As of 11:57 PDT

Weather in Keystone, CA

80°

Keystone, Thursday, 8 October, 11:57

Clear. Feels like 84°. High 89°, low 71°.

Pressure29.85 inHg

Wind6.9 mph W

Humidity76%

Visibility6.2 mi

Dew point72°

See detailed hourly forecast

Monthly outlook for Keystone, CA: average high 80.4°, average low 69.1°. That is 2.9° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 1 days and 0.2 inches. The warmest day looks like 21 October (90.4°), the coolest 13 October (55.4°).

80.4°/69.1°

Average high / low

+2.9°

Above normal

1 / 1

Wet days / normal

0.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	77.6°	75.5°	+1.2°
18 October – 27 October	85.2°	74.3°	+6°
28 October – 6 November	at normal	72.3°	—

October records over 66 years

100.9°24 October 2017All-time high

39.6°30 October 1971All-time low

Climate normals and records are computed from the nearest reference point — West Carson (1 mi).

Fri, 0989° / 66°

89 °

Keystone, Friday, 9 October

Clear. High 89°, low 66°.

Pressure29.80 inHg

Wind3.6 mph W

Humidity57%

Visibility6.2 mi

Dew point65°

Sat, 1079° / 66°

79 °

Keystone, Saturday, 10 October

Overcast. High 79°, low 66°.

Pressure29.71 inHg

Wind3 mph W

Humidity61%

Visibility6.2 mi

Dew point63°

Sun, 1175° / 65°

75 °

Keystone, Sunday, 11 October

Clear. High 75°, low 65°.

Pressure29.53 inHg

Wind12.4 mph W

Humidity50%

Visibility6.2 mi

Dew point55°

Mon, 1268° / 60°

0.06

68 °

Keystone, Monday, 12 October

Light rain. High 68°, low 60°.

Pressure29.88 inHg

Wind8.2 mph W

Humidity49%

Visibility—

Dew point46°

Tue, 1370° / 55°

0.01

70 °

Keystone, Tuesday, 13 October

Light rain. High 70°, low 55°.

Pressure30.00 inHg

Wind7 mph W

Humidity49%

Visibility—

Dew point46°

Wed, 1472° / 65°

72 °

Keystone, Wednesday, 14 October

Partly cloudy. High 72°, low 65°.

Pressure29.97 inHg

Wind10.3 mph SW

Humidity58%

Visibility—

Dew point54°

Thu, 1573° / 68°

73 °

Keystone, Thursday, 15 October

Clear. High 73°, low 68°.

Pressure29.97 inHg

Wind8.3 mph SW

Humidity61%

Visibility—

Dew point56°

Fri, 1681° / 69°

81 °

Keystone, Friday, 16 October

Clear. High 81°, low 69°.

Pressure30.00 inHg

Wind9.1 mph W

Humidity37%

Visibility—

Dew point47°

Sat, 1781° / 72°

81 °

Keystone, Saturday, 17 October

Clear. High 81°, low 72°.

Pressure30.00 inHg

Wind10.6 mph W

Humidity21%

Visibility—

Dew point34°

Sun, 1883° / 73°

83 °

Keystone, Sunday, 18 October

Clear. High 83°, low 73°.

Pressure30.03 inHg

Wind11.4 mph W

Humidity19%

Visibility—

Dew point32°

Mon, 1984° / 74°

84 °

Keystone, Monday, 19 October

Clear. High 84°, low 74°.

Pressure30.00 inHg

Wind9.6 mph W

Humidity20%

Visibility—

Dew point35°

Tue, 2086° / 76°

86 °

Keystone, Tuesday, 20 October

Clear. High 86°, low 76°.

Pressure30.00 inHg

Wind11.3 mph W

Humidity19%

Visibility—

Dew point35°

Wed, 2190° / 77°

90 °

Keystone, Wednesday, 21 October

Clear. High 90°, low 77°.

Pressure29.94 inHg

Wind11.7 mph W

Humidity17%

Visibility—

Dew point34°

Thu, 2289° / 77°

89 °

Keystone, Thursday, 22 October

Clear. High 89°, low 77°.

Pressure29.88 inHg

Wind10.8 mph W

Humidity22%

Visibility—

Dew point41°

Fri, 2379° / 70°

79 °

Keystone, Friday, 23 October

Clear. High 79°, low 70°.

Pressure29.77 inHg

Wind11 mph W

Humidity54%

Visibility—

Dew point57°

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

Sat, 2475° / 58°

75 °

Keystone, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high75°

Average low58°

Average precipitation0 in

Chance of precipitation3%

Record high101° (2017)

Record low50° (1975)

Sun, 2574° / 58°

0.01

74 °

Keystone, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high74°

Average low58°

Average precipitation0.01 in

Chance of precipitation7%

Record high95° (2017)

Record low48° (1971)

Mon, 2674° / 57°

74 °

Keystone, Monday, 26 October

Climate normal for this date — 60-year average.

Average high74°

Average low57°

Average precipitation0 in

Chance of precipitation7%

Record high91° (1993)

Record low50° (1989)

Tue, 2773° / 57°

0.04

73 °

Keystone, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high73°

Average low57°

Average precipitation0.04 in

Chance of precipitation8%

Record high90° (1973)

Record low50° (2011)

Wed, 2873° / 56°

0.01

73 °

Keystone, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high73°

Average low56°

Average precipitation0.01 in

Chance of precipitation10%

Record high87° (1965)

Record low46° (1970)

Thu, 2973° / 56°

73 °

Keystone, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high73°

Average low56°

Average precipitation0 in

Chance of precipitation3%

Record high89° (2025)

Record low42° (1971)

Fri, 3072° / 56°

0.04

72 °

Keystone, Friday, 30 October

Climate normal for this date — 60-year average.

Average high72°

Average low56°

Average precipitation0.04 in

Chance of precipitation13%

Record high90° (1962)

Record low40° (1971)

Sat, 3173° / 55°

0.02

73 °

Keystone, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high73°

Average low55°

Average precipitation0.02 in

Chance of precipitation3%

Record high88° (1967)

Record low46° (1991)

Sun, 0173° / 54°

0.04

73 °

Keystone, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high73°

Average low54°

Average precipitation0.04 in

Chance of precipitation10%

Record high93° (1966)

Record low45° (1971)

Mon, 0273° / 55°

0.01

73 °

Keystone, Monday, 2 November

Climate normal for this date — 60-year average.

Average high73°

Average low55°

Average precipitation0.01 in

Chance of precipitation5%

Record high91° (1997)

Record low45° (1971)

Tue, 0373° / 54°

73 °

Keystone, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high73°

Average low54°

Average precipitation0 in

Chance of precipitation3%

Record high89° (2010)

Record low47° (2002)

Wed, 0472° / 54°

0.02

72 °

Keystone, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high72°

Average low54°

Average precipitation0.02 in

Chance of precipitation5%

Record high93° (1976)

Record low43° (1994)

Thu, 0571° / 54°

0.01

71 °

Keystone, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high71°

Average low54°

Average precipitation0.01 in

Chance of precipitation3%

Record high89° (2020)

Record low47° (2022)

Fri, 0670° / 55°

0.02

70 °

Keystone, Friday, 6 November

Climate normal for this date — 60-year average.

Average high70°

Average low55°

Average precipitation0.02 in

Chance of precipitation8%

Record high87° (2006)

Record low46° (2011)

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 Keystone, 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 Keystone, 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.