Stockton, CA weather in September
September in Stockton: hot and dry. Highs 90°F, lows 58°F, about 1 day with rain.
- Normal high
- 90°F
- Normal low
- 58°F
- Wet days
- 1
- 0.08 in total
- Muggy days
- 0
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 93°F | 87°F |
| Normal low | 59°F | 55°F |
| Chance of a wet day | 1% | 4% |
| Sunrise / sunset | 6:35 am / 7:35 pm | 7:00 am / 6:50 pm |
| Daylight | 13.0 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical September day
- 6 am58°Fdew point 51°F
- 9 am72°Fdew point 52°F
- Noon83°Fdew point 51°F
- 3 pm88°Fdew point 50°F
- 6 pm81°Fdew point 50°F
- 9 pm70°Fdew point 51°F
NOAA hourly normals (local standard time) from Stockton Metro Airport (6 mi away); average wind 7 mph; clear or few clouds in 94% of daytime hours, mostly cloudy or overcast in 4%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F3 of 30
- Hot dayshigh 90°F or more16 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow1 of 30
- Notable rainat least 0.10 in0 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 0.08 in; a dry September brings about 0.0 in and a wet one about 0.1 in (25th and 75th percentiles). Days with half an inch or more are rare.
How September varies from year to year
- Warmest September, 1991-20202020: average high 93°F
- Coolest September2013: average high 85°F
- Wettest September2014: 0.6 in
- Driest September1991: no measurable precipitation
- Highest reading111°F (September 7, 2020)
- Lowest reading45°F (September 30, 2007)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 94°F | 90°F | 80°F |
| Normal low | 60°F | 58°F | 51°F |
| Wet days | 0 | 1 | 3 |
| Comfortable days | 1 | 3 | 16 |
| Daylight | 13.6 h | 12.4 h | 11.2 h |
Highs change by -4°F from August and -10°F into October.
Nearby alternatives in September
- Cooler: Concord, CA40 mi · high 84°F · 1 wet day
How Stockton ranks in September
- Normal high41st warmest of 378 cities; 18th of 60 in California
- Wet days30th driest of 378
- Comfortable days230th most of 342
What to pack for Stockton in September
- Light, breathable clothing – highs near 90°F
- Layers – afternoons near 90°F but nights near 58°F
Heating and cooling
September has 3 heating degree days and 271 cooling degree days (base 65°F), 7% of the year's total heating and cooling demand.
Questions
How hot is Stockton in September?
The normal high is 90°F and the normal low is 58°F. From 1991 to 2020 the hottest September reading was 111°F (September 7, 2020).
Does it rain a lot in Stockton in September?
About 1 days in September have at least 0.01 in of precipitation, and the normal total is 0.08 in. The wettest September in 1991-2020 was in 2014 (0.6 in); the driest was in 1991, with no measurable precipitation.
Is September a good time to visit Stockton?
September ranks 8th of 12 months on our comfort score for Stockton (47 out of 100). It has about 3 comfortable days and about 16 days at 90°F or hotter. The best month is April.
Where the numbers come from
- Temperature, rain, frost dates, humidity and wind by hour and cloud cover: Stockton Metro Airport (USW00023237), 5.9 mi SE of the city center, 26 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Stockton Fire Stn 4 (USC00048560), 3.2 mi NNW of the city center, 12 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Stockton Metropolitan Airport (724920-23237), 5.9 mi SE of the city center, 27 ft . Hourly observations, 1991-2020.