Updated October 2026
Spring Mill State Park: Weather by Month and When to Go
Spring Mill State Park is a state park in Indiana. The USGS Protected Areas Database maps about 680 acres under its name. Average highs range from 40°F in January to 87°F in July.
Average highs sit between 60°F and 80°F in April through May and September through October. They run above 80°F in June through August and below 60°F in November through March. The figures are NOAA climate normals for 1991–2020, measured at a weather station 13 miles from the park.
Warmest average high
87°F
July
Coldest average low
21°F
January
Most precipitation
5.4 in
April and May
Longest days
14.7 h
June
Spring Mill State Park weather by month
| Month | Average high | Average low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 40°F | 21°F | 3.4 in | 3.7 in | 9.6 h |
| February | 45°F | 24°F | 3.4 in | 5.2 in | 10.5 h |
| March | 55°F | 32°F | 4.4 in | 1.2 in | 11.7 h |
| April | 67°F | 41°F | 5.4 in | 0.0 in | 13.0 h |
| May | 76°F | 52°F | 5.4 in | 0.0 in | 14.1 h |
| June | 84°F | 61°F | 4.9 in | 0.0 in | 14.7 h |
| July | 87°F | 65°F | 4.2 in | 0.0 in | 14.5 h |
| August | 86°F | 62°F | 3.2 in | 0.0 in | 13.5 h |
| September | 80°F | 54°F | 3.9 in | 0.0 in | 12.2 h |
| October | 68°F | 42°F | 3.4 in | 0.0 in | 11.0 h |
| November | 55°F | 33°F | 4.0 in | 0.1 in | 9.8 h |
| December | 44°F | 26°F | 4.0 in | 2.6 in | 9.3 h |
Temperature, precipitation and snowfall figures are NOAA climate normals for 1991–2020 from station USC00126705, the nearest station with a complete set of temperature normals, 13 miles from the park. Conditions in the park can differ from the station's, most of all where the two sit at different elevations. Daylight is calculated for the park's latitude at the middle of each month. The acreage is what the USGS Protected Areas Database maps under the park's name. The state's own figure can differ, because the database may hold part of a park under another name.
What the averages show
- Temperature. July is the warmest month, with an average high of 87°F and an average low of 65°F. January is the coldest month, with an average low of 21°F and an average high of 40°F.
- Precipitation. April and May are the wettest months, each averaging 5.4 inches of precipitation, and August is the driest, at 3.2 inches. An average year brings about 49.6 inches in total.
- Snowfall. The station averages 12.8 inches of snow a year, with the most in February (5.2 inches).
- Daylight. Days run from about 9.3 hours of daylight in December to 14.7 hours in June.
Camping, trails, maps and fees
Whether Spring Mill State Park has camping or cabins, where its trails run, when it opens and what it charges are all published by the agency that runs the park. Its official page is the place to check before a trip.
Official Spring Mill State Park page
For the forecast rather than the averages, the National Weather Service issues a point forecast for the park's location.
National Weather Service forecast for Spring Mill State Park
Where to stay near Spring Mill State Park
Hotels, cabins and vacation rentals near Spring Mill State Park, with live availability and prices.
Top-rated places to stay near Spring Mill State Park
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Spring Mill State Park?
Get lodging deals near Spring Mill State Park by email. No spam, unsubscribe anytime.
Frequently Asked Questions
July is the warmest month, with an average high of 87°F and an average low of 65°F. January is the coldest month, with an average low of 21°F and an average high of 40°F. These are NOAA 1991–2020 climate normals from a weather station 13 miles from the park.
Average highs sit between 60°F and 80°F in April through May and September through October. They run above 80°F in June through August and below 60°F in November through March.
April and May are the wettest months, each averaging 5.4 inches of precipitation, and August is the driest, at 3.2 inches. An average year brings about 49.6 inches in total. Snowfall averages 12.8 inches a year, with the most in February.
Days run from about 9.3 hours of daylight in December to 14.7 hours in June. The hours are calculated for the park's latitude.
Nearest National Park Service sites
- Lincoln Boyhood National Memorial53 miles away
- George Rogers Clark National Historical Park61 miles away
- Abraham Lincoln Birthplace National Historical Park89 miles away
Nearby state parks
- Brown County State Park30 miles away
- Clifty Falls State Park54 miles away
- Turkey Run State Park90 miles away
- Big Bone Lick State Historic Site90 miles away · Kentucky
Distances are measured in a straight line from the park, so the drive is longer.
Sources: NOAA NCEI U.S. Climate Normals 1991–2020; USGS Protected Areas Database for location and acreage; the official Indiana state park listing for the park's name.