Climate Chart of Alta, USA

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

For Alta, USA, the climate data cover 2013–2023. Monthly mean temperatures range from January at 12.7 °C to August at 24.0 °C, offering a broad view of the year's typical monthly conditions rather than daytime extremes. Rainfall and sunshine also vary across the calendar: mean daily rainfall is highest in December at 2.63 mm/day, while mean daily sunshine reaches its highest level in July at 12.57 hours/day. These averages help frame planning, but do not describe conditions on any particular day.

Climate overview

Temperature

The monthly mean temperature is lowest in January at 12.7 °C and highest in August at 24.0 °C. These are averages for each month, not daytime maximum temperatures, so they describe the typical monthly temperature without specifying how warm or cool an individual day may feel. The unweighted mean of the monthly means is 18.2 °C; it summarizes the calendar-month averages rather than weighting them by the number of days in each month.

Rain

Mean daily rainfall is lowest in July at 0.14 mm/day, while the highest monthly mean occurs in December at 2.63 mm/day. The figures are daily averages, not monthly rainfall totals, and a lower mean does not guarantee dry days or indicate how frequently rain falls. Across the calendar months, the unweighted mean of the monthly daily-rainfall means is 0.96 mm/day.

Sunshine

Mean daily sunshine reaches its highest level in July at 12.57 hours/day and its lowest in December at 7.61 hours/day. The unweighted mean of the monthly sunshine means is 10.24 hours/day per day. These are averages of sunshine duration, not measures of day length, and actual sunshine can differ from the monthly mean.

Snow

The highest monthly mean daily snowfall is recorded in February at 0.02 mm/day. This small recorded average does not establish how many days have snowfall, whether snow accumulates or remains on the ground, or what conditions are suitable for skiing.

Best Travel Time Guide for Alta, USA: Ideal Seasons and Weather Insights

For visitors prioritising lower average rainfall, July is a conditional option: its mean daily rainfall is 0.14 mm/day. This average cannot promise dry days or show how rain is distributed, so plan for changing conditions rather than treating it as a guarantee. Rain preparation is especially relevant in December, when the mean daily rainfall is 2.63 mm/day. Visitors who prefer cooler monthly averages can consider January, when the monthly mean temperature is 12.7 °C; it is not a daytime maximum, and individual days may differ. For outdoor sightseeing that prioritises longer average sunshine duration, July records 12.57 hours/day, while December records 7.61 hours/day. Sunshine duration is not day length, and these separate criteria do not establish one universally best time to visit. The recorded mean daily snowfall reaches 0.02 mm/day in February, but that average cannot indicate snow cover or skiing conditions.

Climate Data Overview for Alta, USA

Explore the comprehensive climate data for Alta, USA. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

Month	Average: Temperature °C	Rain (mm) / day	Snow (mm) / day	Sunshine (h) / day
Jan	12.7	2.49	0.00	7.90
Feb	13.5	1.56	0.02	9.05
Mar	14.9	2.04	0.00	9.85
Apr	17.2	0.48	0.00	11.12
May	18.2	0.33	0.00	11.31
Jun	21.1	0.16	0.00	12.16
Jul	23.5	0.14	0.00	12.57
Aug	24.0	0.29	0.00	11.81
Sep	23.3	0.35	0.00	10.81
Oct	20.5	0.33	0.00	9.79
Nov	16.4	0.69	0.00	8.86
Dec	12.8	2.63	0.00	7.61
Average	18.2	0.96	0.00	10.24