Best time to visit Julian
The best time to visit Julian is March–May and October–November, judged on twenty years of weather records and the events worth going for.
Julian, 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 | 15.9 °C / 61 °F | 5.2 °C / 41 °F | 43 mm / 1.7 in | good month |
| February | 16.7 °C / 62 °F | 5.5 °C / 42 °F | 40 mm / 1.6 in | good month |
| March | 18.4 °C / 65 °F | 6.5 °C / 44 °F | 33 mm / 1.3 in | best month |
| April | 22 °C / 72 °F | 8.5 °C / 47 °F | 14 mm / 0.5 in | best month |
| May | 25.2 °C / 77 °F | 11.2 °C / 52 °F | 7 mm / 0.3 in | best month |
| June | 30.9 °C / 88 °F | 15.5 °C / 60 °F | 2 mm / 0.1 in | good month |
| July | 33.7 °C / 93 °F | 19.4 °C / 67 °F | 14 mm / 0.6 in | neither best nor good |
| August | 33.7 °C / 93 °F | 19.5 °C / 67 °F | 19 mm / 0.7 in | neither best nor good |
| September | 30.7 °C / 87 °F | 17.4 °C / 63 °F | 13 mm / 0.5 in | good month |
| October | 25.5 °C / 78 °F | 12.7 °C / 55 °F | 8 mm / 0.3 in | best month |
| November | 20.3 °C / 69 °F | 8.4 °C / 47 °F | 19 mm / 0.8 in | best month |
| December | 15.9 °C / 61 °F | 5.3 °C / 42 °F | 43 mm / 1.7 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: best
- AApril: best
- MMay: best
- JJune: good
- JJuly: neither
- AAugust: neither
- SSeptember: good
- OOctober: best
- NNovember: best
- DDecember: good
- Best
- March–May, October–November
- Good
- June, September, December–February
Why these months
January · good
In its favour: precipitation 43 mm / 1.7 in, share of daylight that is sunny 91%, average daily high 15.9 °C / 61 °F, wet days 4.3 days, days with heavy rain 1.5 days, relative humidity 48%, average daily low 5.2 °C / 41 °F.
Against: feels like (high) 12.4 °C / 54 °F.
February · good
In its favour: precipitation 40 mm / 1.6 in, share of daylight that is sunny 90%, feels like (high) 13.6 °C / 56 °F, average daily high 16.7 °C / 62 °F, wet days 5.1 days, days with heavy rain 1.4 days, relative humidity 52%, average daily low 5.5 °C / 42 °F.
March · best
In its favour: feels like (high) 16.1 °C / 61 °F, average daily high 18.4 °C / 65 °F, precipitation 33 mm / 1.3 in, share of daylight that is sunny 94%, wet days 4.6 days, days with heavy rain 0.9 days, relative humidity 56%, average daily low 6.5 °C / 44 °F.
April · best
In its favour: feels like (high) 20.3 °C / 69 °F, average daily high 22 °C / 72 °F, precipitation 14 mm / 0.5 in, share of daylight that is sunny 95%, wet days 2.3 days, days with heavy rain 0.5 days, relative humidity 52%, average daily low 8.5 °C / 47 °F.
May · best
In its favour: feels like (high) 24.3 °C / 76 °F, average daily high 25.2 °C / 77 °F, precipitation 7 mm / 0.3 in, share of daylight that is sunny 95%, wet days 1.6 days, days with heavy rain 0.1 days, average daily low 11.2 °C / 52 °F, relative humidity 52%.
June · good
In its favour: precipitation 2 mm / 0.1 in, share of daylight that is sunny 96%, wet days 0.6 days, days with heavy rain 0 days, average daily low 15.5 °C / 60 °F, relative humidity 43%.
Against: feels like (high) 30.8 °C / 87 °F, average daily high 30.9 °C / 88 °F.
September · good
In its favour: precipitation 13 mm / 0.5 in, share of daylight that is sunny 95%, feels like (high) 30.4 °C / 87 °F, wet days 2.5 days, days with heavy rain 0.3 days, average daily low 17.4 °C / 63 °F, relative humidity 44%.
Against: average daily high 30.7 °C / 87 °F.
October · best
In its favour: feels like (high) 23.4 °C / 74 °F, average daily high 25.5 °C / 78 °F, precipitation 8 mm / 0.3 in, share of daylight that is sunny 96%, wet days 1.2 days, days with heavy rain 0.1 days, average daily low 12.7 °C / 55 °F, relative humidity 42%.
November · best
In its favour: feels like (high) 16.9 °C / 62 °F, average daily high 20.3 °C / 69 °F, precipitation 19 mm / 0.8 in, share of daylight that is sunny 94%, wet days 2.7 days, days with heavy rain 0.7 days, relative humidity 43%, average daily low 8.4 °C / 47 °F.
December · good
In its favour: precipitation 43 mm / 1.7 in, share of daylight that is sunny 88%, average daily high 15.9 °C / 61 °F, wet days 4.9 days, days with heavy rain 1.1 days, relative humidity 51%, average daily low 5.3 °C / 42 °F.
Against: feels like (high) 12.4 °C / 54 °F.
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: neither
- JJuly: neither
- AAugust: neither
- SSeptember: neither
- OOctober: best
- NNovember: best
- DDecember: best
- Best
- October–May
Why these months
January · best
In its favour: average daily high 15.9 °C / 61 °F, precipitation 43 mm / 1.7 in, wet days 4.3 days, days with heavy rain 1.5 days, feels like (high) 12.4 °C / 54 °F, average daily low 5.2 °C / 41 °F, share of daylight that is sunny 91%, wind (daily max) 11 km/h / 7 mph, daylight per day 10.3 h.
February · best
In its favour: average daily high 16.7 °C / 62 °F, precipitation 40 mm / 1.6 in, wet days 5.1 days, days with heavy rain 1.4 days, feels like (high) 13.6 °C / 56 °F, average daily low 5.5 °C / 42 °F, share of daylight that is sunny 90%, daylight per day 11 h, wind (daily max) 13 km/h / 8 mph.
March · best
In its favour: average daily high 18.4 °C / 65 °F, precipitation 33 mm / 1.3 in, wet days 4.6 days, days with heavy rain 0.9 days, feels like (high) 16.1 °C / 61 °F, average daily low 6.5 °C / 44 °F, share of daylight that is sunny 94%, daylight per day 12 h, wind (daily max) 14 km/h / 9 mph.
April · best
In its favour: average daily high 22 °C / 72 °F, precipitation 14 mm / 0.5 in, wet days 2.3 days, days with heavy rain 0.5 days, feels like (high) 20.3 °C / 69 °F, average daily low 8.5 °C / 47 °F, share of daylight that is sunny 95%, daylight per day 13 h, wind (daily max) 14 km/h / 9 mph.
May · best
In its favour: precipitation 7 mm / 0.3 in, wet days 1.6 days, days with heavy rain 0.1 days, average daily high 25.2 °C / 77 °F, average daily low 11.2 °C / 52 °F, share of daylight that is sunny 95%, daylight per day 13.9 h, feels like (high) 24.3 °C / 76 °F, wind (daily max) 14 km/h / 8 mph.
October · best
In its favour: precipitation 8 mm / 0.3 in, wet days 1.2 days, days with heavy rain 0.1 days, average daily low 12.7 °C / 55 °F, share of daylight that is sunny 96%, daylight per day 11.3 h, feels like (high) 23.4 °C / 74 °F, wind (daily max) 11 km/h / 7 mph.
Against: average daily high 25.5 °C / 78 °F.
November · best
In its favour: average daily high 20.3 °C / 69 °F, precipitation 19 mm / 0.8 in, wet days 2.7 days, days with heavy rain 0.7 days, feels like (high) 16.9 °C / 62 °F, average daily low 8.4 °C / 47 °F, share of daylight that is sunny 94%, wind (daily max) 11 km/h / 7 mph, daylight per day 10.5 h.
December · best
In its favour: average daily high 15.9 °C / 61 °F, precipitation 43 mm / 1.7 in, wet days 4.9 days, days with heavy rain 1.1 days, feels like (high) 12.4 °C / 54 °F, average daily low 5.3 °C / 42 °F, share of daylight that is sunny 88%, wind (daily max) 11 km/h / 7 mph, daylight per day 10 h.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Bear Mountain, 129 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 | 13.6 °C | 16.1 °C | 20.3 °C | 24.3 °C | 30.8 °C | 34.9 °C | 34.6 °C | 30.4 °C | 23.4 °C | 16.9 °C | 12.4 °C |
| Days with heavy rain | 1.5 days | 1.4 days | 0.9 days | 0.5 days | 0.1 days | 0 days | 0.3 days | 0.3 days | 0.3 days | 0.1 days | 0.7 days | 1.1 days |
| Time rain usually falls | 4 pm | 3 pm | 2 pm | 5 pm | 4 pm | 4 pm | 3 pm | 3 pm | 3 pm | 3 pm | 6 pm | 4 pm |
| Sunshine per day | 9.3 h | 9.9 h | 11.3 h | 12.3 h | 13.2 h | 13.8 h | 13.6 h | 12.8 h | 11.8 h | 10.8 h | 9.8 h | 8.8 h |
| Relative humidity | 48% | 52% | 56% | 52% | 52% | 43% | 43% | 42% | 44% | 42% | 43% | 51% |
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 | 4.9 µg/m³ | 5.6 µg/m³ | 6.4 µg/m³ | 8.4 µg/m³ | 8.8 µg/m³ | 8.9 µg/m³ | 9.5 µg/m³ | 9 µg/m³ | 8.1 µg/m³ | 7.2 µg/m³ | 4.8 µg/m³ | 5.5 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 9.2 µg/m³ | 10.3 µg/m³ | 11.1 µg/m³ | 12.8 µg/m³ | 12.3 µg/m³ | 11.9 µg/m³ | 12.8 µg/m³ | 12.7 µg/m³ | 12.9 µg/m³ | 12 µg/m³ | 8.7 µg/m³ | 10.7 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.