As of 21:44 PDT

Weather in Mount Washington, CA

76°

Mount Washington, Saturday, 8 August, 21:44

Clear. Feels like 76°. High 97°, low 69°.

Pressure29.88 inHg

Wind4.2 mph S

Humidity63%

Visibility6.2 mi

Dew point63°

See detailed hourly forecast

Monthly outlook for Mount Washington, CA: average high 89.5°, average low 72.1°. That is 0.8° 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 8 August (97°), the coolest 8 August (69.1°).

89.5°/72.1°

Average high / low

+0.8°

Above normal

0 / 0

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	89.4°	88.4°	+0.6°
18 August – 27 August	89.5°	88.1°	+0.8°
28 August – 6 September	at normal	90°	—

August records over 66 years

106.9°15 August 2020All-time high

51.8°22 August 1968All-time low

Climate normals and records are computed from the nearest reference point — South Pasadena (4 mi).

Sun, 0996° / 69°

96 °

Mount Washington, Sunday, 9 August

Mostly clear. High 96°, low 69°.

Pressure29.85 inHg

Wind6.7 mph SW

Humidity30%

Visibility6.2 mi

Dew point56°

Mon, 1093° / 70°

93 °

Mount Washington, Monday, 10 August

Partly cloudy. High 93°, low 70°.

Pressure29.91 inHg

Wind7 mph SW

Humidity30%

Visibility6.2 mi

Dew point55°

Tue, 1189° / 75°

89 °

Mount Washington, Tuesday, 11 August

Overcast. High 89°, low 75°.

Pressure29.94 inHg

Wind7.1 mph SW

Humidity29%

Visibility6.2 mi

Dew point53°

Wed, 1287° / 72°

87 °

Mount Washington, Wednesday, 12 August

Clear. High 87°, low 72°.

Pressure29.88 inHg

Wind8.1 mph SW

Humidity33%

Visibility6.2 mi

Dew point55°

Thu, 1385° / 71°

85 °

Mount Washington, Thursday, 13 August

Overcast. High 85°, low 71°.

Pressure29.91 inHg

Wind9.3 mph S

Humidity46%

Visibility—

Dew point56°

Fri, 1483° / 71°

83 °

Mount Washington, Friday, 14 August

Overcast. High 83°, low 71°.

Pressure29.97 inHg

Wind8.7 mph SW

Humidity50%

Visibility—

Dew point56°

Sat, 1585° / 69°

85 °

Mount Washington, Saturday, 15 August

Clear. High 85°, low 69°.

Pressure30.03 inHg

Wind9.7 mph SW

Humidity40%

Visibility—

Dew point53°

Sun, 1688° / 72°

88 °

Mount Washington, Sunday, 16 August

Overcast. High 88°, low 72°.

Pressure30.03 inHg

Wind9.8 mph SW

Humidity35%

Visibility—

Dew point51°

Mon, 1791° / 75°

91 °

Mount Washington, Monday, 17 August

Clear. High 91°, low 75°.

Pressure30.00 inHg

Wind9.6 mph SW

Humidity28%

Visibility—

Dew point48°

Tue, 1891° / 76°

91 °

Mount Washington, Tuesday, 18 August

Partly cloudy. High 91°, low 76°.

Pressure29.94 inHg

Wind9.6 mph SW

Humidity31%

Visibility—

Dew point52°

Wed, 1994° / 76°

94 °

Mount Washington, Wednesday, 19 August

Overcast. High 94°, low 76°.

Pressure29.91 inHg

Wind8.9 mph SW

Humidity36%

Visibility—

Dew point56°

Thu, 2091° / 74°

91 °

Mount Washington, Thursday, 20 August

Clear. High 91°, low 74°.

Pressure29.91 inHg

Wind9.1 mph S

Humidity43%

Visibility—

Dew point58°

Fri, 2188° / 72°

88 °

Mount Washington, Friday, 21 August

Clear. High 88°, low 72°.

Pressure29.91 inHg

Wind9.2 mph S

Humidity47%

Visibility—

Dew point58°

Sat, 2286° / 71°

86 °

Mount Washington, Saturday, 22 August

Clear. High 86°, low 71°.

Pressure29.97 inHg

Wind9.2 mph SW

Humidity43%

Visibility—

Dew point54°

Sun, 2387° / 70°

87 °

Mount Washington, Sunday, 23 August

Clear. High 87°, low 70°.

Pressure29.94 inHg

Wind10 mph SW

Humidity42%

Visibility—

Dew point55°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2489° / 63°

89 °

Mount Washington, Monday, 24 August

Climate normal for this date — 60-year average.

Average high89°

Average low63°

Average precipitation0 in

Chance of precipitation0%

Record high104° (1985)

Record low54° (1978)

Tue, 2589° / 64°

89 °

Mount Washington, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high89°

Average low64°

Average precipitation0 in

Chance of precipitation0%

Record high106° (1985)

Record low55° (1978)

Wed, 2690° / 64°

90 °

Mount Washington, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high90°

Average low64°

Average precipitation0 in

Chance of precipitation0%

Record high105° (1981)

Record low54° (1990)

Thu, 2791° / 64°

91 °

Mount Washington, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high91°

Average low64°

Average precipitation0 in

Chance of precipitation0%

Record high105° (1981)

Record low53° (1973)

Fri, 2891° / 65°

91 °

Mount Washington, Friday, 28 August

Climate normal for this date — 60-year average.

Average high91°

Average low65°

Average precipitation0 in

Chance of precipitation0%

Record high105° (1981)

Record low55° (1973)

Sat, 2991° / 65°

91 °

Mount Washington, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high91°

Average low65°

Average precipitation0 in

Chance of precipitation0%

Record high106° (1967)

Record low55° (1964)

Sun, 3090° / 65°

90 °

Mount Washington, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high90°

Average low65°

Average precipitation0 in

Chance of precipitation0%

Record high107° (1967)

Record low55° (2010)

Mon, 3189° / 64°

89 °

Mount Washington, Monday, 31 August

Climate normal for this date — 60-year average.

Average high89°

Average low64°

Average precipitation0 in

Chance of precipitation3%

Record high105° (2017)

Record low55° (2010)

Tue, 0189° / 64°

89 °

Mount Washington, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high89°

Average low64°

Average precipitation0 in

Chance of precipitation2%

Record high105° (2002)

Record low54° (1973)

Wed, 0290° / 65°

0.02

90 °

Mount Washington, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high90°

Average low65°

Average precipitation0.02 in

Chance of precipitation3%

Record high107° (1982)

Record low52° (1964)

Thu, 0390° / 65°

0.01

90 °

Mount Washington, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high90°

Average low65°

Average precipitation0.01 in

Chance of precipitation5%

Record high110° (1988)

Record low55° (1999)

Fri, 0491° / 65°

91 °

Mount Washington, Friday, 4 September

Climate normal for this date — 60-year average.

Average high91°

Average low65°

Average precipitation0 in

Chance of precipitation2%

Record high110° (1988)

Record low56° (1999)

Sat, 0590° / 65°

0.02

90 °

Mount Washington, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high90°

Average low65°

Average precipitation0.02 in

Chance of precipitation3%

Record high112° (2020)

Record low56° (1970)

Sun, 0690° / 65°

0.01

90 °

Mount Washington, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high90°

Average low65°

Average precipitation0.01 in

Chance of precipitation2%

Record high112° (2024)

Record low55° (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 Mount Washington, 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 Mount Washington, 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.