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Today Hourly 7 days 30 days September
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September 2025 Weather | San Mateo, California

Today 9/11
Cloudy Weather
Day 73°
Night 61°
5
Fri 9/12
Cloudy Weather
Day 75°
Night 61°
1
Sat 9/13
Cloudy Weather
Day 73°
Night 63°
0
Sun 9/14
Cloudy Weather
Day 75°
Night 61°
2
Mon 9/15
Sunny Weather
Day 82°
Night 61°
1
Tue 9/16
Sunny Weather
Day 84°
Night 59°
1
Wed 9/17
Sunny Weather
Day 81°
Night 63°
2
Thu 9/18
Cloudy Weather
Day 82°
Night 57°
1
Fri 9/19
Cloudy Weather
Day 75°
Night 57°
1
Sat 9/20
Cloudy Weather
Day 75°
Night 57°
4
Sun 9/21
Sunny Weather
Day 75°
Night 59°
0
Mon 9/22
Cloudy Weather
Day 73°
Night 57°
0
Tue 9/23
Cloudy Weather
Day 75°
Night 57°
0
Wed 9/24
Cloudy Weather
Day 77°
Night 55°
25
Thu 9/25
Cloudy Weather
Day 75°
Night 57°
25
Fri 9/26
Cloudy Weather
Day 79°
Night 57°
25
Sat 9/27
Cloudy Weather
Day 77°
Night 57°
25
Sun 9/28
Cloudy Weather
Day 77°
Night 57°
25
Mon 9/29
Cloudy Weather
Day 75°
Night 57°
25
Tue 9/30
Cloudy Weather
Day 73°
Night 57°
25