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Monthly climate in Garnavillo, Iowa, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Garnavillo features a humid continental climate (Dfa).Temperatures typically range between -6 °C (21 °F) and 24 °C (75 °F) through the year, but rarely can drop to -33 °C (-27 °F) or can rise to as high as 34 °C (94 °F).The average annual precipitation amounts to about 1050 mm (41.4 inches) and receives 118 rainy days on the 1 mm (0.04 inches) threshold annually.Garnavillo enjoys an average of 2935 hours of sunshine throughout the year, and daylight varies from 9 hours 3 minutes to 15 hours 16 minutes per day.

Monthly average temperatures in Garnavillo, Iowa, United States §

The warmest months in Garnavillo are June, July and August, with daily mean temperatures ranging from 22 to 24 °C (71 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -2 °C (21 - 29 °F) throughout the day. On average each year, Garnavillo experiences 77 days above 25 °C (77.0 °F) and 128 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Garnavillo, Iowa, 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 10°C
(51°F)		 20°C
(68°F)		 22°C
(72°F)		 27°C
(81°F)		 33°C
(92°F)		 33°C
(92°F)		 34°C
(94°F)		 33°C
(93°F)		 33°C
(91°F)		 30°C
(87°F)		 22°C
(73°F)		 21°C
(69°F)
Mean maximum 8°C
(46°F)		 12°C
(54°F)		 18°C
(65°F)		 24°C
(76°F)		 31°C
(88°F)		 32°C
(90°F)		 33°C
(91°F)		 31°C
(88°F)		 30°C
(87°F)		 29°C
(84°F)		 17°C
(63°F)		 14°C
(58°F)
Average high -3°C
(27°F)		 -1°C
(30°F)		 7°C
(45°F)		 13°C
(56°F)		 20°C
(69°F)		 27°C
(80°F)		 28°C
(83°F)		 27°C
(80°F)		 24°C
(75°F)		 15°C
(59°F)		 7°C
(44°F)		 2°C
(36°F)
Daily mean -6°C
(21°F)		 -6°C
(22°F)		 2°C
(37°F)		 8°C
(47°F)		 16°C
(60°F)		 22°C
(72°F)		 24°C
(75°F)		 22°C
(71°F)		 19°C
(66°F)		 10°C
(51°F)		 2°C
(36°F)		 -2°C
(29°F)
Average low -10°C
(14°F)		 -10°C
(14°F)		 -2°C
(29°F)		 3°C
(38°F)		 11°C
(52°F)		 17°C
(62°F)		 19°C
(66°F)		 16°C
(62°F)		 13°C
(56°F)		 6°C
(43°F)		 -2°C
(29°F)		 -5°C
(23°F)
Mean minimum -24°C
(-12°F)		 -24°C
(-11°F)		 -15°C
(5°F)		 -5°C
(23°F)		 2°C
(35°F)		 11°C
(52°F)		 14°C
(57°F)		 11°C
(53°F)		 6°C
(43°F)		 -4°C
(26°F)		 -11°C
(13°F)		 -15°C
(4°F)
Minimum -33°C
(-27°F)		 -33°C
(-27°F)		 -24°C
(-11°F)		 -9°C
(16°F)		 -2°C
(29°F)		 9°C
(48°F)		 12°C
(53°F)		 11°C
(52°F)		 3°C
(38°F)		 -6°C
(22°F)		 -16°C
(3°F)		 -22°C
(-7°F)

Compare climate in Garnavillo with other places

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

Monthly average precipitation in Garnavillo, Iowa, United States §

Garnavillo usually has the most precipitation in May, June and October, with an average of 12 rainy days and 138 mm (5.4 inches) of precipitation per month.The driest months in Garnavillo are January, November and December. On average, 44 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Garnavillo, Iowa, 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) 44 (1.7) 56 (2.2) 62 (2.5) 78 (3.1) 150 (5.9) 130 (5.1) 103 (4.0) 87 (3.4) 120 (4.7) 133 (5.2) 47 (1.9) 40 (1.6)
Average precipitation days (≥ 1 mm) 8 8 9 11 14 12 11 9 10 12 8 6

Monthly sunshine hours in Garnavillo, Iowa, United States §

The sunniest months in Garnavillo are June, July and August, when the sun shines an average of 11 hours 7 minutes a day.Least sunny months in Garnavillo: January, February and December receive an average of 5 hours 37 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Garnavillo, Iowa, 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 131 195 232 238 258 333 360 329 266 206 196 185
Mean daily daylight hours 9h 25m 10h 32m 11h 58m 13h 25m 14h 39m 15h 16m 14h 56m 13h 50m 12h 26m 10h 59m 9h 42m 9h 3m

Solar UV radiation in Garnavillo, Iowa, United States §

Garnavillo experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Garnavillo UV Index data.

Average daily maximum UV levels by month for Garnavillo, Iowa, 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 4 5 8 9 10 10 9 8 5 3 2