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Monthly climate in Greencastle, Indiana, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Greencastle features a humid continental climate (Dfa). Temperatures typically range between -1 °C (30 °F) and 25 °C (77 °F) through the year, but rarely can drop to -28 °C (-18 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 1206 mm (47.5 inches) and receives 132 rainy days on the 1 mm (0.04 inches) threshold annually. Greencastle enjoys an average of 2912 hours of sunshine throughout the year, and daylight varies from 9 hours 23 minutes to 14 hours 55 minutes per day.

Monthly average temperatures in Greencastle, Indiana, United States §

The warmest months in Greencastle are June, July and August, with daily mean temperatures ranging from 23 to 25 °C (74 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 2 °C (30 - 36 °F) throughout the day. On average each year, Greencastle experiences 103 days above 25 °C (77.0 °F) and 91 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Greencastle, Indiana, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 18°C
(64°F)		 23°C
(73°F)		 23°C
(74°F)		 28°C
(83°F)		 33°C
(92°F)		 35°C
(96°F)		 33°C
(92°F)		 34°C
(93°F)		 33°C
(92°F)		 33°C
(91°F)		 26°C
(79°F)		 18°C
(64°F)
Mean maximum 14°C
(58°F)		 17°C
(63°F)		 20°C
(69°F)		 26°C
(80°F)		 30°C
(87°F)		 33°C
(92°F)		 33°C
(91°F)		 32°C
(90°F)		 32°C
(90°F)		 30°C
(85°F)		 20°C
(68°F)		 16°C
(62°F)
Average high 2°C
(37°F)		 5°C
(41°F)		 11°C
(52°F)		 16°C
(62°F)		 23°C
(73°F)		 28°C
(82°F)		 29°C
(85°F)		 28°C
(83°F)		 26°C
(80°F)		 19°C
(67°F)		 10°C
(50°F)		 6°C
(44°F)
Daily mean -1°C
(30°F)		 1°C
(33°F)		 6°C
(43°F)		 11°C
(52°F)		 18°C
(65°F)		 23°C
(74°F)		 25°C
(77°F)		 23°C
(74°F)		 21°C
(70°F)		 14°C
(58°F)		 5°C
(42°F)		 2°C
(36°F)
Average low -5°C
(23°F)		 -4°C
(26°F)		 1°C
(35°F)		 6°C
(43°F)		 13°C
(56°F)		 18°C
(65°F)		 20°C
(69°F)		 19°C
(66°F)		 16°C
(61°F)		 9°C
(49°F)		 1°C
(34°F)		 -2°C
(29°F)
Mean minimum -19°C
(-2°F)		 -17°C
(2°F)		 -9°C
(16°F)		 -3°C
(27°F)		 3°C
(38°F)		 13°C
(55°F)		 14°C
(58°F)		 13°C
(55°F)		 8°C
(47°F)		 -0°C
(32°F)		 -7°C
(19°F)		 -14°C
(8°F)
Minimum -28°C
(-18°F)		 -21°C
(-5°F)		 -17°C
(2°F)		 -6°C
(21°F)		 -1°C
(31°F)		 9°C
(49°F)		 13°C
(56°F)		 12°C
(53°F)		 6°C
(43°F)		 -3°C
(27°F)		 -13°C
(9°F)		 -20°C
(-3°F)

Compare climate in Greencastle with other places

Compare temperature, precipitation, sunshine, UV index in Greencastle, Indiana, United States with other places around the world.

Monthly average precipitation in Greencastle, Indiana, United States §

Greencastle usually has the most precipitation in March, May and October, with an average of 13 rainy days and 126 mm (5.0 inches) of precipitation per month. The driest months in Greencastle are January, September and December. On average, 78 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Greencastle, Indiana, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 84 (3.3) 91 (3.6) 126 (5.0) 101 (4.0) 141 (5.6) 108 (4.3) 101 (4.0) 104 (4.1) 69 (2.7) 111 (4.4) 89 (3.5) 82 (3.2)
Average precipitation days (≥ 1 mm) 9 12 13 11 15 12 12 12 6 12 8 10

Monthly sunshine hours in Greencastle, Indiana, United States §

The sunniest months in Greencastle are June, July and August, when the sun shines an average of 10 hours 55 minutes a day. Least sunny months in Greencastle: January, February and December receive an average of 4 hours 58 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Greencastle, Indiana, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 116 157 215 242 279 329 346 328 288 237 190 178
Mean daily daylight hours 9h 42m 10h 42m 11h 58m 13h 16m 14h 22m 14h 55m 14h 37m 13h 38m 12h 23m 11h 6m 9h 58m 9h 23m

Solar UV radiation in Greencastle, Indiana, United States §

Greencastle experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure. January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Greencastle UV Index data.

Average daily maximum UV levels by month for Greencastle, Indiana, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 6 9 10 11 10 9 8 6 4 3

Detailed Monthly Weather Insights for Greencastle, Indiana, United States

Discover in-depth weather details for every month in Greencastle. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Greencastle's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.