San Joaquin County, CA Weather Forecast
County weather hub
Sunny
Compare major city weather across San Joaquin County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 84. North northwest wind around 3 mph.
County Weather Overview
This county weather page brings together forecast coverage for San Joaquin County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 10 of 10 mapped cities in San Joaquin County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 14, 2026 7:21 PM PDT
- Forecast office
- STO
- Source
- NOAA / NWS
Daily Outlook
This Week in San Joaquin County
Saturday looks like the warmest upcoming period in San Joaquin County at 90 degrees F.
Sunday Night is the coolest period ahead with temperatures near 52 degrees F.
The strongest winds are forecast for Monday at about 3 to 7 mph W.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 7:21 PM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- STO
- Radar station
- KDAX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Clear, with a low around 55. Northwest wind 0 to 3 mph.
Sunny, with a high near 88. West northwest wind around 3 mph.
Clear, with a low around 57.
Sunny, with a high near 90.
Clear, with a low around 57.
Sunny, with a high near 85.
Mostly clear, with a low around 52.
Sunny, with a high near 74.
Partly cloudy, with a low around 53.
A slight chance of rain after 5pm. Mostly sunny, with a high near 72.
A slight chance of rain before 11pm. Partly cloudy, with a low around 53.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Sunny
|
84°F |
3 mph
NNW
|
|
Thursday Night
Oct 15
|
Clear
|
55°F |
0 to 3 mph
NW
|
|
Friday
Oct 16
|
Sunny
|
88°F |
3 mph
WNW
|
|
Friday Night
Oct 16
|
Clear
|
57°F |
2 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
90°F |
0 to 5 mph
NNE
|
|
Saturday Night
Oct 17
|
Clear
|
57°F |
0 to 5 mph
NW
|
|
Sunday
Oct 18
|
Sunny
|
85°F |
1 to 6 mph
WNW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
52°F |
6 mph
WNW
|
|
Monday
Oct 19
|
Sunny
|
74°F |
3 to 7 mph
W
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
53°F |
7 mph
W
|
|
Tuesday
Oct 20
|
Mostly Sunny then Slight Chance Light Rain
|
72°F |
7 mph
WNW
|
|
Tuesday Night
Oct 20
|
Slight Chance Light Rain then Partly Cloudy
|
53°F |
6 mph
WNW
|
Major City Forecasts
Live forecast snapshots for major cities across San Joaquin County.
Coverage
Forecast coverage currently spans 10 of 10 mapped cities in San Joaquin County.
Largest mapped city population in this region: 312,716.
