July weather forecastIsabel, SD

July

Weather in July

July in Isabel, South Dakota, is a hot summer month, with an average temperature varying between 87.3°F (30.7°C) and 66°F (18.9°C).

Temperature

Temperature readings reach their annual highs in July, averaging 87.3°F (30.7°C) and a minimum average of 66°F (18.9°C).

Heat index

For most parts of July, the heat index is computed to be a hot 89.6°F (32°C). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. 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 July, the average relative humidity is 50%.

Rainfall

In July, the rain falls for 10.8 days. Throughout July, 1.89" (48mm) of precipitation is accumulated. In Isabel, during the entire year, the rain falls for 99.7 days and collects up to 16.06" (408mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In Isabel, the average length of the day in July is 15h and 15min.
On the first day of July in Isabel, sunrise is at 5:01 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 5:29 am and sunset at 8:14 pm MDT.

Sunshine

With an average of 11.5h of sunshine, July has the most sunshine of the year.

UV index

The month with the highest UV index is July, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: In July, the UV index of 7 transforms into the following advice:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.

Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

July, with an average high of 87.3°F (30.7°C) and a low of 66°F (18.9°C), signifies the warmest month of the year.

The high-temperature, in July, in Isabel, records 87.3°F (30.7°C), while the low-temperature is 66°F (18.9°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in July is computed to be 89.6°F (32°C).

The average relative humidity in July is 50%.

In Isabel, in July, it is raining for 10.8 days, with typically 1.89" (48mm) of accumulated precipitation.

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

In Isabel, the average day length in July is 15h and 15min.

On the first day of July, sunrise is at 5:01 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 5:29 am and sunset at 8:14 pm MDT.

July has the most sunshine of the year, with an average of 11.5h of sunshine.

In Isabel, the average sunshine duration in July is 11.5h.

With an average maximum UV index of 7, July is the month with the highest UV index.

The average daily maximum UV index in July is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

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

Jun

July

Aug

Average high temperature

78.6°F

87.3°F

84.7°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.9mph

11.4mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

13.8

10.8

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

13.4

16.6

Average UV index

Average cloud cover

27%

19%

Average visibility

6mi

Average temperature in July
Isabel, SD

Average high temperature in July: 87.3°F

The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (27°F).

Average low temperature in July: 66°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).

Average pressure in July
Isabel, SD

Average pressure in July: 29.9"Hg

The months with the highest atmospheric pressure are January and February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in July
Isabel, SD

Average wind speed in July: 10.5mph

The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest months (with the lowest average wind speed) are February and August (10.4mph).

Average humidity in July
Isabel, SD

Average humidity in July: 50%

The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are August and September (49%).

Average rainfall in July
Isabel, SD

Average rainfall in July: 1.89"

The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is January (0.51").

Average rainfall days in July
Isabel, SD

Average rainfall days in July: 10.8 days

The month with the highest number of rainy days is May (14.7 days).
The months with the least rainy days are January and February (3.3 days).

Average snowfall in July
Isabel, SD

Average snowfall in July: 0"

The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in July
Isabel, SD

Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in July /
Average sunshine in July
Isabel, SD

Average daylight in July: 15h and 18min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

Average sunshine in July: 11h and 30min

The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

Average sunshine days in July
Isabel, SD

Average sunshine days in July: 16.6 days

The month with the most sunshine days is September (20.4 days).
The month with the least sunshine days is April (12.4 days).

Average UV index in July
Isabel, SD

Average UV index in July: 7

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in July
Isabel, SD

Average cloud cover in July: 19

The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 19).

Average visibility in July
Isabel, SD

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).