Monthly outlook for Porterfield, IL: average high 47.6°, average low 34°. That is 0.3° above the climate normal for November. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 4 days and 1.5 inches. The warmest day looks like 21 November (66.3°), the coolest 24 November (19.6°).
47.6°/34°
Average high / low
+0.3°
Above normal
4 / 4
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 November – 22 November
53.8°
48.5°
+3°
23 November – 2 December
37.3°
43.3°
-3.4°
3 December – 12 December
at normal
38.2°
—
November records over 66 years
77.4°1 November 2016All-time high
1.8°22 November 2015All-time low
Climate normals and records are computed from the nearest reference point — Toluca (6 mi).
Sat, 1447° / 31°0
47 °
Porterfield, Saturday, 14 November
Clear. High 47°, low 31°.
Pressure30.30 inHg
Wind5.6 mph NW
Humidity60%
Visibility6.2 mi
Dew point26°
Sun, 1548° / 31°0
48 °
Porterfield, Sunday, 15 November
Clear. High 48°, low 31°.
Pressure30.47 inHg
Wind1.9 mph W
Humidity55%
Visibility6.2 mi
Dew point30°
Mon, 1651° / 31°0
51 °
Porterfield, Monday, 16 November
Clear. High 51°, low 31°.
Pressure30.50 inHg
Wind5.9 mph SW
Humidity50%
Visibility6.2 mi
Dew point32°
Tue, 1754° / 34°0
54 °
Porterfield, Tuesday, 17 November
Clear. High 54°, low 34°.
Pressure30.47 inHg
Wind8.4 mph S
Humidity54%
Visibility6.2 mi
Dew point37°
Wed, 1857° / 38°0
57 °
Porterfield, Wednesday, 18 November
Overcast. High 57°, low 38°.
Pressure30.30 inHg
Wind12.5 mph S
Humidity52%
Visibility—
Dew point36°
Thu, 1960° / 49°0.07
60 °
Porterfield, Thursday, 19 November
Light rain. High 60°, low 49°.
Pressure30.24 inHg
Wind14 mph S
Humidity62%
Visibility—
Dew point46°
Fri, 2063° / 54°0
63 °
Porterfield, Friday, 20 November
Light rain. High 63°, low 54°.
Pressure30.24 inHg
Wind10.6 mph SE
Humidity71%
Visibility—
Dew point52°
Sat, 2166° / 56°0.03
66 °
Porterfield, Saturday, 21 November
Light rain. High 66°, low 56°.
Pressure29.88 inHg
Wind20.4 mph S
Humidity44%
Visibility—
Dew point42°
Sun, 2249° / 27°0.06
49 °
Porterfield, Sunday, 22 November
Snow. High 49°, low 27°.
Pressure30.03 inHg
Wind23.8 mph N
Humidity66%
Visibility—
Dew point24°
Mon, 2328° / 23°0.01
28 °
Porterfield, Monday, 23 November
Light snow. High 28°, low 23°.
Pressure30.21 inHg
Wind15.2 mph NW
Humidity43%
Visibility—
Dew point7°
Tue, 2429° / 20°0
29 °
Porterfield, Tuesday, 24 November
Clear. High 29°, low 20°.
Pressure30.33 inHg
Wind13.8 mph NW
Humidity44%
Visibility—
Dew point9°
Wed, 2537° / 24°0
37 °
Porterfield, Wednesday, 25 November
Overcast. High 37°, low 24°.
Pressure30.12 inHg
Wind18.3 mph SW
Humidity31%
Visibility—
Dew point6°
Thu, 2636° / 28°0
36 °
Porterfield, Thursday, 26 November
Overcast. High 36°, low 28°.
Pressure30.21 inHg
Wind11.6 mph SW
Humidity58%
Visibility—
Dew point21°
Fri, 2744° / 30°0.29
44 °
Porterfield, Friday, 27 November
Rain. High 44°, low 30°.
Pressure30.21 inHg
Wind21.6 mph SE
Humidity61%
Visibility—
Dew point24°
Sat, 2850° / 35°0.49
50 °
Porterfield, Saturday, 28 November
Snow. High 50°, low 35°.
Pressure29.50 inHg
Wind21.3 mph S
Humidity80%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2942° / 29°0.07
42 °
Porterfield, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.07 in
Chance of precipitation25%
Record high67° (1998)
Record low6° (1976)
Mon, 3042° / 29°0.09
42 °
Porterfield, Monday, 30 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.09 in
Chance of precipitation28%
Record high65° (1998)
Record low10° (1964)
Tue, 0140° / 28°0.14
40 °
Porterfield, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.14 in
Chance of precipitation35%
Record high64° (1970)
Record low10° (1985)
Wed, 0241° / 28°0.07
41 °
Porterfield, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high41°
Average low28°
Average precipitation0.07 in
Chance of precipitation27%
Record high70° (1982)
Record low5° (2006)
Thu, 0341° / 28°0.09
41 °
Porterfield, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high41°
Average low28°
Average precipitation0.09 in
Chance of precipitation33%
Record high70° (2012)
Record low4° (2006)
Fri, 0440° / 27°0.07
40 °
Porterfield, Friday, 4 December
Climate normal for this date — 60-year average.
Average high40°
Average low27°
Average precipitation0.07 in
Chance of precipitation25%
Record high69° (1998)
Record low-3° (1991)
Sat, 0540° / 26°0.07
40 °
Porterfield, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.07 in
Chance of precipitation27%
Record high67° (2001)
Record low-3° (2006)
Sun, 0638° / 25°0.06
38 °
Porterfield, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high38°
Average low25°
Average precipitation0.06 in
Chance of precipitation22%
Record high64° (1980)
Record low-7° (1964)
Mon, 0737° / 25°0.11
37 °
Porterfield, Monday, 7 December
Climate normal for this date — 60-year average.
Average high37°
Average low25°
Average precipitation0.11 in
Chance of precipitation28%
Record high58° (1980)
Record low-8° (1977)
Tue, 0837° / 25°0.06
37 °
Porterfield, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high37°
Average low25°
Average precipitation0.06 in
Chance of precipitation22%
Record high65° (1991)
Record low-6° (2006)
Wed, 0938° / 24°0.07
38 °
Porterfield, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high38°
Average low24°
Average precipitation0.07 in
Chance of precipitation35%
Record high54° (1990)
Record low-7° (1977)
Thu, 1037° / 23°0.09
37 °
Porterfield, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high37°
Average low23°
Average precipitation0.09 in
Chance of precipitation22%
Record high59° (2021)
Record low-11° (1977)
Fri, 1137° / 23°0.09
37 °
Porterfield, Friday, 11 December
Climate normal for this date — 60-year average.
Average high37°
Average low23°
Average precipitation0.09 in
Chance of precipitation30%
Record high60° (2021)
Record low-12° (1972)
Sat, 1237° / 24°0.07
37 °
Porterfield, Saturday, 12 December
Climate normal for this date — 60-year average.
Average high37°
Average low24°
Average precipitation0.07 in
Chance of precipitation25%
Record high65° (2015)
Record low-10° (2000)
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 Porterfield, 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 Porterfield, 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.