Monthly outlook for Scotland, CA: average high 88.2°, average low 63.2°. That is 1.1° below the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 18 August (93.1°), the coolest 22 August (58.8°).
88.2°/63.2°
Average high / low
−1.1°
Below normal
0 / 0
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
87.6°
90.7°
-1.7°
18 August – 27 August
89.1°
90°
-0.5°
28 August – 6 September
at normal
91.6°
—
August records over 66 years
109.2°15 August 2020All-time high
50°22 August 1968All-time low
Climate normals and records are computed from the nearest reference point — Rancho Cucamonga (9 mi).
Sun, 0991° / 64°0
91 °
Scotland, Sunday, 9 August
Clear. High 91°, low 64°.
Pressure29.88 inHg
Wind10.2 mph S
Humidity16%
Visibility6.2 mi
Dew point42°
Mon, 1093° / 65°0
93 °
Scotland, Monday, 10 August
Mostly clear. High 93°, low 65°.
Pressure29.94 inHg
Wind10.6 mph S
Humidity21%
Visibility6.2 mi
Dew point46°
Tue, 1189° / 68°0
89 °
Scotland, Tuesday, 11 August
Overcast. High 89°, low 68°.
Pressure29.97 inHg
Wind8 mph S
Humidity23%
Visibility6.2 mi
Dew point45°
Wed, 1286° / 63°0.01
86 °
Scotland, Wednesday, 12 August
Light rain. High 86°, low 63°.
Pressure29.91 inHg
Wind10.7 mph S
Humidity29%
Visibility6.2 mi
Dew point48°
Thu, 1380° / 62°0
80 °
Scotland, Thursday, 13 August
Overcast. High 80°, low 62°.
Pressure29.91 inHg
Wind12.1 mph S
Humidity32%
Visibility—
Dew point43°
Fri, 1481° / 59°0
81 °
Scotland, Friday, 14 August
Overcast. High 81°, low 59°.
Pressure30.00 inHg
Wind9.8 mph S
Humidity36%
Visibility—
Dew point45°
Sat, 1588° / 60°0
88 °
Scotland, Saturday, 15 August
Clear. High 88°, low 60°.
Pressure30.03 inHg
Wind10.6 mph S
Humidity28%
Visibility—
Dew point44°
Sun, 1689° / 63°0
89 °
Scotland, Sunday, 16 August
Overcast. High 89°, low 63°.
Pressure30.06 inHg
Wind10.9 mph S
Humidity20%
Visibility—
Dew point37°
Mon, 1791° / 66°0
91 °
Scotland, Monday, 17 August
Mostly clear. High 91°, low 66°.
Pressure30.03 inHg
Wind10.8 mph S
Humidity18%
Visibility—
Dew point36°
Tue, 1893° / 69°0
93 °
Scotland, Tuesday, 18 August
Overcast. High 93°, low 69°.
Pressure29.97 inHg
Wind10.9 mph S
Humidity21%
Visibility—
Dew point41°
Wed, 1992° / 68°0
92 °
Scotland, Wednesday, 19 August
Overcast. High 92°, low 68°.
Pressure29.94 inHg
Wind11 mph S
Humidity24%
Visibility—
Dew point44°
Thu, 2089° / 65°0
89 °
Scotland, Thursday, 20 August
Clear. High 89°, low 65°.
Pressure29.94 inHg
Wind11.5 mph SW
Humidity27%
Visibility—
Dew point45°
Fri, 2187° / 61°0
87 °
Scotland, Friday, 21 August
Clear. High 87°, low 61°.
Pressure29.91 inHg
Wind11.2 mph S
Humidity23%
Visibility—
Dew point38°
Sat, 2286° / 59°0
86 °
Scotland, Saturday, 22 August
Mostly clear. High 86°, low 59°.
Pressure29.97 inHg
Wind11 mph SW
Humidity23%
Visibility—
Dew point38°
Sun, 2387° / 60°0
87 °
Scotland, Sunday, 23 August
Clear. High 87°, low 60°.
Pressure29.94 inHg
Wind10.8 mph SW
Humidity29%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2491° / 65°0
91 °
Scotland, Monday, 24 August
Climate normal for this date — 60-year average.
Average high91°
Average low65°
Average precipitation0 in
Chance of precipitation0%
Record high104° (2010)
Record low55° (1978)
Tue, 2591° / 66°0
91 °
Scotland, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0 in
Chance of precipitation2%
Record high105° (1985)
Record low57° (1960)
Wed, 2691° / 66°0
91 °
Scotland, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high103° (1981)
Record low55° (1990)
Thu, 2792° / 66°0
92 °
Scotland, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high92°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high105° (1981)
Record low54° (1973)
Fri, 2893° / 67°0
93 °
Scotland, Friday, 28 August
Climate normal for this date — 60-year average.
Average high93°
Average low67°
Average precipitation0 in
Chance of precipitation0%
Record high104° (1981)
Record low55° (1973)
Sat, 2993° / 67°0
93 °
Scotland, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high93°
Average low67°
Average precipitation0 in
Chance of precipitation2%
Record high104° (1998)
Record low55° (2010)
Sun, 3092° / 68°0
92 °
Scotland, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high92°
Average low68°
Average precipitation0 in
Chance of precipitation0%
Record high106° (2017)
Record low56° (2010)
Mon, 3191° / 66°0
91 °
Scotland, Monday, 31 August
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high106° (2022)
Record low55° (1964)
Tue, 0191° / 66°0
91 °
Scotland, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0 in
Chance of precipitation5%
Record high106° (2017)
Record low55° (1964)
Wed, 0291° / 66°0.02
91 °
Scotland, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.02 in
Chance of precipitation8%
Record high104° (1982)
Record low52° (1964)
Thu, 0391° / 66°0.01
91 °
Scotland, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.01 in
Chance of precipitation8%
Record high107° (2022)
Record low55° (2000)
Fri, 0491° / 67°0
91 °
Scotland, Friday, 4 September
Climate normal for this date — 60-year average.
Average high91°
Average low67°
Average precipitation0 in
Chance of precipitation2%
Record high106° (2022)
Record low55° (1985)
Sat, 0591° / 67°0.01
91 °
Scotland, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high91°
Average low67°
Average precipitation0.01 in
Chance of precipitation3%
Record high112° (2020)
Record low56° (1970)
Sun, 0691° / 66°0.02
91 °
Scotland, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high91°
Average low66°
Average precipitation0.02 in
Chance of precipitation3%
Record high111° (2020)
Record low56° (2000)
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 Scotland, CA 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 Scotland, CA 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.