As of 12:03 CST

Weather in Merrimac, IL

50°Current weather

Merrimac, Sunday, 15 November, 12:03

Overcast. Feels like 48°. High 51°, low 27°.

Pressure30.45 inHg
Wind4 mph NE
Humidity54%
Visibility6.2 mi
Dew point34°

Monthly outlook for Merrimac, IL: average high 57.6°, average low 40.2°. That is 3.2° above the climate normal for November. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 20 November (68.4°), the coolest 16 November (26.4°).

57.6°/40.2°
Average high / low
+3.2°
Above normal
3 / 5
Wet days / normal
0.6 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
15 November – 24 November59.4°53.4°+3.3°
25 November – 4 December54.6°48.4°+3.5°
5 December – 14 Decemberat normal44.6°—

November records over 66 years

80.8°8 November 2023All-time high
5.2°8 November 1991All-time low

Climate normals and records are computed from the nearest reference point — St. George (12 mi).

Mon, 1657° / 26°0Clear
57 °Clear

Merrimac, Monday, 16 November

Clear. High 57°, low 26°.

Pressure30.53 inHg
Wind2.3 mph SE
Humidity50%
Visibility6.2 mi
Dew point35°
Tue, 1758° / 33°0Clear
58 °Clear

Merrimac, Tuesday, 17 November

Clear. High 58°, low 33°.

Pressure30.50 inHg
Wind5.3 mph S
Humidity53%
Visibility6.2 mi
Dew point39°
Wed, 1862° / 40°0Overcast
62 °Overcast

Merrimac, Wednesday, 18 November

Overcast. High 62°, low 40°.

Pressure30.36 inHg
Wind9.8 mph S
Humidity48%
Visibility6.2 mi
Dew point40°
Thu, 1966° / 49°0Overcast
66 °Overcast

Merrimac, Thursday, 19 November

Overcast. High 66°, low 49°.

Pressure30.36 inHg
Wind7 mph SW
Humidity65%
Visibility6.2 mi
Dew point50°
Fri, 2068° / 52°0.04Light rain
68 °Light rain

Merrimac, Friday, 20 November

Light rain. High 68°, low 52°.

Pressure30.30 inHg
Wind8.3 mph S
Humidity58%
Visibility—
Dew point49°
Sat, 2168° / 47°0.02Light rain
68 °Light rain

Merrimac, Saturday, 21 November

Light rain. High 68°, low 47°.

Pressure30.06 inHg
Wind13.2 mph S
Humidity30%
Visibility—
Dew point33°
Sun, 2259° / 46°0Clear
59 °Clear

Merrimac, Sunday, 22 November

Clear. High 59°, low 46°.

Pressure30.18 inHg
Wind11.2 mph NW
Humidity43%
Visibility—
Dew point34°
Mon, 2351° / 39°0Partly cloudy
51 °Partly cloudy

Merrimac, Monday, 23 November

Partly cloudy. High 51°, low 39°.

Pressure30.30 inHg
Wind8.5 mph NE
Humidity38%
Visibility—
Dew point24°
Tue, 2452° / 34°0Overcast
52 °Overcast

Merrimac, Tuesday, 24 November

Overcast. High 52°, low 34°.

Pressure30.30 inHg
Wind6.6 mph E
Humidity37%
Visibility—
Dew point23°
Wed, 2555° / 35°0Overcast
55 °Overcast

Merrimac, Wednesday, 25 November

Overcast. High 55°, low 35°.

Pressure30.18 inHg
Wind5.7 mph SE
Humidity43%
Visibility—
Dew point27°
Thu, 2662° / 45°0.18Rain
62 °Rain

Merrimac, Thursday, 26 November

Rain. High 62°, low 45°.

Pressure30.06 inHg
Wind9.8 mph SE
Humidity38%
Visibility—
Dew point34°
Fri, 2753° / 49°0.39Rain
53 °Rain

Merrimac, Friday, 27 November

Rain. High 53°, low 49°.

Pressure30.00 inHg
Wind5.9 mph E
Humidity88%
Visibility—
Dew point48°
Sat, 2854° / 42°0Clear
54 °Clear

Merrimac, Saturday, 28 November

Clear. High 54°, low 42°.

Pressure30.03 inHg
Wind7 mph NW
Humidity51%
Visibility—
Dew point34°
Sun, 2953° / 37°0Overcast
53 °Overcast

Merrimac, Sunday, 29 November

Overcast. High 53°, low 37°.

Pressure30.06 inHg
Wind9.8 mph E
Humidity54%
Visibility—
Dew point33°
Mon, 3051° / 42°0Overcast
51 °Overcast

Merrimac, Monday, 30 November

Overcast. High 51°, low 42°.

Pressure30.12 inHg
Wind12 mph N
Humidity55%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0147° / 33°0.11Climate normal
47 °Climate normal

Merrimac, Tuesday, 1 December

Climate normal for this date — 60-year average.

Average high47°
Average low33°
Average precipitation0.11 in
Chance of precipitation27%
Record high70° (1970)
Record low17° (1985)
Wed, 0249° / 33°0.09Climate normal
49 °Climate normal

Merrimac, Wednesday, 2 December

Climate normal for this date — 60-year average.

Average high49°
Average low33°
Average precipitation0.09 in
Chance of precipitation23%
Record high72° (2012)
Record low11° (1985)
Thu, 0347° / 33°0.13Climate normal
47 °Climate normal

Merrimac, Thursday, 3 December

Climate normal for this date — 60-year average.

Average high47°
Average low33°
Average precipitation0.13 in
Chance of precipitation35%
Record high73° (1998)
Record low14° (1985)
Fri, 0446° / 33°0.08Climate normal
46 °Climate normal

Merrimac, Friday, 4 December

Climate normal for this date — 60-year average.

Average high46°
Average low33°
Average precipitation0.08 in
Chance of precipitation25%
Record high70° (1998)
Record low4° (2006)
Sat, 0547° / 31°0.11Climate normal
47 °Climate normal

Merrimac, Saturday, 5 December

Climate normal for this date — 60-year average.

Average high47°
Average low31°
Average precipitation0.11 in
Chance of precipitation27%
Record high72° (1998)
Record low12° (2025)
Sun, 0644° / 31°0.06Climate normal
44 °Climate normal

Merrimac, Sunday, 6 December

Climate normal for this date — 60-year average.

Average high44°
Average low31°
Average precipitation0.06 in
Chance of precipitation37%
Record high71° (1998)
Record low7° (1977)
Mon, 0744° / 30°0.09Climate normal
44 °Climate normal

Merrimac, Monday, 7 December

Climate normal for this date — 60-year average.

Average high44°
Average low30°
Average precipitation0.09 in
Chance of precipitation25%
Record high68° (1980)
Record low-1° (1977)
Tue, 0844° / 31°0.09Climate normal
44 °Climate normal

Merrimac, Tuesday, 8 December

Climate normal for this date — 60-year average.

Average high44°
Average low31°
Average precipitation0.09 in
Chance of precipitation32%
Record high68° (1991)
Record low11° (2006)
Wed, 0945° / 30°0.08Climate normal
45 °Climate normal

Merrimac, Wednesday, 9 December

Climate normal for this date — 60-year average.

Average high45°
Average low30°
Average precipitation0.08 in
Chance of precipitation30%
Record high62° (2021)
Record low4° (1977)
Thu, 1044° / 29°0.11Climate normal
44 °Climate normal

Merrimac, Thursday, 10 December

Climate normal for this date — 60-year average.

Average high44°
Average low29°
Average precipitation0.11 in
Chance of precipitation22%
Record high66° (1965)
Record low-2° (1977)
Fri, 1144° / 29°0.1Climate normal
44 °Climate normal

Merrimac, Friday, 11 December

Climate normal for this date — 60-year average.

Average high44°
Average low29°
Average precipitation0.1 in
Chance of precipitation28%
Record high65° (1979)
Record low6° (1977)
Sat, 1244° / 31°0.07Climate normal
44 °Climate normal

Merrimac, Saturday, 12 December

Climate normal for this date — 60-year average.

Average high44°
Average low31°
Average precipitation0.07 in
Chance of precipitation28%
Record high70° (2015)
Record low2° (1962)
Sun, 1344° / 30°0.09Climate normal
44 °Climate normal

Merrimac, Sunday, 13 December

Climate normal for this date — 60-year average.

Average high44°
Average low30°
Average precipitation0.09 in
Chance of precipitation40%
Record high65° (1975)
Record low0° (1961)
Mon, 1445° / 30°0.13Climate normal
45 °Climate normal

Merrimac, Monday, 14 December

Climate normal for this date — 60-year average.

Average high45°
Average low30°
Average precipitation0.13 in
Chance of precipitation38%
Record high65° (1975)
Record low3° (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, IL 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, IL 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.