As of 13:53 CDT

Weather in Merrimac, WI

63°Current weather

Merrimac, Sunday, 18 October, 13:53

Clear. Feels like 61°. High 63°, low 42°.

Pressure30.27 inHg
Wind14.1 mph SW
Humidity47%
Visibility6.2 mi
Dew point43°

Monthly outlook for Merrimac, WI: average high 60.4°, average low 43.8°. That is 3.1° above the climate normal for October. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 24 October (68.1°), the coolest 2 November (33.7°).

60.4°/43.8°
Average high / low
+3.1°
Above normal
4 / 5
Wet days / normal
0.7 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
18 October – 27 October61.7°56°+3.1°
28 October – 6 November58.3°51.6°+3.7°
7 November – 16 Novemberat normal45.6°—

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).

Mon, 1963° / 40°0Overcast
63 °Overcast

Merrimac, Monday, 19 October

Overcast. High 63°, low 40°.

Pressure30.39 inHg
Wind2.7 mph SW
Humidity64%
Visibility6.2 mi
Dew point46°
Tue, 2064° / 41°0Clear
64 °Clear

Merrimac, Tuesday, 20 October

Clear. High 64°, low 41°.

Pressure30.39 inHg
Wind5 mph S
Humidity60%
Visibility6.2 mi
Dew point46°
Wed, 2167° / 45°0Partly cloudy
67 °Partly cloudy

Merrimac, Wednesday, 21 October

Partly cloudy. High 67°, low 45°.

Pressure30.27 inHg
Wind5.1 mph SW
Humidity62%
Visibility6.2 mi
Dew point50°
Thu, 2265° / 47°0Partly cloudy
65 °Partly cloudy

Merrimac, Thursday, 22 October

Partly cloudy. High 65°, low 47°.

Pressure30.36 inHg
Wind5.6 mph E
Humidity79%
Visibility6.2 mi
Dew point52°
Fri, 2363° / 49°0Overcast
63 °Overcast

Merrimac, Friday, 23 October

Overcast. High 63°, low 49°.

Pressure30.33 inHg
Wind10.5 mph SE
Humidity60%
Visibility—
Dew point47°
Sat, 2468° / 54°0.2Rain
68 °Rain

Merrimac, Saturday, 24 October

Rain. High 68°, low 54°.

Pressure30.12 inHg
Wind19.4 mph S
Humidity49%
Visibility—
Dew point47°
Sun, 2555° / 41°0Clear
55 °Clear

Merrimac, Sunday, 25 October

Clear. High 55°, low 41°.

Pressure30.47 inHg
Wind11.6 mph NW
Humidity35%
Visibility—
Dew point24°
Mon, 2648° / 39°0Overcast
48 °Overcast

Merrimac, Monday, 26 October

Overcast. High 48°, low 39°.

Pressure30.33 inHg
Wind5.7 mph S
Humidity58%
Visibility—
Dew point32°
Tue, 2760° / 47°0.07Light rain
60 °Light rain

Merrimac, Tuesday, 27 October

Light rain. High 60°, low 47°.

Pressure30.30 inHg
Wind9.3 mph SE
Humidity79%
Visibility—
Dew point49°
Wed, 2859° / 51°0Light rain
59 °Light rain

Merrimac, Wednesday, 28 October

Light rain. High 59°, low 51°.

Pressure29.88 inHg
Wind12.5 mph S
Humidity81%
Visibility—
Dew point50°
Thu, 2967° / 49°0Partly cloudy
67 °Partly cloudy

Merrimac, Thursday, 29 October

Partly cloudy. High 67°, low 49°.

Pressure29.71 inHg
Wind12.5 mph W
Humidity56%
Visibility—
Dew point49°
Fri, 3062° / 46°0.2Rain
62 °Rain

Merrimac, Friday, 30 October

Rain. High 62°, low 46°.

Pressure29.80 inHg
Wind15.6 mph SE
Humidity48%
Visibility—
Dew point39°
Sat, 3161° / 38°0.24Rain
61 °Rain

Merrimac, Saturday, 31 October

Rain. High 61°, low 38°.

Pressure29.53 inHg
Wind25.8 mph SW
Humidity57%
Visibility—
Dew point33°
Sun, 0149° / 37°0.01Light snow
49 °Light snow

Merrimac, Sunday, 1 November

Light snow. High 49°, low 37°.

Pressure30.12 inHg
Wind22.7 mph W
Humidity51%
Visibility—
Dew point28°
Mon, 0253° / 34°0Overcast
53 °Overcast

Merrimac, Monday, 2 November

Overcast. High 53°, low 34°.

Pressure30.36 inHg
Wind13.7 mph S
Humidity40%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0350° / 37°0.06Climate normal
50 °Climate normal

Merrimac, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high50°
Average low37°
Average precipitation0.06 in
Chance of precipitation23%
Record high71° (1964)
Record low15° (1991)
Wed, 0450° / 37°0.09Climate normal
50 °Climate normal

Merrimac, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high50°
Average low37°
Average precipitation0.09 in
Chance of precipitation30%
Record high71° (2008)
Record low11° (1991)
Thu, 0550° / 37°0.09Climate normal
50 °Climate normal

Merrimac, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high50°
Average low37°
Average precipitation0.09 in
Chance of precipitation28%
Record high68° (2015)
Record low18° (1991)
Fri, 0649° / 35°0.08Climate normal
49 °Climate normal

Merrimac, Friday, 6 November

Climate normal for this date — 60-year average.

Average high49°
Average low35°
Average precipitation0.08 in
Chance of precipitation30%
Record high69° (2020)
Record low13° (1991)
Sat, 0749° / 35°0.03Climate normal
49 °Climate normal

Merrimac, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high49°
Average low35°
Average precipitation0.03 in
Chance of precipitation18%
Record high68° (2020)
Record low0° (1991)
Sun, 0848° / 35°0.04Climate normal
48 °Climate normal

Merrimac, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high48°
Average low35°
Average precipitation0.04 in
Chance of precipitation22%
Record high71° (2020)
Record low3° (2019)
Mon, 0948° / 35°0.1Climate normal
48 °Climate normal

Merrimac, Monday, 9 November

Climate normal for this date — 60-year average.

Average high48°
Average low35°
Average precipitation0.1 in
Chance of precipitation35%
Record high72° (2020)
Record low18° (1991)
Tue, 1046° / 34°0.13Climate normal
46 °Climate normal

Merrimac, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high46°
Average low34°
Average precipitation0.13 in
Chance of precipitation33%
Record high71° (2022)
Record low13° (2017)
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)

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.