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, known for its average high temperature of 81°F (27.2°C) and an average low temperature of 61.3°F (16.3°C), is the warmest month.Heat index
The heat index value during July is calculated to be 84.2°F (29°C). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.Note that heat index values are valued for light wind and location in the shade. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Humidity
In July, the average relative humidity in Grenville is 71%.Rainfall
July is the month with the most rainfall. Rain falls for 14.4 days and accumulates 3.58" (91mm) of precipitation.Snowfall
In Grenville, snow does not fall in June through September.Daylight
In Grenville, the average length of the day in July is 15h and 16min.On the first day of the month, sunrise is at 5:45 am and sunset at 9:21 pm. On the last day of July, sunrise is at 6:13 am and sunset at 8:58 pm CDT.
Sunshine
The month with the most sunshine is July, with an average of 10.7h of sunshine.UV index
June and July, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In July, the maximum UV index of 6 suggests these recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the hottest in Grenville?
What are the temperatures in July?
What is the average humidity in July?
What is the rainiest month?
How much does it rain in July?
When it does not snow?
How many hours of daylight does Grenville have in July?
What time are sunrise and sunset in July?
What month has the most sunshine?
How long on average sun shines in July?
When is the highest UV index?
How high is the UV index in July?
Average temperature in July
Grenville, SD
- Average high temperature in July: 81°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (18.9°F).
- Average low temperature in July: 61.3°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (5°F).
Average pressure in July
Grenville, SD
- Average pressure in July: 29.92"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in July
Grenville, SD
- Average wind speed in July: 8.7mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is July (8.7mph).
Average humidity in July
Grenville, SD
- Average humidity in July: 71%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is September (66%).
Average rainfall in July
Grenville, SD
- Average rainfall in July: 3.58"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days in July
Grenville, SD
- Average rainfall days in July: 14.4 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in July
Grenville, SD
- Average snowfall in July: 0"
The month with the highest snowfall is December (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Grenville, SD
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Grenville, SD
- Average daylight in July: 15h and 2min
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: 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: 3h and 12min).
Average sunshine days in July
Grenville, SD
- Average sunshine days in July: 13.7 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in July
Grenville, SD
- 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, November and December (UV index 1).
Average cloud cover in July
Grenville, SD
- Average cloud cover in July: 27
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in July
Grenville, SD
- Average visibility in July: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Grenville, South Dakota, USA
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