Monthly outlook for Rollinsville, CO: average high 76.5°, average low 53.2°. That is 2.7° below the climate normal for August. Precipitation is expected on 10 days (about 2.1 inches), against a normal of 8 days and 1.5 inches. The warmest day looks like 10 August (82.9°), the coolest 13 August (50.1°).
76.5°/53.2°
Average high / low
−2.7°
Below normal
10 / 8
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
76.6°
81.5°
-2.7°
19 August – 28 August
76.3°
81.2°
-2.7°
29 August – 7 September
at normal
79.9°
—
August records over 66 years
97.9°7 August 2025All-time high
40.5°28 August 2004All-time low
Climate normals and records are computed from the nearest reference point — Boulder (15 mi).
Mon, 1083° / 53°0
83 °
Rollinsville, Monday, 10 August
Light rain. High 83°, low 53°.
Pressure29.94 inHg
Wind3 mph N
Humidity20%
Visibility6.2 mi
Dew point36°
Tue, 1183° / 56°0.04
83 °
Rollinsville, Tuesday, 11 August
Light rain. High 83°, low 56°.
Pressure29.94 inHg
Wind6.3 mph NE
Humidity20%
Visibility6.2 mi
Dew point34°
Wed, 1279° / 55°0.22
79 °
Rollinsville, Wednesday, 12 August
Rain. High 79°, low 55°.
Pressure29.88 inHg
Wind11.9 mph E
Humidity23%
Visibility6.2 mi
Dew point37°
Thu, 1374° / 50°0.49
74 °
Rollinsville, Thursday, 13 August
Rain. High 74°, low 50°.
Pressure29.85 inHg
Wind7.3 mph W
Humidity36%
Visibility—
Dew point42°
Fri, 1469° / 52°0.19
69 °
Rollinsville, Friday, 14 August
Light rain. High 69°, low 52°.
Pressure29.97 inHg
Wind6.8 mph W
Humidity46%
Visibility—
Dew point45°
Sat, 1572° / 52°0.19
72 °
Rollinsville, Saturday, 15 August
Light rain. High 72°, low 52°.
Pressure30.12 inHg
Wind8.9 mph E
Humidity37%
Visibility—
Dew point42°
Sun, 1673° / 52°0.09
73 °
Rollinsville, Sunday, 16 August
Light rain. High 73°, low 52°.
Pressure30.12 inHg
Wind6.9 mph W
Humidity38%
Visibility—
Dew point43°
Mon, 1775° / 54°0.26
75 °
Rollinsville, Monday, 17 August
Rain. High 75°, low 54°.
Pressure30.09 inHg
Wind10 mph W
Humidity32%
Visibility—
Dew point40°
Tue, 1876° / 54°0.11
76 °
Rollinsville, Tuesday, 18 August
Light rain. High 76°, low 54°.
Pressure30.03 inHg
Wind9.5 mph W
Humidity35%
Visibility—
Dew point40°
Wed, 1977° / 53°0.33
77 °
Rollinsville, Wednesday, 19 August
Light rain. High 77°, low 53°.
Pressure30.03 inHg
Wind13.1 mph NW
Humidity30%
Visibility—
Dew point40°
Thu, 2078° / 53°0.1
78 °
Rollinsville, Thursday, 20 August
Light rain. High 78°, low 53°.
Pressure30.03 inHg
Wind9.5 mph W
Humidity28%
Visibility—
Dew point39°
Fri, 2179° / 54°0.09
79 °
Rollinsville, Friday, 21 August
Light rain. High 79°, low 54°.
Pressure29.94 inHg
Wind9.5 mph SW
Humidity26%
Visibility—
Dew point38°
Sat, 2273° / 52°0.02
73 °
Rollinsville, Saturday, 22 August
Light rain. High 73°, low 52°.
Pressure29.97 inHg
Wind10.3 mph W
Humidity30%
Visibility—
Dew point37°
Sun, 2375° / 50°0.01
75 °
Rollinsville, Sunday, 23 August
Light rain. High 75°, low 50°.
Pressure30.00 inHg
Wind9 mph W
Humidity27%
Visibility—
Dew point35°
Mon, 2475° / 52°0
75 °
Rollinsville, Monday, 24 August
Mostly clear. High 75°, low 52°.
Pressure30.00 inHg
Wind9.8 mph S
Humidity23%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2581° / 56°0.07
81 °
Rollinsville, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high81°
Average low56°
Average precipitation0.07 in
Chance of precipitation50%
Record high94° (2019)
Record low47° (1972)
Wed, 2681° / 56°0.08
81 °
Rollinsville, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low56°
Average precipitation0.08 in
Chance of precipitation48%
Record high91° (1994)
Record low48° (1992)
Thu, 2781° / 56°0.08
81 °
Rollinsville, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low56°
Average precipitation0.08 in
Chance of precipitation42%
Record high92° (2012)
Record low43° (1992)
Fri, 2881° / 55°0.07
81 °
Rollinsville, Friday, 28 August
Climate normal for this date — 60-year average.
Average high81°
Average low55°
Average precipitation0.07 in
Chance of precipitation57%
Record high90° (2013)
Record low40° (2004)
Sat, 2981° / 55°0.06
81 °
Rollinsville, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high81°
Average low55°
Average precipitation0.06 in
Chance of precipitation40%
Record high93° (2012)
Record low46° (2004)
Sun, 3081° / 55°0.08
81 °
Rollinsville, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low55°
Average precipitation0.08 in
Chance of precipitation40%
Record high91° (2005)
Record low44° (1964)
Mon, 3180° / 55°0.07
80 °
Rollinsville, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low55°
Average precipitation0.07 in
Chance of precipitation42%
Record high93° (2011)
Record low44° (1968)
Tue, 0180° / 54°0.08
80 °
Rollinsville, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low54°
Average precipitation0.08 in
Chance of precipitation37%
Record high94° (2019)
Record low42° (1965)
Wed, 0280° / 53°0.06
80 °
Rollinsville, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low53°
Average precipitation0.06 in
Chance of precipitation38%
Record high95° (2019)
Record low41° (1974)
Thu, 0380° / 53°0.05
80 °
Rollinsville, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low53°
Average precipitation0.05 in
Chance of precipitation30%
Record high92° (2017)
Record low37° (1961)
Fri, 0480° / 53°0.05
80 °
Rollinsville, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low53°
Average precipitation0.05 in
Chance of precipitation33%
Record high92° (1960)
Record low41° (1961)
Sat, 0580° / 53°0.05
80 °
Rollinsville, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low53°
Average precipitation0.05 in
Chance of precipitation25%
Record high94° (2020)
Record low44° (1962)
Sun, 0679° / 53°0.06
79 °
Rollinsville, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low53°
Average precipitation0.06 in
Chance of precipitation40%
Record high95° (2020)
Record low43° (1968)
Mon, 0778° / 53°0.07
78 °
Rollinsville, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low53°
Average precipitation0.07 in
Chance of precipitation33%
Record high93° (2022)
Record low43° (2010)
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 Rollinsville, 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 Rollinsville, 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.