Monthly outlook for Louisville, CO: average high 89.7°, average low 65°. That is 4.6° above the climate normal for August. Precipitation is expected on 8 days (about 1.6 inches), against a normal of 8 days and 1.5 inches. The warmest day looks like 11 August (98.8°), the coolest 14 August (60.7°).
89.7°/65°
Average high / low
+4.6°
Above normal
8 / 8
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
89.8°
81.5°
+4.6°
19 August – 28 August
89.4°
81.2°
+4.6°
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 (7 mi).
Mon, 1094° / 63°0.01
94 °
Louisville, Monday, 10 August
Light rain. High 94°, low 63°.
Pressure29.77 inHg
Wind7.9 mph E
Humidity13%
Visibility6.2 mi
Dew point37°
Tue, 1199° / 71°0.02
99 °
Louisville, Tuesday, 11 August
Light rain. High 99°, low 71°.
Pressure29.77 inHg
Wind9.6 mph E
Humidity13%
Visibility6.2 mi
Dew point37°
Wed, 1298° / 65°0.49
98 °
Louisville, Wednesday, 12 August
Rain. High 98°, low 65°.
Pressure29.77 inHg
Wind4.3 mph E
Humidity16%
Visibility6.2 mi
Dew point38°
Thu, 1380° / 63°0.13
80 °
Louisville, Thursday, 13 August
Light rain. High 80°, low 63°.
Pressure29.80 inHg
Wind10.2 mph SW
Humidity45%
Visibility—
Dew point53°
Fri, 1480° / 61°0.09
80 °
Louisville, Friday, 14 August
Light rain. High 80°, low 61°.
Pressure29.94 inHg
Wind6.7 mph NE
Humidity60%
Visibility—
Dew point57°
Sat, 1586° / 63°0.3
86 °
Louisville, Saturday, 15 August
Rain. High 86°, low 63°.
Pressure30.03 inHg
Wind6.1 mph W
Humidity39%
Visibility—
Dew point51°
Sun, 1686° / 61°0.02
86 °
Louisville, Sunday, 16 August
Light rain. High 86°, low 61°.
Pressure30.09 inHg
Wind10.8 mph S
Humidity45%
Visibility—
Dew point53°
Mon, 1789° / 66°0.15
89 °
Louisville, Monday, 17 August
Light rain. High 89°, low 66°.
Pressure29.91 inHg
Wind16.6 mph SW
Humidity21%
Visibility—
Dew point42°
Tue, 1890° / 67°0.01
90 °
Louisville, Tuesday, 18 August
Light rain. High 90°, low 67°.
Pressure29.88 inHg
Wind18.3 mph W
Humidity24%
Visibility—
Dew point43°
Wed, 1992° / 66°0.07
92 °
Louisville, Wednesday, 19 August
Light rain. High 92°, low 66°.
Pressure29.85 inHg
Wind12.9 mph W
Humidity20%
Visibility—
Dew point41°
Thu, 2094° / 65°0.06
94 °
Louisville, Thursday, 20 August
Light rain. High 94°, low 65°.
Pressure29.94 inHg
Wind11 mph NW
Humidity29%
Visibility—
Dew point46°
Fri, 2187° / 64°0.17
87 °
Louisville, Friday, 21 August
Rain. High 87°, low 64°.
Pressure29.85 inHg
Wind13.2 mph NW
Humidity28%
Visibility—
Dew point45°
Sat, 2285° / 66°0.01
85 °
Louisville, Saturday, 22 August
Light rain. High 85°, low 66°.
Pressure29.83 inHg
Wind10.1 mph NW
Humidity24%
Visibility—
Dew point42°
Sun, 2388° / 66°0.02
88 °
Louisville, Sunday, 23 August
Light rain. High 88°, low 66°.
Pressure29.83 inHg
Wind9.6 mph S
Humidity18%
Visibility—
Dew point37°
Mon, 2491° / 65°0
91 °
Louisville, Monday, 24 August
Mostly clear. High 91°, low 65°.
Pressure29.88 inHg
Wind15.3 mph S
Humidity22%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2581° / 56°0.07
81 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 °
Louisville, 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 Louisville, 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 Louisville, 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.