Gilroy
California, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Gilroy, CA

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Contents

A colorful sunset sky over the hilly region of Gilroy in California
A colorful sunset sky over the hilly region of Gilroy in California

Weather in January

January, the same as December, in Gilroy, California, is a moderate winter month, with average temperature fluctuating between 41.4°F (5.2°C) and 59.5°F (15.3°C). In Gilroy, the average high-temperature is almost the same as in December - a still moderate 59.5°F (15.3°C). Weather in January »

Weather in February

February, the last month of the winter, in Gilroy, is an enjoyable month, with temperature in the range of an average high of 60.8°F (16°C) and an average low of 40.6°F (4.8°C). In February, the average high-temperature is relatively the same as in January - an enjoyable 60.8°F (16°C). Weather in February »

Weather in March

The first month of the spring, March, is also an enjoyable month in Gilroy, California, with average temperature fluctuating between 40.6°F (4.8°C) and 63.3°F (17.4°C). In Gilroy, the average high-temperature is essentially the same as in February - a still enjoyable 63.3°F (17.4°C). Weather in March »

Weather in April

April in Gilroy, California, is a pleasant spring month, with average temperature ranging between max 68.2°F (20.1°C) and min 42.4°F (5.8°C). In Gilroy, the average high-temperature in April is almost the same as in March - an agreeable 68.2°F (20.1°C). Weather in April »

Weather in May

The last month of the spring, May, is also an agreeable month in Gilroy, California, with temperature in the range of an average low of 46°F (7.8°C) and an average high of 72.5°F (22.5°C). In Gilroy, the average high-temperature is relatively the same as in April - a still pleasant 72.5°F (22.5°C). Weather in May »

Weather in June

June, the first month of the summer, in Gilroy, is a warm month, with average temperature varying between 50.9°F (10.5°C) and 80.8°F (27.1°C). In June, the average high-temperature slightly increases, from a pleasant 72.5°F (22.5°C) in May, to a moderately hot 80.8°F (27.1°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Gilroy, California, with temperature in the range of an average high of 84.9°F (29.4°C) and an average low of 54°F (12.2°C). In Gilroy, the average high-temperature is almost the same as in June - a still moderately hot 84.9°F (29.4°C). Weather in July »

Weather in August

August, the last month of the summer, in Gilroy, is another warm month, with average temperature varying between 85.1°F (29.5°C) and 54.1°F (12.3°C). The warmest month is August, with an average high-temperature of 85.1°F (29.5°C) and an average low-temperature of 54.1°F (12.3°C). The average heat index is appraised at a hot 89.4°F (31.9°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Gilroy, California, with temperature in the range of an average high of 83.3°F (28.5°C) and an average low of 54.1°F (12.3°C). In September, the average high-temperature is essentially the same as in August - a still warm 83.3°F (28.5°C). Weather in September »

Weather in October

October, like September, in Gilroy, California, is a moderately hot autumn month, with temperature in the range of an average low of 51.1°F (10.6°C) and an average high of 75.6°F (24.2°C). In Gilroy, the average high-temperature slightly decreases, from 83.3°F (28.5°C) in September, to a still moderately hot 75.6°F (24.2°C). Weather in October »

Weather in November

November, the last month of the autumn, in Gilroy, is also an enjoyable month, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 44.8°F (7.1°C). In Gilroy, the average high-temperature drops, from a moderately hot 75.6°F (24.2°C) in October, to a comfortable 65.8°F (18.8°C). Weather in November »

Weather in December

December, the first month of the winter, in Gilroy, is still a mild month, with average temperature varying between 57.6°F (14.2°C) and 41.2°F (5.1°C). The coldest month is December, with an average high-temperature of 57.6°F (14.2°C) and an average low-temperature of 41.2°F (5.1°C). Weather in December »

FAQ

How much does it rain in Gilroy?

In Gilroy, during the entire year, the rain falls for 43.4 days and collects up to 3.66" (93mm) of precipitation.

What is the month with the lowest UV index in Gilroy?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index.

What is the most humid month in Gilroy?

March is the most humid month, with an average relative humidity of 74%.

What is the driest month in Gilroy?

June through August are months without rainfall in Gilroy.

When are the longest days in Gilroy?

June has the longest days of the year, with an average of 14.7h of daylight.

When is the highest UV index in Gilroy?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What month has the most sunshine in Gilroy?

With an average of 12.1h of sunshine, July has the most sunshine of the year.

What is the warmest month in Gilroy?

The warmest month in Gilroy, California, is August, with an average high-temperature of 85.1°F (29.5°C) and an average low-temperature of 54.1°F (12.3°C).

What is the least humid month in Gilroy?

With an average relative humidity of 57%, September is the least humid month in Gilroy, California.

When does it rain in Gilroy?

Months with rainfall in Gilroy are January through May, September through December.

What is the coldest month in Gilroy?

With an average high-temperature of 57.6°F (14.2°C) and an average low-temperature of 41.2°F (5.1°C), December is the coldest month.

What is the wettest month in Gilroy?

December is the month with the most rainfall in Gilroy. Rain falls for 6.6 days and accumulates 0.83" (21mm) of precipitation.

What is the month with the shortest days in Gilroy?

The month with the shortest days is December, with an average of 9.7h of daylight.

What is the month with the least sunshine in Gilroy?

The month with the least sunshine in Gilroy is December, with an average of 6h of sunshine.

Average temperature
Gilroy, CA

Average temperature - Gilroy, CA

The warmest month (with the highest average high temperature) is August (85.1°F).
The month with the lowest average high temperature is December (57.6°F).

Months with the highest average low temperature are August and September (54.1°F).
Coldest months (with the lowest average low temperature) are February and March (40.6°F).

Average humidity
Gilroy, CA

Average humidity - Gilroy, CA

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (57%).

Average rainfall
Gilroy, CA

Average rainfall - Gilroy, CA

The wettest month (with the highest rainfall) is December (0.83").
Driest months (with the lowest rainfall) are June, July and August (0").

Average rainfall days
Gilroy, CA

Average rainfall days - Gilroy, CA

The month with the highest number of rainy days is March (8.3 days).
The month with the lowest number of rainy days is August (0.6 days).

Average daylight / Average sunshine
Gilroy, CA

Average daylight / Average sunshine - Gilroy, CA

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.7h).

The month with most sunshine is July (Average sunshine: 12.1h).
The month with least sunshine is December (Average sunshine: 6h).

Average UV index
Gilroy, CA

Average UV index - Gilroy, CA

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).