Climate and monthly weather forecast
Stockton, CA

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The climate of Stockton

Identified by the Köppen climate classification system, Stockton, California, USA, falls under the Csa category, commonly referred to as a Mediterranean, hot summer climate zone. This climate classification finds its roots in Stockton's geographical position where it experiences dry, hot summers and cooler, wet winters.

Delving into the climatology of Stockton reveals the city sees a wide array of weather across the twelvemonth span. The highest annual temperature observed in Stockton averages from 94.3°F (34.6°C) in July to an average low temperature of 41.2°F (5.1°C) in December. Alongside noticeable temperature fluctuations, relative humidity wavers around 73% in January and decreases to 44% in July.

Rainfall in Stockton sees a significant decrease from the start of the year, with 1.81" (46mm) in January declining to a negligible 0.04" (1mm) in July. The number of rainfall days harmonises with this pattern, starting with 8.6 days in January and striking a low of approximately a day in July. Increasing thereafter, it returns to 9 days by December end. Contrarily, the number of sunshine hours per day manifests an opposing trend; 6.1 hours in the first month and climaxes at 12.2 hours in July, decreasing with the year's end. The cloud cover follows this pattern, declining from 32% in January to 4% in July.

The best time to visit Stockton

Analysing the climatology of Stockton, the outstanding period for visitations is between May and October. This time of the year boasts minimal rainfall, from 0.12" (3mm) in June to negligibly no rainfall in August. Correspondingly, the number of rainfall days is between 1.3 days in June and 0.7 days in August. During this period, sunlight is strong, averaging 14.2 hours of daylight in May, peaking at 14.8 hours in June and gradually descending to 11.2 hours in October. Accordingly, the UV Index ranges from 5 in May, peaks to 7 in June and July, and declines to 5 by October.

The worst time to visit Stockton

If adverse weather conditions are not up to visitors' purposes, it is wise to avoid planning a trip away from January to March. This period sees the most considerable rainfall, with amounts ranging from 2.13" (54mm) in February to 1.81" (46mm) in January. The number of rainfall days is also frequent, ranging from 8.6 days in January to 12 days in March. The temperatures during this period are relatively low, with averages down from 56.8°F (13.8°C) in January to 64.9°F (18.3°C) in March.

Spring weather in Stockton

In Stockton, Spring ushers in warmer weather and longer days. The highest recorded temperatures are from 64.9°F (18.3°C) in March to 78.4°F (25.8°C) in May. Simultaneously, the lowest recorded temperatures increase from 43.9°F (6.6°C) to 51.8°F (11°C). During this time, rainfall quantities decrease significantly from 2.09" (53mm) in March to 0.59" (15mm) in May. The number of days with rainfall reduce from 12 in March to 4.3 in May.

Summer weather in Stockton

The summer months in Stockton are characterized by hot temperatures reaching a soaring 94.3°F (34.6°C) in July. The lowest recorded number in this period is 56.8°F (13.8°C) in June, indicating warm nights. Rainfall is at its most minimal, with June averaging at 0.12" (3mm) and July having almost no rain. Just under a day is all that counts for rainfall each month.

Autumn weather in Stockton

Autumn in Stockton sees a steady decline in temperature, with the highest temperature dropping from 88.7°F (31.5°C) in September to 64.6°F (18.1°C) in November. Although rainfall increases from 0.08" (2mm) in September to 1.22" (31mm) in November, the number of rainfall days is only between 1.6 and 6.6. Autumnal days remain fairly sunny with daylight hours reducing from 12.4 in September to 10.1 in November.

Winter weather in Stockton

Winter in Stockton brings the year's colder temperatures with highs falling from 55.2°F (12.9°C) in December to 56.8°F (13.8°C) in February. Meanwhile, the low temperatures are between 41.2°F (5.1°C) and 42.1°F (5.6°C). Rainfall during this period is at its peak from 1.77" (45mm) in December to 2.13" (54mm) in February. Rainfall days correspond to these patterns, with 9 to 7.9 days of rain. Despite the winter season, sunshine hours remain plentiful, averaging between 5.9 hours and 6.2 hours per day.

Weather in January

Stockton in California begins the year with moderate weather conditions, setting the pace for the rest of winter. Rainfall can be experienced this month, as indicated by 1.81" (46mm) of accumulated precipitation. The city transitions from December's chilly environment into January with a subtle increase in temperature. Weather in January »

Weather in February

February's weather in Stockton is similar to January's, although there is slight warming as the month unfolds. February's significant weather characteristic is the 2.13" (54mm) of rainfall, slightly higher than in January, making it one of the wetter months of the year. Weather in February »

Weather in March

March brings a notable shift in the weather pattern of Stockton, marking the transition from winter to spring. This month sees the maximum rainfall of 2.09" (53mm) for the year, coupled with a significant increase in temperature from February. Weather in March »

Weather in April

April witnesses a notable improvement in the conditions with the arrival of spring in Stockton, California. The weather, characterized by 0.91" (23mm) of rainfall, indicates a sharp decrease compared to March, initiating the city's dry season. Weather in April »

Weather in May

May solidifies the spring season in Stockton, preparing the city for the upcoming summer months. The weather witnesses a significant decline in rainfall to just 0.59" (15mm), making May considerably drier than April. The city enjoys increased sunshine hours and a substantial rise in temperatures. Weather in May »

Weather in June

June signifies the onset of summer in Stockton, with temperatures beginning to soar. A sharp reduction in precipitation to 0.12" (3mm) defines the month’s weather, making it the driest period of the year. With extended daylight hours, outdoor activities become increasingly appealing. Weather in June »

Weather in July

July represents the peak of summer in Stockton, with some of the highest temperatures of the year. The conditions of the month reflect this, with minimal rainfall registering at 0.04" (1mm), further elevating the dryness. The city basks in lengthy sunshine hours, and the lowest cloud percentages noted throughout the year. Weather in July »

Weather in August

August in Stockton sustains the summer's hot and dry weather, presenting similar conditions to July. A unique aspect of the month is the complete absence of rainfall, keeping the environment extremely dry. Even though there is a slight decline in sunshine hours compared to July, August remains a very sunny period. Weather in August »

Weather in September

With the advent of September, Stockton begins to transition from summer to autumn. An influx of moisture can be observed in the weather as rainfall increases to 0.08" (2mm) from no precipitation in August. While temperatures start to decrease, September retains a sizeable amount of sunshine. Weather in September »

Weather in October

October ushers in a fresh autumn breeze in Stockton, California as it officially moves away from the scorching summer months. The mild rainfall of 0.59" (15mm) is complemented by comfortable temperatures, making October a pleasant month. Weather in October »

Weather in November

November in Stockton signifies the progression into the final stages of autumn, with a clear drop in temperature and rising humidity levels. The average rainfall increases to 1.22" (31mm), reflecting a moist atmosphere. Despite the reduced sunshine, the weather remains fairly comfortable, making outdoor activities enjoyable, but jackets become a necessity. Weather in November »

Weather in December

December concludes the climatic cycle in Stockton, bringing with it the onset of winter. During this month, rainfall reaches 1.77" (45mm), providing the city with a decidedly damp environment. The city experiences shorter days and less sunshine, embodying the cold, dark winter ambiance. Weather in December »

Frequently asked questions

What is the most humid month in Stockton?

January is the most humid month, with an average relative humidity of 73%.

How many days does it rain in Stockton?

In Stockton, during the entire year, the rain falls for 64.2 days and collects up to 11.34" (288mm) of precipitation.

When it does not snow in Stockton?

January through November are months without snowfall in Stockton, California.

How many days does it snow in Stockton?

In Stockton, California, during the entire year, snow falls for 0.1 days.

What are the months with the lowest UV index in Stockton?

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

What is the wettest month in Stockton?

The month with the most rainfall is February, when the rain falls for 7.9 days and typically aggregates up to 2.13" (54mm) of precipitation.

When is Daylight Saving Time (DST) in Stockton?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Stockton, California, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When are the longest days in Stockton?

The month with the longest days is June, with an average of 14h and 48min of daylight.

When is the highest UV index in Stockton?

June and July, with an average maximum UV index of 7, are months with the highest UV index.

What are the warmest months in Stockton?

The warmest time of the year in Stockton, California, is July, with temperatures averaging a high of 94.3°F (34.6°C) and a low of 59.4°F (15.2°C).

What is the least humid month in Stockton?

The least humid month in Stockton is July, with an average relative humidity of 44%.

What month has the most sunshine in Stockton?

July has the most sunshine of the year in Stockton, with an average of 12.2h of sunshine.

What is the driest month in Stockton?

August is the only month when rain does not fall in Stockton, California.

When does it rain in Stockton?

January through July, September through December are months with rainfall in Stockton.

What is the coldest month in Stockton?

The coldest time of the year is December, with temperatures averaging a high of 55.2°F (12.9°C) and a low of 41.2°F (5.1°C).

When does it snow in Stockton?

December is the only month when snow falls in Stockton, California.

When does it snow the most in Stockton?

December has the most snowfall days of the year in Stockton, California. Snow falls for 0.1 days.

What is the month with the shortest days in Stockton?

With an average of 9h and 36min of daylight, December has the shortest days of the year in Stockton.

What is the month with the least sunshine in Stockton?

The month with the least sunshine in Stockton, California, is December, with an average of 5.9h of sunshine.

Average temperature
Stockton, CA

Average temperature - Stockton, CA

The warmest month (with the highest average high temperature) is July (94.3°F).
The month with the lowest average high temperature is December (55.2°F).

The month with the highest average low temperature is August (59.5°F).
The coldest month (with the lowest average low temperature) is December (41.2°F).

Average pressure
Stockton, CA

Average pressure - Stockton, CA

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed
Stockton, CA

Average wind speed - Stockton, CA

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).

Average humidity
Stockton, CA

Average humidity - Stockton, CA

The month with the highest relative humidity is January (73%).
The month with the lowest relative humidity is July (44%).

Average rainfall
Stockton, CA

Average rainfall - Stockton, CA

The wettest month (with the highest rainfall) is February (2.13").
The driest month (with the least rainfall) is August (0").

Average rainfall days
Stockton, CA

Average rainfall days - Stockton, CA

The month with the highest number of rainy days is March (12 days).
The month with the least rainy days is August (0.7 days).

Average snowfall days
Stockton, CA

Average snowfall days - Stockton, CA

The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

Average daylight / Average sunshine
Stockton, CA

Average daylight / Average sunshine - Stockton, CA

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

Average sunshine days
Stockton, CA

Average sunshine days - Stockton, CA

The month with the most sunshine days is August (30.2 days).
The month with the least sunshine days is March (17.8 days).

Average UV index
Stockton, CA

Average UV index - Stockton, CA

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average visibility
Stockton, CA

Average visibility - Stockton, CA

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Stockton, California, USA

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