Monthly outlook for Ilium, CO: average high 58°, average low 39.2°. That is 4.3° above the climate normal for October. Precipitation is expected on 6 days (about 1.5 inches), against a normal of 5 days and 1.1 inches. The warmest day looks like 8 October (70.3°), the coolest 14 October (28.9°).
58°/39.2°
Average high / low
+4.3°
Above normal
6 / 5
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
57.5°
51.4°
+3.4°
18 October – 27 October
59°
47.3°
+6.5°
28 October – 6 November
at normal
42.4°
—
October records over 66 years
69.1°1 October 2015All-time high
-14.3°28 October 1970All-time low
Climate normals and records are computed from the nearest reference point — Telluride (4 mi).
Fri, 0968° / 44°0.03
68 °
Ilium, Friday, 9 October
Light rain. High 68°, low 44°.
Pressure30.03 inHg
Wind6.6 mph SW
Humidity33%
Visibility6.2 mi
Dew point27°
Sat, 1059° / 43°0.17
59 °
Ilium, Saturday, 10 October
Rain. High 59°, low 43°.
Pressure29.94 inHg
Wind9.2 mph SW
Humidity53%
Visibility3.7 mi
Dew point37°
Sun, 1154° / 42°0.45
54 °
Ilium, Sunday, 11 October
Rain. High 54°, low 42°.
Pressure29.85 inHg
Wind11.2 mph S
Humidity58%
Visibility6.2 mi
Dew point38°
Mon, 1255° / 44°0.36
55 °
Ilium, Monday, 12 October
Rain. High 55°, low 44°.
Pressure29.97 inHg
Wind9.7 mph S
Humidity65%
Visibility6.2 mi
Dew point38°
Tue, 1350° / 38°0.35
50 °
Ilium, Tuesday, 13 October
Rain. High 50°, low 38°.
Pressure29.88 inHg
Wind11.9 mph S
Humidity54%
Visibility—
Dew point32°
Wed, 1448° / 29°0.06
48 °
Ilium, Wednesday, 14 October
Snow. High 48°, low 29°.
Pressure30.00 inHg
Wind6.5 mph S
Humidity73%
Visibility—
Dew point33°
Thu, 1555° / 31°0
55 °
Ilium, Thursday, 15 October
Clear. High 55°, low 31°.
Pressure29.97 inHg
Wind7.9 mph SE
Humidity40%
Visibility—
Dew point26°
Fri, 1658° / 37°0
58 °
Ilium, Friday, 16 October
Clear. High 58°, low 37°.
Pressure30.09 inHg
Wind8.8 mph SE
Humidity42%
Visibility—
Dew point32°
Sat, 1756° / 40°0
56 °
Ilium, Saturday, 17 October
Partly cloudy. High 56°, low 40°.
Pressure30.24 inHg
Wind8.3 mph S
Humidity53%
Visibility—
Dew point37°
Sun, 1856° / 41°0
56 °
Ilium, Sunday, 18 October
Partly cloudy. High 56°, low 41°.
Pressure30.18 inHg
Wind8.1 mph SE
Humidity49%
Visibility—
Dew point33°
Mon, 1957° / 40°0
57 °
Ilium, Monday, 19 October
Light rain. High 57°, low 40°.
Pressure30.12 inHg
Wind8.8 mph S
Humidity39%
Visibility—
Dew point29°
Tue, 2058° / 37°0
58 °
Ilium, Tuesday, 20 October
Clear. High 58°, low 37°.
Pressure30.15 inHg
Wind7.8 mph NW
Humidity21%
Visibility—
Dew point15°
Wed, 2161° / 38°0
61 °
Ilium, Wednesday, 21 October
Mostly clear. High 61°, low 38°.
Pressure30.18 inHg
Wind6.9 mph NW
Humidity15%
Visibility—
Dew point10°
Thu, 2261° / 40°0
61 °
Ilium, Thursday, 22 October
Mostly clear. High 61°, low 40°.
Pressure30.15 inHg
Wind7.8 mph W
Humidity22%
Visibility—
Dew point19°
Fri, 2361° / 43°0
61 °
Ilium, Friday, 23 October
Overcast. High 61°, low 43°.
Pressure30.12 inHg
Wind6.5 mph SE
Humidity32%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2446° / 24°0.06
46 °
Ilium, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high46°
Average low24°
Average precipitation0.06 in
Chance of precipitation32%
Record high61° (2014)
Record low-7° (1975)
Sun, 2547° / 24°0.08
47 °
Ilium, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high47°
Average low24°
Average precipitation0.08 in
Chance of precipitation35%
Record high61° (2014)
Record low-5° (1975)
Mon, 2645° / 22°0.09
45 °
Ilium, Monday, 26 October
Climate normal for this date — 60-year average.
Average high45°
Average low22°
Average precipitation0.09 in
Chance of precipitation32%
Record high60° (2024)
Record low-12° (1997)
Tue, 2745° / 22°0.06
45 °
Ilium, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high45°
Average low22°
Average precipitation0.06 in
Chance of precipitation23%
Record high62° (2024)
Record low-11° (2020)
Wed, 2845° / 23°0.09
45 °
Ilium, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high45°
Average low23°
Average precipitation0.09 in
Chance of precipitation28%
Record high58° (2016)
Record low-14° (1970)
Thu, 2943° / 21°0.11
43 °
Ilium, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high43°
Average low21°
Average precipitation0.11 in
Chance of precipitation43%
Record high59° (1964)
Record low-9° (2009)
Fri, 3042° / 19°0.07
42 °
Ilium, Friday, 30 October
Climate normal for this date — 60-year average.
Average high42°
Average low19°
Average precipitation0.07 in
Chance of precipitation35%
Record high57° (2016)
Record low-11° (2009)
Sat, 3142° / 20°0.09
42 °
Ilium, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high42°
Average low20°
Average precipitation0.09 in
Chance of precipitation37%
Record high56° (2008)
Record low-13° (1979)
Sun, 0141° / 20°0.06
41 °
Ilium, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high41°
Average low20°
Average precipitation0.06 in
Chance of precipitation30%
Record high55° (2008)
Record low-14° (1979)
Mon, 0242° / 19°0.06
42 °
Ilium, Monday, 2 November
Climate normal for this date — 60-year average.
Average high42°
Average low19°
Average precipitation0.06 in
Chance of precipitation28%
Record high58° (2020)
Record low-16° (2004)
Tue, 0342° / 17°0.07
42 °
Ilium, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high42°
Average low17°
Average precipitation0.07 in
Chance of precipitation25%
Record high59° (2025)
Record low-17° (1982)
Wed, 0442° / 19°0.03
42 °
Ilium, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high42°
Average low19°
Average precipitation0.03 in
Chance of precipitation25%
Record high56° (1983)
Record low-11° (1992)
Thu, 0542° / 19°0.05
42 °
Ilium, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high42°
Average low19°
Average precipitation0.05 in
Chance of precipitation23%
Record high58° (2020)
Record low-3° (1979)
Fri, 0642° / 18°0.05
42 °
Ilium, Friday, 6 November
Climate normal for this date — 60-year average.
Average high42°
Average low18°
Average precipitation0.05 in
Chance of precipitation22%
Record high55° (2010)
Record low-17° (2008)
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 Ilium, CO 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 Ilium, CO 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.