The climate at Indiana Dunes National Park varies semi-monthly basis. Let’s take a closer look at what happens in the park…

January is pretty much the coldest month at the Dunes, with temperatures reaching subzero. Average high of 31.6 F (-0.2 C). Average low of 17.6 F (-0.8 C)

February is the last month of winter at Indiana Dunes National Park and it’s a cold wintry month. Average high of 35.4 F (1.9 C). Average low of 21.4 F (-5.9 C).

March, the first month of the spring season, at the Dunes, with temperatures varying from 29.7 F (-1.3 C) and 45.3 F (7.4 C)

April is a moderate spring month at the Dunes with temperatures varying from 39.9 F (4.4 C) to 57.4 F (14.1 C).

May is the last month of spring with pleasant temperatures all month long, temperatures varying from 48.9 F (9.4 C) to 68.2 F (20.1 C).

June is the first month of the summer at Indiana Dunes National Park. Temperatures varying from 68.2 F (20.1 C) to 77.2 F (25.1 C).

July is another summer month at the Dunes. considered the hottest month at the Dunes throughout the year. Average temperatures for the month range from 64.4 F (18 C) to 81.5 F (27.5 C).

August is the last month of the summer, at the Dunes, and it’s a hot one with temperatures ranging from 63.1 F (17.3 C) to 79.9 F (26.6 C).

September is the first month of autumn and it’s usually a hot month at the Dunes with temperatures ranging 55. 6 F (13.1 C) to 79.9 F (23.2 C).

October is another enjoyable autumn month at Indiana Dunes National Park with temperatures varying from 44.1 F (6.7 C) to 61.5 F (16.4 C).

November is the last month of autumn at the Dunes and it’s the start of the frosty months with temperatures varying from 34.5 F (1.4 C) to 48.7 F (9.3 C).

December is the first month of winter at the dunes and its a cold one with temperatures varying from 22.3 F ( -5.4 C) to 35.6 F (2 C).

Overall, the climate at Indiana Dunes National Park is enjoyable!