July weather forecastDelta, IA

July

Weather in July

July, like June, in Delta, Iowa, is a moderately hot summer month, with an average temperature fluctuating between 82°F (27.8°C) and 65.1°F (18.4°C).

Temperature

In Delta, Iowa, July is the warmest month, with temperatures averaging a high of 82°F (27.8°C) and a low of 65.1°F (18.4°C).

Heat index

In July, the heat index is computed to be a tropical 89.6°F (32°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.
For clarity, heat index numbers account for light winds and areas under shade. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.

Humidity

July is the most humid month in Delta, with an average relative humidity of 83%.

Rainfall

In July, the rain falls for 15.8 days. Throughout July, 2.76" (70mm) of precipitation is accumulated. In Delta, during the entire year, the rain falls for 137.9 days and collects up to 27.76" (705mm) of precipitation.

Snowfall

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

Daylight

In July, the average length of the day in Delta is 14h and 49min.
On the first day of the month, sunrise is at 5:40 am and sunset at 8:46 pm. On the last day of July, sunrise is at 6:04 am and sunset at 8:27 pm CDT.

Sunshine

The month with the most sunshine in Delta, Iowa, is July, with an average of 10.3h of sunshine.

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 6 during July translates into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.

Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

July is Delta's warmest month, registering average high temperatures of 82°F (27.8°C) and lows of 65.1°F (18.4°C).

The high-temperature during July is 82°F (27.8°C) and the low-temperature is 65.1°F (18.4°C). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is computed to be 89.6°F (32°C).

July is the most humid month, with an average relative humidity of 83%.

In Delta, the average relative humidity in July is 83%.

In Delta, Iowa, in July, during 15.8 rainfall days, 2.76" (70mm) of precipitation is typically accumulated.

June through September are months without snowfall.

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

On the first day of July in Delta, sunrise is at 5:40 am and sunset at 8:46 pm. On the last day of the month, sunrise is at 6:04 am and sunset at 8:27 pm CDT.

The month with the most sunshine is July, with an average of 10.3h of sunshine.

In Delta, Iowa, the average sunshine duration in July is 10.3h.

The months with the highest UV index in Delta are June and July, with an average maximum UV index of 6.

In July, the average daily maximum UV index in Delta, Iowa, is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe 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

79.3°F

82°F

81.1°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8.5mph

7.5mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

17.2

15.8

12.3

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

10.3

11.9

15.5

Average UV index

Average cloud cover

Average visibility

Average temperature in July
Delta, IA

Average high temperature in July: 82°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (28.6°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 (15.6°F).

Average pressure in July
Delta, IA

Average pressure in July: 29.96"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in July
Delta, IA

Average wind speed in July: 7mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).

Average humidity in July
Delta, IA

Average humidity in July: 83%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (72%).

Average rainfall in July
Delta, IA

Average rainfall in July: 2.76"

The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (0.98").

Average rainfall days in July
Delta, IA

Average rainfall days in July: 15.8 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (4.9 days).

Average snowfall in July
Delta, IA

Average snowfall in July: 0"

The month with the highest snowfall is January (4.06").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in July
Delta, IA

Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in July /
Average sunshine in July
Delta, 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 18min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

Average sunshine days in July
Delta, IA

Average sunshine days in July: 11.9 days

The month with the most sunshine days is December (19.1 days).
The month with the least sunshine days is June (10.3 days).

Average UV index in July
Delta, IA

Average UV index in July: 6

The months with the highest UV index are June and July (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
Delta, IA

Average cloud cover in July: 30

The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 29).

Average visibility in July
Delta, IA

Average visibility in July: 5mi

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).