What is the warmest month in San Mateo County?
The warmest month is September with an average temperature of 75 °F over the past years.
Calculated from weather data of San Francisco International Airport (KSFO) between 2020 and 2024.
Month | Average | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|---|
January | 59.0 | 59.0 | 60.0 | 58.0 | 60.0 | 58.0 |
February | 61.0 | 60.0 | 58.0 | 64.0 | 63.0 | 64.0 |
March | 62.0 | 58.0 | 64.0 | 63.0 | 61.0 | |
April | 65.0 | 63.0 | 65.0 | 65.0 | 65.0 | |
May | 67.0 | 65.0 | 68.0 | 67.0 | 71.0 | |
June | 72.0 | 68.0 | 73.0 | 73.0 | 73.0 | |
July | 72.0 | 71.0 | 70.0 | 71.0 | 71.0 | |
August | 74.0 | 76.0 | 74.0 | 73.0 | 75.0 | |
September | 75.0 | 73.0 | 76.0 | 73.0 | 77.0 | |
October | 73.0 | 76.0 | 68.0 | 69.0 | 77.0 | |
November | 64.0 | 68.0 | 61.0 | 65.0 | 63.0 | |
December | 58.0 | 62.0 | 55.0 | 55.0 | 60.0 | |
Average | 66.0 | 60.0 | 66.0 | 67.0 | 66.0 | 68.0 |
Month | Average | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|---|
January | 48.0 | 49 | 49 | 46 | 48 | 47 |
February | 47.0 | 48 | 44 | 46 | 48 | 48 |
March | 48.0 | 47 | 48 | 48 | 49 | |
April | 51.0 | 49 | 50 | 51 | 51 | |
May | 53.0 | 54 | 52 | 53 | 54 | |
June | 56.0 | 56 | 56 | 58 | 56 | |
July | 57.0 | 56 | 57 | 57 | 56 | |
August | 59.0 | 60 | 58 | 58 | 58 | |
September | 59.0 | 60 | 60 | 57 | 59 | |
October | 55.0 | 58 | 54 | 55 | 56 | |
November | 50.0 | 54 | 46 | 53 | 48 | |
December | 48.0 | 51 | 44 | 47 | 47 | |
Average | 52.0 | 49.0 | 53.0 | 52.0 | 53.0 | 52.0 |
Number of days | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|
86 °F or warmer | 0 | 7 | 10 | 3 | 13 |
77 °F or warmer | 0 | 25 | 28 | 21 | 43 |
68 °F or warmer | 0 | 143 | 140 | 141 | 164 |
32 °F or colder | 0 | 0 | 0 | 0 | 0 |
Month | Average | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|---|
January | 9.5 | 14 | 17 | 0 | 5 | 3 |
February | 9.6 | 20 | 20 | 0 | 3 | 0 |
March | 7.9 | 24 | 1 | 2 | 6 | |
April | 1.9 | 0 | 2 | 1 | 4 | |
May | 1.5 | 3 | 0 | 0 | 2 | |
June | 0.1 | 0 | 1 | 0 | 0 | |
July | 0.0 | 0 | 0 | 0 | 0 | |
August | 0.2 | 1 | 0 | 0 | 1 | |
September | 0.2 | 0 | 2 | 0 | 0 | |
October | 0.7 | 1 | 0 | 5 | 0 | |
November | 3.3 | 2 | 5 | 2 | 1 | |
December | 7.1 | 11 | 17 | 12 | 3 | |
Average | 4.8 | 16.9 | 6.1 | 1.6 | 2.2 | 1.5 |
Month | Average | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|---|
January | 7.6 | 8 | 10 | 5 | 8 | 8 |
February | 9.6 | 9 | 10 | 8 | 9 | 9 |
March | 10.2 | 12 | 11 | 11 | 9 | |
April | 12.6 | 14 | 14 | 14 | 12 | |
May | 13.8 | 12 | 16 | 16 | 12 | |
June | 13.6 | 13 | 14 | 14 | 13 | |
July | 13.7 | 14 | 14 | 13 | 13 | |
August | 12.2 | 12 | 12 | 12 | 12 | |
September | 11.4 | 11 | 11 | 11 | 11 | |
October | 8.8 | 8 | 10 | 11 | 8 | |
November | 6.7 | 6 | 7 | 5 | 8 | |
December | 6.8 | 6 | 7 | 8 | 6 | |
Average | 10.5 | 8.6 | 10.7 | 11.1 | 11.2 | 10.2 |
Month | 2024 | 2023 | 2022 | 2021 | 2020 |
---|---|---|---|---|---|
January | SW | SE | E | N | NW |
February | S | W | NW | NW | NW |
March | SW | NW | W | W | |
April | W | W | W | W | |
May | W | W | W | W | |
June | W | NW | W | W | |
July | NW | NW | NW | NW | |
August | NW | NW | NW | NW | |
September | W | NW | NW | NW | |
October | NW | NW | W | NW | |
November | NW | W | N | NW | |
December | SE | S | SW | NW |
The warmest month is September with an average temperature of 75 °F over the past years.
The coldest month is December with an average daytime temperature of 58 °F in the past few years.
Chance of precipitation is the highest in February with a probability of around 9.7 %.
The least rainfall and snow can be expected in July. The probability is about 0.0 %.