Monthly outlook for Helmar, IL: average high 62.1°, average low 46.3°. That is 0.7° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 12 October (82.1°), the coolest 18 October (28°).
62.1°/46.3°
Average high / low
+0.7°
Above normal
3 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
64.8°
61.8°
+1.7°
20 October – 29 October
57.6°
57.9°
-0.2°
30 October – 8 November
at normal
53.8°
—
October records over 66 years
87.6°3 October 2025All-time high
21.9°24 October 1981All-time low
Climate normals and records are computed from the nearest reference point — Boulder Hill (14 mi).
Sun, 1175° / 57°0
75 °
Helmar, Sunday, 11 October
Clear. High 75°, low 57°.
Pressure29.97 inHg
Wind3.6 mph S
Humidity60%
Visibility6.2 mi
Dew point56°
Mon, 1282° / 60°0
82 °
Helmar, Monday, 12 October
Mostly clear. High 82°, low 60°.
Pressure29.85 inHg
Wind10.2 mph SW
Humidity59%
Visibility6.2 mi
Dew point63°
Tue, 1379° / 64°0
79 °
Helmar, Tuesday, 13 October
Clear. High 79°, low 64°.
Pressure29.83 inHg
Wind10.6 mph W
Humidity67%
Visibility6.2 mi
Dew point66°
Wed, 1469° / 55°0.1
69 °
Helmar, Wednesday, 14 October
Light rain. High 69°, low 55°.
Pressure30.09 inHg
Wind10.8 mph NE
Humidity57%
Visibility—
Dew point52°
Thu, 1563° / 53°0
63 °
Helmar, Thursday, 15 October
Overcast. High 63°, low 53°.
Pressure30.30 inHg
Wind11.6 mph E
Humidity58%
Visibility—
Dew point47°
Fri, 1657° / 40°0.02
57 °
Helmar, Friday, 16 October
Light rain. High 57°, low 40°.
Pressure29.83 inHg
Wind26.1 mph W
Humidity51%
Visibility—
Dew point35°
Sat, 1742° / 33°0
42 °
Helmar, Saturday, 17 October
Overcast. High 42°, low 33°.
Pressure30.27 inHg
Wind21.4 mph W
Humidity54%
Visibility—
Dew point25°
Sun, 1846° / 28°0
46 °
Helmar, Sunday, 18 October
Clear. High 46°, low 28°.
Pressure30.50 inHg
Wind9.9 mph N
Humidity39%
Visibility—
Dew point19°
Mon, 1956° / 36°0
56 °
Helmar, Monday, 19 October
Overcast. High 56°, low 36°.
Pressure30.36 inHg
Wind14.5 mph S
Humidity38%
Visibility—
Dew point26°
Tue, 2060° / 41°0
60 °
Helmar, Tuesday, 20 October
Overcast. High 60°, low 41°.
Pressure30.27 inHg
Wind13.4 mph S
Humidity34%
Visibility—
Dew point28°
Wed, 2154° / 50°0.17
54 °
Helmar, Wednesday, 21 October
Rain. High 54°, low 50°.
Pressure29.97 inHg
Wind16.2 mph SW
Humidity66%
Visibility—
Dew point42°
Thu, 2264° / 43°0
64 °
Helmar, Thursday, 22 October
Clear. High 64°, low 43°.
Pressure30.09 inHg
Wind15.6 mph SW
Humidity47%
Visibility—
Dew point38°
Fri, 2356° / 43°0
56 °
Helmar, Friday, 23 October
Clear. High 56°, low 43°.
Pressure30.18 inHg
Wind11.5 mph NW
Humidity43%
Visibility—
Dew point31°
Sat, 2456° / 41°0
56 °
Helmar, Saturday, 24 October
Overcast. High 56°, low 41°.
Pressure30.21 inHg
Wind8 mph E
Humidity43%
Visibility—
Dew point30°
Sun, 2556° / 40°0.22
56 °
Helmar, Sunday, 25 October
Light rain. High 56°, low 40°.
Pressure29.71 inHg
Wind16.4 mph NW
Humidity91%
Visibility—
Dew point53°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2656° / 42°0.1
56 °
Helmar, Monday, 26 October
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.1 in
Chance of precipitation27%
Record high79° (1963)
Record low23° (1962)
Tue, 2756° / 42°0.09
56 °
Helmar, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.09 in
Chance of precipitation30%
Record high75° (2014)
Record low29° (1980)
Wed, 2856° / 41°0.05
56 °
Helmar, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.05 in
Chance of precipitation20%
Record high74° (1999)
Record low25° (1976)
Thu, 2956° / 41°0.06
56 °
Helmar, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.06 in
Chance of precipitation20%
Record high79° (2024)
Record low24° (1980)
Fri, 3058° / 42°0.11
58 °
Helmar, Friday, 30 October
Climate normal for this date — 60-year average.
Average high58°
Average low42°
Average precipitation0.11 in
Chance of precipitation27%
Record high78° (1971)
Record low23° (1988)
Sat, 3156° / 43°0.13
56 °
Helmar, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high56°
Average low43°
Average precipitation0.13 in
Chance of precipitation37%
Record high74° (1974)
Record low27° (2019)
Sun, 0155° / 41°0.17
55 °
Helmar, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.17 in
Chance of precipitation35%
Record high74° (2016)
Record low17° (2019)
Mon, 0254° / 40°0.11
54 °
Helmar, Monday, 2 November
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.11 in
Chance of precipitation35%
Record high75° (1961)
Record low23° (1991)
Tue, 0353° / 38°0.07
53 °
Helmar, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.07 in
Chance of precipitation27%
Record high73° (1987)
Record low17° (1991)
Wed, 0453° / 40°0.09
53 °
Helmar, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.09 in
Chance of precipitation23%
Record high71° (2015)
Record low16° (1991)
Thu, 0553° / 39°0.11
53 °
Helmar, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.11 in
Chance of precipitation28%
Record high75° (1978)
Record low18° (1991)
Fri, 0653° / 37°0.07
53 °
Helmar, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.07 in
Chance of precipitation27%
Record high72° (1975)
Record low23° (1991)
Sat, 0752° / 37°0.05
52 °
Helmar, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.05 in
Chance of precipitation20%
Record high69° (2020)
Record low16° (1991)
Sun, 0851° / 37°0.06
51 °
Helmar, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.06 in
Chance of precipitation20%
Record high74° (2020)
Record low12° (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 Helmar, 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 Helmar, 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.