Monthly outlook for Lafayette, CO: average high 90°, average low 64.8°. That is 4.5° above the climate normal for August. Precipitation is expected on 9 days (about 2.7 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 11 August (98.9°), the coolest 16 August (61.2°).
90°/64.8°
Average high / low
+4.5°
Above normal
9 / 4
Wet days / normal
2.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
91.4°
82°
+5.2°
18 August – 27 August
87.7°
81.7°
+3.4°
28 August – 6 September
at normal
80.7°
—
August records over 66 years
99.3°4 August 2024All-time high
40.8°28 August 2004All-time low
Climate normals and records are computed from the nearest reference point — Westminster (8 mi).
Sun, 0994° / 66°0.05
94 °
Lafayette, Sunday, 9 August
Light rain. High 94°, low 66°.
Pressure29.77 inHg
Wind6.4 mph E
Humidity10%
Visibility6.2 mi
Dew point31°
Mon, 1097° / 62°0.11
97 °
Lafayette, Monday, 10 August
Rain. High 97°, low 62°.
Pressure29.80 inHg
Wind7.9 mph SE
Humidity16%
Visibility6.2 mi
Dew point40°
Tue, 1199° / 70°0
99 °
Lafayette, Tuesday, 11 August
Overcast. High 99°, low 70°.
Pressure29.80 inHg
Wind6.6 mph E
Humidity13%
Visibility6.2 mi
Dew point38°
Wed, 1299° / 70°0.01
99 °
Lafayette, Wednesday, 12 August
Light rain. High 99°, low 70°.
Pressure29.74 inHg
Wind4.6 mph NE
Humidity17%
Visibility6.2 mi
Dew point40°
Thu, 1391° / 63°0.74
91 °
Lafayette, Thursday, 13 August
Heavy rain. High 91°, low 63°.
Pressure29.80 inHg
Wind20.9 mph W
Humidity37%
Visibility—
Dew point52°
Fri, 1481° / 64°0.16
81 °
Lafayette, Friday, 14 August
Light rain. High 81°, low 64°.
Pressure29.97 inHg
Wind6.6 mph S
Humidity79%
Visibility—
Dew point60°
Sat, 1579° / 63°0.37
79 °
Lafayette, Saturday, 15 August
Rain. High 79°, low 63°.
Pressure30.09 inHg
Wind6.8 mph S
Humidity59%
Visibility—
Dew point58°
Sun, 1686° / 61°0.07
86 °
Lafayette, Sunday, 16 August
Light rain. High 86°, low 61°.
Pressure30.03 inHg
Wind8.3 mph SW
Humidity44%
Visibility—
Dew point53°
Mon, 1791° / 65°0.01
91 °
Lafayette, Monday, 17 August
Light rain. High 91°, low 65°.
Pressure29.97 inHg
Wind15.1 mph W
Humidity25%
Visibility—
Dew point44°
Tue, 1895° / 66°0
95 °
Lafayette, Tuesday, 18 August
Clear. High 95°, low 66°.
Pressure29.94 inHg
Wind10.1 mph SE
Humidity21%
Visibility—
Dew point42°
Wed, 1984° / 65°1.05
84 °
Lafayette, Wednesday, 19 August
Heavy rain. High 84°, low 65°.
Pressure30.00 inHg
Wind16.1 mph NW
Humidity40%
Visibility—
Dew point49°
Thu, 2080° / 64°0.06
80 °
Lafayette, Thursday, 20 August
Light rain. High 80°, low 64°.
Pressure29.94 inHg
Wind7.1 mph N
Humidity53%
Visibility—
Dew point55°
Fri, 2186° / 64°0.12
86 °
Lafayette, Friday, 21 August
Light rain. High 86°, low 64°.
Pressure29.74 inHg
Wind18.7 mph NW
Humidity29%
Visibility—
Dew point47°
Sat, 2291° / 63°0
91 °
Lafayette, Saturday, 22 August
Partly cloudy. High 91°, low 63°.
Pressure29.83 inHg
Wind10.5 mph SE
Humidity19%
Visibility—
Dew point37°
Sun, 2392° / 65°0
92 °
Lafayette, Sunday, 23 August
Overcast. High 92°, low 65°.
Pressure29.83 inHg
Wind8.2 mph SE
Humidity24%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 56°0.06
82 °
Lafayette, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low56°
Average precipitation0.06 in
Chance of precipitation20%
Record high96° (2020)
Record low44° (1968)
Tue, 2582° / 56°0.05
82 °
Lafayette, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low56°
Average precipitation0.05 in
Chance of precipitation18%
Record high96° (2020)
Record low47° (1972)
Wed, 2682° / 56°0.05
82 °
Lafayette, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low56°
Average precipitation0.05 in
Chance of precipitation27%
Record high93° (2020)
Record low48° (1992)
Thu, 2781° / 56°0.04
81 °
Lafayette, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low56°
Average precipitation0.04 in
Chance of precipitation18%
Record high94° (2020)
Record low42° (1992)
Fri, 2881° / 55°0.02
81 °
Lafayette, Friday, 28 August
Climate normal for this date — 60-year average.
Average high81°
Average low55°
Average precipitation0.02 in
Chance of precipitation20%
Record high90° (2024)
Record low41° (2004)
Sat, 2982° / 55°0.03
82 °
Lafayette, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low55°
Average precipitation0.03 in
Chance of precipitation15%
Record high92° (2012)
Record low46° (2004)
Sun, 3081° / 55°0.05
81 °
Lafayette, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low55°
Average precipitation0.05 in
Chance of precipitation22%
Record high92° (2021)
Record low44° (1964)
Mon, 3181° / 55°0.03
81 °
Lafayette, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low55°
Average precipitation0.03 in
Chance of precipitation15%
Record high93° (2011)
Record low44° (1968)
Tue, 0181° / 54°0.06
81 °
Lafayette, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low54°
Average precipitation0.06 in
Chance of precipitation23%
Record high95° (2023)
Record low43° (1965)
Wed, 0280° / 54°0.04
80 °
Lafayette, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low54°
Average precipitation0.04 in
Chance of precipitation22%
Record high97° (2019)
Record low41° (1974)
Thu, 0381° / 54°0.02
81 °
Lafayette, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low54°
Average precipitation0.02 in
Chance of precipitation15%
Record high92° (2017)
Record low36° (1961)
Fri, 0480° / 53°0.03
80 °
Lafayette, Friday, 4 September
Climate normal for this date — 60-year average.
Average high80°
Average low53°
Average precipitation0.03 in
Chance of precipitation15%
Record high93° (2022)
Record low40° (1961)
Sat, 0581° / 53°0.02
81 °
Lafayette, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low53°
Average precipitation0.02 in
Chance of precipitation17%
Record high96° (2020)
Record low43° (1968)
Sun, 0680° / 53°0.02
80 °
Lafayette, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low53°
Average precipitation0.02 in
Chance of precipitation15%
Record high97° (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 Lafayette, 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 Lafayette, 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.