Simi Valley
California, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Simi Valley, CA

An aerial shot of the deep design and plan of the Simi Valley city in California, with a view of the scenic Rocky Peak and hilly ranges and a clear sky
An aerial shot of the deep design and plan of the Simi Valley city in California, with a view of the scenic Rocky Peak and hilly ranges and a clear sky
January, like December, is another pleasant winter month in Simi Valley, California, with average temperature varying between 39°F (3.9°C) and 69.1°F (20.6°C). In Simi Valley, the average high-temperature in January is essentially the same as in December - a still agreeable 69.1°F (20.6°C). Weather in January »
The last month of the winter, February, is also an agreeable month in Simi Valley, California, with temperature in the range of an average high of 70°F (21.1°C) and an average low of 41°F (5°C). In February, the average high-temperature is almost the same as in January - a still agreeable 70°F (21.1°C). Weather in February »

The first month of the spring, March, is also an agreeable month in Simi Valley, California, with average temperature ranging between min 42.1°F (5.6°C) and max 73°F (22.8°C). In March, the average high-temperature is relatively the same as in February - a still agreeable 73°F (22.8°C). Weather in March »

April in Simi Valley, California, is a warm spring month, with temperature in the range of an average low of 45°F (7.2°C) and an average high of 78.1°F (25.6°C). In April, the average high-temperature is essentially the same as in March - a moderately hot 78.1°F (25.6°C). Weather in April »

The last month of the spring, May, is another warm month in Simi Valley, California, with average temperature varying between 48.9°F (9.4°C) and 82.9°F (28.3°C). In May, the average high-temperature is essentially the same as in April - a still warm 82.9°F (28.3°C). Weather in May »

June, the first month of the summer, in Simi Valley, is a tropical month, with average temperature ranging between max 88°F (31.1°C) and min 53.1°F (11.7°C). In Simi Valley, the average high-temperature is essentially the same as in May - a hot 88°F (31.1°C). Weather in June »

July is a torrid summer month in Simi Valley, California, with temperature in the range of an average high of 95°F (35°C) and an average low of 57°F (13.9°C). In July, the average high-temperature slightly increases, from a tropical 88°F (31.1°C) in June, to a torrid 95°F (35°C). Weather in July »

August, the last month of the summer, in Simi Valley, is another very hot month, with temperature in the range of an average low of 57°F (13.9°C) and an average high of 97°F (36.1°C). The warmest month is August, with an average high-temperature of 97°F (36.1°C) and an average low-temperature of 57°F (13.9°C). Weather in August »

September, the first month of the autumn, in Simi Valley, is also a hot month, with average temperature ranging between min 55°F (12.8°C) and max 93°F (33.9°C). In Simi Valley, the average high-temperature is relatively the same as in August - a hot 93°F (33.9°C). Weather in September »

October, like September, in Simi Valley, California, is a moderately hot autumn month, with temperature in the range of an average high of 84°F (28.9°C) and an average low of 48.9°F (9.4°C). In October, the average high-temperature drops, from a tropical 93°F (33.9°C) in September, to a warm 84°F (28.9°C). Weather in October »

November, the last month of the autumn, in Simi Valley, is also a moderately hot month, with average temperature fluctuating between 75°F (23.9°C) and 43°F (6.1°C). In Simi Valley, the average high-temperature in November drops, from a moderately hot 84°F (28.9°C) in October, to a still warm 75°F (23.9°C). Weather in November »

December, the first month of the winter, in Simi Valley, is also an agreeable month, with average temperature varying between 68°F (20°C) and 37.9°F (3.3°C). December is the coldest month, with an average high-temperature of 68°F (20°C) and an average low-temperature of 37.9°F (3.3°C). Weather in December »

How much does it rain in Simi Valley?

During the entire year, Simi Valley aggregates up to 17.9" (455.4mm) of precipitation.

What is the rainiest month in Simi Valley?

February is the month with the most rainfall in Simi Valley, California, with 4.8" (122.2mm) of accumulated precipitation.

When are the longest days in Simi Valley?

The month with the longest days is June, with an average of 14.4h of daylight.

What is the driest month in Simi Valley?

July is the month with the least rainfall in Simi Valley, California, with 0" (0.5mm) of accumulated precipitation.

What is the warmest month in Simi Valley?

The warmest month in Simi Valley is August, with an average high-temperature of 97°F (36.1°C) and an average low-temperature of 57°F (13.9°C).

What is the coldest month in Simi Valley?

With an average high-temperature of 68°F (20°C) and an average low-temperature of 37.9°F (3.3°C), December is the coldest month.

What is the month with the shortest days in Simi Valley?

The month with the shortest days is December, with an average of 9.9h of daylight.
Average rainfall - Simi Valley, CA
Average daylight - Simi Valley, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).