OOLITIC, IN

Overview:
Named after Oolite, a type of limestone found in Indiana, Oolitic is located south and slightly west of Indianapolis. This area is an active mining town, with some of the largest limestone quarries in the world operating directly north of the town. The Salt Creek river directly borders the eastern side of this area, with other small water bodies scattered throughout the terrain.

Generally, this area has hot and humid summers, with days over 90°F occurring about two weeks of the year. The area also experiences cooler winters, and days below freezing (32°F) should be expected regularly throughout the season. Most precipitation typically falls during the summer months and peaks in May, and the least falls during the winter. Days with extreme precipitation events occur sporadically with a total of around one week per year.

State/ Province ID: IN

Station ID: C00126580

Directory Name: OOLITIC_PURDUE_EX_FM_HCN_IN_C00126580

Elevation: 198.10m

The resources presented here were developed in cooperation with the Office of the Michigan State Climatologist using data from the National Centers for Environmental Information. For more information regarding our data sources, quality control, and methodology, please see our Historical Climatologies: Quality Control reference guide.

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Recent Climate Summary, 1991-2020


Average Temperature	53.3°F11.8°C
Average Low Temperature	42.4°F5.8°C
Average High Temperature	64.1°17.8°C
Days/Year that exceed 90°F	12.3
Days/Year that fall below 32°F	111.9
Lowest Annual Average Temperature	50.6°F10.3°C
Highest Annual Average Temperature	56.0°F13.3°C
Average Annual Total Precipitation	47.7 in121.2 cm
Lowest Annual Precipitation Total	34.4 in87.5 cm
Highest Annual Precipitation Total	64.5 in163.7 cm
Days/Year that exceed 1.25" of Precipitation	8.0

Temperature

Click on the following links to be taken to the corresponding portion of the page.

Monthly Average Temperature
How Temperatures are Changing
- Changes in Average Temperature – Includes a summary table of the average annual and seasonal temperature changes, and time series graphs of how the annual low, average, and high temperatures compare to the long term average plotted for every year on record.
- Cold Temperatures – View time series plots of the number of days per year below 32°F and the number of heating degree days per year to see how cold days are changing.
- Hot Temperatures – View time series plots of the number of days per year above 90°F and the number of cooling degree days per year to see how hot days are changing.
- Growing Season Changes – View a time series of the annual number of days in the freeze-free period.

Monthly Average Temperature

Changes in Average Temperature, 1951-2025.


	°F°C
Annual average temperature	-0.3-0.2
Winter average temperature	0.60.3
Spring average temperature	-0.3-0.1
Summer average temperature	-1.0-0.6
Fall average temperature	0.10.1

Annual High and Low Temperature Departure

Cold Temperatures

¹Heating Degree Days (HDDs) are indexed units, not actual days, that roughly describe the demand to heat a building. HDDs accumulate on days colder than 65°F when heating is required. Every degree below 65°F is added to the annual total for an annual HDD value, which is plotted in the figure.

Hot Temperatures

²Cooling Degree Days (CDDs) are indexed units, not actual days, that roughly describe the demand to cool a building. CDDs accumulate on days warmer than 65°F when cooling is required. Every degree above 65°F is added to the annual total for an annual CDD value, which is plotted in the figure.

Growing Season Changes

Precipitation