June weather forecast
Florissant, MO

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Weather in June

June welcomes summer in Florissant, which means longer daylight hours and an overall warmer climate. The most striking change from May is the surge in temperatures. Residents can enjoy outdoor activities to the fullest, given the dry, sunny weather. Planning trips and events during this month often provides lovely weather to visitors and residents alike.

Temperature

June's arrival coincides with a rise in the average high-temperature, moving from May's warm 74.8°F (23.8°C) to a still moderately hot 83.8°F (28.8°C). Throughout June, the nighttime temperature averages to a refreshing 66.7°F (19.3°C).

Heat index

During June, the heat index is calculated to be a tropical 91.4°F (33°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.

Humidity

The average relative humidity in June is 76%.

Rainfall

In June, the rain falls for 15.3 days. Throughout June, 3.54" (90mm) of precipitation is accumulated. Throughout the year, there are 149 rainfall days, and 31.61" (803mm) of precipitation is accumulated.

Snowfall

In Florissant, snow does not fall in April through October.

Daylight

The month with the longest days in Florissant is June, with an average of 14h and 48min of daylight.
On the first day of June, sunrise is at 5:37 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:30 pm CDT.

Sunshine

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

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In June, the average maximum UV index of 6 translates into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in June?

The average high-temperature and low-temperature during June are 83.8°F (28.8°C) and 66.7°F (19.3°C) respectively. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in June is calculated to be 91.4°F (33°C).

What is the average humidity in June?

In June, the average relative humidity in Florissant is 76%.

How much does it rain in June?

In Florissant, during June, the rain falls for 15.3 days and regularly aggregates up to 3.54" (90mm) of precipitation.

When it does not snow?

In Florissant, snow does not fall in April through October.

When are the longest days?

June has the longest days of the year, with an average of 14h and 48min of daylight.

What is the average length of the day in June?

In June, the average day length is 14h and 50min.

When are sunrise and sunset in June?

In June, on the first day of the month, sunrise is at 5:37 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:30 pm CDT.

What is the month with the most sunshine?

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

How long on average sun shines in June?

In Florissant, Missouri, the average sunshine duration in June is 10.5h.

What are the months with the highest UV index?

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

How high is the UV index in June?

The average daily maximum UV index in June in Florissant is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unprotected exposure to UV radiation.
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 June
Florissant, MO

Average temperature in June - Florissant, MO
  • Average high temperature in June: 83.8°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (37.2°F).

  • Average low temperature in June: 66.7°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).

Average pressure in June
Florissant, MO

Average pressure in June - Florissant, MO
  • Average pressure in June: 29.92"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).

Average wind speed in June
Florissant, MO

Average wind speed in June - Florissant, MO
  • Average wind speed in June: 6.5mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).

Average humidity in June
Florissant, MO

Average humidity in June - Florissant, MO
  • Average humidity in June: 76%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (70%).

Average rainfall in June
Florissant, MO

Average rainfall in June - Florissant, MO
  • Average rainfall in June: 3.54"

The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is February (1.69").

Average rainfall days in June
Florissant, MO

Average rainfall days in June - Florissant, MO
  • Average rainfall days in June: 15.3 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in June
Florissant, MO

Average snowfall in June - Florissant, MO
  • Average snowfall in June: 0"

The month with the highest snowfall is February (2.95").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in June
Florissant, MO

Average snowfall days in June - Florissant, MO
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in June /
Average sunshine in June
Florissant, MO

Average daylight in June / Average sunshine in June - Florissant, MO
  • Average daylight in June: 14h and 5min

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 June: 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 February (Average sunshine: 4h and 36min).

Average sunshine days in June
Florissant, MO

Average sunshine days in June - Florissant, MO
  • Average sunshine days in June: 11.7 days

The month with the most sunshine days is October (19 days).
The month with the least sunshine days is May (11 days).

Average UV index in June
Florissant, MO

Average UV index in June - Florissant, MO
  • Average UV index in June: 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).

Average cloud cover in June
Florissant, MO

Average cloud cover in June - Florissant, MO
  • Average cloud cover in June: 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).

Average visibility in June
Florissant, MO

Average visibility in June - Florissant, MO
  • Average visibility in June: 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).

Florissant, Missouri, USA

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