Monthly outlook for Arvada, CO: average high 58.8°, average low 42.7°. That is 0.8° below the climate normal for October. Precipitation is expected on 6 days (about 1.8 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 17 October (69.8°), the coolest 16 October (31.4°).
58.8°/42.7°
Average high / low
−0.8°
Below normal
6 / 4
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
61°
61.6°
-0.3°
23 October – 1 November
55.2°
56.1°
-0.5°
2 November – 11 November
at normal
52.1°
—
October records over 66 years
85.8°3 October 2025All-time high
-8°30 October 1993All-time low
Wed, 1455° / 49°0.67
55 °
Arvada, Wednesday, 14 October
Rain. High 55°, low 49°.
Pressure30.06 inHg
Wind5.7 mph NE
Humidity94%
Visibility2.1 mi
Dew point45°
Thu, 1554° / 35°0.36
54 °
Arvada, Thursday, 15 October
Rain. High 54°, low 35°.
Pressure30.50 inHg
Wind14.4 mph N
Humidity64%
Visibility4.9 mi
Dew point35°
Fri, 1658° / 31°0
58 °
Arvada, Friday, 16 October
Clear. High 58°, low 31°.
Pressure30.65 inHg
Wind4.8 mph SE
Humidity48%
Visibility6.2 mi
Dew point32°
Sat, 1770° / 34°0
70 °
Arvada, Saturday, 17 October
Clear. High 70°, low 34°.
Pressure30.12 inHg
Wind3.1 mph E
Humidity36%
Visibility6.2 mi
Dew point40°
Sun, 1866° / 44°0
66 °
Arvada, Sunday, 18 October
Overcast. High 66°, low 44°.
Pressure29.94 inHg
Wind3.4 mph E
Humidity30%
Visibility—
Dew point30°
Mon, 1965° / 48°0
65 °
Arvada, Monday, 19 October
Clear. High 65°, low 48°.
Pressure30.00 inHg
Wind6.1 mph W
Humidity31%
Visibility—
Dew point28°
Tue, 2067° / 51°0
67 °
Arvada, Tuesday, 20 October
Clear. High 67°, low 51°.
Pressure29.74 inHg
Wind5.9 mph NE
Humidity36%
Visibility—
Dew point34°
Wed, 2161° / 52°0.01
61 °
Arvada, Wednesday, 21 October
Light rain. High 61°, low 52°.
Pressure29.74 inHg
Wind11.2 mph N
Humidity48%
Visibility—
Dew point37°
Thu, 2253° / 44°0.07
53 °
Arvada, Thursday, 22 October
Light rain. High 53°, low 44°.
Pressure29.80 inHg
Wind8.2 mph NE
Humidity47%
Visibility—
Dew point31°
Fri, 2358° / 41°0.01
58 °
Arvada, Friday, 23 October
Light rain. High 58°, low 41°.
Pressure30.00 inHg
Wind12.3 mph N
Humidity25%
Visibility—
Dew point19°
Sat, 2447° / 36°0.43
47 °
Arvada, Saturday, 24 October
Snow. High 47°, low 36°.
Pressure30.47 inHg
Wind5.4 mph NE
Humidity72%
Visibility—
Dew point33°
Sun, 2558° / 39°0
58 °
Arvada, Sunday, 25 October
Clear. High 58°, low 39°.
Pressure30.36 inHg
Wind6.2 mph W
Humidity20%
Visibility—
Dew point12°
Mon, 2653° / 42°0.01
53 °
Arvada, Monday, 26 October
Light rain. High 53°, low 42°.
Pressure30.15 inHg
Wind10.6 mph N
Humidity37%
Visibility—
Dew point22°
Tue, 2763° / 46°0
63 °
Arvada, Tuesday, 27 October
Mostly clear. High 63°, low 46°.
Pressure29.80 inHg
Wind11.3 mph NW
Humidity26%
Visibility—
Dew point24°
Wed, 2852° / 39°0.2
52 °
Arvada, Wednesday, 28 October
Snow. High 52°, low 39°.
Pressure30.12 inHg
Wind9.9 mph NE
Humidity94%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2956° / 32°0.08
56 °
Arvada, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high56°
Average low32°
Average precipitation0.08 in
Chance of precipitation37%
Record high77° (2018)
Record low5° (1993)
Fri, 3053° / 30°0.07
53 °
Arvada, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low30°
Average precipitation0.07 in
Chance of precipitation33%
Record high74° (2016)
Record low-8° (1993)
Sat, 3152° / 30°0.06
52 °
Arvada, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low30°
Average precipitation0.06 in
Chance of precipitation30%
Record high74° (2016)
Record low4° (1991)
Sun, 0151° / 30°0.08
51 °
Arvada, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low30°
Average precipitation0.08 in
Chance of precipitation32%
Record high70° (1988)
Record low3° (1979)
Mon, 0251° / 28°0.08
51 °
Arvada, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low28°
Average precipitation0.08 in
Chance of precipitation28%
Record high81° (2025)
Record low4° (1991)
Tue, 0352° / 28°0.06
52 °
Arvada, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low28°
Average precipitation0.06 in
Chance of precipitation25%
Record high71° (2020)
Record low-12° (1991)
Wed, 0453° / 28°0.03
53 °
Arvada, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low28°
Average precipitation0.03 in
Chance of precipitation23%
Record high73° (2025)
Record low2° (2002)
Thu, 0553° / 29°0.04
53 °
Arvada, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low29°
Average precipitation0.04 in
Chance of precipitation17%
Record high72° (2023)
Record low1° (1967)
Fri, 0654° / 29°0.04
54 °
Arvada, Friday, 6 November
Climate normal for this date — 60-year average.
Average high54°
Average low29°
Average precipitation0.04 in
Chance of precipitation15%
Record high74° (2021)
Record low1° (1967)
Sat, 0754° / 29°0.03
54 °
Arvada, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high54°
Average low29°
Average precipitation0.03 in
Chance of precipitation17%
Record high73° (2021)
Record low6° (2000)
Sun, 0853° / 29°0.06
53 °
Arvada, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low29°
Average precipitation0.06 in
Chance of precipitation25%
Record high72° (1978)
Record low6° (1993)
Mon, 0951° / 28°0.09
51 °
Arvada, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low28°
Average precipitation0.09 in
Chance of precipitation28%
Record high70° (2016)
Record low8° (1993)
Tue, 1051° / 26°0.04
51 °
Arvada, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high51°
Average low26°
Average precipitation0.04 in
Chance of precipitation22%
Record high71° (2025)
Record low9° (1998)
Wed, 1149° / 26°0.05
49 °
Arvada, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high49°
Average low26°
Average precipitation0.05 in
Chance of precipitation25%
Record high70° (2025)
Record low5° (1998)
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 Arvada, 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 Arvada, 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.