Alta weather by month
The best time to visit Alta is January, March and December — 94/100 in March, -1°C and 17 rainy days. The best season is winter, December to February (89/100 on average).
The worst month is August at 12/100 — nice, rainy, clean air. See August →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit United States →
Best season: December to February (89/100 on average) · worst August (12/100)
- Days
- -1°C
- Nights
- -8°C
- Wet days
- 17
- Sun
- 8.4 h
- Humidity
- 70%
- Daylight
- 12 h
Alta, month by month
Comfort score out of 100 for the kind of trip Alta is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
Crowds in Alta in March
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySpring break in United States(estimated)
Peak crowdsBusyShoulder seasonQuiet