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Best time to visit · California, United States
For the most comfortable weather in Healdsburg, aim for May – October. June tops our comfort score at 100/100, with highs around 72°F (22°C) and 0.4 in (9 mm) of rain. April and November are good shoulder-season months. The toughest month is December, mainly because of rain.
Highs run from 56°F to 76°F across the year, and the yearly total is about 36.7 in (931 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 56°F13°C | 57°F14°C | 59°F15°C | 61°F16°C | 66°F19°C | 72°F22°C | 76°F24°C | 76°F25°C | 76°F24°C | 71°F21°C | 62°F17°C | 56°F13°C |
| Avg low | 45°F7°C | 45°F7°C | 47°F8°C | 47°F9°C | 50°F10°C | 53°F12°C | 56°F13°C | 56°F14°C | 56°F14°C | 53°F12°C | 48°F9°C | 45°F7°C |
| Rain | 6.5 in164 mm | 6.3 in160 mm | 5.2 in131 mm | 2.5 in64 mm | 1.2 in30 mm | 0.4 in9 mm | 0.0 in1 mm | 0.0 in1 mm | 0.2 in5 mm | 1.9 in49 mm | 4.0 in101 mm | 8.5 in216 mm |
| Humidity | 84% | 84% | 83% | 81% | 78% | 70% | 66% | 66% | 62% | 66% | 76% | 83% |
| Cloud | 55% | 53% | 52% | 44% | 35% | 22% | 19% | 21% | 21% | 31% | 45% | 57% |
| Comfort | 63 | 66 | 73 | 87 | 98 | 100 | 100 | 100 | 100 | 99 | 84 | 56 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 173 m (568 ft), close to Healdsburg's own ~32 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The cold peaks here: highs of 56–57°F (13–14°C), and nights reach 45°F (7°C). It's the wettest season, with about 21.3 in (540 mm) of rain, 58% of the year's total. It holds the toughest stretch on our comfort score (December), averaging 62/100.
Temperatures climb through the season, from 59°F highs in March to 66°F by May. About 8.9 in (225 mm) of rain falls across these months, 24% of the year's total. Lows bottom out around 47°F (8°C). May is among the best-scoring months (season average 86/100).
Peak warmth: highs of 72–76°F (22–25°C). It's the driest season, with only about 0.4 in (11 mm) of rain, 1% of the year's total. Lows bottom out around 53°F (12°C). Comfort peaks here: June – August rank with the year's best, and the season averages 100/100.
Temperatures slide from 76°F highs in September to 62°F by November. About 6.1 in (155 mm) of rain falls across these months, 17% of the year's total. Lows bottom out around 48°F (9°C). September & October are among the best-scoring months (season average 94/100).
By comfort score: 8 Great, 3 Good and 1 Fair. Great months: April – November. Tap a month for its own guide.
For the most comfortable weather in Healdsburg, aim for May – October. June tops our comfort score at 100/100, with highs around 72°F (22°C) and 0.4 in (9 mm) of rain. April and November are good shoulder-season months. The toughest month is December, mainly because of rain.
December is the wettest month, averaging about 8.5 in (216 mm) of rain. July is the driest, with less than 0.1 in (3 mm). The yearly total is around 36.7 in (931 mm).
January is the coldest, with average lows of 45°F (7°C) and highs of 56°F (13°C). The warmest is August, with average highs of 76°F (25°C).
Not very: summer (June – August) humidity averages 67%, and highs peak around 76°F (25°C), so it rarely feels sticky.
The wettest three-month stretch is December – February, with about 21.3 in (540 mm) of rain combined. The driest stretch is July – September, with about 0.3 in (7 mm).
Poll the group on May – October dates, then plan the days, packing and costs together.
