As of 20:24 PST

Weather in St. Helena, CA

61°

St. Helena, Monday, 9 November, 20:24

Clear. Feels like 60°. High 72°, low 48°.

Pressure30.12 inHg

Wind3.4 mph W

Humidity69%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

Monthly outlook for St. Helena, CA: average high 61.5°, average low 44.9°. That is 1.3° below the climate normal for November. Precipitation is expected on 5 days (about 2.6 inches), against a normal of 4 days and 2.1 inches. The warmest day looks like 10 November (76.2°), the coolest 19 November (39.8°).

61.5°/44.9°

Average high / low

−1.3°

Below normal

5 / 4

Wet days / normal

2.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 November – 18 November	63.8°	64.9°	-0.6°
19 November – 28 November	57.7°	61.8°	-2.3°
29 November – 8 December	at normal	59.8°	—

November records over 66 years

88.9°3 November 2018All-time high

32.7°12 November 1985All-time low

Tue, 1076° / 47°

76 °

St. Helena, Tuesday, 10 November

Clear. High 76°, low 47°.

Pressure30.18 inHg

Wind1.1 mph SW

Humidity37%

Visibility6.2 mi

Dew point47°

Wed, 1174° / 45°

74 °

St. Helena, Wednesday, 11 November

Clear. High 74°, low 45°.

Pressure30.06 inHg

Wind3.8 mph E

Humidity42%

Visibility6.2 mi

Dew point47°

Thu, 1272° / 47°

72 °

St. Helena, Thursday, 12 November

Overcast. High 72°, low 47°.

Pressure29.85 inHg

Wind4.6 mph E

Humidity42%

Visibility6.2 mi

Dew point45°

Fri, 1359° / 47°

0.93

59 °

St. Helena, Friday, 13 November

Heavy rain. High 59°, low 47°.

Pressure29.56 inHg

Wind12.3 mph SW

Humidity96%

Visibility2.6 mi

Dew point55°

Sat, 1461° / 43°

61 °

St. Helena, Saturday, 14 November

Clear. High 61°, low 43°.

Pressure29.91 inHg

Wind4.8 mph W

Humidity84%

Visibility—

Dew point47°

Sun, 1555° / 48°

0.48

55 °

St. Helena, Sunday, 15 November

Rain. High 55°, low 48°.

Pressure30.00 inHg

Wind6.3 mph S

Humidity84%

Visibility—

Dew point49°

Mon, 1656° / 44°

0.05

56 °

St. Helena, Monday, 16 November

Light rain. High 56°, low 44°.

Pressure30.12 inHg

Wind8 mph SW

Humidity69%

Visibility—

Dew point43°

Tue, 1757° / 42°

57 °

St. Helena, Tuesday, 17 November

Clear. High 57°, low 42°.

Pressure30.18 inHg

Wind5.5 mph W

Humidity66%

Visibility—

Dew point41°

Wed, 1855° / 41°

0.49

55 °

St. Helena, Wednesday, 18 November

Rain. High 55°, low 41°.

Pressure30.03 inHg

Wind13.3 mph NW

Humidity72%

Visibility—

Dew point41°

Thu, 1961° / 40°

61 °

St. Helena, Thursday, 19 November

Clear. High 61°, low 40°.

Pressure30.06 inHg

Wind14 mph N

Humidity39%

Visibility—

Dew point29°

Fri, 2065° / 47°

65 °

St. Helena, Friday, 20 November

Clear. High 65°, low 47°.

Pressure30.00 inHg

Wind13.8 mph N

Humidity22%

Visibility—

Dew point20°

Sat, 2160° / 41°

60 °

St. Helena, Saturday, 21 November

Mostly clear. High 60°, low 41°.

Pressure30.06 inHg

Wind5.2 mph NE

Humidity45%

Visibility—

Dew point32°

Sun, 2250° / 43°

50 °

St. Helena, Sunday, 22 November

Overcast. High 50°, low 43°.

Pressure30.06 inHg

Wind5.3 mph NE

Humidity55%

Visibility—

Dew point32°

Mon, 2360° / 47°

60 °

St. Helena, Monday, 23 November

Overcast. High 60°, low 47°.

Pressure29.83 inHg

Wind6.4 mph E

Humidity55%

Visibility—

Dew point40°

Tue, 2450° / 48°

0.69

50 °

St. Helena, Tuesday, 24 November

Rain. High 50°, low 48°.

Pressure29.94 inHg

Wind5 mph NE

Humidity92%

Visibility—

Dew point48°

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

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)

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)

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.