July weather forecastLewis, IA

July

Weather in July

July, the same as June, is another warm summer month in Lewis, Iowa, with an average temperature ranging between max 82.6°F (28.1°C) and min 65.1°F (18.4°C).

Temperature

With an average high-temperature of 82.6°F (28.1°C) and an average low-temperature of 65.1°F (18.4°C), July is the warmest month.

Heat index

For most parts of July, the heat index is computed to be a hot 89.6°F (32°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.
Research indicates the heat index considers values in shaded locales and with light winds. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is found by incorporating humidity levels into the air temperature measurement. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.

Humidity

In Lewis, the average relative humidity in July is 80%.

Rainfall

In Lewis, during July, the rain falls for 14 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Lewis, Iowa, during the entire year, the rain falls for 118.7 days and collects up to 20.79" (528mm) of precipitation.

Snowfall

In Lewis, snow does not fall in June through September.

Daylight

The average length of the day in July is 14h and 49min.
On the first day of July, sunrise is at 5:51 am and sunset at 8:57 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 8:38 pm CDT.

Sunshine

The month with the most sunshine is July, with an average of 10.4h of sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 6 during July translates into the following directions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.

Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

July is the month that records the highest temperatures, with averages ranging from a high of 82.6°F (28.1°C) to a low of 65.1°F (18.4°C).

The average high-temperature and low-temperature during July are 82.6°F (28.1°C) and 65.1°F (18.4°C) respectively. In July, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 89.6°F (32°C).

In Lewis, the average relative humidity in July is 80%.

In Lewis, in July, it is raining for 14 days, with typically 2.05" (52mm) of accumulated precipitation.

June through September are months without snowfall.

In Lewis, the average day length in July is 14h and 49min.

In July, on the first day of the month, sunrise is at 5:51 am and sunset at 8:57 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 8:38 pm CDT.

July has the most sunshine of the year, with an average of 10.4h of sunshine.

The average sunshine duration in July is 10.4h.

June through August, with an average maximum UV index of 6, are months with the highest UV index in Lewis.

In Lewis, the average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J July A S O N D

Jun

July

Aug

Average high temperature

79.9°F

82.6°F

81.1°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9mph

7.6mph

7.8mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

16.4

12.8

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

10.8

12.6

14.9

Average UV index

Average cloud cover

Average visibility

Average temperature in July
Lewis, IA

Average high temperature in July: 82.6°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (28.4°F).

Average low temperature in July: 65.1°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).

Average pressure in July
Lewis, IA

Average pressure in July: 29.95"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in July
Lewis, IA

Average wind speed in July: 7.1mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).

Average humidity in July
Lewis, IA

Average humidity in July: 80%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (69%).

Average rainfall in July
Lewis, IA

Average rainfall in July: 2.05"

The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.59").

Average rainfall days in July
Lewis, IA

Average rainfall days in July: 14 days

The month with the highest number of rainy days is June (16.4 days).
The month with the least rainy days is February (3.1 days).

Average snowfall in July
Lewis, IA

Average snowfall in July: 0"

The month with the highest snowfall is February (2.36").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in July
Lewis, IA

Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in July /
Average sunshine in July
Lewis, IA

Average daylight in July: 14h and 48min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

Average sunshine in July: 10h and 24min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days in July
Lewis, IA

Average sunshine days in July: 12.6 days

The month with the most sunshine days is December (21.2 days).
The month with the least sunshine days is June (10.8 days).

Average UV index in July
Lewis, IA

Average UV index in July: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

Average cloud cover in July
Lewis, IA

Average cloud cover in July: 28

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in July
Lewis, IA

Average visibility in July: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).