Temperature
Hot by day, brisk at night.
Arco is most comfortable in early autumn. Summers are warm and winters are cold. Rain stays limited most of the year. Humidity is usually low.

Hot by day, brisk at night.
One of the driest months, with very little rain.
Plenty of sun this month.
Some hot afternoons, with mostly dry air.
In August, afternoons feel about 75° and nights feel near 54°.
Predominantly clear skies.
August late afternoons are around 83°F, easing to about 80°F in early evening.
Calm winds are typical in August.
Want a side-by-side climate view? Compare Arco with Toronto.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 11, 2026
Data & methodology