Petaluma Weather in January
January in Petaluma typically sees daytime highs of 15°C (59°F) and nighttime lows of 3°C (37°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the winter season.
Rainfall in Petaluma in January
Typically around 9 days of rainfall are expected, averaging 101 mm (4 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Petaluma in January
In January, Petaluma gets moderate temperatures, with highs of 15°C (59°F). Nights cool to around 3°C (37°F). Experience the winter season in January. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 3°C (37°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Petaluma in January
There are approximately 190 hours of sunshine this month, resulting in mostly clear days. Despite the cool temperatures, the sunshine makes it an enjoyable time to be outside.If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Petaluma. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Petaluma's climate page.
Petaluma Temperature in January
Min Temperature
3°C (37°F)
Max Temperature
15°C (59°F)
Chance of Rain
31%
Precipitation
101 mm (4 in)
Rainy days
9 days
Sunshine
190 hours *
Percentage Sunshine
60% *
Best Places in the United States of America in January
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in January →
perfect weather
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tolerable
unpleasant
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What to Wear in Petaluma in January
The weather can swing between comfortable and chilly in January, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Expect heavy rainfall, so bring good rain protection and waterproof bags. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Petaluma in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Petaluma's climate page.
See the full Petaluma climate overview or explore weather in the United States of America.
