As of 04:35 PST

Weather in St. Helena, CA

51°

St. Helena, Friday, 6 November, 04:35

Partly cloudy. Feels like 49°. High 74°, low 48°.

Pressure30.12 inHg

Wind1 mph NW

Humidity66%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Monthly outlook for St. Helena, CA: average high 65.3°, average low 47°. That is 0.2° above the climate normal for November. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 4 days and 2.1 inches. The warmest day looks like 10 November (75.5°), the coolest 17 November (43.5°).

65.3°/47°

Average high / low

+0.2°

Above normal

4 / 4

Wet days / normal

1.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
6 November – 15 November	68.5°	66°	+1.4°
16 November – 25 November	59.9°	62.7°	-1.5°
26 November – 5 December	at normal	60.4°	—

November records over 66 years

88.9°3 November 2018All-time high

32.7°12 November 1985All-time low

Sat, 0774° / 46°

74 °

St. Helena, Saturday, 7 November

Overcast. High 74°, low 46°.

Pressure30.06 inHg

Wind2.3 mph E

Humidity27%

Visibility6.2 mi

Dew point37°

Sun, 0873° / 46°

73 °

St. Helena, Sunday, 8 November

Overcast. High 73°, low 46°.

Pressure30.09 inHg

Wind0.9 mph SE

Humidity35%

Visibility6.2 mi

Dew point43°

Mon, 0973° / 49°

73 °

St. Helena, Monday, 9 November

Mostly clear. High 73°, low 49°.

Pressure30.12 inHg

Wind3.6 mph W

Humidity44%

Visibility6.2 mi

Dew point47°

Tue, 1075° / 49°

75 °

St. Helena, Tuesday, 10 November

Clear. High 75°, low 49°.

Pressure30.18 inHg

Wind4.4 mph W

Humidity55%

Visibility—

Dew point49°

Wed, 1174° / 51°

74 °

St. Helena, Wednesday, 11 November

Overcast. High 74°, low 51°.

Pressure30.12 inHg

Wind4.3 mph E

Humidity56%

Visibility—

Dew point49°

Thu, 1261° / 52°

0.07

61 °

St. Helena, Thursday, 12 November

Light rain. High 61°, low 52°.

Pressure29.97 inHg

Wind5.7 mph W

Humidity75%

Visibility—

Dew point52°

Fri, 1358° / 46°

0.31

58 °

St. Helena, Friday, 13 November

Rain. High 58°, low 46°.

Pressure30.00 inHg

Wind9.2 mph SE

Humidity80%

Visibility—

Dew point48°

Sat, 1460° / 49°

0.23

60 °

St. Helena, Saturday, 14 November

Light rain. High 60°, low 49°.

Pressure29.97 inHg

Wind7.5 mph W

Humidity81%

Visibility—

Dew point52°

Sun, 1562° / 45°

62 °

St. Helena, Sunday, 15 November

Overcast. High 62°, low 45°.

Pressure30.15 inHg

Wind4.2 mph NW

Humidity65%

Visibility—

Dew point43°

Mon, 1652° / 48°

0.55

52 °

St. Helena, Monday, 16 November

Rain. High 52°, low 48°.

Pressure30.00 inHg

Wind3.6 mph N

Humidity93%

Visibility—

Dew point48°

Tue, 1756° / 44°

0.02

56 °

St. Helena, Tuesday, 17 November

Light rain. High 56°, low 44°.

Pressure30.15 inHg

Wind7 mph W

Humidity73%

Visibility—

Dew point44°

Wed, 1862° / 44°

62 °

St. Helena, Wednesday, 18 November

Partly cloudy. High 62°, low 44°.

Pressure30.24 inHg

Wind2.9 mph N

Humidity67%

Visibility—

Dew point44°

Thu, 1963° / 45°

63 °

St. Helena, Thursday, 19 November

Overcast. High 63°, low 45°.

Pressure30.24 inHg

Wind3.3 mph NE

Humidity50%

Visibility—

Dew point38°

Fri, 2063° / 45°

63 °

St. Helena, Friday, 20 November

Overcast. High 63°, low 45°.

Pressure30.21 inHg

Wind4 mph NE

Humidity41%

Visibility—

Dew point33°

Sat, 2163° / 46°

63 °

St. Helena, Saturday, 21 November

Overcast. High 63°, low 46°.

Pressure30.18 inHg

Wind3.1 mph NE

Humidity46%

Visibility—

Dew point35°

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

Sun, 2262° / 45°

0.15

62 °

St. Helena, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high62°

Average low45°

Average precipitation0.15 in

Chance of precipitation28%

Record high73° (1976)

Record low35° (1994)

Mon, 2363° / 45°

0.11

63 °

St. Helena, Monday, 23 November

Climate normal for this date — 60-year average.

Average high63°

Average low45°

Average precipitation0.11 in

Chance of precipitation18%

Record high76° (1995)

Record low36° (1994)

Tue, 2462° / 45°

0.09

62 °

St. Helena, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high62°

Average low45°

Average precipitation0.09 in

Chance of precipitation23%

Record high76° (1995)

Record low33° (2010)

Wed, 2562° / 45°

0.06

62 °

St. Helena, Wednesday, 25 November

Climate normal for this date — 60-year average.

Average high62°

Average low45°

Average precipitation0.06 in

Chance of precipitation20%

Record high74° (1986)

Record low34° (1993)

Thu, 2662° / 44°

0.07

62 °

St. Helena, Thursday, 26 November

Climate normal for this date — 60-year average.

Average high62°

Average low44°

Average precipitation0.07 in

Chance of precipitation20%

Record high73° (2002)

Record low36° (2010)

Fri, 2761° / 45°

0.09

61 °

St. Helena, Friday, 27 November

Climate normal for this date — 60-year average.

Average high61°

Average low45°

Average precipitation0.09 in

Chance of precipitation25%

Record high73° (2021)

Record low36° (1960)

Sat, 2860° / 44°

0.13

60 °

St. Helena, Saturday, 28 November

Climate normal for this date — 60-year average.

Average high60°

Average low44°

Average precipitation0.13 in

Chance of precipitation22%

Record high73° (2021)

Record low35° (2015)

Sun, 2961° / 44°

0.17

61 °

St. Helena, Sunday, 29 November

Climate normal for this date — 60-year average.

Average high61°

Average low44°

Average precipitation0.17 in

Chance of precipitation27%

Record high76° (2008)

Record low33° (2015)

Mon, 3060° / 44°

0.19

60 °

St. Helena, Monday, 30 November

Climate normal for this date — 60-year average.

Average high60°

Average low44°

Average precipitation0.19 in

Chance of precipitation25%

Record high78° (2021)

Record low34° (2022)

Tue, 0161° / 44°

0.17

61 °

St. Helena, Tuesday, 1 December

Climate normal for this date — 60-year average.

Average high61°

Average low44°

Average precipitation0.17 in

Chance of precipitation27%

Record high75° (2021)

Record low34° (1967)

Wed, 0260° / 44°

0.25

60 °

St. Helena, Wednesday, 2 December

Climate normal for this date — 60-year average.

Average high60°

Average low44°

Average precipitation0.25 in

Chance of precipitation30%

Record high74° (2021)

Record low31° (2022)

Thu, 0360° / 45°

0.26

60 °

St. Helena, Thursday, 3 December

Climate normal for this date — 60-year average.

Average high60°

Average low45°

Average precipitation0.26 in

Chance of precipitation35%

Record high69° (1976)

Record low36° (2022)

Fri, 0460° / 44°

0.11

60 °

St. Helena, Friday, 4 December

Climate normal for this date — 60-year average.

Average high60°

Average low44°

Average precipitation0.11 in

Chance of precipitation32%

Record high70° (1977)

Record low35° (1968)

Sat, 0560° / 44°

0.12

60 °

St. Helena, Saturday, 5 December

Climate normal for this date — 60-year average.

Average high60°

Average low44°

Average precipitation0.12 in

Chance of precipitation27%

Record high72° (2021)

Record low31° (1972)

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 St. Helena, 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 St. Helena, 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.