As of 02:47 CDT

Weather in Merrimac, IA

50°

Merrimac, Friday, 30 October, 02:47

Overcast. Feels like 48°. High 61°, low 49°.

Pressure30.27 inHg

Wind6.3 mph E

Humidity77%

Visibility6.2 mi

Dew point43°

See detailed hourly forecast

Monthly outlook for Merrimac, IA: average high 57.2°, average low 47.6°. That is 2.4° above the climate normal for October. Precipitation is expected on 9 days (about 2.8 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 1 November (70.2°), the coolest 11 November (39.6°).

57.2°/47.6°

Average high / low

+2.4°

Above normal

9 / 4

Wet days / normal

2.8 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
30 October – 8 November	61.7°	54.8°	+3.8°
9 November – 18 November	49.8°	49.7°	+0°
19 November – 28 November	at normal	45.2°	—

October records over 66 years

93.2°6 October 1963All-time high

17.2°29 October 1980All-time low

Climate normals and records are computed from the nearest reference point — Fairfield (14 mi).

Sat, 3169° / 52°

0.24

69 °

Merrimac, Saturday, 31 October

Rain. High 69°, low 52°.

Pressure30.27 inHg

Wind2.3 mph E

Humidity87%

Visibility6.2 mi

Dew point58°

Sun, 0170° / 56°

70 °

Merrimac, Sunday, 1 November

Clear. High 70°, low 56°.

Pressure30.27 inHg

Wind6.3 mph SE

Humidity69%

Visibility6.2 mi

Dew point56°

Mon, 0265° / 57°

0.22

65 °

Merrimac, Monday, 2 November

Light rain. High 65°, low 57°.

Pressure30.00 inHg

Wind14.4 mph SE

Humidity81%

Visibility6.2 mi

Dew point57°

Tue, 0367° / 57°

1.04

67 °

Merrimac, Tuesday, 3 November

Rain. High 67°, low 57°.

Pressure29.77 inHg

Wind19.2 mph S

Humidity88%

Visibility—

Dew point63°

Wed, 0459° / 50°

0.26

59 °

Merrimac, Wednesday, 4 November

Rain. High 59°, low 50°.

Pressure29.77 inHg

Wind15.7 mph N

Humidity65%

Visibility—

Dew point46°

Thu, 0558° / 49°

58 °

Merrimac, Thursday, 5 November

Overcast. High 58°, low 49°.

Pressure29.80 inHg

Wind10.2 mph N

Humidity67%

Visibility—

Dew point44°

Fri, 0658° / 45°

58 °

Merrimac, Friday, 6 November

Overcast. High 58°, low 45°.

Pressure29.91 inHg

Wind8 mph NE

Humidity60%

Visibility—

Dew point42°

Sat, 0758° / 46°

58 °

Merrimac, Saturday, 7 November

Overcast. High 58°, low 46°.

Pressure30.15 inHg

Wind8.3 mph E

Humidity64%

Visibility—

Dew point43°

Sun, 0851° / 45°

0.16

51 °

Merrimac, Sunday, 8 November

Light rain. High 51°, low 45°.

Pressure29.97 inHg

Wind17.1 mph E

Humidity73%

Visibility—

Dew point43°

Mon, 0945° / 43°

0.26

45 °

Merrimac, Monday, 9 November

Rain. High 45°, low 43°.

Pressure30.03 inHg

Wind11.6 mph N

Humidity88%

Visibility—

Dew point41°

Tue, 1046° / 40°

46 °

Merrimac, Tuesday, 10 November

Overcast. High 46°, low 40°.

Pressure30.18 inHg

Wind8.6 mph N

Humidity69%

Visibility—

Dew point36°

Wed, 1151° / 40°

0.17

51 °

Merrimac, Wednesday, 11 November

Rain. High 51°, low 40°.

Pressure29.94 inHg

Wind9.1 mph SE

Humidity61%

Visibility—

Dew point35°

Thu, 1249° / 44°

0.32

49 °

Merrimac, Thursday, 12 November

Rain. High 49°, low 44°.

Pressure29.56 inHg

Wind11.7 mph SE

Humidity96%

Visibility—

Dew point46°

Fri, 1357° / 40°

57 °

Merrimac, Friday, 13 November

Clear. High 57°, low 40°.

Pressure29.80 inHg

Wind10.4 mph W

Humidity55%

Visibility—

Dew point37°

Sat, 1451° / 49°

0.03

51 °

Merrimac, Saturday, 14 November

Light rain. High 51°, low 49°.

Pressure29.68 inHg

Wind12.3 mph S

Humidity96%

Visibility—

Dew point48°

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

Sun, 1549° / 34°

0.06

49 °

Merrimac, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high49°

Average low34°

Average precipitation0.06 in

Chance of precipitation20%

Record high71° (2001)

Record low5° (1972)

Mon, 1649° / 34°

0.05

49 °

Merrimac, Monday, 16 November

Climate normal for this date — 60-year average.

Average high49°

Average low34°

Average precipitation0.05 in

Chance of precipitation20%

Record high70° (2001)

Record low17° (1997)

Tue, 1750° / 35°

0.12

50 °

Merrimac, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high50°

Average low35°

Average precipitation0.12 in

Chance of precipitation23%

Record high74° (2016)

Record low15° (2005)

Wed, 1849° / 35°

0.06

49 °

Merrimac, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high49°

Average low35°

Average precipitation0.06 in

Chance of precipitation27%

Record high72° (1999)

Record low11° (2014)

Thu, 1950° / 34°

0.06

50 °

Merrimac, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high50°

Average low34°

Average precipitation0.06 in

Chance of precipitation25%

Record high70° (2007)

Record low19° (2022)

Fri, 2047° / 33°

0.1

47 °

Merrimac, Friday, 20 November

Climate normal for this date — 60-year average.

Average high47°

Average low33°

Average precipitation0.1 in

Chance of precipitation30%

Record high66° (2003)

Record low15° (1964)

Sat, 2146° / 31°

0.06

46 °

Merrimac, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high46°

Average low31°

Average precipitation0.06 in

Chance of precipitation25%

Record high69° (1990)

Record low8° (1964)

Sun, 2246° / 31°

0.04

46 °

Merrimac, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high46°

Average low31°

Average precipitation0.04 in

Chance of precipitation18%

Record high67° (1966)

Record low9° (2015)

Mon, 2346° / 31°

0.08

46 °

Merrimac, Monday, 23 November

Climate normal for this date — 60-year average.

Average high46°

Average low31°

Average precipitation0.08 in

Chance of precipitation25%

Record high68° (1966)

Record low11° (1970)

Tue, 2445° / 30°

0.06

45 °

Merrimac, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high45°

Average low30°

Average precipitation0.06 in

Chance of precipitation17%

Record high65° (1966)

Record low9° (1985)

Wed, 2545° / 30°

0.06

45 °

Merrimac, Wednesday, 25 November

Climate normal for this date — 60-year average.

Average high45°

Average low30°

Average precipitation0.06 in

Chance of precipitation22%

Record high60° (2006)

Record low2° (1991)

Thu, 2645° / 30°

0.11

45 °

Merrimac, Thursday, 26 November

Climate normal for this date — 60-year average.

Average high45°

Average low30°

Average precipitation0.11 in

Chance of precipitation32%

Record high70° (1965)

Record low4° (1977)

Fri, 2742° / 29°

0.13

42 °

Merrimac, Friday, 27 November

Climate normal for this date — 60-year average.

Average high42°

Average low29°

Average precipitation0.13 in

Chance of precipitation43%

Record high68° (1990)

Record low8° (2018)

Sat, 2840° / 26°

0.07

40 °

Merrimac, Saturday, 28 November

Climate normal for this date — 60-year average.

Average high40°

Average low26°

Average precipitation0.07 in

Chance of precipitation18%

Record high67° (1998)

Record low5° (2018)

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 Merrimac, 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 Merrimac, 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.