July weather forecast
Saint Peters, MO

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Weather in July

July in Saint Peters, Missouri, is the pinnacle of summer. It is characterized by the year's hottest temperatures, elevated humidity levels, and generous sunshine. The peak temperature for the year is experienced in July, with average highs reaching 87.1°F (30.6°C). Despite the heat, rainfall persists, contributing to the heightened humidity. August sustains the hot and humid weather pattern common to July.

Temperature

In Saint Peters, the peak average temperatures are observed in July, with a high of 87.1°F (30.6°C) and a low of 68.4°F (20.2°C).

Heat index

July's mean heat index is evaluated at a very hot 102.2°F (39°C). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'felt air temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The average relative humidity in July is 77%.

Rainfall

In Saint Peters, in July, during 15.3 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. Throughout the year, there are 133.4 rainfall days, and 20.98" (533mm) of precipitation is accumulated.

Snowfall

In Saint Peters, snow does not fall in April through October.

Daylight

In Saint Peters, the average length of the day in July is 14h and 34min.
On the first day of July, sunrise is at 5:41 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 8:14 pm CDT.

Sunshine

The months with the most sunshine are June and July, with an average of 10.5h of sunshine.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Saint Peters. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: An average UV index of 6 in July transforms into this advice:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
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Frequently asked questions

What part of the year is the hottest in Saint Peters?

The temperatures in Saint Peters reach their highest averages in July, with highs of 87.1°F (30.6°C) and lows of 68.4°F (20.2°C).

How hot is July in Saint Peters?

July temperatures in Saint Peters vary between a high-temperature of 87.1°F (30.6°C) and a low-temperature of 68.4°F (20.2°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in July is evaluated at 102.2°F (39°C).

What is the average humidity in July in Saint Peters?

In July, the average relative humidity is 77%.

How many days does it rain in July in Saint Peters?

In Saint Peters, Missouri, in July, during 15.3 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

When it does not snow in Saint Peters?

April through October are months without snowfall in Saint Peters.

How many hours of daylight does Saint Peters have in July?

In July, the average day length in Saint Peters, Missouri, is 14h and 34min.

When are sunrise and sunset in July in Saint Peters?

On the first day of July in Saint Peters, sunrise is at 5:41 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 8:14 pm CDT.

What is the month with the most sunshine in Saint Peters?

June and July, with an average of 10.5h of sunshine, are months with the most sunshine in Saint Peters, Missouri.

How long on average sun shines in July in Saint Peters?

In July, the average sunshine duration in Saint Peters, Missouri, is 10.5h.

When is the highest UV index in Saint Peters?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

What is the UV index reading in July in Saint Peters?

In Saint Peters, Missouri, the average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health risk 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
Saint Peters, MO

Average temperature in July - Saint Peters, MO
  • Average high temperature in July: 87.1°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in July: 68.4°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

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Average pressure in July
Saint Peters, MO

Average pressure in July - Saint Peters, MO
  • Average pressure in July: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in July
Saint Peters, MO

Average wind speed in July - Saint Peters, MO
  • Average wind speed in July: 5.5mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).

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Average humidity in July
Saint Peters, MO

Average humidity in July - Saint Peters, MO
  • Average humidity in July: 77%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in July
Saint Peters, MO

Average rainfall in July - Saint Peters, MO
  • Average rainfall in July: 2.32"

The wettest month (with the highest rainfall) is April (2.48").
The driest month (with the least rainfall) is February (1.06").

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Average rainfall days in July
Saint Peters, MO

Average rainfall days in July - Saint Peters, MO
  • Average rainfall days in July: 15.3 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (6.7 days).

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Average snowfall in July
Saint Peters, MO

Average snowfall in July - Saint Peters, MO
  • Average snowfall in July: 0"

The month with the highest snowfall is February (1.65").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in July
Saint Peters, MO

Average snowfall days in July - Saint Peters, MO
  • Average snowfall days in July: 0 days

The months with the highest number of snowfall days are January and February (5.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in July /
Average sunshine in July
Saint Peters, MO

Average daylight in July / Average sunshine in July - Saint Peters, MO
  • Average daylight in July: 14h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in July: 10h and 3min

The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in July
Saint Peters, MO

Average sunshine days in July - Saint Peters, MO
  • Average sunshine days in July: 12.7 days

The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is July (12.7 days).

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Average UV index in July
Saint Peters, MO

Average UV index in July - Saint Peters, MO
  • Average UV index in July: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in July
Saint Peters, MO

Average cloud cover in July - Saint Peters, MO
  • Average cloud cover in July: 28

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in July
Saint Peters, MO

Average visibility in July - Saint Peters, MO
  • 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).

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Saint Peters, Missouri, USA

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