In July, expect temperatures between 20C and 30C with an occasional shower in Amsterdam. In Summer, Amsterdam can be a bit damp.
Amsterdam has an oceanic climate (Köppen climate classification Cfb) strongly influenced by its proximity to the North Sea to the west, with prevailing westerly winds. Both winters and summers are considered mild, although occasionally quite cool. Amsterdam, as well as most of the North Holland province, lies in USDA Hardiness zone 8b. Frosts mainly occur during spells of easterly or northeasterly winds from the inner European continent. Even then, because Amsterdam is surrounded on three sides by large bodies of water, as well as having a significant heat-island effect, nights rarely fall below −5 °C (23 °F), while it could easily be −12 °C (10 °F) in Hilversum, 25 kilometres (16 miles) southeast. Summers are moderately warm but rarely hot. The average daily high in August is 22.1 °C (71.8 °F), and 30 °C (86 °F) or higher is only measured on average on 2.5 days, placing Amsterdam in AHS Heat Zone 2. The record extremes range from −24 °C (−11 °F) to 36.8 °C (98.2 °F). Days with more than 1 millimetre (0.04 in) of precipitation are common, on average 133 days per year. Amsterdam’s average annual precipitation is 838 millimetres (33 in), more than what is measured at Amsterdam Schiphol Airport. A large part of this precipitation falls as light rain or brief showers. Cloudy and damp days are common during the cooler months of October through March.