San Mateo to Chicago Time Difference
Chicago is 1 hour behind San Mateo
24-Hour Comparison
Business hours Extended Off hours
San Mateo
04p
05p
06p
07p
08p
09p
10p
11p
12a
01a
02a
03a
04a
05a
06a
07a
08a
09a
10a
11a
12p
01p
02p
03p
Chicago
03p
04p
05p
06p
07p
08p
09p
10p
11p
12a
01a
02a
03a
04a
05a
06a
07a
08a
09a
10a
11a
12p
01p
02p
Each column is the same moment in both cities, starting from right now and rolling forward 24 hours — daylight saving is already accounted for.
Best Time to Call
On a typical weekday (Monday–Friday).
- 04:00 PM – 05:00 PM in San Mateo03:00 PM – 04:00 PM in Chicago
- 10:00 AM – 04:00 PM in San Mateo09:00 AM – 03:00 PM in Chicago
Frequently Asked Questions
- What is the time difference between San Mateo and Chicago?
- Chicago is 1 hour behind San Mateo. San Mateo is currently UTC-4 and Chicago is UTC-5.
- Is Chicago ahead of or behind San Mateo?
- Chicago is behind San Mateo.
- What is the best time to call Chicago from San Mateo?
- On a typical weekday, the best time is 04:00 PM–05:00 PM in San Mateo (03:00 PM–04:00 PM in Chicago), 10:00 AM–04:00 PM in San Mateo (09:00 AM–03:00 PM in Chicago), when both cities are within business hours.
- Does the time difference between San Mateo and Chicago change during the year?
- Yes. San Mateo and Chicago don't switch to daylight saving time on the same schedule, so the offset shifts by up to an hour for part of the year.