Healdsburg Weather in September
Healdsburg in September sees high daytime temperatures of 29°C (84°F) and nighttime lows of 11°C (52°F). With just 4.8 mm (0.2 in) of rainfall expected, it's a dry month overall.
Rainfall in Healdsburg in September
Climate statistics over the past 30 years suggest around 2 days of rain, with 4.8 mm (0.2 in) average for the month. On the rare occasion it rains this month, it usually amounts to very little.
Temperature in Healdsburg in September
September is a perfect month in Healdsburg, with 29°C (84°F) during the day and 11°C (52°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Healdsburg in September
Expect sunny days throughout the month, with an estimated 275 hours of sunshine. This makes it a pleasant time to visit Healdsburg.So this is a great month to visit if you prefer dry days with pleasant temperatures.
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 Healdsburg's climate page.
Healdsburg Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
29°C (84°F)
Chance of Rain
5%
Precipitation
4.8 mm (0.2 in)
Rainy days
2 days
Sunshine
275 hours
Percentage Sunshine
77%
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Healdsburg typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are cool, with lows around 11°C (52°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Healdsburg in September
Browse day-by-day weather records for Healdsburg spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Healdsburg historical weather extremes in September
According to our 28 years of weather records for Healdsburg, the following extremes were recorded between 1997 and 2025.
- The warmest day in September was on September 6, 2022, with a maximum of 45°C (113°F).
- On September 9, 2008, Healdsburg saw its coldest September day with temperatures maxing out at 16°C (61°F).
- Healdsburg registered its coldest September night on September 30, 2019, with temperatures dropping to 4°C (39°F).
Best Places in the United States of America in September
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 September →
perfect weather
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tolerable
unpleasant
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What to Wear in Healdsburg in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. With minimal rainfall expected, you can leave the rain gear at home. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Healdsburg in September
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 Healdsburg's climate page.
See the full Healdsburg climate overview or explore weather in the United States of America.
