As of 12:00 CDT

Weather in Merrimac, WI

62°Current weather

Merrimac, Thursday, 29 October, 12:00

Clear. Feels like 60°. High 64°, low 49°.

Pressure30.15 inHg
Wind10.1 mph NW
Humidity58%
Visibility6.2 mi
Dew point46°

Monthly outlook for Merrimac, WI: average high 57.7°, average low 45.4°. That is 4.8° above the climate normal for October. Precipitation is expected on 7 days (about 1.3 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 3 November (67.9°), the coolest 7 November (31°).

57.7°/45.4°
Average high / low
+4.8°
Above normal
7 / 4
Wet days / normal
1.3 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
29 October – 7 November59.8°51.1°+4.8°
8 November – 17 November54.2°45.2°+5°
18 November – 27 Novemberat normal41.1°—

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).

Fri, 3059° / 42°0Overcast
59 °Overcast

Merrimac, Friday, 30 October

Overcast. High 59°, low 42°.

Pressure30.39 inHg
Wind3.6 mph E
Humidity55%
Visibility6.2 mi
Dew point38°
Sat, 3159° / 50°0.07Light rain
59 °Light rain

Merrimac, Saturday, 31 October

Light rain. High 59°, low 50°.

Pressure30.33 inHg
Wind7.8 mph SE
Humidity73%
Visibility6.2 mi
Dew point48°
Sun, 0164° / 51°0.03Light rain
64 °Light rain

Merrimac, Sunday, 1 November

Light rain. High 64°, low 51°.

Pressure30.30 inHg
Wind5.5 mph SE
Humidity60%
Visibility6.2 mi
Dew point49°
Mon, 0262° / 55°0.31Light rain
62 °Light rain

Merrimac, Monday, 2 November

Light rain. High 62°, low 55°.

Pressure30.03 inHg
Wind11.4 mph S
Humidity85%
Visibility6.2 mi
Dew point56°
Tue, 0368° / 60°0.34Rain
68 °Rain

Merrimac, Tuesday, 3 November

Rain. High 68°, low 60°.

Pressure29.74 inHg
Wind18.6 mph S
Humidity78%
Visibility—
Dew point60°
Wed, 0466° / 59°0.14Light rain
66 °Light rain

Merrimac, Wednesday, 4 November

Light rain. High 66°, low 59°.

Pressure29.80 inHg
Wind10.9 mph SE
Humidity80%
Visibility—
Dew point59°
Thu, 0561° / 49°0.28Rain
61 °Rain

Merrimac, Thursday, 5 November

Rain. High 61°, low 49°.

Pressure29.59 inHg
Wind15.3 mph N
Humidity87%
Visibility—
Dew point56°
Fri, 0647° / 37°0.08Light rain
47 °Light rain

Merrimac, Friday, 6 November

Light rain. High 47°, low 37°.

Pressure29.88 inHg
Wind15.4 mph N
Humidity50%
Visibility—
Dew point27°
Sat, 0748° / 31°0Clear
48 °Clear

Merrimac, Saturday, 7 November

Clear. High 48°, low 31°.

Pressure30.27 inHg
Wind6.6 mph N
Humidity43%
Visibility—
Dew point23°
Sun, 0849° / 34°0Overcast
49 °Overcast

Merrimac, Sunday, 8 November

Overcast. High 49°, low 34°.

Pressure30.36 inHg
Wind4.8 mph SW
Humidity41%
Visibility—
Dew point24°
Mon, 0951° / 40°0Overcast
51 °Overcast

Merrimac, Monday, 9 November

Overcast. High 51°, low 40°.

Pressure30.27 inHg
Wind4.1 mph SW
Humidity54%
Visibility—
Dew point33°
Tue, 1053° / 37°0Partly cloudy
53 °Partly cloudy

Merrimac, Tuesday, 10 November

Partly cloudy. High 53°, low 37°.

Pressure30.15 inHg
Wind7.5 mph W
Humidity56%
Visibility—
Dew point35°
Wed, 1158° / 40°0Clear
58 °Clear

Merrimac, Wednesday, 11 November

Clear. High 58°, low 40°.

Pressure30.03 inHg
Wind7 mph W
Humidity66%
Visibility—
Dew point44°
Thu, 1256° / 43°0Overcast
56 °Overcast

Merrimac, Thursday, 12 November

Overcast. High 56°, low 43°.

Pressure29.77 inHg
Wind14.3 mph SE
Humidity54%
Visibility—
Dew point38°
Fri, 1358° / 50°0.06Light rain
58 °Light rain

Merrimac, Friday, 13 November

Light rain. High 58°, low 50°.

Pressure29.47 inHg
Wind14.7 mph SE
Humidity66%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 1444° / 31°0.03Climate normal
44 °Climate normal

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°0.06Climate normal
45 °Climate normal

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°0.06Climate 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)

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.