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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Keystone, Indiana, is a freezing cold winter month, with an average temperature ranging between min 20.1°F (-6.6°C) and max 31.6°F (-0.2°C). January, having an average high-temperature of 31.6°F (-0.2°C) and an average low-temperature of 20.1°F (-6.6°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Keystone, Indiana, with an average temperature fluctuating between 35.8°F (2.1°C) and 23.5°F (-4.7°C). Keystone's February average high-temperature settles at an icy 35.8°F (2.1°C), showing a near match with the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Keystone, Indiana, with an average temperature varying between 47.5°F (8.6°C) and 32.9°F (0.5°C). The onset of March marks an increase in the average high-temperature, moving from a cold 35.8°F (2.1°C) in February to a chilly 47.5°F (8.6°C). Weather in March »
Weather in April
April is a refreshing spring month in Keystone, Indiana, with an average temperature fluctuating between 59.5°F (15.3°C) and 43.2°F (6.2°C). The onset of April marks an increase in the average high-temperature, moving from a chilly 47.5°F (8.6°C) in March to a refreshing 59.5°F (15.3°C). Weather in April »
Weather in May
May, the last month of the spring in Keystone, is a pleasant month, with an average temperature varying between 54.3°F (12.4°C) and 71.1°F (21.7°C). The average high-temperature increases in May, moving from a moderate 59.5°F (15.3°C) in April to a pleasant 71.1°F (21.7°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Keystone, Indiana, with an average temperature fluctuating between 61.9°F (16.6°C) and 78.3°F (25.7°C). A minor escalation in the average high-temperature is seen with the onset of June, moving from an agreeable 71.1°F (21.7°C) in May to a warm 78.3°F (25.7°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Keystone, Indiana, with an average temperature fluctuating between 81.1°F (27.3°C) and 64°F (17.8°C). Keystone's warmest month, July, registers temperatures that range from a high of 81.1°F (27.3°C) to a low of 64°F (17.8°C). During July, the heat index is computed to be a hot 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Keystone, Indiana, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 79.2°F (26.2°C). Keystone ushers in August with an average high-temperature of a still moderately hot 79.2°F (26.2°C), showing a close resemblance to the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Keystone, Indiana, with an average temperature ranging between min 56.3°F (13.5°C) and max 74.1°F (23.4°C). In September, the average high-temperature registers at a still moderately hot 74.1°F (23.4°C), nearly identical to August's 79.2°F (26.2°C). Weather in September »
Weather in October
October, like September, in Keystone, Indiana, is another refreshing autumn month, with an average temperature varying between 46.2°F (7.9°C) and 61.7°F (16.5°C). Keystone's average high-temperature decreases in October, falling from a moderately hot 74.1°F (23.4°C) in September to an enjoyable 61.7°F (16.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Keystone, is another chilly month, with an average temperature ranging between min 35.1°F (1.7°C) and max 48.2°F (9°C). November comes with a drop in the average high-temperature, falling from October's comfortable 61.7°F (16.5°C) to a frosty 48.2°F (9°C). Weather in November »
Weather in December
December, the first month of the winter in Keystone, is still a cold month, with an average temperature ranging between max 36.7°F (2.6°C) and min 27.3°F (-2.6°C). Transition into December marks a drop in the average high-temperature, moving from a frosty 48.2°F (9°C) in November to a wintry 36.7°F (2.6°C). Weather in December »
Updated: Aug 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
January stands out as Keystone's coldest month, with an average high-temperature of 31.6°F (-0.2°C) and a low-temperature of 20.1°F (-6.6°C).
What is the most humid month?
January, February and December, with an average relative humidity of 83%, are most humid months.
How many days does it rain?
Throughout the year, there are 137.2 rainfall days, and 17.95" (456mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, October through December.
How much does it snow?
Throughout the year, there are 35.6 snowfall days, and 7.64" (194mm) of snow is accumulated.
What is the month with the least sunshine in Keystone?
The month with the least sunshine is January, with an average of 3.5h of sunshine.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 5.4 days and typically collects 0.98" (25mm) of precipitation.
What is the snowiest month?
February is the month with the most snowfall in Keystone. Snow falls for 8.8 days and accumulates 2.2" (56mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the wettest month?
The month with the most rainfall is May, when the rain falls for 17.5 days and typically aggregates up to 2.24" (57mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 0min of daylight.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Keystone.
What is the warmest month?
July is the month that records the highest temperatures, with averages ranging from a high of 81.1°F (27.3°C) to a low of 64°F (17.8°C).
What month has the most sunshine in Keystone?
The month with the most sunshine is July, with an average of 10h of sunshine.
What is the least humid month?
The least humid month is October, with an average relative humidity of 74%.
What is the month with the shortest days?
With an average of 9h and 18min of daylight, December has the shortest days of the year.
What is the month with the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Keystone, IN
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.6°F).
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure
Keystone, IN
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.11"Hg
The months with the highest atmospheric pressure are January and November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Keystone, IN
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.4mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.2mph - Average wind speed in August:
6mph - Average wind speed in September:
6.9mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity
Keystone, IN
The months with the highest relative humidity are January, February and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Keystone, IN
- Average rainfall in January:
1.1" - Average rainfall in February:
0.98" - Average rainfall in March:
1.69" - Average rainfall in April:
1.81" - Average rainfall in May:
2.24" - Average rainfall in June:
1.93"
The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days
Keystone, IN
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
5.4 days - Average rainfall days in March:
11.2 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
14 days
- Average rainfall days in July:
14.7 days - Average rainfall days in August:
13 days - Average rainfall days in September:
12.4 days - Average rainfall days in October:
11.3 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (5.4 days).
Average snowfall
Keystone, IN
The month with the highest snowfall is February (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Keystone, IN
- Average snowfall days in January:
9.6 days - Average snowfall days in February:
8.8 days - Average snowfall days in March:
4.4 days - Average snowfall days in April:
1.2 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.5 days - Average snowfall days in November:
2.9 days - Average snowfall days in December:
8.1 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Keystone, IN
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
3h and 3min - Average sunshine in February:
4h and 4min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 0min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 3min - Average sunshine in September:
7h and 5min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 1min - Average sunshine in December:
3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
Keystone, IN
- Average sunshine days in January:
18 days - Average sunshine days in February:
14.9 days - Average sunshine days in March:
15.8 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
12.8 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
17.8 days - Average sunshine days in November:
18.9 days - Average sunshine days in December:
16.4 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (11.3 days).
Average UV index
Keystone, IN
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Keystone, IN
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility
Keystone, IN
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are August and September (5mi).
Keystone, Indiana, USA
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