As of 17:03 CDT

Weather in Merrimac, WI

57°Current weather

Merrimac, Monday, 26 October, 17:03

Overcast. Feels like 55°. High 58°, low 49°.

Pressure30.33 inHg
Wind1 mph W
Humidity60%
Visibility6.2 mi
Dew point43°

Monthly outlook for Merrimac, WI: average high 56.9°, average low 45.1°. That is 3.3° above the climate normal for October. Precipitation is expected on 6 days (about 0.9 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 28 October (69.5°), the coolest 6 November (33.9°).

56.9°/45.1°
Average high / low
+3.3°
Above normal
6 / 4
Wet days / normal
0.9 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
26 October – 4 November59.1°52.5°+3.7°
5 November – 14 November53.3°46.5°+3.7°
15 November – 24 Novemberat normal42.8°—

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).

Tue, 2764° / 47°0.06Light rain
64 °Light rain

Merrimac, Tuesday, 27 October

Light rain. High 64°, low 47°.

Pressure30.24 inHg
Wind7.1 mph SE
Humidity80%
Visibility6.2 mi
Dew point49°
Wed, 2870° / 51°0.02Light rain
70 °Light rain

Merrimac, Wednesday, 28 October

Light rain. High 70°, low 51°.

Pressure30.12 inHg
Wind7.4 mph S
Humidity63%
Visibility6.2 mi
Dew point53°
Thu, 2967° / 49°0.14Rain
67 °Rain

Merrimac, Thursday, 29 October

Rain. High 67°, low 49°.

Pressure30.09 inHg
Wind7.5 mph NW
Humidity70%
Visibility6.2 mi
Dew point53°
Fri, 3063° / 43°0Overcast
63 °Overcast

Merrimac, Friday, 30 October

Overcast. High 63°, low 43°.

Pressure30.27 inHg
Wind3.8 mph SE
Humidity55%
Visibility6.2 mi
Dew point42°
Sat, 3161° / 53°0.21Light rain
61 °Light rain

Merrimac, Saturday, 31 October

Light rain. High 61°, low 53°.

Pressure30.18 inHg
Wind6.1 mph E
Humidity78%
Visibility—
Dew point53°
Sun, 0157° / 53°0.11Light rain
57 °Light rain

Merrimac, Sunday, 1 November

Light rain. High 57°, low 53°.

Pressure30.00 inHg
Wind6.4 mph N
Humidity94%
Visibility—
Dew point54°
Mon, 0254° / 52°0.04Light rain
54 °Light rain

Merrimac, Monday, 2 November

Light rain. High 54°, low 52°.

Pressure29.91 inHg
Wind13.6 mph E
Humidity88%
Visibility—
Dew point51°
Tue, 0352° / 45°0.16Light rain
52 °Light rain

Merrimac, Tuesday, 3 November

Light rain. High 52°, low 45°.

Pressure29.85 inHg
Wind24.8 mph NE
Humidity76%
Visibility—
Dew point41°
Wed, 0447° / 43°0.01Light rain
47 °Light rain

Merrimac, Wednesday, 4 November

Light rain. High 47°, low 43°.

Pressure30.09 inHg
Wind19.9 mph NE
Humidity58%
Visibility—
Dew point32°
Thu, 0550° / 37°0Overcast
50 °Overcast

Merrimac, Thursday, 5 November

Overcast. High 50°, low 37°.

Pressure30.15 inHg
Wind13.7 mph N
Humidity50%
Visibility—
Dew point29°
Fri, 0653° / 34°0Clear
53 °Clear

Merrimac, Friday, 6 November

Clear. High 53°, low 34°.

Pressure30.18 inHg
Wind4.5 mph S
Humidity37%
Visibility—
Dew point24°
Sat, 0754° / 35°0Partly cloudy
54 °Partly cloudy

Merrimac, Saturday, 7 November

Partly cloudy. High 54°, low 35°.

Pressure30.06 inHg
Wind14.7 mph S
Humidity46%
Visibility—
Dew point31°
Sun, 0858° / 48°0Overcast
58 °Overcast

Merrimac, Sunday, 8 November

Overcast. High 58°, low 48°.

Pressure29.77 inHg
Wind16.7 mph SW
Humidity60%
Visibility—
Dew point42°
Mon, 0959° / 44°0.01Light rain
59 °Light rain

Merrimac, Monday, 9 November

Light rain. High 59°, low 44°.

Pressure29.77 inHg
Wind6.7 mph SW
Humidity42%
Visibility—
Dew point34°
Tue, 1046° / 39°0.13Light rain
46 °Light rain

Merrimac, Tuesday, 10 November

Light rain. High 46°, low 39°.

Pressure29.65 inHg
Wind14.6 mph NW
Humidity93%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 1144° / 31°0.07Climate normal
44 °Climate normal

Merrimac, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high44°
Average low31°
Average precipitation0.07 in
Chance of precipitation28%
Record high68° (1964)
Record low13° (2019)
Thu, 1243° / 30°0.06Climate normal
43 °Climate normal

Merrimac, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high43°
Average low30°
Average precipitation0.06 in
Chance of precipitation30%
Record high63° (1964)
Record low1° (2019)
Fri, 1344° / 31°0.04Climate normal
44 °Climate normal

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°0.03Climate 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)

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.