Union Square, CA Weather Forecast & Current Conditions

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Union Square, CA Weather Maps

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Union Square Weather Map
UTC Time: 9/21/2026, 20:32
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Union Square, CA

Today
Sunny
83°/ 54° 28°/ 12°
0%
Tuesday
Sunny
85°/ 54° 29°/ 12°
0%
Wednesday
Sunny
91°/ 62° 33°/ 17°
0%
Thursday
Sunny
94°/ 61° 34°/ 16°
0%
Fri Night
Clear
57°14°
0%
Sat Night
Clear
57°14°
0%
Sunday
Sunny
83°28°
0%

Day: Mostly sunny. Highs around 83. Light winds.

Night: Clear. Lows around 54. West winds up to 10 mph in the evening becoming light.

San Joaquin County Delta, CA

Today
Sunny
81°/ 54° 27°/ 12°
0%
Tuesday
Sunny
84°/ 56° 29°/ 13°
0%
Wednesday
Sunny
87°/ 62° 31°/ 17°
0%
Thursday
Sunny
89°/ 60° 32°/ 16°
0%
Fri Night-Sat
Clear
57°14°
0%
Sat Night-Sun
Clear
56°13°
0%

Day: Mostly sunny. Highs around 81. West winds up to 10 mph with gusts to around 20 mph.

Night: Clear. Lows around 54. West winds up to 10 mph with gusts to around 20 mph.

Tracy, CA

Today
Sunny
82°/ 54° 28°/ 12°
0%
Tuesday
Sunny
85°/ 55° 29°/ 13°
0%
Wednesday
Sunny
90°/ 61° 32°/ 16°
0%
Thursday
Sunny
93°/ 60° 34°/ 16°
0%
Fri Night-Sat
Clear
57°14°
0%
Sat Night
Clear
55°13°
0%
Sunday
Sunny
82°28°
0%

Day: Mostly sunny. Highs around 82. West winds up to 10 mph with gusts to around 25 mph.

Night: Clear. Lows 54 to 59. West winds up to 10 mph. Gusts up to 25 mph in the evening.

East Bay Interior Valleys, CA

Today
Sunny
75°/ 55° 24°/ 13°
0%
Tuesday
Sunny
85°/ 58° 29°/ 14°
0%
Wednesday
Sunny
92°/ 62° 33°/ 17°
0%
Thu-Thu Night
Clear
92°33°
0%
Friday
Clear
82°28°
0%
Saturday
Clear
82°28°
0%
Sunday
Clear
82°28°
0%

Day: Sunny. Highs in the mid 70s to lower 80s. West winds 5 to 15 mph.

Night: Mostly clear in the evening then becoming partly cloudy. Lows in the mid 50s. Southwest winds 5 to 15 mph.

Modesto, CA

Today
Sunny
83°/ 56° 28°/ 13°
0%
Tuesday
Sunny
85°/ 58° 29°/ 14°
0%
Wednesday
Sunny
90°/ 63° 32°/ 17°
0%
Thursday
Sunny
94°/ 62° 34°/ 17°
0%
Friday
Sunny
87°/ 58° 31°/ 14°
0%
Saturday
Clear
58°14°
0%
Sunday
Clear
58°14°
0%

Day: Mostly sunny. Highs around 83. Northwest winds up to 10 mph.

Night: Clear. Lows around 56. Northwest winds up to 10 mph.

Lincoln, CA

Today
Sunny
82°/ 52° 28°/ 11°
0%
Tuesday
Sunny
85°/ 54° 29°/ 12°
0%
Wednesday
Sunny
91°/ 59° 33°/ 15°
0%
Thursday
Sunny
93°/ 57° 34°/ 14°
0%
Fri Night
Clear
55°13°
0%
Saturday
Clear
83°28°
0%
Sunday
Clear
83°28°
0%

Day: Mostly sunny. Highs around 82. South winds up to 10 mph with gusts to around 20 mph.

Night: Clear. Lows 52 to 58. South winds up to 10 mph with gusts to around 20 mph.

Walnut Grove, CA

Today
Sunny
75°/ 52° 24°/ 11°
0%
Tuesday
Sunny
78°/ 54° 26°/ 12°
0%
Wednesday
Sunny
84°/ 59° 29°/ 15°
0%
Thursday
Sunny
86°/ 57° 30°/ 14°
0%
Fri Night
Clear
55°13°
0%
Saturday
Clear
77°25°
0%
Sunday
Clear
77°25°
0%

Day: Mostly sunny. Highs 75 to 81. West winds 10 to 15 mph with gusts to around 25 mph.

Night: Clear. Lows 52 to 58. Southwest winds up to 15 mph.

NE San Joaquin Valley Below 1000 ft, CA

Today
Sunny
82°/ 54° 28°/ 12°
0%
Tuesday
Sunny
85°/ 58° 29°/ 14°
0%
Wednesday
Sunny
91°/ 62° 33°/ 17°
0%
Thursday
Sunny
95°/ 62° 35°/ 17°
0%
Fri Night-Sat
Clear
58°14°
0%
Sat Night-Sun
Clear
57°14°
0%

Day: Mostly sunny. Highs around 82. Northwest winds up to 10 mph.

Night: Clear. Lows 54 to 60. Northwest winds up to 10 mph.

Fairfield, CA

Today
Sunny
74°/ 56° 23°/ 13°
0%
Tuesday
Sunny
82°/ 57° 28°/ 14°
0%
Wednesday
Sunny
91°/ 61° 33°/ 16°
0%
Thursday
Sunny
90°/ 61° 32°/ 16°
0%
Fri Night
Clear
58°14°
0%
Saturday
Clear
81°27°
0%
Sunday
Clear
81°27°
0%

Day: Mostly sunny. Highs 74 to 80. Southwest winds 10 to 15 mph with gusts to around 30 mph.

Night: Clear. Lows around 56. Southwest winds 10 to 15 mph with gusts to around 25 mph.

W. Stanislaus County Above 1000 ft & I-5, CA

Today
Sunny
79°/ 56° 26°/ 13°
0%
Tuesday
Sunny
86°/ 57° 30°/ 14°
0%
Wednesday
Sunny
87°/ 62° 31°/ 17°
0%
Thursday
Sunny
91°/ 61° 33°/ 16°
0%
Fri Night
Clear
58°14°
0%
Sat Night
Clear
58°14°
0%
Sunday
Sunny
80°27°
0%

Day: Mostly sunny. Highs 79 to 84. Light winds. Gusts up to 20 mph.

Night: Clear. Lows around 56. Light winds.

East Bay Hills, CA

Today
Sunny
72°/ 52° 22°/ 11°
0%
Tuesday
Cloudy
78°/ 55° 26°/ 13°
0%
Wednesday
Sunny
90°/ 62° 32°/ 17°
0%
Thu-Thu Night
Clear
88°31°
0%
Friday
Clear
78°26°
0%
Saturday
Clear
78°26°
0%
Sunday
Clear
78°26°
0%

Day: Sunny. Highs in the lower 70s. Southwest winds around 10 mph.

Night: Mostly clear in the evening then becoming partly cloudy. Lows in the lower 50s. Southwest winds 10 to 15 mph.

Sonora, CA

Today
Cloudy
76°/ 53° 24°/ 12°
0%
Tuesday
Sunny
79°/ 57° 26°/ 14°
0%
Wednesday
Sunny
85°/ 60° 29°/ 16°
0%
Thursday
Sunny
87°/ 57° 31°/ 14°
0%
Fri Night
Clear
57°14°
0%
Saturday
Sunny
79°/ 55° 26°/ 13°
0%

Day: Mostly sunny in the morning then becoming partly cloudy. Haze and patchy smoke in the morning. Highs 76 to 82. Light winds becoming west up to 10 mph in the afternoon.

Night: Mostly clear. Lows 53 to 61. Light winds.

Cameron Park, CA

Today
Sunny
75°/ 54° 24°/ 12°
0%
Tuesday
Sunny
78°/ 59° 26°/ 15°
0%
Wednesday
Sunny
84°/ 63° 29°/ 17°
0%
Thursday
Sunny
85°/ 57° 29°/ 14°
0%
Friday
Clear
57°14°
0%
Sat Night
Clear
57°14°
0%
Sunday
Sunny
73°23°
0%

Day: Mostly sunny. Highs 75 to 81. Light winds.

Night: Mostly clear. Lows 54 to 59. Light winds.

Vallejo, CA

Today
Cloudy
67°/ 57° 19°/ 14°
0%
Tuesday
Cloudy
73°/ 57° 23°/ 14°
0%
Wednesday
Sunny
82°/ 57° 28°/ 14°
0%
Thursday
Sunny
80°/ 60° 27°/ 16°
0%
Fri Night
Clear
57°14°
0%
Saturday
Clear
72°22°
0%
Sunday
Clear
72°22°
0%

Day: Partly cloudy in the morning then clearing. Highs 67 to 77. Southwest winds 10 to 15 mph with gusts to around 25 mph.

Night: Mostly clear. Lows around 57. Southwest winds 10 to 15 mph with gusts to around 25 mph.

Woodland, CA

Today
Sunny
78°/ 54° 26°/ 12°
0%
Tuesday
Cloudy
85°/ 57° 29°/ 14°
0%
Wednesday
Sunny
90°/ 60° 32°/ 16°
0%
Thursday
Sunny
92°/ 58° 33°/ 14°
0%
Fri Night
Clear
56°13°
0%
Saturday
Clear
83°28°
0%
Sunday
Clear
83°28°
0%

Day: Mostly sunny. Highs 78 to 86. South winds up to 10 mph with gusts to around 20 mph.

Night: Clear. Lows around 54. South winds up to 10 mph with gusts to around 25 mph.

San Francisco Bay Shoreline, CA

Today
Mostly Cloudy
68°/ 58° 20°/ 14°
0%
Tuesday
Mostly Cloudy
70°/ 58° 21°/ 14°
0%
Wednesday
Cloudy
85°/ 60° 29°/ 16°
0%
Thursday
Sunny
85°/ 60° 29°/ 16°
0%
Fri Night
Clear
58°14°
0%
Saturday
Cloudy
70°/ 58° 21°/ 14°
0%
Sunday
Cloudy
70°21°
0%

Day: Mostly cloudy late in the morning then becoming sunny. Highs in the upper 60s to mid 70s. Southwest winds 5 to 10 mph...becoming west 10 to 20 mph in the afternoon.

Night: Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 50s. West winds 10 to 20 mph...becoming southwest 5 to 10 mph after midnight.

Eastern Santa Clara Hills, CA

Today
Sunny
72°/ 58° 22°/ 14°
0%
Tuesday
Sunny
75°/ 65° 24°/ 18°
0%
Wednesday
Sunny
82°/ 72° 28°/ 22°
0%
Thu-Thu Night
Clear
85°29°
0%
Friday
Clear
75°24°
0%
Sat Night
Clear
75°24°
0%
Sunday
Sunny
70°21°
0%

Day: Sunny. Highs in the lower 70s. South winds around 5 mph.

Night: Mostly clear. Lows in the 40s to upper 50s. Southwest winds around 5 mph.

Esparto, CA

Today
Sunny
82°/ 53° 28°/ 12°
0%
Tuesday
Sunny
87°/ 57° 31°/ 14°
0%
Wednesday
Sunny
91°/ 60° 33°/ 16°
0%
Thursday
Sunny
92°/ 58° 33°/ 14°
0%
Fri Night
Clear
56°13°
0%
Sat-Sat Night
Clear
83°28°
0%
Sunday
Sunny
82°28°
0%

Day: Sunny. Highs 82 to 88. Light winds becoming south up to 10 mph with gusts to around 20 mph in the afternoon.

Night: Clear. Lows 53 to 59. Southwest winds up to 10 mph with gusts to around 20 mph.

Pollock Pines, CA

Today
Cloudy
72°/ 49° 22°/
0%
Tuesday
Sunny
74°/ 52° 23°/ 11°
0%
Wednesday
Sunny
78°/ 55° 26°/ 13°
0%
Thursday
Sunny
78°/ 52° 26°/ 11°
0%
Friday
Clear
52°11°
0%
Sat Night
Clear
52°11°
0%
Sunday
Sunny
68°20°
0%

Day: Mostly sunny in the morning then becoming partly cloudy. Haze until late afternoon. Highs 72 to 80. Light winds.

Night: Mostly clear. Lows 49 to 59. Light winds.

Twain Harte, CA

Today
Rain
69°/ 51° 21°/ 11°
N/A
Tuesday
Sunny
72°/ 54° 22°/ 12°
0%
Wednesday
Sunny
77°/ 56° 25°/ 13°
0%
Thursday
Sunny
78°/ 54° 26°/ 12°
0%
Fri Night
Clear
54°12°
0%
Saturday
Sunny
71°/ 52° 22°/ 11°
0%

Day: Haze and patchy smoke until late afternoon. Partly cloudy until late afternoon, then mostly cloudy with a slight chance of rain late in the afternoon. Highs 69 to 79. Light winds becoming west up to 10 mph in the afternoon.

Night: Partly cloudy in the evening then clearing. Lows 51 to 61. Light winds.

Names listed above may include county names.

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