July weather forecast
Sinai, SD

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Weather in July

July, like June, in Sinai, South Dakota, is a moderately hot summer month, with temperature in the range of an average high of 81.3°F (27.4°C) and an average low of 62.2°F (16.8°C).

Temperature

Sinai's July weather, marked by an average high temperature of 81.3°F (27.4°C) and an average low temperature of 62.2°F (16.8°C), is the warmest in the year.

Heat index

Throughout July, the heat index is estimated at a tropical 86°F (30°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Heat index evaluations are typically in the context of light winds and shaded environments. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially crucial for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.

Humidity

In July, the average relative humidity is 74%.

Rainfall

In Sinai, South Dakota, during July, the rain falls for 14.8 days and regularly aggregates up to 3.03" (77mm) of precipitation. In Sinai, during the entire year, the rain falls for 125.5 days and collects up to 21.65" (550mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in July is 15h and 7min.
On the first day of the month, sunrise is at 5:48 am and sunset at 9:15 pm. On the last day of July, sunrise is at 6:15 am and sunset at 8:53 pm CDT.

Sunshine

The month with the most sunshine is July, with an average of 10.6h 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 estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A maximum UV index of 6 in July translates into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the hottest in Sinai?

The warmest temperatures in Sinai, South Dakota, occur during July, when averages reach a peak of 81.3°F (27.4°C) and a low of 62.2°F (16.8°C).

What is the temperature in July in Sinai?

The high-temperature, in July, in Sinai, records 81.3°F (27.4°C), while the low-temperature is 62.2°F (16.8°C). In July, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, is estimated at 86°F (30°C).

What is the average humidity in July in Sinai?

In July, the average relative humidity in Sinai, South Dakota, is 74%.

How many days does it rain in July in Sinai?

In Sinai, in July, during 14.8 rainfall days, 3.03" (77mm) of precipitation is typically accumulated.

When it does not snow in Sinai?

In Sinai, South Dakota, snow does not fall in June through September.

What is the average length of the day in July in Sinai?

The average day length in July is 15h and 7min.

When is the sunrise / sunset in July in Sinai?

On the first day of July in Sinai, sunrise is at 5:48 am and sunset at 9:15 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 8:53 pm CDT.

What month has the most sunshine in Sinai?

July has the most sunshine of the year in Sinai, South Dakota, with an average of 10.6h of sunshine.

How many hours of sunshine does Sinai have in July?

The average sunshine duration in July in Sinai is 10.6h.

When is the highest UV index in Sinai?

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

How high is the UV index in July in Sinai?

In July, the average daily maximum UV index in Sinai, South Dakota, is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.
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
Sinai, SD

Average temperature in July - Sinai, SD
  • Average high temperature in July: 81.3°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (20.7°F).

  • Average low temperature in July: 62.2°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (7°F).

Average pressure in July
Sinai, SD

Average pressure in July - Sinai, SD
  • Average pressure in July: 29.93"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed in July
Sinai, SD

Average wind speed in July - Sinai, SD
  • Average wind speed in July: 8.4mph

The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is July (8.4mph).

Average humidity in July
Sinai, SD

Average humidity in July - Sinai, SD
  • Average humidity in July: 74%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (68%).

Average rainfall in July
Sinai, SD

Average rainfall in July - Sinai, SD
  • Average rainfall in July: 3.03"

The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is November (0.67").

Average rainfall days in July
Sinai, SD

Average rainfall days in July - Sinai, SD
  • Average rainfall days in July: 14.8 days

The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is January (3.2 days).

Average snowfall in July
Sinai, SD

Average snowfall in July - Sinai, SD
  • Average snowfall in July: 0"

The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in July
Sinai, SD

Average snowfall days in July - Sinai, SD
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in July / Average sunshine in July - Sinai, SD
  • Average daylight in July: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in July: 10h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in July
Sinai, SD

Average sunshine days in July - Sinai, SD
  • Average sunshine days in July: 13.4 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (8.3 days).

Average UV index in July
Sinai, SD

Average UV index in July - Sinai, 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
Sinai, SD

Average cloud cover in July - Sinai, SD
  • Average cloud cover in July: 28

The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in July
Sinai, SD

Average visibility in July - Sinai, SD
  • Average visibility in July: 6mi

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

Sinai, South Dakota, USA

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