Best time to visit Sunol
The best time to visit Sunol is April–November, judged on twenty years of weather records and the events worth going for.
Sunol, California, United States
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 14.3 °C / 58 °F | 6.3 °C / 43 °F | 85 mm / 3.3 in | good month |
| February | 15.5 °C / 60 °F | 6.8 °C / 44 °F | 82 mm / 3.2 in | good month |
| March | 16.6 °C / 62 °F | 8 °C / 46 °F | 77 mm / 3 in | good month |
| April | 18.8 °C / 66 °F | 9.2 °C / 49 °F | 34 mm / 1.4 in | best month |
| May | 21.2 °C / 70 °F | 10.9 °C / 52 °F | 16 mm / 0.6 in | best month |
| June | 24.7 °C / 76 °F | 13.3 °C / 56 °F | 3 mm / 0.1 in | best month |
| July | 26.7 °C / 80 °F | 14.9 °C / 59 °F | 1 mm / 0.1 in | best month |
| August | 26.9 °C / 80 °F | 15.3 °C / 60 °F | 0 mm / 0 in | best month |
| September | 26.5 °C / 80 °F | 15 °C / 59 °F | 4 mm / 0.1 in | best month |
| October | 23.1 °C / 74 °F | 12.5 °C / 55 °F | 24 mm / 0.9 in | best month |
| November | 17.6 °C / 64 °F | 8.7 °C / 48 °F | 44 mm / 1.7 in | best month |
| December | 13.8 °C / 57 °F | 6.4 °C / 44 °F | 84 mm / 3.3 in | good month |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: good
- FFebruary: good
- MMarch: good
- AApril: best
- MMay: best
- JJune: best
- JJuly: best
- AAugust: best
- SSeptember: best
- OOctober: best
- NNovember: best
- DDecember: good
- Best
- April–November
- Good
- December–March
Why these months
January · good
In its favour: share of daylight that is sunny 77%, precipitation 85 mm / 3.3 in, average daily high 14.3 °C / 58 °F, wet days 8 days, days with heavy rain 2.9 days, average daily low 6.3 °C / 43 °F.
Against: feels like (high) 12.4 °C / 54 °F, relative humidity 78%.
February · good
In its favour: share of daylight that is sunny 82%, feels like (high) 13.4 °C / 56 °F, precipitation 82 mm / 3.2 in, average daily high 15.5 °C / 60 °F, wet days 7.7 days, days with heavy rain 2.7 days, average daily low 6.8 °C / 44 °F, relative humidity 74%.
March · good
In its favour: feels like (high) 15 °C / 59 °F, share of daylight that is sunny 82%, precipitation 77 mm / 3 in, average daily high 16.6 °C / 62 °F, days with heavy rain 2.9 days, wet days 9.8 days, average daily low 8 °C / 46 °F, relative humidity 74%.
April · best
In its favour: feels like (high) 18 °C / 64 °F, average daily high 18.8 °C / 66 °F, precipitation 34 mm / 1.4 in, share of daylight that is sunny 87%, wet days 5 days, days with heavy rain 1.4 days, average daily low 9.2 °C / 49 °F, relative humidity 72%.
May · best
In its favour: feels like (high) 20.9 °C / 70 °F, average daily high 21.2 °C / 70 °F, precipitation 16 mm / 0.6 in, share of daylight that is sunny 93%, wet days 2.5 days, days with heavy rain 0.5 days, average daily low 10.9 °C / 52 °F, relative humidity 70%.
June · best
In its favour: feels like (high) 25.2 °C / 77 °F, average daily high 24.7 °C / 76 °F, precipitation 3 mm / 0.1 in, share of daylight that is sunny 93%, wet days 0.6 days, days with heavy rain 0.1 days, average daily low 13.3 °C / 56 °F, relative humidity 67%.
July · best
In its favour: feels like (high) 27.9 °C / 82 °F, precipitation 1 mm / 0.1 in, share of daylight that is sunny 95%, average daily high 26.7 °C / 80 °F, wet days 0.2 days, days with heavy rain 0.1 days, average daily low 14.9 °C / 59 °F, relative humidity 67%.
August · best
In its favour: feels like (high) 27.8 °C / 82 °F, precipitation 0 mm / 0 in, share of daylight that is sunny 95%, average daily high 26.9 °C / 80 °F, wet days 0.1 days, days with heavy rain 0 days, average daily low 15.3 °C / 60 °F, relative humidity 68%.
September · best
In its favour: feels like (high) 26.5 °C / 80 °F, precipitation 4 mm / 0.1 in, share of daylight that is sunny 95%, average daily high 26.5 °C / 80 °F, wet days 0.8 days, days with heavy rain 0.1 days, average daily low 15 °C / 59 °F, relative humidity 67%.
October · best
In its favour: feels like (high) 21.9 °C / 71 °F, average daily high 23.1 °C / 74 °F, precipitation 24 mm / 0.9 in, share of daylight that is sunny 90%, wet days 2.8 days, days with heavy rain 0.7 days, average daily low 12.5 °C / 55 °F, relative humidity 67%.
November · best
In its favour: feels like (high) 16 °C / 61 °F, precipitation 44 mm / 1.7 in, share of daylight that is sunny 85%, average daily high 17.6 °C / 64 °F, wet days 6 days, days with heavy rain 1.4 days, average daily low 8.7 °C / 48 °F, relative humidity 75%.
December · good
In its favour: share of daylight that is sunny 76%, precipitation 84 mm / 3.3 in, average daily high 13.8 °C / 57 °F, wet days 8.9 days, days with heavy rain 2.9 days, average daily low 6.4 °C / 44 °F.
Against: feels like (high) 11.9 °C / 53 °F, relative humidity 80%.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: best
- FFebruary: best
- MMarch: best
- AApril: best
- MMay: best
- JJune: best
- JJuly: good
- AAugust: good
- SSeptember: good
- OOctober: best
- NNovember: best
- DDecember: best
- Best
- October–June
- Good
- July–September
Why these months
January · best
In its favour: average daily high 14.3 °C / 58 °F, precipitation 85 mm / 3.3 in, wet days 8 days, feels like (high) 12.4 °C / 54 °F, average daily low 6.3 °C / 43 °F, share of daylight that is sunny 77%, days with heavy rain 2.9 days, wind (daily max) 11 km/h / 7 mph.
Against: daylight per day 9.9 h.
February · best
In its favour: average daily high 15.5 °C / 60 °F, precipitation 82 mm / 3.2 in, wet days 7.7 days, feels like (high) 13.4 °C / 56 °F, average daily low 6.8 °C / 44 °F, share of daylight that is sunny 82%, days with heavy rain 2.7 days, daylight per day 10.8 h, wind (daily max) 13 km/h / 8 mph.
March · best
In its favour: average daily high 16.6 °C / 62 °F, precipitation 77 mm / 3 in, feels like (high) 15 °C / 59 °F, average daily low 8 °C / 46 °F, wet days 9.8 days, share of daylight that is sunny 82%, daylight per day 12 h, days with heavy rain 2.9 days, wind (daily max) 13 km/h / 8 mph.
April · best
In its favour: average daily high 18.8 °C / 66 °F, precipitation 34 mm / 1.4 in, wet days 5 days, days with heavy rain 1.4 days, feels like (high) 18 °C / 64 °F, average daily low 9.2 °C / 49 °F, share of daylight that is sunny 87%, daylight per day 13.2 h, wind (daily max) 14 km/h / 8 mph.
May · best
In its favour: average daily high 21.2 °C / 70 °F, precipitation 16 mm / 0.6 in, wet days 2.5 days, days with heavy rain 0.5 days, feels like (high) 20.9 °C / 70 °F, average daily low 10.9 °C / 52 °F, share of daylight that is sunny 93%, daylight per day 14.2 h, wind (daily max) 14 km/h / 9 mph.
June · best
In its favour: precipitation 3 mm / 0.1 in, wet days 0.6 days, days with heavy rain 0.1 days, average daily high 24.7 °C / 76 °F, average daily low 13.3 °C / 56 °F, share of daylight that is sunny 93%, daylight per day 14.7 h, wind (daily max) 13 km/h / 8 mph, feels like (high) 25.2 °C / 77 °F.
July · good
In its favour: precipitation 1 mm / 0.1 in, wet days 0.2 days, days with heavy rain 0.1 days, share of daylight that is sunny 95%, daylight per day 14.5 h, average daily low 14.9 °C / 59 °F, wind (daily max) 11 km/h / 7 mph.
Against: average daily high 26.7 °C / 80 °F, feels like (high) 27.9 °C / 82 °F.
August · good
In its favour: precipitation 0 mm / 0 in, wet days 0.1 days, days with heavy rain 0 days, share of daylight that is sunny 95%, daylight per day 13.6 h, average daily low 15.3 °C / 60 °F, wind (daily max) 11 km/h / 7 mph.
Against: average daily high 26.9 °C / 80 °F, feels like (high) 27.8 °C / 82 °F.
September · good
In its favour: precipitation 4 mm / 0.1 in, wet days 0.8 days, days with heavy rain 0.1 days, share of daylight that is sunny 95%, daylight per day 12.4 h, average daily low 15 °C / 59 °F, wind (daily max) 11 km/h / 7 mph.
Against: average daily high 26.5 °C / 80 °F, feels like (high) 26.5 °C / 80 °F.
October · best
In its favour: average daily high 23.1 °C / 74 °F, precipitation 24 mm / 0.9 in, wet days 2.8 days, days with heavy rain 0.7 days, feels like (high) 21.9 °C / 71 °F, average daily low 12.5 °C / 55 °F, share of daylight that is sunny 90%, daylight per day 11.2 h, wind (daily max) 11 km/h / 7 mph.
November · best
In its favour: average daily high 17.6 °C / 64 °F, precipitation 44 mm / 1.7 in, wet days 6 days, days with heavy rain 1.4 days, feels like (high) 16 °C / 61 °F, average daily low 8.7 °C / 48 °F, share of daylight that is sunny 85%, wind (daily max) 11 km/h / 7 mph, daylight per day 10.2 h.
December · best
In its favour: average daily high 13.8 °C / 57 °F, precipitation 84 mm / 3.3 in, wet days 8.9 days, feels like (high) 11.9 °C / 53 °F, average daily low 6.4 °C / 44 °F, share of daylight that is sunny 76%, days with heavy rain 2.9 days, wind (daily max) 11 km/h / 7 mph.
Against: daylight per day 9.6 h.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Dodge Ridge Ski Area, 183 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 12.4 °C | 13.4 °C | 15 °C | 18 °C | 20.9 °C | 25.2 °C | 27.9 °C | 27.8 °C | 26.5 °C | 21.9 °C | 16 °C | 11.9 °C |
| Days with heavy rain | 2.9 days | 2.7 days | 2.9 days | 1.4 days | 0.5 days | 0.1 days | 0.1 days | 0 days | 0.1 days | 0.7 days | 1.4 days | 2.9 days |
| Time rain usually falls | 4 pm | 3 pm | 3 pm | 4 pm | 3 pm | 2 pm | 3 am | 12 pm | 3 pm | 5 pm | 12 pm | 5 pm |
| Sunshine per day | 7.7 h | 8.9 h | 9.8 h | 11.5 h | 13.2 h | 13.7 h | 13.8 h | 12.9 h | 11.8 h | 10.1 h | 8.7 h | 7.3 h |
| Relative humidity | 78% | 74% | 74% | 72% | 70% | 67% | 67% | 68% | 67% | 67% | 75% | 80% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 12.9 µg/m³ | 13.4 µg/m³ | 10.5 µg/m³ | 11.8 µg/m³ | 9.1 µg/m³ | 9.5 µg/m³ | 10.5 µg/m³ | 10.5 µg/m³ | 11.6 µg/m³ | 12.7 µg/m³ | 14.2 µg/m³ | 16.3 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 23.4 µg/m³ | 23.1 µg/m³ | 18.5 µg/m³ | 17.8 µg/m³ | 12.8 µg/m³ | 12.5 µg/m³ | 14 µg/m³ | 14.1 µg/m³ | 16.9 µg/m³ | 19.7 µg/m³ | 23.6 µg/m³ | 27.6 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.