Monthly outlook for Allen, CO: average high 58.6°, average low 38.1°. That is 0.5° above the climate normal for October. Precipitation is expected on 8 days (about 1.0 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 11 October (67.6°), the coolest 17 October (29.3°).
58.6°/38.1°
Average high / low
+0.5°
Above normal
8 / 4
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
59.2°
58.9°
+0.1°
20 October – 29 October
57.6°
54.1°
+2°
30 October – 8 November
at normal
47.9°
—
October records over 66 years
81.3°1 October 2024All-time high
-6.3°25 October 1975All-time low
Climate normals and records are computed from the nearest reference point — Gypsum (11 mi).
Sun, 1168° / 47°0.19
68 °
Allen, Sunday, 11 October
Light rain. High 68°, low 47°.
Pressure29.74 inHg
Wind10.2 mph SW
Humidity51%
Visibility6.2 mi
Dew point42°
Mon, 1262° / 44°0.05
62 °
Allen, Monday, 12 October
Light rain. High 62°, low 44°.
Pressure29.91 inHg
Wind10.2 mph SW
Humidity52%
Visibility5.6 mi
Dew point38°
Tue, 1357° / 42°0.15
57 °
Allen, Tuesday, 13 October
Light rain. High 57°, low 42°.
Pressure29.91 inHg
Wind3.4 mph S
Humidity58%
Visibility5.8 mi
Dew point38°
Wed, 1454° / 40°0.15
54 °
Allen, Wednesday, 14 October
Snow. High 54°, low 40°.
Pressure29.88 inHg
Wind6.3 mph SW
Humidity51%
Visibility—
Dew point34°
Thu, 1552° / 34°0.11
52 °
Allen, Thursday, 15 October
Light rain. High 52°, low 34°.
Pressure30.24 inHg
Wind5 mph E
Humidity60%
Visibility—
Dew point32°
Fri, 1653° / 34°0.02
53 °
Allen, Friday, 16 October
Light rain. High 53°, low 34°.
Pressure30.27 inHg
Wind10.4 mph W
Humidity26%
Visibility—
Dew point15°
Sat, 1760° / 29°0
60 °
Allen, Saturday, 17 October
Clear. High 60°, low 29°.
Pressure30.39 inHg
Wind5.3 mph W
Humidity17%
Visibility—
Dew point5°
Sun, 1863° / 36°0
63 °
Allen, Sunday, 18 October
Clear. High 63°, low 36°.
Pressure30.21 inHg
Wind9.7 mph W
Humidity23%
Visibility—
Dew point17°
Mon, 1956° / 40°0
56 °
Allen, Monday, 19 October
Overcast. High 56°, low 40°.
Pressure30.12 inHg
Wind5 mph SW
Humidity31%
Visibility—
Dew point23°
Tue, 2063° / 38°0
63 °
Allen, Tuesday, 20 October
Clear. High 63°, low 38°.
Pressure30.03 inHg
Wind7.2 mph W
Humidity32%
Visibility—
Dew point26°
Wed, 2160° / 41°0.23
60 °
Allen, Wednesday, 21 October
Rain. High 60°, low 41°.
Pressure29.85 inHg
Wind16.7 mph W
Humidity37%
Visibility—
Dew point31°
Thu, 2252° / 30°0.05
52 °
Allen, Thursday, 22 October
Light rain. High 52°, low 30°.
Pressure30.24 inHg
Wind9.9 mph W
Humidity29%
Visibility—
Dew point13°
Fri, 2356° / 34°0
56 °
Allen, Friday, 23 October
Overcast. High 56°, low 34°.
Pressure30.06 inHg
Wind12.2 mph W
Humidity24%
Visibility—
Dew point16°
Sat, 2455° / 35°0
55 °
Allen, Saturday, 24 October
Overcast. High 55°, low 35°.
Pressure30.09 inHg
Wind7.7 mph W
Humidity38%
Visibility—
Dew point24°
Sun, 2560° / 37°0
60 °
Allen, Sunday, 25 October
Overcast. High 60°, low 37°.
Pressure29.74 inHg
Wind17.4 mph SW
Humidity31%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2653° / 31°0.07
53 °
Allen, Monday, 26 October
Climate normal for this date — 60-year average.
Average high53°
Average low31°
Average precipitation0.07 in
Chance of precipitation30%
Record high70° (2024)
Record low1° (1997)
Tue, 2753° / 30°0.05
53 °
Allen, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low30°
Average precipitation0.05 in
Chance of precipitation23%
Record high72° (2024)
Record low-4° (2020)
Wed, 2852° / 30°0.06
52 °
Allen, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low30°
Average precipitation0.06 in
Chance of precipitation30%
Record high67° (2016)
Record low-3° (2010)
Thu, 2950° / 29°0.07
50 °
Allen, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high50°
Average low29°
Average precipitation0.07 in
Chance of precipitation35%
Record high66° (1964)
Record low6° (1980)
Fri, 3048° / 28°0.07
48 °
Allen, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low28°
Average precipitation0.07 in
Chance of precipitation33%
Record high65° (2016)
Record low1° (2023)
Sat, 3148° / 27°0.07
48 °
Allen, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high48°
Average low27°
Average precipitation0.07 in
Chance of precipitation35%
Record high64° (2008)
Record low-5° (2019)
Sun, 0147° / 28°0.07
47 °
Allen, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.07 in
Chance of precipitation33%
Record high63° (2008)
Record low12° (1991)
Mon, 0248° / 26°0.07
48 °
Allen, Monday, 2 November
Climate normal for this date — 60-year average.
Average high48°
Average low26°
Average precipitation0.07 in
Chance of precipitation25%
Record high66° (2025)
Record low-3° (2004)
Tue, 0348° / 24°0.05
48 °
Allen, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high48°
Average low24°
Average precipitation0.05 in
Chance of precipitation25%
Record high62° (2016)
Record low-12° (1991)
Wed, 0448° / 26°0.04
48 °
Allen, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high48°
Average low26°
Average precipitation0.04 in
Chance of precipitation28%
Record high64° (1983)
Record low1° (1970)
Thu, 0548° / 25°0.06
48 °
Allen, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low25°
Average precipitation0.06 in
Chance of precipitation30%
Record high64° (2025)
Record low-5° (1961)
Fri, 0648° / 25°0.04
48 °
Allen, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low25°
Average precipitation0.04 in
Chance of precipitation27%
Record high63° (2020)
Record low-9° (1961)
Sat, 0748° / 23°0.02
48 °
Allen, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low23°
Average precipitation0.02 in
Chance of precipitation18%
Record high63° (1999)
Record low-6° (2000)
Sun, 0847° / 25°0.09
47 °
Allen, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low25°
Average precipitation0.09 in
Chance of precipitation33%
Record high61° (1978)
Record low-6° (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 Allen, 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 Allen, 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.