Monthly outlook for Guernewood Park, CA: average high 85.9°, average low 57.1°. That is 2.2° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.0 inches. The warmest day looks like 23 August (100°), the coolest 15 August (50.6°).
85.9°/57.1°
Average high / low
+2.2°
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
80.2°
82.6°
-1.3°
19 August – 28 August
95.3°
81.1°
+7.9°
29 August – 7 September
at normal
82.8°
—
August records over 66 years
108.3°18 August 2020All-time high
48°10 August 1960All-time low
Climate normals and records are computed from the nearest reference point — Forestville (7 mi).
Mon, 1081° / 53°0
81 °
Guernewood Park, Monday, 10 August
Clear. High 81°, low 53°.
Pressure29.85 inHg
Wind6 mph S
Humidity28%
Visibility6.2 mi
Dew point47°
Tue, 1184° / 51°0
84 °
Guernewood Park, Tuesday, 11 August
Clear. High 84°, low 51°.
Pressure29.91 inHg
Wind6 mph S
Humidity31%
Visibility6.2 mi
Dew point49°
Wed, 1278° / 51°0
78 °
Guernewood Park, Wednesday, 12 August
Clear. High 78°, low 51°.
Pressure29.83 inHg
Wind5.8 mph S
Humidity33%
Visibility6.2 mi
Dew point49°
Thu, 1374° / 52°0
74 °
Guernewood Park, Thursday, 13 August
Clear. High 74°, low 52°.
Pressure29.83 inHg
Wind11 mph S
Humidity48%
Visibility—
Dew point51°
Fri, 1473° / 52°0
73 °
Guernewood Park, Friday, 14 August
Clear. High 73°, low 52°.
Pressure29.94 inHg
Wind9.3 mph SW
Humidity48%
Visibility—
Dew point51°
Sat, 1575° / 51°0
75 °
Guernewood Park, Saturday, 15 August
Clear. High 75°, low 51°.
Pressure30.00 inHg
Wind9 mph SW
Humidity45%
Visibility—
Dew point50°
Sun, 1678° / 51°0
78 °
Guernewood Park, Sunday, 16 August
Overcast. High 78°, low 51°.
Pressure30.12 inHg
Wind4.4 mph S
Humidity58%
Visibility—
Dew point51°
Mon, 1785° / 56°0
85 °
Guernewood Park, Monday, 17 August
Partly cloudy. High 85°, low 56°.
Pressure30.06 inHg
Wind8.2 mph SW
Humidity31%
Visibility—
Dew point48°
Tue, 1889° / 57°0
89 °
Guernewood Park, Tuesday, 18 August
Clear. High 89°, low 57°.
Pressure30.00 inHg
Wind8 mph SW
Humidity26%
Visibility—
Dew point47°
Wed, 1994° / 62°0
94 °
Guernewood Park, Wednesday, 19 August
Overcast. High 94°, low 62°.
Pressure29.94 inHg
Wind8.2 mph SW
Humidity21%
Visibility—
Dew point45°
Thu, 2093° / 62°0
93 °
Guernewood Park, Thursday, 20 August
Overcast. High 93°, low 62°.
Pressure29.88 inHg
Wind7.2 mph SW
Humidity25%
Visibility—
Dew point49°
Fri, 2193° / 61°0
93 °
Guernewood Park, Friday, 21 August
Mostly clear. High 93°, low 61°.
Pressure29.83 inHg
Wind7.4 mph SW
Humidity23%
Visibility—
Dew point47°
Sat, 2297° / 60°0
97 °
Guernewood Park, Saturday, 22 August
Mostly clear. High 97°, low 60°.
Pressure29.85 inHg
Wind6.9 mph SW
Humidity19%
Visibility—
Dew point45°
Sun, 23100° / 67°0
100 °
Guernewood Park, Sunday, 23 August
Partly cloudy. High 100°, low 67°.
Pressure29.91 inHg
Wind8.4 mph SW
Humidity16%
Visibility—
Dew point43°
Mon, 2495° / 67°0
95 °
Guernewood Park, Monday, 24 August
Clear. High 95°, low 67°.
Pressure29.88 inHg
Wind8.8 mph SW
Humidity20%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 57°0
80 °
Guernewood Park, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low57°
Average precipitation0 in
Chance of precipitation2%
Record high99° (1988)
Record low50° (1966)
Wed, 2681° / 56°0
81 °
Guernewood Park, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low56°
Average precipitation0 in
Chance of precipitation0%
Record high99° (2017)
Record low50° (2021)
Thu, 2783° / 57°0
83 °
Guernewood Park, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high104° (2017)
Record low50° (1960)
Fri, 2883° / 58°0
83 °
Guernewood Park, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high101° (2021)
Record low53° (1985)
Sat, 2982° / 58°0
82 °
Guernewood Park, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high97° (2023)
Record low51° (1980)
Sun, 3082° / 58°0
82 °
Guernewood Park, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low58°
Average precipitation0 in
Chance of precipitation3%
Record high97° (2023)
Record low52° (1970)
Mon, 3183° / 57°0.02
83 °
Guernewood Park, Monday, 31 August
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0.02 in
Chance of precipitation3%
Record high99° (2019)
Record low49° (1970)
Tue, 0183° / 57°0
83 °
Guernewood Park, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0 in
Chance of precipitation2%
Record high109° (2017)
Record low51° (2022)
Wed, 0283° / 58°0
83 °
Guernewood Park, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high110° (2017)
Record low50° (1960)
Thu, 0383° / 57°0
83 °
Guernewood Park, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high99° (1988)
Record low49° (2000)
Fri, 0483° / 57°0
83 °
Guernewood Park, Friday, 4 September
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high103° (2022)
Record low48° (1960)
Sat, 0583° / 58°0
83 °
Guernewood Park, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high83°
Average low58°
Average precipitation0 in
Chance of precipitation2%
Record high110° (2022)
Record low49° (1965)
Sun, 0683° / 57°0
83 °
Guernewood Park, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0 in
Chance of precipitation0%
Record high118° (2022)
Record low51° (2024)
Mon, 0783° / 57°0.01
83 °
Guernewood Park, Monday, 7 September
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0.01 in
Chance of precipitation3%
Record high113° (2020)
Record low49° (2012)
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 Guernewood 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 Guernewood 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.