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Monthly climate in Westport, Indiana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Westport features a humid subtropical climate (Cfa).Temperatures typically range between 0 °C (32 °F) and 25 °C (77 °F) through the year, but rarely can drop to -22 °C (-7 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 1317 mm (51.8 inches) and receives 132 rainy days on the 1 mm (0.04 inches) threshold annually.Westport enjoys an average of 2915 hours of sunshine throughout the year, and daylight varies from 9 hours 25 minutes to 14 hours 52 minutes per day.

Monthly average temperatures in Westport, Indiana, United States §

The warmest months in Westport are June, July and August, with daily mean temperatures ranging from 23 to 25 °C (73 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 0 to 3 °C (32 - 38 °F) throughout the day. On average each year, Westport experiences 103 days above 25 °C (77.0 °F) and 81 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Westport, 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 19°C
(66°F)		 25°C
(77°F)		 25°C
(78°F)		 29°C
(84°F)		 33°C
(91°F)		 33°C
(91°F)		 34°C
(93°F)		 33°C
(91°F)		 33°C
(92°F)		 34°C
(93°F)		 26°C
(79°F)		 19°C
(66°F)
Mean maximum 16°C
(61°F)		 19°C
(67°F)		 22°C
(71°F)		 27°C
(81°F)		 30°C
(87°F)		 32°C
(90°F)		 32°C
(91°F)		 32°C
(90°F)		 32°C
(90°F)		 30°C
(86°F)		 20°C
(69°F)		 17°C
(63°F)
Average high 4°C
(39°F)		 6°C
(44°F)		 12°C
(53°F)		 17°C
(63°F)		 23°C
(74°F)		 27°C
(82°F)		 29°C
(85°F)		 28°C
(83°F)		 26°C
(79°F)		 20°C
(68°F)		 11°C
(51°F)		 7°C
(46°F)
Daily mean -0°C
(32°F)		 2°C
(36°F)		 7°C
(44°F)		 12°C
(53°F)		 18°C
(65°F)		 23°C
(73°F)		 25°C
(77°F)		 23°C
(74°F)		 21°C
(70°F)		 15°C
(59°F)		 6°C
(43°F)		 3°C
(38°F)
Average low -4°C
(26°F)		 -2°C
(28°F)		 2°C
(36°F)		 7°C
(44°F)		 14°C
(57°F)		 18°C
(65°F)		 20°C
(69°F)		 19°C
(67°F)		 16°C
(61°F)		 10°C
(50°F)		 1°C
(35°F)		 -1°C
(31°F)
Mean minimum -17°C
(2°F)		 -14°C
(7°F)		 -9°C
(16°F)		 -3°C
(26°F)		 3°C
(38°F)		 13°C
(55°F)		 15°C
(60°F)		 13°C
(55°F)		 8°C
(47°F)		 0°C
(33°F)		 -8°C
(19°F)		 -11°C
(13°F)
Minimum -22°C
(-7°F)		 -19°C
(-2°F)		 -14°C
(6°F)		 -5°C
(23°F)		 -2°C
(29°F)		 9°C
(49°F)		 14°C
(58°F)		 12°C
(53°F)		 6°C
(43°F)		 -1°C
(31°F)		 -16°C
(4°F)		 -18°C
(-0°F)

Compare climate in Westport with other places

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

Monthly average precipitation in Westport, Indiana, United States §

Westport usually has the most precipitation in March, May and June, with an average of 13 rainy days and 133 mm (5.2 inches) of precipitation per month.The driest months in Westport are January, August and September. On average, 87 mm (3.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Westport, 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) 86 (3.4) 116 (4.6) 140 (5.5) 122 (4.8) 131 (5.2) 128 (5.0) 109 (4.3) 93 (3.7) 83 (3.3) 99 (3.9) 104 (4.1) 106 (4.2)
Average precipitation days (≥ 1 mm) 10 13 13 11 14 12 11 11 7 11 9 10

Monthly sunshine hours in Westport, Indiana, United States §

The sunniest months in Westport are June, July and August, when the sun shines an average of 10 hours 51 minutes a day.Least sunny months in Westport: 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 Westport, 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 122 156 219 238 280 328 347 323 283 244 196 172
Mean daily daylight hours 9h 44m 10h 43m 11h 58m 13h 15m 14h 20m 14h 52m 14h 35m 13h 37m 12h 23m 11h 6m 9h 59m 9h 25m

Solar UV radiation in Westport, Indiana, United States §

Westport 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 Westport UV Index data.

Average daily maximum UV levels by month for Westport, 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 7 9 10 11 10 9 8 6 4 3