Tomorrow in Santa Rosa looks
light rain, with a high of 58°
and an overnight low of 50°.
There is a 92% chance of rain - plan accordingly.
Winds top out near 8 mph,
and the UV index reaches 0 (low).
Santa Rosa averages 10.2 hours of sunshine per day, with July the brightest month. Temperatures peak in July and reach their annual low point in December.
Sunshine, rain and seasonal change
Rain and sunshine
About 727 mm (28.6 inches) falls across 60 wet days, with 10.2 hours of sunshine on an average day.
Seasonal change
July highs reach 86°F (30°C), while December lows fall to 42°F (5°C).
Typical day and night
Santa Rosa averages 72°F (22°C) by day and 49°F (10°C) at night across the year.
April to June and September to October is the sweet spot for Santa Rosa - the rains have stopped and the heat has not yet peaked. Expect 75°F (24°C) in the afternoon and around 3 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in April.
Does it snow in Santa Rosa?
Effectively no. The 2015-2024 record for Santa Rosa shows no regular measurable snowfall.
When is the dry season in Santa Rosa?
4 months average under 20 mm of rain, with July the driest at less than 1 mm.
Which month is coolest in Santa Rosa?
December, with highs of 58°F (15°C) and lows near 42°F (5°C). The coldest day in the 2015-2024 record fell to 27°F (-3°C).
When is monsoon season in Santa Rosa?
59% of the annual rainfall lands in the wettest three months, peaking in January. The dry end of the year sits around July, which averages less than 1 mm.
When is Santa Rosa at its hottest?
July, averaging 86°F (30°C) by day and 57°F (14°C) overnight. The hottest single day in our 2015-2024 record for this location reached 116°F (46°C).
Is Santa Rosa humid?
Relative humidity averages 68% across the year, which reads as fairly humid. Paired with July heat, muggy afternoons are routine.
What is the rainiest month in Santa Rosa?
January, at 6.4 inches (164 mm) over about 11 days. July is the driest month, at less than 1 mm.