As of 13:36 CDT

Weather in Marathon, IA

72°

Marathon, Thursday, 8 October, 13:36

Overcast. Feels like 71°. High 72°, low 46°.

Pressure30.09 inHg

Wind5.2 mph SE

Humidity37%

Visibility6.2 mi

Dew point45°

See detailed hourly forecast

Monthly outlook for Marathon, IA: average high 66.7°, average low 50.7°. That is 3.8° above the climate normal for October. Precipitation is expected on 4 days (about 1.7 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 10 October (81.1°), the coolest 23 October (40.3°).

66.7°/50.7°

Average high / low

+3.8°

Above normal

4 / 4

Wet days / normal

1.7 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	69.7°	61.1°	+4.8°
18 October – 27 October	61.6°	57°	+2.5°
28 October – 6 November	at normal	51.6°	—

October records over 66 years

89.1°3 October 2025All-time high

14.2°27 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Webb (6 mi).

Fri, 0978° / 52°

0.3

78 °

Marathon, Friday, 9 October

Rain. High 78°, low 52°.

Pressure29.94 inHg

Wind7.7 mph SE

Humidity69%

Visibility6.2 mi

Dew point58°

Sat, 1081° / 62°

81 °

Marathon, Saturday, 10 October

Clear. High 81°, low 62°.

Pressure29.83 inHg

Wind15.9 mph S

Humidity54%

Visibility6.2 mi

Dew point58°

Sun, 1181° / 61°

81 °

Marathon, Sunday, 11 October

Partly cloudy. High 81°, low 61°.

Pressure29.83 inHg

Wind11.8 mph S

Humidity55%

Visibility6.2 mi

Dew point59°

Mon, 1274° / 61°

74 °

Marathon, Monday, 12 October

Overcast. High 74°, low 61°.

Pressure29.80 inHg

Wind4.9 mph NE

Humidity67%

Visibility6.2 mi

Dew point57°

Tue, 1365° / 56°

65 °

Marathon, Tuesday, 13 October

Overcast. High 65°, low 56°.

Pressure30.00 inHg

Wind10 mph N

Humidity60%

Visibility—

Dew point49°

Wed, 1469° / 55°

0.68

69 °

Marathon, Wednesday, 14 October

Heavy rain. High 69°, low 55°.

Pressure29.74 inHg

Wind16 mph SE

Humidity97%

Visibility—

Dew point56°

Thu, 1572° / 57°

0.02

72 °

Marathon, Thursday, 15 October

Light rain. High 72°, low 57°.

Pressure29.68 inHg

Wind23.1 mph S

Humidity42%

Visibility—

Dew point48°

Fri, 1653° / 45°

53 °

Marathon, Friday, 16 October

Overcast. High 53°, low 45°.

Pressure30.47 inHg

Wind16.5 mph NW

Humidity64%

Visibility—

Dew point36°

Sat, 1753° / 42°

53 °

Marathon, Saturday, 17 October

Overcast. High 53°, low 42°.

Pressure30.68 inHg

Wind11.2 mph N

Humidity51%

Visibility—

Dew point32°

Sun, 1858° / 43°

58 °

Marathon, Sunday, 18 October

Overcast. High 58°, low 43°.

Pressure30.36 inHg

Wind13 mph SE

Humidity68%

Visibility—

Dew point38°

Mon, 1965° / 48°

0.65

65 °

Marathon, Monday, 19 October

Rain. High 65°, low 48°.

Pressure29.97 inHg

Wind15.1 mph SW

Humidity72%

Visibility—

Dew point51°

Tue, 2067° / 49°

67 °

Marathon, Tuesday, 20 October

Clear. High 67°, low 49°.

Pressure30.09 inHg

Wind14.6 mph W

Humidity36%

Visibility—

Dew point36°

Wed, 2167° / 49°

67 °

Marathon, Wednesday, 21 October

Clear. High 67°, low 49°.

Pressure30.06 inHg

Wind10.1 mph SW

Humidity34%

Visibility—

Dew point34°

Thu, 2255° / 45°

0.04

55 °

Marathon, Thursday, 22 October

Light rain. High 55°, low 45°.

Pressure29.97 inHg

Wind23.4 mph W

Humidity73%

Visibility—

Dew point40°

Fri, 2358° / 40°

58 °

Marathon, Friday, 23 October

Overcast. High 58°, low 40°.

Pressure29.97 inHg

Wind20.3 mph SE

Humidity48%

Visibility—

Dew point33°

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

Sat, 2456° / 40°

0.07

56 °

Marathon, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high56°

Average low40°

Average precipitation0.07 in

Chance of precipitation30%

Record high75° (1989)

Record low20° (2020)

Sun, 2556° / 39°

0.04

56 °

Marathon, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high56°

Average low39°

Average precipitation0.04 in

Chance of precipitation20%

Record high76° (1989)

Record low25° (2020)

Mon, 2656° / 39°

0.06

56 °

Marathon, Monday, 26 October

Climate normal for this date — 60-year average.

Average high56°

Average low39°

Average precipitation0.06 in

Chance of precipitation17%

Record high76° (1989)

Record low19° (2020)

Tue, 2755° / 39°

0.09

55 °

Marathon, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high55°

Average low39°

Average precipitation0.09 in

Chance of precipitation28%

Record high77° (1999)

Record low14° (2020)

Wed, 2854° / 38°

0.05

54 °

Marathon, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high54°

Average low38°

Average precipitation0.05 in

Chance of precipitation17%

Record high76° (2016)

Record low19° (1967)

Thu, 2955° / 38°

0.08

55 °

Marathon, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high55°

Average low38°

Average precipitation0.08 in

Chance of precipitation28%

Record high79° (2024)

Record low23° (1980)

Fri, 3054° / 38°

0.07

54 °

Marathon, Friday, 30 October

Climate normal for this date — 60-year average.

Average high54°

Average low38°

Average precipitation0.07 in

Chance of precipitation32%

Record high73° (2024)

Record low20° (1991)

Sat, 3152° / 37°

0.1

52 °

Marathon, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high52°

Average low37°

Average precipitation0.1 in

Chance of precipitation28%

Record high73° (1968)

Record low18° (1993)

Sun, 0151° / 36°

0.08

51 °

Marathon, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high51°

Average low36°

Average precipitation0.08 in

Chance of precipitation22%

Record high73° (2022)

Record low20° (2002)

Mon, 0251° / 36°

0.04

51 °

Marathon, Monday, 2 November

Climate normal for this date — 60-year average.

Average high51°

Average low36°

Average precipitation0.04 in

Chance of precipitation18%

Record high74° (2022)

Record low11° (1991)

Tue, 0350° / 35°

0.06

50 °

Marathon, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high50°

Average low35°

Average precipitation0.06 in

Chance of precipitation18%

Record high73° (1978)

Record low4° (1991)

Wed, 0450° / 34°

0.03

50 °

Marathon, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high50°

Average low34°

Average precipitation0.03 in

Chance of precipitation20%

Record high70° (2020)

Record low-12° (1991)

Thu, 0550° / 34°

0.06

50 °

Marathon, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high50°

Average low34°

Average precipitation0.06 in

Chance of precipitation22%

Record high69° (2020)

Record low15° (1991)

Fri, 0650° / 35°

0.04

50 °

Marathon, Friday, 6 November

Climate normal for this date — 60-year average.

Average high50°

Average low35°

Average precipitation0.04 in

Chance of precipitation23%

Record high71° (2020)

Record low4° (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 Marathon, 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 Marathon, 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.