As of 00:28 PST

Weather in St. Helena, CA

51°

St. Helena, Sunday, 15 November, 00:28

Overcast. Feels like 50°. High 60°, low 50°.

Pressure30.00 inHg

Wind1.6 mph SE

Humidity93%

Visibility6.2 mi

Dew point48°

See detailed hourly forecast

Monthly outlook for St. Helena, CA: average high 58.6°, average low 45.9°. That is 2° below the climate normal for November. Precipitation is expected on 7 days (about 6.2 inches), against a normal of 4 days and 2.1 inches. The warmest day looks like 29 November (64.4°), the coolest 17 November (36.7°).

58.6°/45.9°

Average high / low

−2°

Below normal

7 / 4

Wet days / normal

6.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
15 November – 24 November	56.4°	62.9°	-3.7°
25 November – 4 December	62.4°	60.6°	+1°
5 December – 14 December	at normal	58.4°	—

November records over 66 years

88.9°3 November 2018All-time high

32.7°12 November 1985All-time low

Mon, 1660° / 41°

0.01

60 °

St. Helena, Monday, 16 November

Light rain. High 60°, low 41°.

Pressure30.09 inHg

Wind4.4 mph W

Humidity52%

Visibility6.2 mi

Dew point40°

Tue, 1757° / 37°

0.02

57 °

St. Helena, Tuesday, 17 November

Light rain. High 57°, low 37°.

Pressure30.06 inHg

Wind4.4 mph SW

Humidity45%

Visibility6.2 mi

Dew point35°

Wed, 1855° / 45°

1.11

55 °

St. Helena, Wednesday, 18 November

Rain. High 55°, low 45°.

Pressure29.94 inHg

Wind3.9 mph S

Humidity78%

Visibility6.2 mi

Dew point46°

Thu, 1947° / 45°

0.54

47 °

St. Helena, Thursday, 19 November

Rain. High 47°, low 45°.

Pressure29.85 inHg

Wind7.2 mph NE

Humidity97%

Visibility—

Dew point46°

Fri, 2056° / 40°

56 °

St. Helena, Friday, 20 November

Light rain. High 56°, low 40°.

Pressure29.97 inHg

Wind5.4 mph W

Humidity89%

Visibility—

Dew point45°

Sat, 2158° / 47°

58 °

St. Helena, Saturday, 21 November

Overcast. High 58°, low 47°.

Pressure30.09 inHg

Wind7.1 mph S

Humidity79%

Visibility—

Dew point47°

Sun, 2255° / 49°

0.48

55 °

St. Helena, Sunday, 22 November

Rain. High 55°, low 49°.

Pressure30.03 inHg

Wind7.6 mph SE

Humidity96%

Visibility—

Dew point48°

Mon, 2357° / 48°

0.08

57 °

St. Helena, Monday, 23 November

Light rain. High 57°, low 48°.

Pressure30.09 inHg

Wind7.3 mph S

Humidity80%

Visibility—

Dew point48°

Tue, 2458° / 56°

1.43

58 °

St. Helena, Tuesday, 24 November

Heavy rain. High 58°, low 56°.

Pressure30.03 inHg

Wind16.1 mph S

Humidity89%

Visibility—

Dew point54°

Wed, 2558° / 49°

1.79

58 °

St. Helena, Wednesday, 25 November

Heavy rain. High 58°, low 49°.

Pressure29.91 inHg

Wind9.9 mph W

Humidity80%

Visibility—

Dew point51°

Thu, 2664° / 45°

64 °

St. Helena, Thursday, 26 November

Clear. High 64°, low 45°.

Pressure30.06 inHg

Wind14.1 mph N

Humidity65%

Visibility—

Dew point43°

Fri, 2764° / 48°

64 °

St. Helena, Friday, 27 November

Clear. High 64°, low 48°.

Pressure30.03 inHg

Wind8.4 mph NE

Humidity44%

Visibility—

Dew point37°

Sat, 2862° / 45°

62 °

St. Helena, Saturday, 28 November

Partly cloudy. High 62°, low 45°.

Pressure30.09 inHg

Wind6.3 mph NE

Humidity53%

Visibility—

Dew point38°

Sun, 2964° / 47°

64 °

St. Helena, Sunday, 29 November

Overcast. High 64°, low 47°.

Pressure30.12 inHg

Wind3.8 mph NE

Humidity50%

Visibility—

Dew point38°

Mon, 3062° / 45°

62 °

St. Helena, Monday, 30 November

Clear. High 62°, low 45°.

Pressure30.12 inHg

Wind3.6 mph E

Humidity59%

Visibility—

Dew point41°

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

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)

Sun, 0659° / 45°

0.14

59 °

St. Helena, Sunday, 6 December

Climate normal for this date — 60-year average.

Average high59°

Average low45°

Average precipitation0.14 in

Chance of precipitation35%

Record high73° (1979)

Record low33° (2013)

Mon, 0759° / 44°

0.13

59 °

St. Helena, Monday, 7 December

Climate normal for this date — 60-year average.

Average high59°

Average low44°

Average precipitation0.13 in

Chance of precipitation37%

Record high72° (1975)

Record low33° (2013)

Tue, 0859° / 44°

0.13

59 °

St. Helena, Tuesday, 8 December

Climate normal for this date — 60-year average.

Average high59°

Average low44°

Average precipitation0.13 in

Chance of precipitation27%

Record high75° (2020)

Record low29° (1972)

Wed, 0959° / 43°

0.14

59 °

St. Helena, Wednesday, 9 December

Climate normal for this date — 60-year average.

Average high59°

Average low43°

Average precipitation0.14 in

Chance of precipitation28%

Record high69° (2012)

Record low27° (1972)

Thu, 1059° / 43°

0.16

59 °

St. Helena, Thursday, 10 December

Climate normal for this date — 60-year average.

Average high59°

Average low43°

Average precipitation0.16 in

Chance of precipitation33%

Record high70° (2012)

Record low28° (1972)

Fri, 1158° / 42°

0.19

58 °

St. Helena, Friday, 11 December

Climate normal for this date — 60-year average.

Average high58°

Average low42°

Average precipitation0.19 in

Chance of precipitation30%

Record high70° (2017)

Record low28° (1972)

Sat, 1257° / 43°

0.22

57 °

St. Helena, Saturday, 12 December

Climate normal for this date — 60-year average.

Average high57°

Average low43°

Average precipitation0.22 in

Chance of precipitation28%

Record high69° (1988)

Record low30° (1972)

Sun, 1357° / 43°

0.16

57 °

St. Helena, Sunday, 13 December

Climate normal for this date — 60-year average.

Average high57°

Average low43°

Average precipitation0.16 in

Chance of precipitation32%

Record high70° (1988)

Record low28° (1972)

Mon, 1457° / 42°

0.21

57 °

St. Helena, Monday, 14 December

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.21 in

Chance of precipitation30%

Record high73° (2017)

Record low30° (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.