Saint Helena
California, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Saint Helena, CA

January, the same as December, in Saint Helena, California, is another mild winter month, with temperature in the range of an average low of 36.3°F (2.4°C) and an average high of 56.7°F (13.7°C). January is the coldest month, with an average high-temperature of 56.7°F (13.7°C) and an average low-temperature of 36.3°F (2.4°C). Weather in January »
February, the last month of the winter, in Saint Helena, is a comfortable month, with temperature in the range of an average low of 38.8°F (3.8°C) and an average high of 61.2°F (16.2°C). In February, the average high-temperature is practically the same as in January - a comfortable 61.2°F (16.2°C). Weather in February »

The first month of the spring, March, is still a comfortable month in Saint Helena, California, with temperature in the range of an average high of 65.5°F (18.6°C) and an average low of 40.3°F (4.6°C). In Saint Helena, the average high-temperature is essentially the same as in February - a still enjoyable 65.5°F (18.6°C). Weather in March »

April in Saint Helena, California, is an agreeable spring month, with average temperature varying between 42.6°F (5.9°C) and 71.4°F (21.9°C). In Saint Helena, the average high-temperature in April marginally rises, from a comfortable 65.5°F (18.6°C) in March, to a pleasant 71.4°F (21.9°C). Weather in April »

May, the last month of the spring, in Saint Helena, is a warm month, with average temperature ranging between min 46.8°F (8.2°C) and max 78.1°F (25.6°C). In May, the average high-temperature slightly increases, from an agreeable 71.4°F (21.9°C) in April, to a warm 78.1°F (25.6°C). Weather in May »

June, the first month of the summer, in Saint Helena, is also a moderately hot month, with average temperature ranging between max 84.9°F (29.4°C) and min 50.4°F (10.2°C). In Saint Helena, California, the average high-temperature marginally rises, from 78.1°F (25.6°C) in May, to a still warm 84.9°F (29.4°C). Weather in June »

July is a hot summer month in Saint Helena, California, with average temperature varying between 52.2°F (11.2°C) and 89.8°F (32.1°C). July is the warmest month, with an average high-temperature of 89.8°F (32.1°C) and an average low-temperature of 52.2°F (11.2°C). Weather in July »

The last month of the summer, August, is another tropical month in Saint Helena, California, with temperature in the range of an average low of 51.4°F (10.8°C) and an average high of 88.9°F (31.6°C). In August, the average high-temperature is practically the same as in July - a still tropical 88.9°F (31.6°C). Weather in August »

The first month of the autumn, September, is still a warm month in Saint Helena, California, with average temperature fluctuating between 49.1°F (9.5°C) and 85.8°F (29.9°C). In Saint Helena, the average high-temperature is almost the same as in August - a warm 85.8°F (29.9°C). Weather in September »

October, like September, in Saint Helena, California, is a moderately hot autumn month, with average temperature varying between 77.4°F (25.2°C) and 45.3°F (7.4°C). In Saint Helena, the average high-temperature slightly decreases, from 85.8°F (29.9°C) in September, to a still moderately hot 77.4°F (25.2°C). Weather in October »

The last month of the autumn, November, is also an enjoyable month in Saint Helena, California, with temperature in the range of an average low of 40.3°F (4.6°C) and an average high of 66.2°F (19°C). In Saint Helena, the average high-temperature drops, from a moderately hot 77.4°F (25.2°C) in October, to an enjoyable 66.2°F (19°C). Weather in November »

December, the first month of the winter, in Saint Helena, is still a mild month, with temperature in the range of an average low of 36.7°F (2.6°C) and an average high of 57.6°F (14.2°C). In Saint Helena, California, the average high-temperature in December slightly decreases, from an enjoyable 66.2°F (19°C) in November, to a mild 57.6°F (14.2°C). Weather in December »

What is the coldest month in Saint Helena?

With an average high-temperature of 56.7°F (13.7°C) and an average low-temperature of 36.3°F (2.4°C), January is the coldest month in Saint Helena.

How much does it rain in Saint Helena?

Throughout the year, there are 48 rainfall days, and 34.6" (878.7mm) of precipitation is accumulated.

What is the wettest month in Saint Helena?

The month with the most rainfall in Saint Helena, California, is January when the rain falls for 9 days and typically aggregates up to 7.6" (193mm) of precipitation.

When are the longest days in Saint Helena?

June has the longest days of the year, with an average of 14.8h of daylight.

What is the warmest month in Saint Helena?

July is the warmest month in Saint Helena, California, with an average high-temperature of 89.8°F (32.1°C) and an average low-temperature of 52.2°F (11.2°C).

What is the driest month in Saint Helena?

July is the month with the least rainfall in Saint Helena, California, with 0" (0.8mm) of accumulated precipitation.

What is the month with the shortest days in Saint Helena?

The month with the shortest days in Saint Helena is December, with an average of 9.5h of daylight.
Average temperature - Saint Helena, CA
Average rainfall - Saint Helena, CA
Average rainfall days - Saint Helena, CA
Average daylight - Saint Helena, CA

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.5h).