June weather forecast
Alton, IN

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Weather in June

The first month of the summer, June, is also a moderately hot month in Alton, Indiana, with an average temperature varying between 63.9°F (17.7°C) and 83.8°F (28.8°C).

Temperature

June's arrival brings a modest temperature shift, moving from a warm 75.4°F (24.1°C) in May to a still moderately hot 83.8°F (28.8°C). The nights of June anticipate an average low-temperature of 63.9°F (17.7°C).

Heat index

During June, the heat index is estimated at a hot 91.4°F (33°C). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
Always consider that heat index estimations are for light winds and places in the shade. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.

Humidity

The average relative humidity in June is 76%.

Rainfall

In June, the rain falls for 14.9 days. Throughout June, 2.56" (65mm) of precipitation is accumulated. In Alton, during the entire year, the rain falls for 160 days and collects up to 29.45" (748mm) of precipitation.

Snowfall

May through August are months without snowfall.

Daylight

With an average of 14h and 48min of daylight, June has the longest days of the year.
On the first day of June, sunrise is at 6:24 am and sunset at 9:03 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 9:12 pm EDT.

Sunshine

In Alton, the average sunshine in June is 10.2h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index, 6 in June, converts into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in June?

In Alton, in June, the average high-temperature is 83.8°F (28.8°C), and the average low-temperature is 63.9°F (17.7°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in June is estimated at 91.4°F (33°C).

What is the average humidity in June?

In June, the average relative humidity is 76%.

How much does it rain in June?

In Alton, in June, it is raining for 14.9 days, with typically 2.56" (65mm) of accumulated precipitation.

When it does not snow?

May through August are months without snowfall.

When are the longest days?

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

How many hours of daylight does Alton have in June?

In June, the average day length is 14h and 46min.

When is the sunrise / sunset in June in Alton?

On the first day of June, sunrise is at 6:24 am and sunset at 9:03 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 9:12 pm EDT.

How many hours of sunshine does Alton have in June?

In June, the average sunshine duration is 10.2h.

What is the month with the highest UV index?

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

What is the UV index reading in June?

In June, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's 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
Alton, IN

Average temperature in June - Alton, IN
  • 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 (38.8°F).

  • Average low temperature in June: 63.9°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

Average pressure in June
Alton, IN

Average pressure in June - Alton, IN
  • Average pressure in June: 29.95"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in June
Alton, IN

Average wind speed in June - Alton, IN
  • Average wind speed in June: 5.6mph

The windiest months (with the highest average wind speed) are January and February (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

Average humidity in June
Alton, IN

Average humidity in June - Alton, IN
  • Average humidity in June: 76%

The months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is October (74%).

Average rainfall in June
Alton, IN

Average rainfall in June - Alton, IN
  • Average rainfall in June: 2.56"

The wettest month (with the highest rainfall) is April (3.31").
The driest month (with the least rainfall) is September (1.61").

Average rainfall days in June
Alton, IN

Average rainfall days in June - Alton, IN
  • Average rainfall days in June: 14.9 days

The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (9.8 days).

Average snowfall in June
Alton, IN

Average snowfall in June - Alton, IN
  • Average snowfall in June: 0"

The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July and August (0").

Average snowfall days in June
Alton, IN

Average snowfall days in June - Alton, IN
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are May, June, July and August (0 days).

Average daylight in June /
Average sunshine in June
Alton, IN

Average daylight in June / Average sunshine in June - Alton, IN
  • 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 36min).

  • Average sunshine in June: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).

Average sunshine days in June
Alton, IN

Average sunshine days in June - Alton, IN
  • Average sunshine days in June: 12.3 days

The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is May (11.1 days).

Average UV index in June
Alton, IN

Average UV index in June - Alton, IN
  • 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
Alton, IN

Average cloud cover in June - Alton, IN
  • Average cloud cover in June: 32

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in June
Alton, IN

Average visibility in June - Alton, IN
  • Average visibility in June: 6mi

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

Alton, Indiana, USA

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