Stockton, CA Climate & Monthly Averages
Stockton has a Mediterranean climate. July is the hottest month, averaging 96° by day; December is the coldest at 56°.
Sunshine is a defining feature of Stockton's climate
Stockton runs on a dry-summer rhythm: the warmest months are also the driest. July averages less than 1 mm while the wet season peaks in December at 4.5 inches (113 mm). Highs range from 56°F (13°C) to 96°F (36°C).
How sun, temperature and rain fit together
5 months average under 20 mm of rain, the longest unbroken stretch running May through September. December sits at the other end of the year: 56°F (13°C) by day, 41°F (5°C) at night. At its warmest, in July, Stockton runs to 96°F (36°C) in the afternoon and back to 63°F (17°C) by dawn. Sunshine averages 10.5 hours a day over the year - sunnier than roughly 82% of the cities we track, peaking in July at 13.9 hours.
Relative humidity averages 62% across the year, drier than about 83% of the cities we track. Days and nights are about 14°C apart on average - wider than 97% of the 3496 cities in our dataset. Precipitation concentrates in December - 4.5 inches (113 mm) on 10 days - and thins out by July. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 119°F (48°C) and the lowest daily minimum 28°F (-2°C).
More climate facts for Stockton
- Hottest month: July - highs near 96°F (36°C)
- Coldest month: December - highs near 56°F (13°C)
- Decade extremes (2015-2024): 119°F (48°C) high · 28°F (-2°C) low
- Wettest month: December (10 rainy days) · Sunniest: July (13.9 h sun/day)
- Climate type: Mediterranean
- Annual swing: 17°C between the average warmest and coolest month · day to night: 14°C
- Months averaging 30°C or hotter: 4
- Average humidity: 62%
The most comfortable sunny-weather window
Best time to visit Stockton
April to May and October to November is the sweet spot for Stockton - the dry season is running but the afternoons are still bearable. Expect 72°F (22°C) in the afternoon and around 4 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in April.
What to pack
Pack for Stockton with lightweight, breathable clothing and serious sun protection, a warm jacket and layers for the cooler season and rain gear if you travel around December. July nights average 63°F (17°C), so evenings rarely match the afternoons.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 57° | 41° | 10 | 4.3 in | 6.4 h/day | 9.8 h | 32% | 84% |
| February | 61° | 42° | 7 | 3.0 in | 8.8 h/day | 10.7 h | 25% | 73% |
| March | 65° | 45° | 10 | 3.5 in | 9.5 h/day | 11.8 h | 32% | 71% |
| April | 73° | 50° | 4 | 1.4 in | 11.3 h/day | 13.1 h | 15% | 61% |
| May | 81° | 54° | 3 | 0.7 in | 13.1 h/day | 14.2 h | 8% | 53% |
| June | 91° | 60° | 0 | 0.1 in | 13.7 h/day | 14.8 h | 2% | 46% |
| July | 96° | 63° | 0 | 0.0 in | 13.9 h/day | 14.5 h | 1% | 45% |
| August | 95° | 63° | 0 | 0.0 in | 13.0 h/day | 13.6 h | 0% | 48% |
| September | 90° | 61° | 1 | 0.3 in | 11.7 h/day | 12.4 h | 4% | 50% |
| October | 80° | 54° | 2 | 1.2 in | 10.1 h/day | 11.1 h | 8% | 54% |
| November | 64° | 45° | 6 | 2.1 in | 8.1 h/day | 10.1 h | 20% | 71% |
| December | 56° | 41° | 10 | 4.5 in | 6.3 h/day | 9.5 h | 32% | 82% |
Stockton month by month
Each card shows the average high and low. The bar places that month between Stockton's coldest night and warmest afternoon.
January
- Rain
- 10 days
- Sunshine
- 6.4 h
- Daylight
- 9.8 h
February
- Rain
- 7 days
- Sunshine
- 8.8 h
- Daylight
- 10.7 h
March
- Rain
- 10 days
- Sunshine
- 9.5 h
- Daylight
- 11.8 h
April
- Rain
- 4 days
- Sunshine
- 11.3 h
- Daylight
- 13.1 h
May
- Rain
- 3 days
- Sunshine
- 13.1 h
- Daylight
- 14.2 h
June
- Rain
- 0 days
- Sunshine
- 13.7 h
- Daylight
- 14.8 h
July
- Rain
- 0 days
- Sunshine
- 13.9 h
- Daylight
- 14.5 h
August
- Rain
- 0 days
- Sunshine
- 13.0 h
- Daylight
- 13.6 h
September
- Rain
- 1 day
- Sunshine
- 11.7 h
- Daylight
- 12.4 h
October
- Rain
- 2 days
- Sunshine
- 10.1 h
- Daylight
- 11.1 h
November
- Rain
- 6 days
- Sunshine
- 8.1 h
- Daylight
- 10.1 h
December
- Rain
- 10 days
- Sunshine
- 6.3 h
- Daylight
- 9.5 h
Looking for warmer alternatives? Browse warm places by month, or compare Stockton's coolest part of the year: December, January, February.
Seasonal weather under Stockton's sunnier skies
Spring (March through May)
Spring in Stockton is mild and warm, with daytime highs averaging 73°F (23°C) and nights around 50°F (10°C); rain comes on about 17 days over the three months. Daylight is generous - around 11.3 hours of sun a day.
Summer (June through August)
Through summer, Stockton is punishingly hot: 94°F (34°C) by day, 62°F (17°C) after dark, and precipitation is essentially absent. Daylight is generous - around 13.5 hours of sun a day.
Fall (September through November)
Fall in Stockton is mild and warm, with daytime highs averaging 78°F (26°C) and nights around 53°F (12°C); rain comes on about 9 days over the three months.
Winter (December through February)
Winter is mild here - highs near 58°F (14°C), nights near 41°F (5°C), and expect showers on roughly 27 days across the season.
How unusual is Stockton?
- Rain or snow reaches the ground on 54 days a year - fewer wet days than all but 10% of the 3496 cities we track.
These comparisons use the same ten-year window for every city in the dataset.
Stockton temperature extremes in the 2015–2024 dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.