Monthly outlook for Arvada, CO: average high 90.4°, average low 68.2°. That is 5.4° above the climate normal for August. Precipitation is expected on 6 days (about 2.1 inches), against a normal of 9 days and 1.7 inches. The warmest day looks like 11 August (98.7°), the coolest 10 August (62°).
90.4°/68.2°
Average high / low
+5.4°
Above normal
6 / 9
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
91.6°
80.8°
+6°
18 August – 27 August
88.4°
80.4°
+4.5°
28 August – 6 September
at normal
79.4°
—
August records over 66 years
97.9°4 August 2024All-time high
40.6°28 August 2004All-time low
Sun, 0994° / 65°0.01
94 °
Arvada, Sunday, 9 August
Light rain. High 94°, low 65°.
Pressure29.77 inHg
Wind5 mph SE
Humidity10%
Visibility6.2 mi
Dew point31°
Mon, 1097° / 62°0.02
97 °
Arvada, Monday, 10 August
Light rain. High 97°, low 62°.
Pressure29.83 inHg
Wind10.8 mph E
Humidity16%
Visibility6.2 mi
Dew point38°
Tue, 1199° / 74°0.02
99 °
Arvada, Tuesday, 11 August
Light rain. High 99°, low 74°.
Pressure29.80 inHg
Wind8.6 mph E
Humidity13%
Visibility6.2 mi
Dew point37°
Wed, 1298° / 73°0
98 °
Arvada, Wednesday, 12 August
Light rain. High 98°, low 73°.
Pressure29.77 inHg
Wind4.4 mph E
Humidity18%
Visibility6.2 mi
Dew point40°
Thu, 1387° / 69°0.3
87 °
Arvada, Thursday, 13 August
Rain. High 87°, low 69°.
Pressure29.91 inHg
Wind10.8 mph W
Humidity40%
Visibility—
Dew point52°
Fri, 1479° / 66°0.7
79 °
Arvada, Friday, 14 August
Heavy rain. High 79°, low 66°.
Pressure29.94 inHg
Wind12.5 mph W
Humidity44%
Visibility—
Dew point54°
Sat, 1586° / 67°0.17
86 °
Arvada, Saturday, 15 August
Rain. High 86°, low 67°.
Pressure30.00 inHg
Wind7.4 mph SE
Humidity33%
Visibility—
Dew point49°
Sun, 1693° / 70°0.06
93 °
Arvada, Sunday, 16 August
Light rain. High 93°, low 70°.
Pressure30.00 inHg
Wind18.4 mph SW
Humidity24%
Visibility—
Dew point45°
Mon, 1788° / 71°0.02
88 °
Arvada, Monday, 17 August
Light rain. High 88°, low 71°.
Pressure30.00 inHg
Wind15.8 mph W
Humidity26%
Visibility—
Dew point46°
Tue, 1890° / 69°0.03
90 °
Arvada, Tuesday, 18 August
Light rain. High 90°, low 69°.
Pressure30.00 inHg
Wind9.4 mph SW
Humidity26%
Visibility—
Dew point45°
Wed, 1990° / 69°0.26
90 °
Arvada, Wednesday, 19 August
Rain. High 90°, low 69°.
Pressure29.88 inHg
Wind9.8 mph W
Humidity24%
Visibility—
Dew point45°
Thu, 2087° / 67°0.48
87 °
Arvada, Thursday, 20 August
Rain. High 87°, low 67°.
Pressure30.00 inHg
Wind6.7 mph E
Humidity42%
Visibility—
Dew point53°
Fri, 2189° / 66°0
89 °
Arvada, Friday, 21 August
Clear. High 89°, low 66°.
Pressure29.94 inHg
Wind5 mph NE
Humidity33%
Visibility—
Dew point49°
Sat, 2287° / 72°0.01
87 °
Arvada, Saturday, 22 August
Light rain. High 87°, low 72°.
Pressure29.91 inHg
Wind10.5 mph NE
Humidity25%
Visibility—
Dew point46°
Sun, 2387° / 66°0.02
87 °
Arvada, Sunday, 23 August
Light rain. High 87°, low 66°.
Pressure30.00 inHg
Wind13.5 mph NE
Humidity37%
Visibility—
Dew point50°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2480° / 55°0.1
80 °
Arvada, Monday, 24 August
Climate normal for this date — 60-year average.
Average high80°
Average low55°
Average precipitation0.1 in
Chance of precipitation47%
Record high94° (2020)
Record low44° (1968)
Tue, 2580° / 55°0.09
80 °
Arvada, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low55°
Average precipitation0.09 in
Chance of precipitation53%
Record high94° (2020)
Record low47° (1972)
Wed, 2680° / 55°0.11
80 °
Arvada, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low55°
Average precipitation0.11 in
Chance of precipitation55%
Record high91° (2020)
Record low46° (1992)
Thu, 2780° / 56°0.09
80 °
Arvada, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low56°
Average precipitation0.09 in
Chance of precipitation50%
Record high93° (2020)
Record low42° (1992)
Fri, 2880° / 55°0.07
80 °
Arvada, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low55°
Average precipitation0.07 in
Chance of precipitation60%
Record high89° (2012)
Record low41° (2004)
Sat, 2980° / 54°0.06
80 °
Arvada, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low54°
Average precipitation0.06 in
Chance of precipitation43%
Record high91° (2012)
Record low45° (2004)
Sun, 3080° / 55°0.09
80 °
Arvada, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low55°
Average precipitation0.09 in
Chance of precipitation48%
Record high90° (2021)
Record low43° (1964)
Mon, 3179° / 54°0.07
79 °
Arvada, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low54°
Average precipitation0.07 in
Chance of precipitation47%
Record high92° (2023)
Record low44° (1968)
Tue, 0179° / 53°0.08
79 °
Arvada, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.08 in
Chance of precipitation40%
Record high93° (2023)
Record low42° (1965)
Wed, 0279° / 53°0.07
79 °
Arvada, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.07 in
Chance of precipitation45%
Record high95° (2019)
Record low40° (1974)
Thu, 0379° / 53°0.06
79 °
Arvada, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.06 in
Chance of precipitation40%
Record high91° (2017)
Record low35° (1961)
Fri, 0479° / 53°0.05
79 °
Arvada, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.05 in
Chance of precipitation23%
Record high91° (2022)
Record low36° (1961)
Sat, 0579° / 53°0.05
79 °
Arvada, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.05 in
Chance of precipitation33%
Record high96° (2020)
Record low42° (1968)
Sun, 0679° / 53°0.06
79 °
Arvada, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.06 in
Chance of precipitation38%
Record high95° (2020)
Record low43° (1968)
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.