As of 04:34 CDT

Weather in Mercer, IA

54°

Mercer, Thursday, 22 October, 04:34

Clear. Feels like 53°. High 77°, low 54°.

Pressure30.21 inHg

Wind4.9 mph S

Humidity83%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

Monthly outlook for Mercer, IA: average high 64.3°, average low 49°. That is 4.3° above the climate normal for October. Precipitation is expected on 3 days (about 1.7 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 22 October (77.1°), the coolest 5 November (36°).

64.3°/49°

Average high / low

+4.3°

Above normal

3 / 4

Wet days / normal

1.7 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
22 October – 31 October	69.3°	58.3°	+6.1°
1 November – 10 November	56.1°	53°	+1.7°
11 November – 20 November	at normal	48.5°	—

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).

Fri, 2377° / 56°

77 °

Mercer, Friday, 23 October

Mostly clear. High 77°, low 56°.

Pressure30.15 inHg

Wind11.5 mph SE

Humidity53%

Visibility6.2 mi

Dew point52°

Sat, 2475° / 59°

75 °

Mercer, Saturday, 24 October

Partly cloudy. High 75°, low 59°.

Pressure30.21 inHg

Wind11.1 mph S

Humidity49%

Visibility6.2 mi

Dew point51°

Sun, 2575° / 56°

75 °

Mercer, Sunday, 25 October

Partly cloudy. High 75°, low 56°.

Pressure30.33 inHg

Wind4.5 mph SW

Humidity61%

Visibility6.2 mi

Dew point56°

Mon, 2673° / 58°

73 °

Mercer, Monday, 26 October

Overcast. High 73°, low 58°.

Pressure30.27 inHg

Wind8.6 mph SE

Humidity54%

Visibility—

Dew point51°

Tue, 2769° / 55°

0.11

69 °

Mercer, Tuesday, 27 October

Light rain. High 69°, low 55°.

Pressure30.18 inHg

Wind12 mph S

Humidity57%

Visibility—

Dew point48°

Wed, 2861° / 42°

61 °

Mercer, Wednesday, 28 October

Mostly clear. High 61°, low 42°.

Pressure30.18 inHg

Wind7.1 mph W

Humidity61%

Visibility—

Dew point43°

Thu, 2961° / 52°

1.55

61 °

Mercer, Thursday, 29 October

Heavy rain. High 61°, low 52°.

Pressure29.97 inHg

Wind11.2 mph SE

Humidity95%

Visibility—

Dew point55°

Fri, 3062° / 56°

0.05

62 °

Mercer, Friday, 30 October

Light rain. High 62°, low 56°.

Pressure29.77 inHg

Wind8.6 mph SE

Humidity88%

Visibility—

Dew point57°

Sat, 3163° / 51°

63 °

Mercer, Saturday, 31 October

Overcast. High 63°, low 51°.

Pressure29.80 inHg

Wind7.8 mph NE

Humidity59%

Visibility—

Dew point46°

Sun, 0163° / 48°

63 °

Mercer, Sunday, 1 November

Clear. High 63°, low 48°.

Pressure30.00 inHg

Wind9.7 mph NW

Humidity43%

Visibility—

Dew point38°

Mon, 0257° / 43°

57 °

Mercer, Monday, 2 November

Partly cloudy. High 57°, low 43°.

Pressure30.27 inHg

Wind11.1 mph NE

Humidity52%

Visibility—

Dew point37°

Tue, 0354° / 38°

54 °

Mercer, Tuesday, 3 November

Mostly clear. High 54°, low 38°.

Pressure30.39 inHg

Wind7.4 mph E

Humidity49%

Visibility—

Dew point32°

Wed, 0453° / 38°

53 °

Mercer, Wednesday, 4 November

Overcast. High 53°, low 38°.

Pressure30.42 inHg

Wind10 mph E

Humidity50%

Visibility—

Dew point31°

Thu, 0552° / 36°

52 °

Mercer, Thursday, 5 November

Clear. High 52°, low 36°.

Pressure30.30 inHg

Wind8.6 mph NE

Humidity53%

Visibility—

Dew point33°

Fri, 0658° / 41°

58 °

Mercer, Friday, 6 November

Overcast. High 58°, low 41°.

Pressure30.21 inHg

Wind5 mph N

Humidity68%

Visibility—

Dew point43°

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

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)

Mon, 1650° / 33°

0.04

50 °

Mercer, Monday, 16 November

Climate normal for this date — 60-year average.

Average high50°

Average low33°

Average precipitation0.04 in

Chance of precipitation12%

Record high69° (2001)

Record low12° (2014)

Tue, 1750° / 34°

0.1

50 °

Mercer, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high50°

Average low34°

Average precipitation0.1 in

Chance of precipitation23%

Record high71° (2016)

Record low10° (2005)

Wed, 1849° / 34°

0.06

49 °

Mercer, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high49°

Average low34°

Average precipitation0.06 in

Chance of precipitation22%

Record high71° (1999)

Record low7° (1961)

Thu, 1949° / 33°

0.07

49 °

Mercer, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high49°

Average low33°

Average precipitation0.07 in

Chance of precipitation25%

Record high67° (2007)

Record low14° (1961)

Fri, 2046° / 31°

0.07

46 °

Mercer, Friday, 20 November

Climate normal for this date — 60-year average.

Average high46°

Average low31°

Average precipitation0.07 in

Chance of precipitation23%

Record high65° (1990)

Record low11° (1985)

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.