As of 17:52 CDT

Weather in Mercer, IA

57°

Mercer, Saturday, 17 October, 17:52

Clear. Feels like 55°. High 58°, low 33°.

Pressure30.36 inHg

Wind9.7 mph S

Humidity45%

Visibility6.2 mi

Dew point36°

See detailed hourly forecast

Monthly outlook for Mercer, IA: average high 65.9°, average low 50.4°. That is 3.7° above the climate normal for October. Precipitation is expected on 6 days (about 2.6 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 24 October (74.8°), the coolest 17 October (32.6°).

65.9°/50.4°

Average high / low

+3.7°

Above normal

6 / 4

Wet days / normal

2.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
17 October – 26 October	66.7°	60.6°	+3.4°
27 October – 5 November	64.6°	55.3°	+5.1°
6 November – 15 November	at normal	50.3°	—

October records over 66 years

92.1°5 October 1963All-time high

10.4°27 October 1997All-time low

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

Sun, 1862° / 42°

62 °

Mercer, Sunday, 18 October

Clear. High 62°, low 42°.

Pressure30.30 inHg

Wind13.9 mph S

Humidity59%

Visibility6.2 mi

Dew point42°

Mon, 1963° / 46°

63 °

Mercer, Monday, 19 October

Overcast. High 63°, low 46°.

Pressure30.33 inHg

Wind9.3 mph S

Humidity64%

Visibility6.2 mi

Dew point47°

Tue, 2066° / 47°

0.03

66 °

Mercer, Tuesday, 20 October

Light rain. High 66°, low 47°.

Pressure30.30 inHg

Wind8.7 mph S

Humidity60%

Visibility6.2 mi

Dew point49°

Wed, 2170° / 50°

70 °

Mercer, Wednesday, 21 October

Clear. High 70°, low 50°.

Pressure30.21 inHg

Wind6.9 mph S

Humidity62%

Visibility6.2 mi

Dew point51°

Thu, 2270° / 51°

70 °

Mercer, Thursday, 22 October

Clear. High 70°, low 51°.

Pressure30.24 inHg

Wind7.8 mph SE

Humidity53%

Visibility—

Dew point49°

Fri, 2374° / 54°

74 °

Mercer, Friday, 23 October

Overcast. High 74°, low 54°.

Pressure30.09 inHg

Wind16 mph S

Humidity50%

Visibility—

Dew point50°

Sat, 2475° / 62°

75 °

Mercer, Saturday, 24 October

Overcast. High 75°, low 62°.

Pressure30.12 inHg

Wind14.9 mph SW

Humidity43%

Visibility—

Dew point47°

Sun, 2568° / 60°

0.31

68 °

Mercer, Sunday, 25 October

Rain. High 68°, low 60°.

Pressure30.12 inHg

Wind14.6 mph W

Humidity67%

Visibility—

Dew point56°

Mon, 2660° / 53°

1.22

60 °

Mercer, Monday, 26 October

Rain. High 60°, low 53°.

Pressure30.12 inHg

Wind12.8 mph NE

Humidity96%

Visibility—

Dew point56°

Tue, 2760° / 44°

60 °

Mercer, Tuesday, 27 October

Clear. High 60°, low 44°.

Pressure30.30 inHg

Wind11.9 mph E

Humidity62%

Visibility—

Dew point43°

Wed, 2860° / 50°

0.47

60 °

Mercer, Wednesday, 28 October

Rain. High 60°, low 50°.

Pressure30.09 inHg

Wind18.3 mph SE

Humidity85%

Visibility—

Dew point47°

Thu, 2971° / 60°

0.19

71 °

Mercer, Thursday, 29 October

Rain. High 71°, low 60°.

Pressure29.80 inHg

Wind18.7 mph S

Humidity71%

Visibility—

Dew point58°

Fri, 3065° / 59°

0.29

65 °

Mercer, Friday, 30 October

Rain. High 65°, low 59°.

Pressure29.65 inHg

Wind15.2 mph S

Humidity91%

Visibility—

Dew point61°

Sat, 3163° / 49°

0.07

63 °

Mercer, Saturday, 31 October

Light rain. High 63°, low 49°.

Pressure29.94 inHg

Wind16 mph NW

Humidity52%

Visibility—

Dew point41°

Sun, 0169° / 48°

0.02

69 °

Mercer, Sunday, 1 November

Light rain. High 69°, low 48°.

Pressure29.91 inHg

Wind16 mph S

Humidity63%

Visibility—

Dew point52°

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

Mon, 0253° / 39°

0.09

53 °

Mercer, Monday, 2 November

Climate normal for this date — 60-year average.

Average high53°

Average low39°

Average precipitation0.09 in

Chance of precipitation28%

Record high76° (1964)

Record low12° (1991)

Tue, 0354° / 39°

0.09

54 °

Mercer, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.09 in

Chance of precipitation20%

Record high74° (1978)

Record low9° (1991)

Wed, 0453° / 38°

0.08

53 °

Mercer, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.08 in

Chance of precipitation17%

Record high71° (1978)

Record low10° (1991)

Thu, 0553° / 38°

0.05

53 °

Mercer, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.05 in

Chance of precipitation22%

Record high73° (2015)

Record low20° (1967)

Fri, 0653° / 37°

0.06

53 °

Mercer, Friday, 6 November

Climate normal for this date — 60-year average.

Average high53°

Average low37°

Average precipitation0.06 in

Chance of precipitation20%

Record high72° (1980)

Record low15° (1991)

Sat, 0753° / 36°

0.02

53 °

Mercer, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high53°

Average low36°

Average precipitation0.02 in

Chance of precipitation8%

Record high72° (1966)

Record low-1° (1991)

Sun, 0853° / 37°

0.04

53 °

Mercer, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high53°

Average low37°

Average precipitation0.04 in

Chance of precipitation20%

Record high75° (1999)

Record low-4° (1991)

Mon, 0953° / 37°

0.11

53 °

Mercer, Monday, 9 November

Climate normal for this date — 60-year average.

Average high53°

Average low37°

Average precipitation0.11 in

Chance of precipitation32%

Record high72° (1999)

Record low19° (1991)

Tue, 1050° / 34°

0.09

50 °

Mercer, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high50°

Average low34°

Average precipitation0.09 in

Chance of precipitation25%

Record high74° (2012)

Record low10° (2018)

Wed, 1148° / 32°

0.07

48 °

Mercer, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high48°

Average low32°

Average precipitation0.07 in

Chance of precipitation20%

Record high73° (1964)

Record low8° (1986)

Thu, 1247° / 32°

0.06

47 °

Mercer, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high47°

Average low32°

Average precipitation0.06 in

Chance of precipitation23%

Record high69° (2005)

Record low2° (1968)

Fri, 1349° / 32°

0.07

49 °

Mercer, Friday, 13 November

Climate normal for this date — 60-year average.

Average high49°

Average low32°

Average precipitation0.07 in

Chance of precipitation20%

Record high76° (1999)

Record low4° (1986)

Sat, 1449° / 34°

0.03

49 °

Mercer, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high49°

Average low34°

Average precipitation0.03 in

Chance of precipitation18%

Record high72° (2025)

Record low12° (2014)

Sun, 1549° / 34°

0.04

49 °

Mercer, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high49°

Average low34°

Average precipitation0.04 in

Chance of precipitation20%

Record high70° (2001)

Record low1° (1972)

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 Mercer, 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 Mercer, 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.