When to go · South Valley
South Valley in December
Avoid month. Listed as a month to avoid: Jul–Sep (valley heat, often 35–40 °C), Dec–Jan rain days.Avoid month. Listed as a month to avoid: Jul–Sep (valley heat, often 95–104 °F), Dec–Jan rain days.
Key facts
- Verdict
- Avoid
- Temperature
- 20°C68°F / 7°C45°F
- average high / low
- Rain days
- 5
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
Listed as a month to avoid: Jul–Sep (valley heat, often 35–40 °C), Dec–Jan rain days.Listed as a month to avoid: Jul–Sep (valley heat, often 95–104 °F), Dec–Jan rain days.
Weather in December
- South ValleyHighs around 20 °C, lows around 7 °C, rain on about 5 daysHighs around 68 °F, lows around 45 °F, rain on about 5 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Christmas Day big impact
25 Dec · United States
Most businesses closed; flights full from about 20 Dec to 2 Jan.
Crowds and prices
- Crowds · United States overall
- High
- Prices · United States overall
- High
United States overall: Holiday lights in New York, ski season opens; flights and hotels peak around Christmas and New Year.
High-price month: see what to book ahead.
What to pack
- A warm layer for the evenings