Monthly outlook for Alden, IL: average high 60.1°, average low 45.9°. That is 2° above the climate normal for October. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 21 October (69.2°), the coolest 26 October (35.8°).
60.1°/45.9°
Average high / low
+2°
Above normal
4 / 5
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
61.6°
57.9°
+2.1°
24 October – 2 November
57.6°
54°
+2°
3 November – 12 November
at normal
48.6°
—
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 — Darien (14 mi).
Thu, 1562° / 56°0.64
62 °
Alden, Thursday, 15 October
Heavy rain. High 62°, low 56°.
Pressure30.03 inHg
Wind9.6 mph SE
Humidity95%
Visibility2.8 mi
Dew point56°
Fri, 1656° / 43°0.11
56 °
Alden, Friday, 16 October
Light rain. High 56°, low 43°.
Pressure30.06 inHg
Wind15.2 mph NW
Humidity80%
Visibility5.6 mi
Dew point45°
Sat, 1753° / 36°0
53 °
Alden, Saturday, 17 October
Clear. High 53°, low 36°.
Pressure30.53 inHg
Wind4.1 mph W
Humidity50%
Visibility6.2 mi
Dew point32°
Sun, 1859° / 41°0
59 °
Alden, Sunday, 18 October
Clear. High 59°, low 41°.
Pressure30.45 inHg
Wind13.6 mph SW
Humidity52%
Visibility6.2 mi
Dew point37°
Mon, 1961° / 40°0
61 °
Alden, Monday, 19 October
Clear. High 61°, low 40°.
Pressure30.42 inHg
Wind6.9 mph SW
Humidity51%
Visibility—
Dew point39°
Tue, 2066° / 45°0
66 °
Alden, Tuesday, 20 October
Partly cloudy. High 66°, low 45°.
Pressure30.33 inHg
Wind6.9 mph SE
Humidity46%
Visibility—
Dew point41°
Wed, 2169° / 51°0
69 °
Alden, Wednesday, 21 October
Clear. High 69°, low 51°.
Pressure30.21 inHg
Wind13.9 mph S
Humidity58%
Visibility—
Dew point51°
Thu, 2262° / 60°0.21
62 °
Alden, Thursday, 22 October
Light rain. High 62°, low 60°.
Pressure29.91 inHg
Wind15.6 mph S
Humidity88%
Visibility—
Dew point59°
Fri, 2365° / 57°0.02
65 °
Alden, Friday, 23 October
Light rain. High 65°, low 57°.
Pressure30.09 inHg
Wind8.7 mph SE
Humidity73%
Visibility—
Dew point55°
Sat, 2468° / 49°0.09
68 °
Alden, Saturday, 24 October
Light rain. High 68°, low 49°.
Pressure29.83 inHg
Wind23.6 mph SW
Humidity78%
Visibility—
Dew point60°
Sun, 2554° / 39°0
54 °
Alden, Sunday, 25 October
Clear. High 54°, low 39°.
Pressure30.30 inHg
Wind13.5 mph W
Humidity41%
Visibility—
Dew point29°
Mon, 2651° / 36°0
51 °
Alden, Monday, 26 October
Clear. High 51°, low 36°.
Pressure30.39 inHg
Wind9.8 mph W
Humidity39%
Visibility—
Dew point24°
Tue, 2756° / 38°0
56 °
Alden, Tuesday, 27 October
Overcast. High 56°, low 38°.
Pressure30.21 inHg
Wind17.9 mph SW
Humidity41%
Visibility—
Dew point29°
Wed, 2858° / 44°0
58 °
Alden, Wednesday, 28 October
Overcast. High 58°, low 44°.
Pressure30.03 inHg
Wind12.7 mph SW
Humidity43%
Visibility—
Dew point32°
Thu, 2960° / 44°0
60 °
Alden, Thursday, 29 October
Partly cloudy. High 60°, low 44°.
Pressure29.97 inHg
Wind13.1 mph SW
Humidity62%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3056° / 41°0.09
56 °
Alden, Friday, 30 October
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.09 in
Chance of precipitation32%
Record high74° (2024)
Record low21° (1988)
Sat, 3154° / 41°0.09
54 °
Alden, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.09 in
Chance of precipitation40%
Record high71° (1974)
Record low25° (2019)
Sun, 0153° / 40°0.16
53 °
Alden, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.16 in
Chance of precipitation43%
Record high71° (2000)
Record low19° (2019)
Mon, 0251° / 39°0.11
51 °
Alden, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.11 in
Chance of precipitation37%
Record high73° (1961)
Record low21° (1991)
Tue, 0351° / 38°0.06
51 °
Alden, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.06 in
Chance of precipitation27%
Record high70° (1964)
Record low16° (1991)
Wed, 0451° / 39°0.09
51 °
Alden, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.09 in
Chance of precipitation23%
Record high69° (2015)
Record low13° (1991)
Thu, 0550° / 37°0.11
50 °
Alden, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.11 in
Chance of precipitation28%
Record high69° (1978)
Record low18° (1991)
Fri, 0650° / 36°0.09
50 °
Alden, Friday, 6 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.09 in
Chance of precipitation32%
Record high69° (1975)
Record low19° (1991)
Sat, 0749° / 36°0.03
49 °
Alden, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.03 in
Chance of precipitation17%
Record high67° (2020)
Record low10° (1991)
Sun, 0849° / 36°0.04
49 °
Alden, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.04 in
Chance of precipitation17%
Record high70° (2020)
Record low13° (1991)
Mon, 0949° / 36°0.11
49 °
Alden, Monday, 9 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.11 in
Chance of precipitation30%
Record high72° (2020)
Record low18° (1991)
Tue, 1048° / 35°0.1
48 °
Alden, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.1 in
Chance of precipitation35%
Record high71° (2022)
Record low14° (2017)
Wed, 1145° / 32°0.06
45 °
Alden, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.06 in
Chance of precipitation25%
Record high68° (1964)
Record low12° (2019)
Thu, 1244° / 31°0.06
44 °
Alden, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.06 in
Chance of precipitation25%
Record high63° (1964)
Record low3° (2019)
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 Alden, 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 Alden, 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.