Monthly outlook for New Castle, CO: average high 55.7°, average low 37.7°. That is 2.2° below the climate normal for October. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 21 October (66.1°), the coolest 25 October (24.8°).
55.7°/37.7°
Average high / low
−2.2°
Below normal
4 / 4
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
57.9°
61.8°
-2.2°
25 October – 3 November
52.1°
54.4°
-1.2°
4 November – 13 November
at normal
50.4°
—
October records over 66 years
85.5°4 October 2024All-time high
-13.4°25 October 1975All-time low
Climate normals and records are computed from the nearest reference point — Silt (7 mi).
Fri, 1663° / 33°0
63 °
New Castle, Friday, 16 October
Clear. High 63°, low 33°.
Pressure30.59 inHg
Wind4.3 mph SW
Humidity45%
Visibility6.2 mi
Dew point23°
Sat, 1764° / 40°0
64 °
New Castle, Saturday, 17 October
Clear. High 64°, low 40°.
Pressure30.39 inHg
Wind2.9 mph SW
Humidity35%
Visibility6.2 mi
Dew point23°
Sun, 1864° / 43°0.01
64 °
New Castle, Sunday, 18 October
Light rain. High 64°, low 43°.
Pressure30.15 inHg
Wind2.9 mph SW
Humidity35%
Visibility6.2 mi
Dew point26°
Mon, 1960° / 45°0.01
60 °
New Castle, Monday, 19 October
Light rain. High 60°, low 45°.
Pressure30.12 inHg
Wind5.6 mph NE
Humidity47%
Visibility—
Dew point37°
Tue, 2065° / 45°0.01
65 °
New Castle, Tuesday, 20 October
Light rain. High 65°, low 45°.
Pressure29.97 inHg
Wind7.4 mph W
Humidity39%
Visibility—
Dew point35°
Wed, 2166° / 48°0.01
66 °
New Castle, Wednesday, 21 October
Light rain. High 66°, low 48°.
Pressure29.80 inHg
Wind5.9 mph SW
Humidity39%
Visibility—
Dew point37°
Thu, 2254° / 43°0.3
54 °
New Castle, Thursday, 22 October
Rain. High 54°, low 43°.
Pressure29.80 inHg
Wind15 mph W
Humidity41%
Visibility—
Dew point28°
Fri, 2346° / 34°0.3
46 °
New Castle, Friday, 23 October
Snow. High 46°, low 34°.
Pressure30.03 inHg
Wind17.8 mph W
Humidity63%
Visibility—
Dew point33°
Sat, 2438° / 29°0.08
38 °
New Castle, Saturday, 24 October
Light snow. High 38°, low 29°.
Pressure30.42 inHg
Wind11.9 mph NW
Humidity63%
Visibility—
Dew point25°
Sun, 2542° / 25°0
42 °
New Castle, Sunday, 25 October
Clear. High 42°, low 25°.
Pressure30.65 inHg
Wind4.6 mph E
Humidity43%
Visibility—
Dew point16°
Mon, 2647° / 30°0
47 °
New Castle, Monday, 26 October
Overcast. High 47°, low 30°.
Pressure30.27 inHg
Wind4.7 mph E
Humidity39%
Visibility—
Dew point18°
Tue, 2750° / 31°0
50 °
New Castle, Tuesday, 27 October
Mostly clear. High 50°, low 31°.
Pressure30.15 inHg
Wind5.3 mph E
Humidity47%
Visibility—
Dew point25°
Wed, 2856° / 37°0
56 °
New Castle, Wednesday, 28 October
Clear. High 56°, low 37°.
Pressure30.00 inHg
Wind3.9 mph W
Humidity47%
Visibility—
Dew point30°
Thu, 2960° / 39°0
60 °
New Castle, Thursday, 29 October
Overcast. High 60°, low 39°.
Pressure30.03 inHg
Wind4.9 mph E
Humidity43%
Visibility—
Dew point32°
Fri, 3057° / 43°0
57 °
New Castle, Friday, 30 October
Overcast. High 57°, low 43°.
Pressure29.88 inHg
Wind5.6 mph W
Humidity39%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3152° / 30°0.07
52 °
New Castle, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low30°
Average precipitation0.07 in
Chance of precipitation35%
Record high71° (2008)
Record low-5° (2019)
Sun, 0152° / 31°0.07
52 °
New Castle, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high52°
Average low31°
Average precipitation0.07 in
Chance of precipitation28%
Record high70° (2008)
Record low2° (1972)
Mon, 0252° / 29°0.07
52 °
New Castle, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low29°
Average precipitation0.07 in
Chance of precipitation22%
Record high68° (2008)
Record low-5° (2004)
Tue, 0352° / 28°0.09
52 °
New Castle, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low28°
Average precipitation0.09 in
Chance of precipitation20%
Record high68° (1978)
Record low-6° (1991)
Wed, 0452° / 28°0.04
52 °
New Castle, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low28°
Average precipitation0.04 in
Chance of precipitation22%
Record high67° (2001)
Record low3° (2004)
Thu, 0552° / 29°0.06
52 °
New Castle, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low29°
Average precipitation0.06 in
Chance of precipitation25%
Record high67° (2023)
Record low0° (1961)
Fri, 0653° / 29°0.03
53 °
New Castle, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low29°
Average precipitation0.03 in
Chance of precipitation25%
Record high67° (2023)
Record low-6° (1961)
Sat, 0753° / 28°0.03
53 °
New Castle, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low28°
Average precipitation0.03 in
Chance of precipitation18%
Record high69° (1999)
Record low-7° (2000)
Sun, 0851° / 29°0.08
51 °
New Castle, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low29°
Average precipitation0.08 in
Chance of precipitation28%
Record high66° (2012)
Record low-4° (2000)
Mon, 0949° / 28°0.13
49 °
New Castle, Monday, 9 November
Climate normal for this date — 60-year average.
Average high49°
Average low28°
Average precipitation0.13 in
Chance of precipitation38%
Record high66° (1980)
Record low-5° (1986)
Tue, 1049° / 26°0.06
49 °
New Castle, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high49°
Average low26°
Average precipitation0.06 in
Chance of precipitation35%
Record high68° (1980)
Record low-7° (2011)
Wed, 1149° / 26°0.07
49 °
New Castle, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high49°
Average low26°
Average precipitation0.07 in
Chance of precipitation30%
Record high67° (1980)
Record low-9° (2011)
Thu, 1248° / 25°0.08
48 °
New Castle, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low25°
Average precipitation0.08 in
Chance of precipitation27%
Record high66° (1999)
Record low-11° (2012)
Fri, 1348° / 25°0.06
48 °
New Castle, Friday, 13 November
Climate normal for this date — 60-year average.
Average high48°
Average low25°
Average precipitation0.06 in
Chance of precipitation28%
Record high65° (2025)
Record low-8° (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 New Castle, 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 New Castle, 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.