As of 12:40 CDT

Weather in Merrimac, WI

58°Current weather

Merrimac, Saturday, 31 October, 12:40

Overcast. Feels like 57°. High 59°, low 49°.

Pressure30.33 inHg
Wind7.3 mph S
Humidity78%
Visibility6.2 mi
Dew point51°

Monthly outlook for Merrimac, WI: average high 55.9°, average low 44.8°. That is 4.5° above the climate normal for October. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 1 November (66.7°), the coolest 15 November (34.2°).

55.9°/44.8°
Average high / low
+4.5°
Above normal
4 / 4
Wet days / normal
1.1 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
31 October – 9 November59°49.9°+5°
10 November – 19 November50.9°44.4°+3.6°
20 November – 29 Novemberat normal39.7°—

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).

Sun, 0167° / 48°0Overcast
67 °Overcast

Merrimac, Sunday, 1 November

Overcast. High 67°, low 48°.

Pressure30.30 inHg
Wind5.3 mph S
Humidity63%
Visibility6.2 mi
Dew point50°
Mon, 0260° / 51°0.25Rain
60 °Rain

Merrimac, Monday, 2 November

Rain. High 60°, low 51°.

Pressure30.06 inHg
Wind8.5 mph SE
Humidity84%
Visibility6.2 mi
Dew point50°
Tue, 0366° / 59°0.59Rain
66 °Rain

Merrimac, Tuesday, 3 November

Rain. High 66°, low 59°.

Pressure29.80 inHg
Wind12.9 mph S
Humidity92%
Visibility4.5 mi
Dew point62°
Wed, 0463° / 55°0.17Light rain
63 °Light rain

Merrimac, Wednesday, 4 November

Light rain. High 63°, low 55°.

Pressure29.59 inHg
Wind6.9 mph S
Humidity92%
Visibility2.8 mi
Dew point60°
Thu, 0555° / 51°0.02Light rain
55 °Light rain

Merrimac, Thursday, 5 November

Light rain. High 55°, low 51°.

Pressure29.74 inHg
Wind12.2 mph N
Humidity86%
Visibility—
Dew point50°
Fri, 0656° / 46°0Overcast
56 °Overcast

Merrimac, Friday, 6 November

Overcast. High 56°, low 46°.

Pressure29.94 inHg
Wind9.1 mph N
Humidity55%
Visibility—
Dew point38°
Sat, 0756° / 41°0Mostly clear
56 °Mostly clear

Merrimac, Saturday, 7 November

Mostly clear. High 56°, low 41°.

Pressure29.94 inHg
Wind5.5 mph N
Humidity54%
Visibility—
Dew point37°
Sun, 0853° / 39°0Partly cloudy
53 °Partly cloudy

Merrimac, Sunday, 8 November

Partly cloudy. High 53°, low 39°.

Pressure30.00 inHg
Wind12.7 mph N
Humidity51%
Visibility—
Dew point33°
Mon, 0955° / 38°0Clear
55 °Clear

Merrimac, Monday, 9 November

Clear. High 55°, low 38°.

Pressure30.06 inHg
Wind6.1 mph N
Humidity57%
Visibility—
Dew point36°
Tue, 1059° / 41°0Mostly clear
59 °Mostly clear

Merrimac, Tuesday, 10 November

Mostly clear. High 59°, low 41°.

Pressure30.06 inHg
Wind6.8 mph SW
Humidity54%
Visibility—
Dew point39°
Wed, 1150° / 46°0.09Light rain
50 °Light rain

Merrimac, Wednesday, 11 November

Light rain. High 50°, low 46°.

Pressure29.85 inHg
Wind16.1 mph NE
Humidity75%
Visibility—
Dew point42°
Thu, 1249° / 39°0Partly cloudy
49 °Partly cloudy

Merrimac, Thursday, 12 November

Partly cloudy. High 49°, low 39°.

Pressure30.18 inHg
Wind12.9 mph NE
Humidity58%
Visibility—
Dew point33°
Fri, 1351° / 36°0Overcast
51 °Overcast

Merrimac, Friday, 13 November

Overcast. High 51°, low 36°.

Pressure30.00 inHg
Wind17.4 mph SW
Humidity60%
Visibility—
Dew point35°
Sat, 1453° / 44°0Clear
53 °Clear

Merrimac, Saturday, 14 November

Clear. High 53°, low 44°.

Pressure29.88 inHg
Wind18.9 mph NW
Humidity46%
Visibility—
Dew point31°
Sun, 1545° / 34°0Partly cloudy
45 °Partly cloudy

Merrimac, Sunday, 15 November

Partly cloudy. High 45°, low 34°.

Pressure30.12 inHg
Wind11.1 mph NW
Humidity54%
Visibility—
Dew point27°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 1645° / 31°0.06Climate normal
45 °Climate normal

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°0.09Climate normal
45 °Climate normal

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°0.07Climate normal
44 °Climate normal

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°0.06Climate normal
44 °Climate normal

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°0.08Climate normal
42 °Climate normal

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°0.08Climate normal
41 °Climate normal

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°0.03Climate normal
41 °Climate normal

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°0.1Climate normal
42 °Climate normal

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°0.06Climate normal
40 °Climate normal

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°0.05Climate normal
40 °Climate normal

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°0.09Climate normal
39 °Climate normal

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)
Fri, 2738° / 26°0.13Climate normal
38 °Climate normal

Merrimac, Friday, 27 November

Climate normal for this date — 60-year average.

Average high38°
Average low26°
Average precipitation0.13 in
Chance of precipitation45%
Record high62° (1990)
Record low2° (1996)
Sat, 2837° / 25°0.09Climate normal
37 °Climate normal

Merrimac, Saturday, 28 November

Climate normal for this date — 60-year average.

Average high37°
Average low25°
Average precipitation0.09 in
Chance of precipitation23%
Record high62° (1998)
Record low4° (2014)
Sun, 2937° / 25°0.06Climate normal
37 °Climate normal

Merrimac, Sunday, 29 November

Climate normal for this date — 60-year average.

Average high37°
Average low25°
Average precipitation0.06 in
Chance of precipitation33%
Record high64° (1998)
Record low-5° (1995)

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.