Weather and Temperature
The following graph helps you to understand the weather in Odawara and Hakone. (No temperature information is provided for Hakone.)
The elevation of Odawara is approximately 20m. On the other hand, Hakone (Lake Ashi-no-ko) is 723m. So Hakone is always 3~4 degrees cooler than Odawara.
(Original Data: Japan Meteorological Agency)