As of 14:38 CDT

Weather in Merrimac, WI

73°

Merrimac, Wednesday, 28 October, 14:38

Clear. Feels like 73°. High 73°, low 50°.

Pressure30.03 inHg

Wind1 mph NE

Humidity62%

Visibility6.2 mi

Dew point59°

See detailed hourly forecast

Monthly outlook for Merrimac, WI: average high 54.6°, average low 42.1°. That is 2.8° above the climate normal for October. Precipitation is expected on 6 days (about 2.5 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 28 October (73°), the coolest 12 November (28.8°).

54.6°/42.1°

Average high / low

+2.8°

Above normal

6 / 4

Wet days / normal

2.5 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
28 October – 6 November	60.3°	51.6°	+4.9°
7 November – 16 November	45.2°	45.6°	-0.2°
17 November – 26 November	at normal	41.8°	—

October records over 66 years

85.3°3 October 2025All-time high

21.2°30 October 1988All-time low

Climate normals and records are computed from the nearest reference point — Sauk City (9 mi).

Thu, 2963° / 46°

0.04

63 °

Merrimac, Thursday, 29 October

Light rain. High 63°, low 46°.

Pressure30.12 inHg

Wind8.1 mph NW

Humidity52%

Visibility6.2 mi

Dew point42°

Fri, 3060° / 41°

60 °

Merrimac, Friday, 30 October

Light rain. High 60°, low 41°.

Pressure30.36 inHg

Wind4.8 mph SE

Humidity53%

Visibility6.2 mi

Dew point39°

Sat, 3163° / 52°

63 °

Merrimac, Saturday, 31 October

Overcast. High 63°, low 52°.

Pressure30.30 inHg

Wind7.2 mph E

Humidity64%

Visibility6.2 mi

Dew point48°

Sun, 0164° / 46°

64 °

Merrimac, Sunday, 1 November

Clear. High 64°, low 46°.

Pressure30.33 inHg

Wind4.1 mph E

Humidity76%

Visibility6.2 mi

Dew point50°

Mon, 0265° / 50°

65 °

Merrimac, Monday, 2 November

Overcast. High 65°, low 50°.

Pressure30.09 inHg

Wind11.9 mph S

Humidity72%

Visibility—

Dew point53°

Tue, 0358° / 53°

0.57

58 °

Merrimac, Tuesday, 3 November

Rain. High 58°, low 53°.

Pressure30.00 inHg

Wind16.6 mph E

Humidity93%

Visibility—

Dew point51°

Wed, 0454° / 53°

0.91

54 °

Merrimac, Wednesday, 4 November

Rain. High 54°, low 53°.

Pressure29.83 inHg

Wind10.7 mph E

Humidity97%

Visibility—

Dew point53°

Thu, 0556° / 47°

0.08

56 °

Merrimac, Thursday, 5 November

Light rain. High 56°, low 47°.

Pressure29.74 inHg

Wind12.2 mph N

Humidity86%

Visibility—

Dew point50°

Fri, 0648° / 37°

48 °

Merrimac, Friday, 6 November

Mostly clear. High 48°, low 37°.

Pressure30.03 inHg

Wind10.4 mph N

Humidity45%

Visibility—

Dew point26°

Sat, 0745° / 34°

45 °

Merrimac, Saturday, 7 November

Mostly clear. High 45°, low 34°.

Pressure30.33 inHg

Wind6.2 mph NE

Humidity49%

Visibility—

Dew point24°

Sun, 0848° / 31°

48 °

Merrimac, Sunday, 8 November

Clear. High 48°, low 31°.

Pressure30.36 inHg

Wind7.2 mph S

Humidity46%

Visibility—

Dew point25°

Mon, 0949° / 36°

0.12

49 °

Merrimac, Monday, 9 November

Light rain. High 49°, low 36°.

Pressure30.15 inHg

Wind12 mph SE

Humidity47%

Visibility—

Dew point28°

Tue, 1044° / 36°

0.69

44 °

Merrimac, Tuesday, 10 November

Rain. High 44°, low 36°.

Pressure30.00 inHg

Wind19 mph NE

Humidity95%

Visibility—

Dew point43°

Wed, 1142° / 32°

42 °

Merrimac, Wednesday, 11 November

Overcast. High 42°, low 32°.

Pressure30.24 inHg

Wind18.4 mph NE

Humidity58%

Visibility—

Dew point27°

Thu, 1243° / 29°

43 °

Merrimac, Thursday, 12 November

Mostly clear. High 43°, low 29°.

Pressure30.18 inHg

Wind11.1 mph NE

Humidity60%

Visibility—

Dew point28°

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

Fri, 1344° / 31°

0.04

44 °

Merrimac, Friday, 13 November

Climate normal for this date — 60-year average.

Average high44°

Average low31°

Average precipitation0.04 in

Chance of precipitation18%

Record high67° (1999)

Record low6° (1986)

Sat, 1444° / 31°

0.03

44 °

Merrimac, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high44°

Average low31°

Average precipitation0.03 in

Chance of precipitation20%

Record high66° (2025)

Record low15° (1986)

Sun, 1545° / 32°

0.06

45 °

Merrimac, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high45°

Average low32°

Average precipitation0.06 in

Chance of precipitation28%

Record high67° (2001)

Record low18° (2014)

Mon, 1645° / 31°

0.06

45 °

Merrimac, Monday, 16 November

Climate normal for this date — 60-year average.

Average high45°

Average low31°

Average precipitation0.06 in

Chance of precipitation23%

Record high62° (1975)

Record low19° (1989)

Tue, 1745° / 32°

0.09

45 °

Merrimac, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high45°

Average low32°

Average precipitation0.09 in

Chance of precipitation25%

Record high68° (2016)

Record low12° (2005)

Wed, 1844° / 31°

0.07

44 °

Merrimac, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high44°

Average low31°

Average precipitation0.07 in

Chance of precipitation30%

Record high64° (2001)

Record low10° (2014)

Thu, 1944° / 31°

0.06

44 °

Merrimac, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high44°

Average low31°

Average precipitation0.06 in

Chance of precipitation23%

Record high62° (1975)

Record low7° (1986)

Fri, 2042° / 31°

0.08

42 °

Merrimac, Friday, 20 November

Climate normal for this date — 60-year average.

Average high42°

Average low31°

Average precipitation0.08 in

Chance of precipitation30%

Record high61° (1982)

Record low10° (2022)

Sat, 2141° / 28°

0.08

41 °

Merrimac, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high41°

Average low28°

Average precipitation0.08 in

Chance of precipitation25%

Record high64° (1990)

Record low6° (1964)

Sun, 2241° / 28°

0.03

41 °

Merrimac, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high41°

Average low28°

Average precipitation0.03 in

Chance of precipitation15%

Record high61° (2012)

Record low5° (2015)

Mon, 2342° / 29°

0.1

42 °

Merrimac, Monday, 23 November

Climate normal for this date — 60-year average.

Average high42°

Average low29°

Average precipitation0.1 in

Chance of precipitation32%

Record high60° (1983)

Record low10° (1970)

Tue, 2440° / 28°

0.06

40 °

Merrimac, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high40°

Average low28°

Average precipitation0.06 in

Chance of precipitation25%

Record high59° (2017)

Record low4° (1985)

Wed, 2540° / 28°

0.05

40 °

Merrimac, Wednesday, 25 November

Climate normal for this date — 60-year average.

Average high40°

Average low28°

Average precipitation0.05 in

Chance of precipitation32%

Record high54° (1998)

Record low6° (1977)

Thu, 2639° / 27°

0.09

39 °

Merrimac, Thursday, 26 November

Climate normal for this date — 60-year average.

Average high39°

Average low27°

Average precipitation0.09 in

Chance of precipitation35%

Record high61° (1990)

Record low-3° (1977)

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, WI 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, WI 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.