As of 11:01 PST

Weather in St. Helena, CA

71°

St. Helena, Wednesday, 11 November, 11:01

Clear. Feels like 71°. High 74°, low 48°.

Pressure30.09 inHg

Wind2 mph E

Humidity57%

Visibility6.2 mi

Dew point53°

See detailed hourly forecast

Monthly outlook for St. Helena, CA: average high 60.8°, average low 46.1°. That is 1.5° below the climate normal for November. Precipitation is expected on 4 days (about 3.9 inches), against a normal of 4 days and 2.0 inches. The warmest day looks like 11 November (74.4°), the coolest 21 November (40.7°).

60.8°/46.1°

Average high / low

−1.5°

Below normal

4 / 4

Wet days / normal

3.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
11 November – 20 November	59.5°	64.2°	-2.6°
21 November – 30 November	62.9°	61.4°	+0.8°
1 December – 10 December	at normal	59.6°	—

November records over 66 years

88.9°3 November 2018All-time high

32.7°12 November 1985All-time low

Thu, 1271° / 46°

71 °

St. Helena, Thursday, 12 November

Overcast. High 71°, low 46°.

Pressure29.83 inHg

Wind7.1 mph S

Humidity56%

Visibility6.2 mi

Dew point51°

Fri, 1355° / 45°

1.49

55 °

St. Helena, Friday, 13 November

Heavy rain. High 55°, low 45°.

Pressure29.53 inHg

Wind2.9 mph SW

Humidity99%

Visibility0.6 mi

Dew point52°

Sat, 1459° / 44°

0.03

59 °

St. Helena, Saturday, 14 November

Light rain. High 59°, low 44°.

Pressure29.94 inHg

Wind4.5 mph SW

Humidity78%

Visibility6.2 mi

Dew point50°

Sun, 1558° / 49°

0.75

58 °

St. Helena, Sunday, 15 November

Rain. High 58°, low 49°.

Pressure30.03 inHg

Wind9 mph S

Humidity88%

Visibility—

Dew point52°

Mon, 1654° / 43°

0.03

54 °

St. Helena, Monday, 16 November

Light rain. High 54°, low 43°.

Pressure30.09 inHg

Wind8.1 mph W

Humidity83%

Visibility—

Dew point46°

Tue, 1759° / 41°

59 °

St. Helena, Tuesday, 17 November

Clear. High 59°, low 41°.

Pressure30.00 inHg

Wind6.5 mph W

Humidity55%

Visibility—

Dew point37°

Wed, 1855° / 44°

1.5

55 °

St. Helena, Wednesday, 18 November

Heavy rain. High 55°, low 44°.

Pressure29.97 inHg

Wind14.7 mph S

Humidity96%

Visibility—

Dew point51°

Thu, 1956° / 43°

56 °

St. Helena, Thursday, 19 November

Overcast. High 56°, low 43°.

Pressure30.18 inHg

Wind3.7 mph W

Humidity70%

Visibility—

Dew point41°

Fri, 2054° / 43°

54 °

St. Helena, Friday, 20 November

Overcast. High 54°, low 43°.

Pressure30.21 inHg

Wind5.6 mph NE

Humidity71%

Visibility—

Dew point43°

Sat, 2157° / 41°

57 °

St. Helena, Saturday, 21 November

Clear. High 57°, low 41°.

Pressure30.18 inHg

Wind9.3 mph NE

Humidity38%

Visibility—

Dew point27°

Sun, 2256° / 43°

56 °

St. Helena, Sunday, 22 November

Overcast. High 56°, low 43°.

Pressure30.21 inHg

Wind4.3 mph NE

Humidity51%

Visibility—

Dew point34°

Mon, 2362° / 51°

62 °

St. Helena, Monday, 23 November

Overcast. High 62°, low 51°.

Pressure30.21 inHg

Wind4.3 mph SE

Humidity50%

Visibility—

Dew point37°

Tue, 2463° / 52°

0.08

63 °

St. Helena, Tuesday, 24 November

Light rain. High 63°, low 52°.

Pressure30.30 inHg

Wind3.3 mph E

Humidity86%

Visibility—

Dew point51°

Wed, 2568° / 51°

68 °

St. Helena, Wednesday, 25 November

Overcast. High 68°, low 51°.

Pressure30.24 inHg

Wind3.1 mph NE

Humidity72%

Visibility—

Dew point51°

Thu, 2671° / 54°

71 °

St. Helena, Thursday, 26 November

Overcast. High 71°, low 54°.

Pressure30.15 inHg

Wind2.9 mph NW

Humidity65%

Visibility—

Dew point51°

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

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)

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)

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.