Baby clothes in San Jose, CA: the weather each month
In shortIn San Jose, CA, the average temperature goes from 51 °F (10.4 °C) in December to 71 °F (21.8 °C) in August, a swing of 21 °F (11.4 °C). Here the birth month does not change the clothes: a baby born on the 15th of any month needs 7 long-sleeve bodysuits by 6 months.
The typical weather in San Jose
| Month | Average | Low | High |
|---|---|---|---|
| January | 51 °F (10.6 °C) | 43 °F (6.3 °C) | 59 °F (15.0 °C) |
| February | 54 °F (12.3 °C) | 45 °F (7.4 °C) | 63 °F (17.1 °C) |
| March | 57 °F (13.9 °C) | 48 °F (8.7 °C) | 66 °F (19.1 °C) |
| April | 60 °F (15.5 °C) | 50 °F (9.9 °C) | 70 °F (21.1 °C) |
| May | 64 °F (17.8 °C) | 53 °F (11.8 °C) | 75 °F (23.8 °C) |
| June | 69 °F (20.3 °C) | 57 °F (13.9 °C) | 80 °F (26.7 °C) |
| July | 71 °F (21.4 °C) | 59 °F (15.1 °C) | 82 °F (27.9 °C) |
| August | 71 °F (21.8 °C) | 60 °F (15.4 °C) | 83 °F (28.2 °C) |
| September | 70 °F (21.0 °C) | 58 °F (14.6 °C) | 81 °F (27.4 °C) |
| October | 64 °F (17.9 °C) | 54 °F (12.1 °C) | 75 °F (23.7 °C) |
| November | 56 °F (13.4 °C) | 47 °F (8.4 °C) | 65 °F (18.3 °C) |
| December | 51 °F (10.4 °C) | 43 °F (6.0 °C) | 59 °F (14.9 °C) |
Typical weather, the average of many years; not a forecast. Climate normals: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020, station SAN JOSE, CA US (USC00047821). Palecki, M., Durre, I., Applequist, S., Arguez, A., Lawrimore, J. (2021). U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). https://doi.org/10.25921/wck8-er13. Accessed 2026-10-13.
What a baby born in San Jose needs, by birth month
The birth month does not change the clothes: a baby born on the 15th of any month needs 7 long-sleeve bodysuits, 7 short-sleeve bodysuits, and 2 fleece sleepers by 6 months.
Without heating at home, a baby born on October 15 would need 12 long-sleeve bodysuits.
Cotokim's list engine, balanced style, laundry every 2 days, for 1 baby born on the 15th of each month, with a clothes dryer and a home heated in winter (the tool's starting answers in this country). A month is cold when its average is below 64 °F (18 °C), and hot from 75 °F (24 °C) up. The exact due date changes the numbers a little; the tool does the math for your month.
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The list for your baby in San Jose
Pick the due month: the list follows the weather of each month your baby wears each size, with the reason behind every number.
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