Climate Insights for Alto

The climate in Alto is cool. The average annual temperature is 9°C and approximately 890mm of precipitation falls per year. March is the wettest month, receiving around 139mm of rainfall. Alto is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to -10°C. Snowfall occurs from January to December, with around 143cm accumulating over the season.

Alto has a wide annual temperature range, spanning 38°C from the coldest to warmest months. The warmest month is July, when average highs reach 28°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -10°C and the daily average is -7°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 12°C shift in average temperatures.

Alto is a moderately rainy area, receiving approximately 890mm of precipitation annually, which averages out to around 74mm per month. The wettest month is March, averaging 139mm of rainfall. September and June also tend to see above-average precipitation. The driest month is February, with just 25mm. That's 114mm less than March, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 143cm accumulating over the season. March typically sees the most snow at around 45cm.

Alto is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

It is currently summer in Alto, which began on June 21, 2026. Alto is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 28°C, while the coldest stretch bottoms out in January near -10°C. Autumn is next, beginning on September 23, 2026 — 52 days from now.

The best time to visit Alto is during May, June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 87mm per month. By contrast, January can be quite cold with temperatures dropping to -10°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Alto based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.