Click on a day for an hourly weather forecast
The temperatures in San Mateo in January are quite cold with temperatures between 9°C and 15°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in San Mateo during the month of January. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in San Mateo in January 2025.
If you’re planning to visit San Mateo in the near future, we highly recommend that you review the 14 day weather forecast for San Mateo before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 9° | 6 | 25 | 0 | 92 mm | Good | San Mateo in January |
| February | 15° / 9° | 5 | 23 | 0 | 82 mm | Good | San Mateo in February |
| March | 16° / 9° | 7 | 24 | 0 | 85 mm | Ok | San Mateo in March |
| April | 17° / 10° | 3 | 27 | 0 | 35 mm | Good | San Mateo in April |
| May | 18° / 11° | 2 | 29 | 0 | 15 mm | Good | San Mateo in May |
| June | 21° / 13° | 1 | 29 | 0 | 4 mm | Good | San Mateo in June |
| July | 22° / 14° | 0 | 31 | 0 | 1 mm | Good | San Mateo in July |
| August | 23° / 15° | 0 | 31 | 0 | 0 mm | Perfect | San Mateo in August |
| September | 23° / 15° | 0 | 30 | 0 | 3 mm | Perfect | San Mateo in September |
| October | 21° / 14° | 2 | 29 | 0 | 28 mm | Good | San Mateo in October |
| November | 17° / 11° | 4 | 26 | 0 | 51 mm | Good | San Mateo in November |
| December | 14° / 9° | 6 | 25 | 0 | 101 mm | Good | San Mateo in December |