Monthly outlook for Deer Park, CA: average high 87.5°, average low 53.7°. That is 1.8° above 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 11 August (97°), the coolest 13 August (50.2°).
87.5°/53.7°
Average high / low
+1.8°
Above normal
0 / 0
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
87.5°
85°
+1.4°
19 August – 28 August
87.5°
83.6°
+2.2°
29 August – 7 September
at normal
85.2°
—
August records over 66 years
106.5°18 August 2020All-time high
48.7°10 August 1960All-time low
Climate normals and records are computed from the nearest reference point — Santa Rosa (14 mi).
Mon, 1091° / 55°0
91 °
Deer Park, Monday, 10 August
Partly cloudy. High 91°, low 55°.
Pressure29.83 inHg
Wind5.4 mph S
Humidity17%
Visibility6.2 mi
Dew point42°
Tue, 1197° / 57°0
97 °
Deer Park, Tuesday, 11 August
Clear. High 97°, low 57°.
Pressure29.88 inHg
Wind5.5 mph S
Humidity19%
Visibility6.2 mi
Dew point43°
Wed, 1290° / 54°0
90 °
Deer Park, Wednesday, 12 August
Partly cloudy. High 90°, low 54°.
Pressure29.83 inHg
Wind6.6 mph S
Humidity26%
Visibility6.2 mi
Dew point46°
Thu, 1384° / 50°0
84 °
Deer Park, Thursday, 13 August
Partly cloudy. High 84°, low 50°.
Pressure29.83 inHg
Wind11.5 mph SW
Humidity30%
Visibility—
Dew point46°
Fri, 1487° / 52°0
87 °
Deer Park, Friday, 14 August
Clear. High 87°, low 52°.
Pressure29.88 inHg
Wind8 mph SW
Humidity27%
Visibility—
Dew point46°
Sat, 1589° / 52°0
89 °
Deer Park, Saturday, 15 August
Overcast. High 89°, low 52°.
Pressure29.94 inHg
Wind8.3 mph SW
Humidity22%
Visibility—
Dew point42°
Sun, 1687° / 54°0
87 °
Deer Park, Sunday, 16 August
Overcast. High 87°, low 54°.
Pressure30.03 inHg
Wind9.4 mph W
Humidity30%
Visibility—
Dew point49°
Mon, 1777° / 51°0
77 °
Deer Park, Monday, 17 August
Overcast. High 77°, low 51°.
Pressure30.06 inHg
Wind9.6 mph SW
Humidity36%
Visibility—
Dew point45°
Tue, 1881° / 53°0
81 °
Deer Park, Tuesday, 18 August
Overcast. High 81°, low 53°.
Pressure29.97 inHg
Wind10.6 mph SW
Humidity43%
Visibility—
Dew point54°
Wed, 1988° / 58°0
88 °
Deer Park, Wednesday, 19 August
Clear. High 88°, low 58°.
Pressure29.91 inHg
Wind9.8 mph SW
Humidity32%
Visibility—
Dew point51°
Thu, 2082° / 57°0
82 °
Deer Park, Thursday, 20 August
Overcast. High 82°, low 57°.
Pressure29.94 inHg
Wind8.6 mph SW
Humidity42%
Visibility—
Dew point54°
Fri, 2186° / 53°0
86 °
Deer Park, Friday, 21 August
Partly cloudy. High 86°, low 53°.
Pressure29.88 inHg
Wind10 mph SW
Humidity19%
Visibility—
Dew point36°
Sat, 2288° / 51°0
88 °
Deer Park, Saturday, 22 August
Overcast. High 88°, low 51°.
Pressure29.91 inHg
Wind7.6 mph SW
Humidity19%
Visibility—
Dew point37°
Sun, 2390° / 54°0
90 °
Deer Park, Sunday, 23 August
Clear. High 90°, low 54°.
Pressure29.85 inHg
Wind9.1 mph SW
Humidity19%
Visibility—
Dew point39°
Mon, 2491° / 52°0
91 °
Deer Park, Monday, 24 August
Clear. High 91°, low 52°.
Pressure29.80 inHg
Wind9.7 mph SW
Humidity15%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 57°0
83 °
Deer Park, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high101° (1988)
Record low51° (2021)
Wed, 2684° / 56°0
84 °
Deer Park, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low56°
Average precipitation0 in
Chance of precipitation0%
Record high100° (1988)
Record low50° (1966)
Thu, 2785° / 58°0
85 °
Deer Park, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high102° (2017)
Record low51° (1960)
Fri, 2885° / 58°0
85 °
Deer Park, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation2%
Record high101° (2021)
Record low52° (1985)
Sat, 2985° / 58°0
85 °
Deer Park, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low58°
Average precipitation0 in
Chance of precipitation2%
Record high100° (2009)
Record low50° (1980)
Sun, 3084° / 58°0
84 °
Deer Park, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low58°
Average precipitation0 in
Chance of precipitation3%
Record high99° (1996)
Record low51° (1971)
Mon, 3185° / 57°0.02
85 °
Deer Park, Monday, 31 August
Climate normal for this date — 60-year average.
Average high85°
Average low57°
Average precipitation0.02 in
Chance of precipitation3%
Record high96° (2017)
Record low51° (1970)
Tue, 0186° / 57°0
86 °
Deer Park, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high86°
Average low57°
Average precipitation0 in
Chance of precipitation2%
Record high107° (2017)
Record low51° (1964)
Wed, 0286° / 58°0
86 °
Deer Park, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high86°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high109° (2017)
Record low50° (1960)
Thu, 0385° / 57°0
85 °
Deer Park, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high85°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high100° (1988)
Record low49° (2000)
Fri, 0485° / 57°0
85 °
Deer Park, Friday, 4 September
Climate normal for this date — 60-year average.
Average high85°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high101° (2022)
Record low49° (1960)
Sat, 0586° / 58°0
86 °
Deer Park, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high86°
Average low58°
Average precipitation0 in
Chance of precipitation2%
Record high109° (2022)
Record low50° (2000)
Sun, 0685° / 57°0
85 °
Deer Park, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high85°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high116° (2022)
Record low51° (1980)
Mon, 0785° / 57°0.01
85 °
Deer Park, Monday, 7 September
Climate normal for this date — 60-year average.
Average high85°
Average low57°
Average precipitation0.01 in
Chance of precipitation3%
Record high111° (2020)
Record low51° (1987)
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 Deer Park, 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 Deer Park, 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.