July weather forecast
Ottumwa, IA

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Weather in July

July, the peak of summer in Ottumwa, boasts the highest average temperature of the year, hitting a scorching 82.6°F (28.1°C). The town is lush with greenery, thanks to the sunlight that lasts over 14.8 hours per day. Conversely, rain showers are relatively less frequent, and the winds mild, making it perfect weather for water-based activities. Daily life flourishes under the long sunny days, with residents taking full advantage of the pleasant summer heat. July is characterized by its vibrant colors and outdoor festivities, making it one of the most lively months in Ottumwa.

Temperature

Ottumwa's temperatures peak on average in July, reaching 82.6°F (28.1°C) at their highest and 65.3°F (18.5°C) at their lowest.

Heat index

The average heat index in July is computed to be a tropical 91.4°F (33°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
Note that heat index values are valued for light wind and location in the shade. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in July is 82%.

Rainfall

In Ottumwa, in July, it is raining for 15.1 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, in Ottumwa, Iowa, there are 134.5 rainfall days, and 27.17" (690mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Ottumwa.

Daylight

The average length of the day in July in Ottumwa, Iowa, is 14h and 47min.
On the first day of July in Ottumwa, Iowa, sunrise is at 5:41 am and sunset at 8:45 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 8:26 pm CDT.

Sunshine

July has the most sunshine of the year in Ottumwa, with an average of 10.2h of sunshine.

UV index

The months with the highest UV index in Ottumwa are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 6 during July leads to these instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete 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

What are the warmest months in Ottumwa?

The month of July sees the average highest temperatures in Ottumwa, Iowa, reaching 82.6°F (28.1°C) at the peak and 65.3°F (18.5°C) at the low.

Is it hot in Ottumwa during July?

Ottumwa in July has an average high-temperature of 82.6°F (28.1°C) and an average low-temperature of 65.3°F (18.5°C). In July, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is computed to be 91.4°F (33°C).

What is the average humidity in July in Ottumwa?

In Ottumwa, Iowa, the average relative humidity in July is 82%.

How many days does it rain in July in Ottumwa?

In Ottumwa, Iowa, in July, during 15.1 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

When it does not snow in Ottumwa?

June through September are months without snowfall in Ottumwa.

How many hours of daylight does Ottumwa have in July?

In Ottumwa, the average day length in July is 14h and 47min.

When are sunrise and sunset in July in Ottumwa?

In July, on the first day of the month, sunrise is at 5:41 am and sunset at 8:45 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 8:26 pm CDT.

What month has the most sunshine in Ottumwa?

July has the most sunshine of the year in Ottumwa, Iowa, with an average of 10.2h of sunshine.

How many hours of sunshine does Ottumwa have in July?

In Ottumwa, Iowa, the average sunshine duration in July is 10.2h.

What are the months with the highest UV index in Ottumwa?

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

What is the UV index reading in July in Ottumwa?

In Ottumwa, Iowa, the average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Ottumwa, IA

Average temperature in July - Ottumwa, 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 (29.3°F).

  • Average low temperature in July: 65.3°F

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

Average pressure in July
Ottumwa, IA

Average pressure in July - Ottumwa, 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
Ottumwa, IA

Average wind speed in July - Ottumwa, IA
  • Average wind speed in July: 7mph

The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).

Average humidity in July
Ottumwa, IA

Average humidity in July - Ottumwa, IA
  • Average humidity in July: 82%

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

Average rainfall in July
Ottumwa, IA

Average rainfall in July - Ottumwa, IA
  • Average rainfall in July: 2.32"

The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is January (1.06").

Average rainfall days in July
Ottumwa, IA

Average rainfall days in July - Ottumwa, IA
  • Average rainfall days in July: 15.1 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (5.2 days).

Average snowfall in July
Ottumwa, IA

Average snowfall in July - Ottumwa, IA
  • Average snowfall in July: 0"

The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in July
Ottumwa, IA

Average snowfall days in July - Ottumwa, IA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in July / Average sunshine in July - Ottumwa, IA
  • Average daylight in July: 14h and 5min

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 1min

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

Average sunshine days in July
Ottumwa, IA

Average sunshine days in July - Ottumwa, IA
  • Average sunshine days in July: 13.4 days

The month with the most sunshine days is December (18.9 days).
The month with the least sunshine days is May (11.6 days).

Average UV index in July
Ottumwa, IA

Average UV index in July - Ottumwa, 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, November and December (UV index 2).

Average cloud cover in July
Ottumwa, IA

Average cloud cover in July - Ottumwa, IA
  • Average cloud cover in July: 30

The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are August and September (Cloud cover 29).

Average visibility in July
Ottumwa, IA

Average visibility in July - Ottumwa, 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).

Ottumwa, Iowa, USA

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