°

Average high / low

+3°

Above normal

3 / 4

Wet days / normal

0.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
7 October – 16 October	72.2°	62.2°	+5.6°
17 October – 26 October	56.6°	58.1°	-0.8°
27 October – 5 November	at normal	53.3°	—

October records over 66 years

88.5°1 October 2023All-time high

20.3°19 October 1972All-time low

Climate normals and records are computed from the nearest reference point — New Hartford (8 mi).

Thu, 0872° / 49°

72 °

Coster, Thursday, 8 October

Mostly clear. High 72°, low 49°.

Pressure30.12 inHg

Wind0.3 mph N

Humidity49%

Visibility6.2 mi

Dew point45°

Fri, 0976° / 50°

0.24

76 °

Coster, Friday, 9 October

Rain. High 76°, low 50°.

Pressure30.03 inHg

Wind8.4 mph SE

Humidity80%

Visibility6.2 mi

Dew point57°

Sat, 1081° / 64°

81 °

Coster, Saturday, 10 October

Clear. High 81°, low 64°.

Pressure29.94 inHg

Wind14.8 mph S

Humidity57%

Visibility6.2 mi

Dew point60°

Sun, 1177° / 58°

77 °

Coster, Sunday, 11 October

Clear. High 77°, low 58°.

Pressure29.91 inHg

Wind11.4 mph S

Humidity49%

Visibility6.2 mi

Dew point53°

Mon, 1278° / 60°

78 °

Coster, Monday, 12 October

Partly cloudy. High 78°, low 60°.

Pressure29.74 inHg

Wind13.1 mph NW

Humidity63%

Visibility—

Dew point59°

Tue, 1360° / 51°

60 °

Coster, Tuesday, 13 October

Partly cloudy. High 60°, low 51°.

Pressure30.06 inHg

Wind14.1 mph N

Humidity55%

Visibility—

Dew point42°

Wed, 1469° / 53°

0.33

69 °

Coster, Wednesday, 14 October

Light rain. High 69°, low 53°.

Pressure29.80 inHg

Wind18.4 mph SE

Humidity84%

Visibility—

Dew point56°

Thu, 1578° / 54°

0.03

78 °

Coster, Thursday, 15 October

Light rain. High 78°, low 54°.

Pressure29.59 inHg

Wind23.6 mph NW

Humidity41%

Visibility—

Dew point51°

Fri, 1656° / 44°

56 °

Coster, Friday, 16 October

Clear. High 56°, low 44°.

Pressure30.42 inHg

Wind17.1 mph NW

Humidity48%

Visibility—

Dew point35°

Sat, 1753° / 38°

53 °

Coster, Saturday, 17 October

Clear. High 53°, low 38°.

Pressure30.45 inHg

Wind11.5 mph N

Humidity47%

Visibility—

Dew point29°

Sun, 1856° / 38°

56 °

Coster, Sunday, 18 October

Mostly clear. High 56°, low 38°.

Pressure30.39 inHg

Wind9.1 mph SE

Humidity44%

Visibility—

Dew point31°

Mon, 1950° / 45°

0.34

50 °

Coster, Monday, 19 October

Rain. High 50°, low 45°.

Pressure30.30 inHg

Wind17.9 mph S

Humidity76%

Visibility—

Dew point39°

Tue, 2065° / 47°

65 °

Coster, Tuesday, 20 October

Clear. High 65°, low 47°.

Pressure30.18 inHg

Wind13.7 mph S

Humidity64%

Visibility—

Dew point50°

Wed, 2161° / 47°

61 °

Coster, Wednesday, 21 October

Overcast. High 61°, low 47°.

Pressure30.18 inHg

Wind6.5 mph N

Humidity55%

Visibility—

Dew point42°

Thu, 2255° / 49°

55 °

Coster, Thursday, 22 October

Overcast. High 55°, low 49°.

Pressure29.88 inHg

Wind10.8 mph N

Humidity65%

Visibility—

Dew point43°

From day 17 onward the outlook is built from 60-year climate statistics

Fri, 2358° / 44°

0.11

58 °

Coster, Friday, 23 October

Climate normal for this date — 60-year average.

Average high58°

Average low44°

Average precipitation0.11 in

Chance of precipitation43%

Record high79° (1963)

Record low24° (1981)

Sat, 2457° / 41°

0.11

57 °

Coster, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high57°

Average low41°

Average precipitation0.11 in

Chance of precipitation28%

Record high76° (2023)

Record low23° (2020)

Sun, 2556° / 40°

0.05

56 °

Coster, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high56°

Average low40°

Average precipitation0.05 in

Chance of precipitation23%

Record high77° (1989)

Record low26° (2019)

Mon, 2656° / 40°

0.07

56 °

Coster, Monday, 26 October

Climate normal for this date — 60-year average.

Average high56°

Average low40°

Average precipitation0.07 in

Chance of precipitation22%

Record high74° (1989)

Record low23° (1962)

Tue, 2756° / 40°

0.09

56 °

Coster, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high56°

Average low40°

Average precipitation0.09 in

Chance of precipitation25%

Record high73° (1966)

Record low21° (2020)

Wed, 2854° / 39°

0.07

54 °

Coster, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.07 in

Chance of precipitation23%

Record high75° (2016)

Record low21° (1967)

Thu, 2955° / 39°

0.08

55 °

Coster, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high55°

Average low39°

Average precipitation0.08 in

Chance of precipitation30%

Record high81° (2024)

Record low22° (1980)

Fri, 3056° / 40°

0.07

56 °

Coster, Friday, 30 October

Climate normal for this date — 60-year average.

Average high56°

Average low40°

Average precipitation0.07 in

Chance of precipitation27%

Record high77° (2024)

Record low21° (1988)

Sat, 3154° / 39°

0.11

54 °

Coster, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.11 in

Chance of precipitation30%

Record high74° (1968)

Record low22° (1993)

Sun, 0153° / 38°

0.17

53 °

Coster, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.17 in

Chance of precipitation33%

Record high74° (2000)

Record low22° (2002)

Mon, 0252° / 37°

0.07

52 °

Coster, Monday, 2 November

Climate normal for this date — 60-year average.

Average high52°

Average low37°

Average precipitation0.07 in

Chance of precipitation28%

Record high73° (2022)

Record low15° (1991)

Tue, 0352° / 37°

0.06

52 °

Coster, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high52°

Average low37°

Average precipitation0.06 in

Chance of precipitation23%

Record high72° (2008)

Record low13° (1991)

Wed, 0451° / 37°

0.08

51 °

Coster, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high51°

Average low37°

Average precipitation0.08 in

Chance of precipitation22%

Record high71° (2008)

Record low9° (1991)

Thu, 0551° / 35°

0.06

51 °

Coster, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high51°

Average low35°

Average precipitation0.06 in

Chance of precipitation28%

Record high69° (2015)

Record low19° (1991)

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 Coster, 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 Coster, 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.