Monthly outlook for Mark West Springs, CA: average high 83.8°, average low 54.8°. That is 0.3° 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 11 August (90.6°), the coolest 17 August (52.3°).
83.8°/54.8°
Average high / low
−0.3°
Below 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
83.4°
85°
-0.9°
19 August – 28 August
84.5°
83.6°
+0.5°
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 (7 mi).
Mon, 1082° / 54°0
82 °
Mark West Springs, Monday, 10 August
Overcast. High 82°, low 54°.
Pressure29.83 inHg
Wind5.5 mph S
Humidity20%
Visibility6.2 mi
Dew point43°
Tue, 1191° / 56°0
91 °
Mark West Springs, Tuesday, 11 August
Clear. High 91°, low 56°.
Pressure29.88 inHg
Wind6.2 mph SW
Humidity22%
Visibility6.2 mi
Dew point44°
Wed, 1289° / 55°0
89 °
Mark West Springs, Wednesday, 12 August
Mostly clear. High 89°, low 55°.
Pressure29.80 inHg
Wind5.9 mph S
Humidity26%
Visibility6.2 mi
Dew point46°
Thu, 1381° / 53°0
81 °
Mark West Springs, Thursday, 13 August
Clear. High 81°, low 53°.
Pressure29.83 inHg
Wind9.8 mph SW
Humidity34%
Visibility—
Dew point47°
Fri, 1482° / 54°0
82 °
Mark West Springs, Friday, 14 August
Clear. High 82°, low 54°.
Pressure29.91 inHg
Wind9.9 mph SW
Humidity33%
Visibility—
Dew point47°
Sat, 1584° / 54°0
84 °
Mark West Springs, Saturday, 15 August
Overcast. High 84°, low 54°.
Pressure29.97 inHg
Wind10 mph SW
Humidity30%
Visibility—
Dew point46°
Sun, 1682° / 56°0
82 °
Mark West Springs, Sunday, 16 August
Partly cloudy. High 82°, low 56°.
Pressure30.03 inHg
Wind11 mph SW
Humidity35%
Visibility—
Dew point49°
Mon, 1776° / 52°0
76 °
Mark West Springs, Monday, 17 August
Overcast. High 76°, low 52°.
Pressure30.06 inHg
Wind8.7 mph SW
Humidity38%
Visibility—
Dew point46°
Tue, 1879° / 55°0
79 °
Mark West Springs, Tuesday, 18 August
Overcast. High 79°, low 55°.
Pressure30.00 inHg
Wind11 mph SW
Humidity48%
Visibility—
Dew point55°
Wed, 1985° / 59°0
85 °
Mark West Springs, Wednesday, 19 August
Clear. High 85°, low 59°.
Pressure29.91 inHg
Wind11.8 mph SW
Humidity37%
Visibility—
Dew point53°
Thu, 2084° / 58°0
84 °
Mark West Springs, Thursday, 20 August
Overcast. High 84°, low 58°.
Pressure29.91 inHg
Wind10.6 mph SW
Humidity37%
Visibility—
Dew point52°
Fri, 2182° / 55°0
82 °
Mark West Springs, Friday, 21 August
Partly cloudy. High 82°, low 55°.
Pressure29.91 inHg
Wind9.8 mph SW
Humidity26%
Visibility—
Dew point41°
Sat, 2285° / 53°0
85 °
Mark West Springs, Saturday, 22 August
Overcast. High 85°, low 53°.
Pressure29.91 inHg
Wind8 mph SW
Humidity23%
Visibility—
Dew point40°
Sun, 2387° / 56°0
87 °
Mark West Springs, Sunday, 23 August
Clear. High 87°, low 56°.
Pressure29.88 inHg
Wind10 mph SW
Humidity24%
Visibility—
Dew point43°
Mon, 2485° / 53°0
85 °
Mark West Springs, Monday, 24 August
Clear. High 85°, low 53°.
Pressure29.83 inHg
Wind9.8 mph SW
Humidity25%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 57°0
83 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 °
Mark West Springs, 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 Mark West Springs, 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 Mark West Springs, 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.