Do you need to know, when is the best time to go to Iowa? Then you should take a look here, what weather you can expect there during the year.
Iowa is part of USA - United States of America. The climate of USA is very varied, as United States of America is a large country. The climate is mostly temperate, but tropical in Hawaii and Florida, and arctic in Alaska. This is not all. The climate is semiarid in the great plains west of the Mississippi River, and arid in the Great Basin of the southwest. You can expect low winter temperatures in the northwest, but they are sometimes moderated in January and February by warm winds. Winters in the south are warmer. Don? forget, that temperatures are usually significantly lower in mountains.
When speaking about the usual weather in this area, the information is relevant for example for these popular places: Albia, Algona, Amana Colonies, Ames, Anamosa, Ankeny, Atlantic, Audubon, Bettendorf, Boone, Britt, Burlington, Carlisle, Cedar Falls, Cedar Rapids, Centerville, Central Iowa, Clarinda, Clear Lake, Clinton, Council Bluffs, Davenport, DeWitt, Decorah, Denison, Des Moines, Dubuque, Eastern Iowa, Effigy Mounds National Monument, Fairfield, Fort Dodge, Fort Madison, Grant Wood Country, Grinnell, I 380 Corridor, Independence, Iowa City, Kalona, Le Claire, Le Mars, Marquette, Marshalltown, Mason City, Missouri Valley, Mount Vernon, Muscatine, Newton, North Central Iowa, Northeast Iowa, Okoboji, Orange City Alton, Osceola, Ottumwa, Pella, Sheldon, Sioux City, South Central Iowa, Southeast Iowa, Southwest Iowa, Spencer, Spillville, Storm Lake, Villisca, Waterloo, West Des Moines, Western Iowa, Winterset.
Let's look now what weather you can expect in the area around Davenport and in many other cities. The warmest month here is July, the average maximum temperature is 28.3 ℃ (82.94 ℉). The average minimum temperature in this month is 17.1 ℃ (62.78 ℉). The coldest month here is January, the average maximum temperature is -1 ℃ (30.2 ℉). The average minimum temperature in this month is -10.6 ℃ (12.92 ℉). 
When travelling around Iowa, always consider the altitude of the the place as well. We should remind you, that the highest point in USA - United States of America is Denali (Mount McKinley) (6190 m) and the lowest point is Death Valley (-86 m). So there are huge differences in altitudes in this country and the weather is very different in them therefore. Keep in mind, that the temperature usually decreases by 1.2 - 1.9 ℃ (2.2 - 3.5 ℉) per 200 m (656 ft), depending on the other conditions. (And we should add, that in the very special condition named thermal inversion even the temperature may be higher in higher altitudes.)
Typical (usual) weather in Iowa in January is this: The average highest temperature in Iowa in January is -1 ℃ (30.2 ℉). The average lowest temperature is -10.6 ℃ (12.92 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around -0.05 ℃ (31.91 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 0.25 ℃ (32.45 ℉). The average rainfall is 29.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 9:13 (hours and minutes), in the middle of the month 9:30 and at the end of the month 9:59.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Iowa in February is this: The average highest temperature in Iowa in February is 1.5 ℃ (34.7 ℉). The average lowest temperature is -7.9 ℃ (17.78 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 0.25 ℃ (32.45 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 5.45 ℃ (41.81 ℉). The average rainfall is 34 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 9:59 (hours and minutes), in the middle of the month 10:35 and at the end of the month 11:15.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Iowa in March is this: The average highest temperature in Iowa in March is 9.4 ℃ (48.92 ℉). The average lowest temperature is -2 ℃ (28.4 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 5.45 ℃ (41.81 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 13.15 ℃ (55.67 ℉). The average rainfall is 63.2 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:15 (hours and minutes), in the middle of the month 11:57 and at the end of the month 12:39.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Iowa in April is this: The average highest temperature in Iowa in April is 16.9 ℃ (62.42 ℉). The average lowest temperature is 4.2 ℃ (39.56 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 13.15 ℃ (55.67 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 19.4 ℃ (66.92 ℉). The average rainfall is 88.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:39 (hours and minutes), in the middle of the month 13:19 and at the end of the month 13:58.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Iowa in May is this: The average highest temperature in Iowa in May is 21.9 ℃ (71.42 ℉). The average lowest temperature is 10.2 ℃ (50.36 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 19.4 ℃ (66.92 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 24.75 ℃ (76.55 ℉). The average rainfall is 106 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:58 (hours and minutes), in the middle of the month 14:31 and at the end of the month 14:56.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Iowa in June is this: The average highest temperature in Iowa in June is 27.6 ℃ (81.68 ℉). The average lowest temperature is 15.8 ℃ (60.44 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 24.75 ℃ (76.55 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 27.95 ℃ (82.31 ℉). The average rainfall is 109 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:56 (hours and minutes), in the middle of the month 15:09 and at the end of the month 15:09.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Iowa in July is this: The average highest temperature in Iowa in July is 28.3 ℃ (82.94 ℉). The average lowest temperature is 17.1 ℃ (62.78 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 27.95 ℃ (82.31 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 28.05 ℃ (82.49 ℉). The average rainfall is 108.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 15:09 (hours and minutes), in the middle of the month 14:55 and at the end of the month 14:29.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Iowa in August is this: The average highest temperature in Iowa in August is 27.8 ℃ (82.04 ℉). The average lowest temperature is 15.8 ℃ (60.44 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 28.05 ℃ (82.49 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 26.1 ℃ (78.98 ℉). The average rainfall is 115.2 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:29 (hours and minutes), in the middle of the month 13:56 and at the end of the month 13:18.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Iowa in September is this: The average highest temperature in Iowa in September is 24.4 ℃ (75.92 ℉). The average lowest temperature is 11 ℃ (51.8 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 26.1 ℃ (78.98 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 20.9 ℃ (69.62 ℉). The average rainfall is 76.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:18 (hours and minutes), in the middle of the month 12:38 and at the end of the month 11:56.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Iowa in October is this: The average highest temperature in Iowa in October is 17.4 ℃ (63.32 ℉). The average lowest temperature is 5 ℃ (41 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 20.9 ℃ (69.62 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 13.15 ℃ (55.67 ℉). The average rainfall is 75.6 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:56 (hours and minutes), in the middle of the month 11:15 and at the end of the month 10:36.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Iowa in November is this: The average highest temperature in Iowa in November is 8.9 ℃ (48.02 ℉). The average lowest temperature is -1.1 ℃ (30.02 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 13.15 ℃ (55.67 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 4.9 ℃ (40.82 ℉). The average rainfall is 60.8 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:36 (hours and minutes), in the middle of the month 10:00 and at the end of the month 9:31.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Iowa in December is this: The average highest temperature in Iowa in December is 0.9 ℃ (33.62 ℉). The average lowest temperature is -7.9 ℃ (17.78 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 4.9 ℃ (40.82 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around -0.05 ℃ (31.91 ℉). The average rainfall is 43.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 9:31 (hours and minutes), in the middle of the month 9:13 and at the end of the month 9:10.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.| Des Moines | temperature: - | highest temperature: 1.3 ℃ (34.34 ℉) | lowest temperature: -7.7 ℃ (18.14 ℉) | rainfall: 36.9mm | rainy days: 8.2 |
| Sioux City | temperature: - | highest temperature: 0.3 ℃ (32.54 ℉) | lowest temperature: -10.3 ℃ (13.46 ℉) | rainfall: 20.5mm | rainy days: 6.9 |
| Cedar Rapids | temperature: - | highest temperature: 0.9 ℃ (33.62 ℉) | lowest temperature: -8 ℃ (17.6 ℉) | rainfall: 41.4mm | rainy days: 9.6 |
| Davenport | temperature: - | highest temperature: 0.9 ℃ (33.62 ℉) | lowest temperature: -7.9 ℃ (17.78 ℉) | rainfall: 43.1mm | rainy days: - |
| Waterloo | temperature: - | highest temperature: -0.5 ℃ (31.1 ℉) | lowest temperature: -10.2 ℃ (13.64 ℉) | rainfall: 30.1mm | rainy days: 8.3 |