Monthly outlook for Norwalk, CA: average high 88.7°, average low 73.1°. That is 1.5° 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 9 August (95.8°), the coolest 8 August (70.7°).
88.7°/73.1°
Average high / low
+1.5°
Above 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
89.1°
86.3°
+1.5°
18 August – 27 August
88.1°
86.4°
+0.9°
28 August – 6 September
at normal
88.2°
—
August records over 66 years
106.7°18 August 2020All-time high
56.1°9 August 2010All-time low
Sun, 0996° / 71°0
96 °
Norwalk, Sunday, 9 August
Clear. High 96°, low 71°.
Pressure29.83 inHg
Wind8.2 mph SW
Humidity37%
Visibility6.2 mi
Dew point58°
Mon, 1090° / 72°0
90 °
Norwalk, Monday, 10 August
Overcast. High 90°, low 72°.
Pressure29.88 inHg
Wind7.8 mph SW
Humidity36%
Visibility6.2 mi
Dew point58°
Tue, 1188° / 75°0
88 °
Norwalk, Tuesday, 11 August
Overcast. High 88°, low 75°.
Pressure29.94 inHg
Wind8.3 mph SW
Humidity36%
Visibility6.2 mi
Dew point56°
Wed, 1287° / 74°0
87 °
Norwalk, Wednesday, 12 August
Partly cloudy. High 87°, low 74°.
Pressure29.88 inHg
Wind7.7 mph SW
Humidity38%
Visibility6.2 mi
Dew point56°
Thu, 1384° / 72°0
84 °
Norwalk, Thursday, 13 August
Overcast. High 84°, low 72°.
Pressure29.91 inHg
Wind11.3 mph SW
Humidity51%
Visibility—
Dew point58°
Fri, 1485° / 71°0
85 °
Norwalk, Friday, 14 August
Overcast. High 85°, low 71°.
Pressure29.97 inHg
Wind11.5 mph SW
Humidity51%
Visibility—
Dew point58°
Sat, 1587° / 72°0
87 °
Norwalk, Saturday, 15 August
Partly cloudy. High 87°, low 72°.
Pressure30.00 inHg
Wind11.8 mph SW
Humidity42%
Visibility—
Dew point55°
Sun, 1689° / 74°0
89 °
Norwalk, Sunday, 16 August
Partly cloudy. High 89°, low 74°.
Pressure29.97 inHg
Wind13.3 mph SW
Humidity39%
Visibility—
Dew point55°
Mon, 1790° / 74°0
90 °
Norwalk, Monday, 17 August
Partly cloudy. High 90°, low 74°.
Pressure30.03 inHg
Wind13.4 mph W
Humidity38%
Visibility—
Dew point53°
Tue, 1891° / 75°0
91 °
Norwalk, Tuesday, 18 August
Clear. High 91°, low 75°.
Pressure29.94 inHg
Wind12.1 mph SW
Humidity37%
Visibility—
Dew point55°
Wed, 1990° / 75°0
90 °
Norwalk, Wednesday, 19 August
Clear. High 90°, low 75°.
Pressure29.88 inHg
Wind10.2 mph SW
Humidity41%
Visibility—
Dew point57°
Thu, 2089° / 75°0
89 °
Norwalk, Thursday, 20 August
Mostly clear. High 89°, low 75°.
Pressure29.88 inHg
Wind11.3 mph SW
Humidity50%
Visibility—
Dew point62°
Fri, 2188° / 74°0
88 °
Norwalk, Friday, 21 August
Partly cloudy. High 88°, low 74°.
Pressure29.88 inHg
Wind10.8 mph SW
Humidity50%
Visibility—
Dew point61°
Sat, 2285° / 74°0
85 °
Norwalk, Saturday, 22 August
Overcast. High 85°, low 74°.
Pressure29.85 inHg
Wind9.5 mph SW
Humidity56%
Visibility—
Dew point63°
Sun, 2386° / 72°0
86 °
Norwalk, Sunday, 23 August
Clear. High 86°, low 72°.
Pressure29.88 inHg
Wind12.7 mph SW
Humidity55%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2487° / 64°0
87 °
Norwalk, Monday, 24 August
Climate normal for this date — 60-year average.
Average high87°
Average low64°
Average precipitation0 in
Chance of precipitation0%
Record high100° (1985)
Record low59° (2005)
Tue, 2587° / 64°0
87 °
Norwalk, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high87°
Average low64°
Average precipitation0 in
Chance of precipitation2%
Record high104° (1985)
Record low58° (1978)
Wed, 2688° / 65°0
88 °
Norwalk, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high88°
Average low65°
Average precipitation0 in
Chance of precipitation2%
Record high104° (1981)
Record low60° (1975)
Thu, 2789° / 65°0
89 °
Norwalk, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high89°
Average low65°
Average precipitation0 in
Chance of precipitation0%
Record high102° (1981)
Record low58° (1973)
Fri, 2889° / 65°0
89 °
Norwalk, Friday, 28 August
Climate normal for this date — 60-year average.
Average high89°
Average low65°
Average precipitation0 in
Chance of precipitation0%
Record high101° (1981)
Record low58° (2010)
Sat, 2989° / 65°0
89 °
Norwalk, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high89°
Average low65°
Average precipitation0 in
Chance of precipitation2%
Record high103° (1967)
Record low58° (2002)
Sun, 3088° / 65°0
88 °
Norwalk, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high88°
Average low65°
Average precipitation0 in
Chance of precipitation0%
Record high105° (1967)
Record low59° (2010)
Mon, 3187° / 65°0
87 °
Norwalk, Monday, 31 August
Climate normal for this date — 60-year average.
Average high87°
Average low65°
Average precipitation0 in
Chance of precipitation2%
Record high107° (2017)
Record low58° (1973)
Tue, 0187° / 65°0.02
87 °
Norwalk, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high87°
Average low65°
Average precipitation0.02 in
Chance of precipitation3%
Record high104° (2002)
Record low58° (1973)
Wed, 0288° / 65°0.04
88 °
Norwalk, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high88°
Average low65°
Average precipitation0.04 in
Chance of precipitation5%
Record high104° (1982)
Record low58° (1964)
Thu, 0388° / 65°0
88 °
Norwalk, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high88°
Average low65°
Average precipitation0 in
Chance of precipitation5%
Record high107° (1988)
Record low58° (1961)
Fri, 0489° / 65°0
89 °
Norwalk, Friday, 4 September
Climate normal for this date — 60-year average.
Average high89°
Average low65°
Average precipitation0 in
Chance of precipitation3%
Record high110° (1988)
Record low58° (1999)
Sat, 0589° / 65°0.01
89 °
Norwalk, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high89°
Average low65°
Average precipitation0.01 in
Chance of precipitation3%
Record high108° (2024)
Record low58° (1973)
Sun, 0688° / 65°0.01
88 °
Norwalk, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high88°
Average low65°
Average precipitation0.01 in
Chance of precipitation3%
Record high114° (2024)
Record low56° (1970)
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 Norwalk, 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 Norwalk, 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.