Monthly outlook for Arvada, CO: average high 67.2°, average low 51°. That is 3.3° above the climate normal for October. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 12 October (80.9°), the coolest 16 October (32.3°).
67.2°/51°
Average high / low
+3.3°
Above normal
3 / 4
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
66.7°
62.3°
+2.5°
21 October – 30 October
68°
57.8°
+5.7°
31 October – 9 November
at normal
52.5°
—
October records over 66 years
85.8°3 October 2025All-time high
-8°30 October 1993All-time low
Mon, 1281° / 59°0
81 °
Arvada, Monday, 12 October
Clear. High 81°, low 59°.
Pressure29.65 inHg
Wind3.9 mph S
Humidity19%
Visibility6.2 mi
Dew point31°
Tue, 1365° / 50°0.13
65 °
Arvada, Tuesday, 13 October
Rain. High 65°, low 50°.
Pressure29.83 inHg
Wind5.2 mph NE
Humidity54%
Visibility6.2 mi
Dew point45°
Wed, 1452° / 46°0.37
52 °
Arvada, Wednesday, 14 October
Rain. High 52°, low 46°.
Pressure30.06 inHg
Wind5.7 mph NE
Humidity94%
Visibility5.3 mi
Dew point45°
Thu, 1550° / 42°0.24
50 °
Arvada, Thursday, 15 October
Light rain. High 50°, low 42°.
Pressure30.36 inHg
Wind5.7 mph N
Humidity72%
Visibility6.2 mi
Dew point40°
Fri, 1656° / 32°0
56 °
Arvada, Friday, 16 October
Overcast. High 56°, low 32°.
Pressure30.65 inHg
Wind5.5 mph N
Humidity50%
Visibility—
Dew point29°
Sat, 1771° / 41°0
71 °
Arvada, Saturday, 17 October
Clear. High 71°, low 41°.
Pressure30.12 inHg
Wind5.3 mph W
Humidity23%
Visibility—
Dew point24°
Sun, 1870° / 53°0
70 °
Arvada, Sunday, 18 October
Clear. High 70°, low 53°.
Pressure30.03 inHg
Wind6.2 mph W
Humidity18%
Visibility—
Dew point21°
Mon, 1970° / 55°0
70 °
Arvada, Monday, 19 October
Clear. High 70°, low 55°.
Pressure30.00 inHg
Wind5.4 mph W
Humidity21%
Visibility—
Dew point24°
Tue, 2073° / 55°0
73 °
Arvada, Tuesday, 20 October
Clear. High 73°, low 55°.
Pressure29.80 inHg
Wind13.2 mph W
Humidity17%
Visibility—
Dew point21°
Wed, 2167° / 53°0
67 °
Arvada, Wednesday, 21 October
Clear. High 67°, low 53°.
Pressure29.97 inHg
Wind4 mph SW
Humidity24%
Visibility—
Dew point23°
Thu, 2269° / 54°0
69 °
Arvada, Thursday, 22 October
Mostly clear. High 69°, low 54°.
Pressure29.97 inHg
Wind6.2 mph E
Humidity20%
Visibility—
Dew point23°
Fri, 2370° / 55°0
70 °
Arvada, Friday, 23 October
Clear. High 70°, low 55°.
Pressure30.09 inHg
Wind6.3 mph N
Humidity25%
Visibility—
Dew point27°
Sat, 2473° / 56°0
73 °
Arvada, Saturday, 24 October
Clear. High 73°, low 56°.
Pressure30.03 inHg
Wind5.2 mph W
Humidity18%
Visibility—
Dew point22°
Sun, 2562° / 56°0
62 °
Arvada, Sunday, 25 October
Partly cloudy. High 62°, low 56°.
Pressure30.27 inHg
Wind8.4 mph NE
Humidity26%
Visibility—
Dew point24°
Mon, 2666° / 50°0
66 °
Arvada, Monday, 26 October
Clear. High 66°, low 50°.
Pressure30.03 inHg
Wind7.1 mph SE
Humidity19%
Visibility—
Dew point17°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2756° / 33°0.04
56 °
Arvada, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high56°
Average low33°
Average precipitation0.04 in
Chance of precipitation22%
Record high79° (2016)
Record low4° (2020)
Wed, 2857° / 32°0.06
57 °
Arvada, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high57°
Average low32°
Average precipitation0.06 in
Chance of precipitation20%
Record high80° (2024)
Record low7° (1976)
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)
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.