Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average snowfall in July
- Average snowfall days in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
July, with its average high-temperature of 84°F (28.9°C) and an average low-temperature of 64.9°F (18.3°C), holds the record as the warmest month.Heat index
The heat index value for July is estimated at a tropical 91.4°F (33°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.It is emphasized that the heat index's values are meant for shaded zones with mild winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
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. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
The average relative humidity in July is 75%.Rainfall
In Jefferson, during July, the rain falls for 12.7 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, there are 122 rainfall days, and 21.61" (549mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Jefferson.Daylight
In July, the average length of the day in Jefferson is 14h and 56min.On the first day of July, sunrise is at 5:52 am and sunset at 9:07 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 8:47 pm CDT.
Sunshine
With an average of 10.7h of sunshine, July has the most sunshine of the year.UV index
June and July, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 6 during July translates into the following directions:
Take precautions against overexposure. Protection against sun damage is needed. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Frequently asked questions
What part of the year is the hottest in Jefferson?
Is it hot in Jefferson during July?
What is the average humidity in July in Jefferson?
How much does it rain in Jefferson in July?
When it does not snow in Jefferson?
How many hours of daylight does Jefferson have in July?
When are sunrise and sunset in July in Jefferson?
What month has the most sunshine in Jefferson?
How many hours of sunshine does Jefferson have in July?
What is the month with the highest UV index in Jefferson?
What is the UV index intensity in July in Jefferson?
Average temperature in July
Jefferson, SD
- Average high temperature in July: 84°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in July: 64.9°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in July
Jefferson, SD
- Average pressure in July: 29.94"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in July
Jefferson, SD
- Average wind speed in July: 7.6mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in July
Jefferson, SD
- Average humidity in July: 75%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).
Average rainfall in July
Jefferson, SD
- Average rainfall in July: 1.89"
The wettest months (with the highest rainfall) are May and June (3.03").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in July
Jefferson, SD
- Average rainfall days in July: 12.7 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in July
Jefferson, SD
- Average snowfall in July: 0"
The month with the highest snowfall is January (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Jefferson, SD
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Jefferson, SD
- Average daylight in July: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in July: 10h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in July
Jefferson, SD
- Average sunshine days in July: 15 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in July
Jefferson, SD
- Average UV index in July: 6
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in July
Jefferson, SD
- Average cloud cover in July: 26
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in July
Jefferson, 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).
Jefferson, South Dakota, USA
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