Monthly outlook for Jerome, IL: average high 72.7°, average low 52.6°. That is 4.4° above the climate normal for October. Precipitation is expected on 2 days (about 0.7 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 12 October (88.9°), the coolest 18 October (33.6°).
72.7°/52.6°
Average high / low
+4.4°
Above normal
2 / 4
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 October – 18 October
73.9°
66°
+4.4°
19 October – 28 October
70.8°
61.5°
+5.2°
29 October – 7 November
at normal
57.6°
—
October records over 66 years
89.4°7 October 2007All-time high
24.8°26 October 1962All-time low
Climate normals and records are computed from the nearest reference point — Springfield (1 mi).
Sat, 1079° / 56°0
79 °
Jerome, Saturday, 10 October
Overcast. High 79°, low 56°.
Pressure30.06 inHg
Wind6.6 mph SE
Humidity46%
Visibility6.2 mi
Dew point53°
Sun, 1183° / 53°0
83 °
Jerome, Sunday, 11 October
Clear. High 83°, low 53°.
Pressure29.94 inHg
Wind1.1 mph W
Humidity50%
Visibility6.2 mi
Dew point56°
Mon, 1289° / 66°0
89 °
Jerome, Monday, 12 October
Clear. High 89°, low 66°.
Pressure29.88 inHg
Wind11.9 mph SW
Humidity41%
Visibility6.2 mi
Dew point58°
Tue, 1389° / 74°0
89 °
Jerome, Tuesday, 13 October
Overcast. High 89°, low 74°.
Pressure29.85 inHg
Wind10 mph W
Humidity55%
Visibility6.2 mi
Dew point68°
Wed, 1471° / 66°0.26
71 °
Jerome, Wednesday, 14 October
Rain. High 71°, low 66°.
Pressure30.03 inHg
Wind12 mph NE
Humidity87%
Visibility—
Dew point65°
Thu, 1581° / 59°0.41
81 °
Jerome, Thursday, 15 October
Rain. High 81°, low 59°.
Pressure29.91 inHg
Wind19.2 mph SW
Humidity76%
Visibility—
Dew point63°
Fri, 1666° / 50°0
66 °
Jerome, Friday, 16 October
Light rain. High 66°, low 50°.
Pressure30.09 inHg
Wind21.1 mph W
Humidity36%
Visibility—
Dew point32°
Sat, 1745° / 39°0
45 °
Jerome, Saturday, 17 October
Overcast. High 45°, low 39°.
Pressure30.42 inHg
Wind19.8 mph W
Humidity48%
Visibility—
Dew point26°
Sun, 1853° / 34°0
53 °
Jerome, Sunday, 18 October
Clear. High 53°, low 34°.
Pressure30.50 inHg
Wind6 mph N
Humidity35%
Visibility—
Dew point22°
Mon, 1960° / 41°0
60 °
Jerome, Monday, 19 October
Overcast. High 60°, low 41°.
Pressure30.39 inHg
Wind9 mph S
Humidity33%
Visibility—
Dew point27°
Tue, 2066° / 44°0
66 °
Jerome, Tuesday, 20 October
Clear. High 66°, low 44°.
Pressure30.39 inHg
Wind7.1 mph SE
Humidity28%
Visibility—
Dew point28°
Wed, 2171° / 47°0
71 °
Jerome, Wednesday, 21 October
Clear. High 71°, low 47°.
Pressure30.30 inHg
Wind9.2 mph S
Humidity27%
Visibility—
Dew point30°
Thu, 2274° / 50°0
74 °
Jerome, Thursday, 22 October
Clear. High 74°, low 50°.
Pressure30.12 inHg
Wind9.9 mph W
Humidity31%
Visibility—
Dew point37°
Fri, 2376° / 53°0
76 °
Jerome, Friday, 23 October
Clear. High 76°, low 53°.
Pressure30.03 inHg
Wind8.2 mph S
Humidity33%
Visibility—
Dew point40°
Sat, 2478° / 55°0
78 °
Jerome, Saturday, 24 October
Mostly clear. High 78°, low 55°.
Pressure30.03 inHg
Wind12.8 mph SW
Humidity25%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2561° / 46°0.14
61 °
Jerome, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high61°
Average low46°
Average precipitation0.14 in
Chance of precipitation30%
Record high78° (1963)
Record low30° (2013)
Mon, 2660° / 45°0.14
60 °
Jerome, Monday, 26 October
Climate normal for this date — 60-year average.
Average high60°
Average low45°
Average precipitation0.14 in
Chance of precipitation33%
Record high82° (1963)
Record low25° (1962)
Tue, 2760° / 45°0.09
60 °
Jerome, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high60°
Average low45°
Average precipitation0.09 in
Chance of precipitation32%
Record high77° (1984)
Record low31° (2001)
Wed, 2859° / 44°0.05
59 °
Jerome, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.05 in
Chance of precipitation17%
Record high76° (1999)
Record low29° (1969)
Thu, 2960° / 44°0.08
60 °
Jerome, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high60°
Average low44°
Average precipitation0.08 in
Chance of precipitation28%
Record high79° (2004)
Record low27° (1980)
Fri, 3061° / 45°0.11
61 °
Jerome, Friday, 30 October
Climate normal for this date — 60-year average.
Average high61°
Average low45°
Average precipitation0.11 in
Chance of precipitation33%
Record high80° (1971)
Record low26° (1980)
Sat, 3160° / 46°0.17
60 °
Jerome, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high60°
Average low46°
Average precipitation0.17 in
Chance of precipitation42%
Record high77° (1968)
Record low28° (1993)
Sun, 0159° / 44°0.21
59 °
Jerome, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.21 in
Chance of precipitation37%
Record high78° (2016)
Record low26° (1993)
Mon, 0258° / 43°0.09
58 °
Jerome, Monday, 2 November
Climate normal for this date — 60-year average.
Average high58°
Average low43°
Average precipitation0.09 in
Chance of precipitation30%
Record high77° (1961)
Record low26° (1966)
Tue, 0356° / 41°0.12
56 °
Jerome, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.12 in
Chance of precipitation30%
Record high77° (1987)
Record low18° (1991)
Wed, 0456° / 43°0.11
56 °
Jerome, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high56°
Average low43°
Average precipitation0.11 in
Chance of precipitation25%
Record high76° (1978)
Record low17° (1991)
Thu, 0556° / 41°0.16
56 °
Jerome, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.16 in
Chance of precipitation28%
Record high77° (1978)
Record low20° (1991)
Fri, 0655° / 40°0.08
55 °
Jerome, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.08 in
Chance of precipitation32%
Record high72° (2023)
Record low26° (1982)
Sat, 0755° / 40°0.07
55 °
Jerome, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.07 in
Chance of precipitation20%
Record high71° (1980)
Record low18° (1991)
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 Jerome, 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 Jerome, 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.