Booking 43 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to San Jose. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
One of the essential ways to save on airfare from Seattle to San Jose is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 31% on airfare.
The most flights from SEA to SJC are scheduled on a Friday (47 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (15 on average).
In terms of precipitation, rainfall in San Jose ranges from 0.0 - 79.0 inches per month. January is typically the wettest month, when rainfall can reach 79.0 mm. July is typically the driest time to visit San Jose when rainfall is around 0.0 mm.
If weather is an important factor for your trip to San Jose, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 10.0 C).
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