Monthly outlook for Moss, CA: average high 109.6°, average low 86.1°. That is 1.7° above the climate normal for August. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 18 August (113°), the coolest 8 August (77°).
109.6°/86.1°
Average high / low
+1.7°
Above normal
1 / 2
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
108.2°
107°
+0.7°
18 August – 27 August
111.8°
105.9°
+3.3°
28 August – 6 September
at normal
105.7°
—
August records over 66 years
120.9°4 August 2021All-time high
64.2°23 August 1968All-time low
Climate normals and records are computed from the nearest reference point — Holtville (13 mi).
Sun, 09105° / 84°0
105 °
Moss, Sunday, 9 August
Clear. High 105°, low 84°.
Pressure29.74 inHg
Wind10 mph SE
Humidity24%
Visibility6.2 mi
Dew point65°
Mon, 10112° / 83°0
112 °
Moss, Monday, 10 August
Overcast. High 112°, low 83°.
Pressure29.80 inHg
Wind8.5 mph SE
Humidity29%
Visibility6.2 mi
Dew point67°
Tue, 11107° / 88°0.02
107 °
Moss, Tuesday, 11 August
Light rain. High 107°, low 88°.
Pressure29.85 inHg
Wind2.2 mph SE
Humidity31%
Visibility6.2 mi
Dew point66°
Wed, 12109° / 85°0.06
109 °
Moss, Wednesday, 12 August
Light rain. High 109°, low 85°.
Pressure29.77 inHg
Wind4.7 mph S
Humidity25%
Visibility6.2 mi
Dew point60°
Thu, 13108° / 85°0
108 °
Moss, Thursday, 13 August
Clear. High 108°, low 85°.
Pressure29.77 inHg
Wind16.6 mph SW
Humidity17%
Visibility—
Dew point45°
Fri, 14108° / 83°0
108 °
Moss, Friday, 14 August
Clear. High 108°, low 83°.
Pressure29.85 inHg
Wind13.4 mph W
Humidity18%
Visibility—
Dew point46°
Sat, 15110° / 86°0
110 °
Moss, Saturday, 15 August
Overcast. High 110°, low 86°.
Pressure29.88 inHg
Wind6.9 mph S
Humidity20%
Visibility—
Dew point51°
Sun, 16110° / 88°0
110 °
Moss, Sunday, 16 August
Overcast. High 110°, low 88°.
Pressure29.88 inHg
Wind18.7 mph SE
Humidity26%
Visibility—
Dew point60°
Mon, 17109° / 86°0
109 °
Moss, Monday, 17 August
Clear. High 109°, low 86°.
Pressure29.94 inHg
Wind11.9 mph SE
Humidity34%
Visibility—
Dew point65°
Tue, 18113° / 89°0
113 °
Moss, Tuesday, 18 August
Clear. High 113°, low 89°.
Pressure29.83 inHg
Wind5.3 mph SW
Humidity14%
Visibility—
Dew point45°
Wed, 19112° / 91°0
112 °
Moss, Wednesday, 19 August
Clear. High 112°, low 91°.
Pressure29.80 inHg
Wind10.4 mph E
Humidity22%
Visibility—
Dew point58°
Thu, 20112° / 90°0
112 °
Moss, Thursday, 20 August
Overcast. High 112°, low 90°.
Pressure29.80 inHg
Wind13.6 mph SE
Humidity30%
Visibility—
Dew point64°
Fri, 21112° / 87°0
112 °
Moss, Friday, 21 August
Overcast. High 112°, low 87°.
Pressure29.80 inHg
Wind9.2 mph SE
Humidity27%
Visibility—
Dew point60°
Sat, 22112° / 90°0
112 °
Moss, Saturday, 22 August
Overcast. High 112°, low 90°.
Pressure29.77 inHg
Wind15.5 mph S
Humidity18%
Visibility—
Dew point51°
Sun, 23109° / 86°0
109 °
Moss, Sunday, 23 August
Overcast. High 109°, low 86°.
Pressure29.80 inHg
Wind10.4 mph S
Humidity24%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 24106° / 81°0.02
106 °
Moss, Monday, 24 August
Climate normal for this date — 60-year average.
Average high106°
Average low81°
Average precipitation0.02 in
Chance of precipitation12%
Record high117° (1985)
Record low69° (2004)
Tue, 25105° / 81°0.04
105 °
Moss, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high105°
Average low81°
Average precipitation0.04 in
Chance of precipitation18%
Record high116° (2020)
Record low69° (1989)
Wed, 26106° / 81°0.02
106 °
Moss, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high106°
Average low81°
Average precipitation0.02 in
Chance of precipitation10%
Record high117° (2020)
Record low68° (1973)
Thu, 27107° / 80°0
107 °
Moss, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high107°
Average low80°
Average precipitation0 in
Chance of precipitation5%
Record high118° (2021)
Record low68° (1973)
Fri, 28107° / 80°0.01
107 °
Moss, Friday, 28 August
Climate normal for this date — 60-year average.
Average high107°
Average low80°
Average precipitation0.01 in
Chance of precipitation2%
Record high119° (2023)
Record low68° (1973)
Sat, 29107° / 81°0.02
107 °
Moss, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high107°
Average low81°
Average precipitation0.02 in
Chance of precipitation10%
Record high120° (2023)
Record low67° (2010)
Sun, 30107° / 81°0.01
107 °
Moss, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high107°
Average low81°
Average precipitation0.01 in
Chance of precipitation7%
Record high116° (2022)
Record low68° (2010)
Mon, 31106° / 80°0.01
106 °
Moss, Monday, 31 August
Climate normal for this date — 60-year average.
Average high106°
Average low80°
Average precipitation0.01 in
Chance of precipitation8%
Record high115° (2022)
Record low67° (1992)
Tue, 01106° / 80°0.01
106 °
Moss, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high106°
Average low80°
Average precipitation0.01 in
Chance of precipitation10%
Record high114° (2007)
Record low67° (1966)
Wed, 02105° / 80°0.01
105 °
Moss, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high105°
Average low80°
Average precipitation0.01 in
Chance of precipitation8%
Record high112° (2024)
Record low65° (2000)
Thu, 03105° / 80°0.01
105 °
Moss, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high105°
Average low80°
Average precipitation0.01 in
Chance of precipitation10%
Record high113° (2010)
Record low68° (2000)
Fri, 04105° / 80°0.04
105 °
Moss, Friday, 4 September
Climate normal for this date — 60-year average.
Average high105°
Average low80°
Average precipitation0.04 in
Chance of precipitation17%
Record high116° (2020)
Record low66° (1985)
Sat, 05105° / 80°0.01
105 °
Moss, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high105°
Average low80°
Average precipitation0.01 in
Chance of precipitation7%
Record high120° (2020)
Record low65° (2016)
Sun, 06104° / 80°0.02
104 °
Moss, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high104°
Average low80°
Average precipitation0.02 in
Chance of precipitation8%
Record high120° (2020)
Record low66° (1985)
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 Moss, 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 Moss, 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.