Climate Insights for Arroyo Seco

The climate in Arroyo Seco is cool. The average annual temperature is 7°C and approximately 439mm of precipitation falls per year. July is the wettest month, receiving around 57mm of rainfall. Arroyo Seco is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, December, February, when temperatures can drop to -10°C. Snowfall occurs from January to December, with around 185cm accumulating over the season.

Arroyo Seco has a wide annual temperature range, spanning 36°C from the coldest to warmest months. The warmest month is July, when average highs reach 26°C and the mean temperature sits around 19°C. The coldest month is January, when overnight lows fall to -10°C and the daily average is -5°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Arroyo Seco is a relatively dry area, receiving approximately 439mm of precipitation annually, which averages out to around 37mm per month. The wettest month is July, averaging 57mm of rainfall. August and April also tend to see above-average precipitation. The driest month is June, with just 26mm. That's 31mm less than July, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 185cm accumulating over the season. January typically sees the most snow at around 37cm.

Arroyo Seco is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently spring in Arroyo Seco, which began on March 20, 2026. Arroyo Seco 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 26°C, while the coldest stretch bottoms out in January near -10°C. Summer is next, beginning on June 21, 2026 — 3 days from now.

The best time to visit Arroyo Seco is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 44mm per month. By contrast, January can be quite cold with temperatures dropping to -10°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Arroyo Seco 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.