As of 21:39 PDT

Weather in Keystone, CA

71°

Keystone, Thursday, 8 October, 21:39

Clear. Feels like 72°. High 97°, low 71°.

Pressure29.80 inHg

Wind8.1 mph W

Humidity86%

Visibility6.2 mi

Dew point67°

See detailed hourly forecast

Monthly outlook for Keystone, CA: average high 80.3°, average low 68.2°. That is 2.9° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 1 days and 0.2 inches. The warmest day looks like 8 October (96.5°), the coolest 14 October (56.3°).

80.3°/68.2°

Average high / low

+2.9°

Above normal

1 / 1

Wet days / normal

0.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	79.6°	75.5°	+2.3°
18 October – 27 October	81.6°	74.3°	+4°
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, 0990° / 67°

90 °

Keystone, Friday, 9 October

Clear. High 90°, low 67°.

Pressure29.80 inHg

Wind3.6 mph W

Humidity53%

Visibility6.2 mi

Dew point63°

Sat, 1083° / 66°

83 °

Keystone, Saturday, 10 October

Partly cloudy. High 83°, low 66°.

Pressure29.65 inHg

Wind1 mph SW

Humidity47%

Visibility6.2 mi

Dew point60°

Sun, 1171° / 64°

0.16

71 °

Keystone, Sunday, 11 October

Rain. High 71°, low 64°.

Pressure29.59 inHg

Wind10.5 mph W

Humidity58%

Visibility6.2 mi

Dew point56°

Mon, 1269° / 62°

0.01

69 °

Keystone, Monday, 12 October

Light rain. High 69°, low 62°.

Pressure29.91 inHg

Wind7.1 mph SW

Humidity51%

Visibility6.2 mi

Dew point50°

Tue, 1372° / 57°

72 °

Keystone, Tuesday, 13 October

Clear. High 72°, low 57°.

Pressure30.03 inHg

Wind7.9 mph W

Humidity48%

Visibility—

Dew point47°

Wed, 1474° / 56°

74 °

Keystone, Wednesday, 14 October

Clear. High 74°, low 56°.

Pressure30.06 inHg

Wind11.7 mph W

Humidity45%

Visibility—

Dew point47°

Thu, 1576° / 68°

76 °

Keystone, Thursday, 15 October

Clear. High 76°, low 68°.

Pressure29.97 inHg

Wind10.5 mph W

Humidity53%

Visibility—

Dew point53°

Fri, 1684° / 72°

84 °

Keystone, Friday, 16 October

Clear. High 84°, low 72°.

Pressure30.03 inHg

Wind7.6 mph W

Humidity25%

Visibility—

Dew point38°

Sat, 1781° / 73°

81 °

Keystone, Saturday, 17 October

Clear. High 81°, low 73°.

Pressure30.03 inHg

Wind9.4 mph W

Humidity25%

Visibility—

Dew point39°

Sun, 1883° / 74°

83 °

Keystone, Sunday, 18 October

Clear. High 83°, low 74°.

Pressure30.03 inHg

Wind11.9 mph W

Humidity24%

Visibility—

Dew point39°

Mon, 1982° / 74°

82 °

Keystone, Monday, 19 October

Clear. High 82°, low 74°.

Pressure30.00 inHg

Wind9.9 mph W

Humidity31%

Visibility—

Dew point45°

Tue, 2080° / 72°

80 °

Keystone, Tuesday, 20 October

Clear. High 80°, low 72°.

Pressure29.97 inHg

Wind9.5 mph W

Humidity43%

Visibility—

Dew point52°

Wed, 2179° / 70°

79 °

Keystone, Wednesday, 21 October

Clear. High 79°, low 70°.

Pressure29.97 inHg

Wind8.7 mph W

Humidity47%

Visibility—

Dew point53°

Thu, 2282° / 72°

82 °

Keystone, Thursday, 22 October

Clear. High 82°, low 72°.

Pressure29.97 inHg

Wind10.9 mph W

Humidity32%

Visibility—

Dew point46°

Fri, 2383° / 74°

83 °

Keystone, Friday, 23 October

Clear. High 83°, low 74°.

Pressure29.91 inHg

Wind10.8 mph W

Humidity28%

Visibility—

Dew point44°

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.