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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, like December, is a freezing cold winter month in Keystone, Indiana, 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
February, the last month of the winter in Keystone, is an icy month, with temperature in the range of an average low of 23.5°F (-4.7°C) and an average high of 35.8°F (2.1°C). Keystone's transition from January to February introduces an average high-temperature of a cold 35.8°F (2.1°C), marking an insignificant variation from the 31.6°F (-0.2°C). Weather in February »
Weather in March
March, the first month of the spring in Keystone, is a frosty month, with an average temperature varying between 32.9°F (0.5°C) and 47.5°F (8.6°C). March's arrival brings a change in high-temperatures, moving from a wintry 35.8°F (2.1°C) in February to a frosty 47.5°F (8.6°C). Weather in March »
Weather in April
April is a mild spring month in Keystone, Indiana, with temperature in the range of an average high of 59.5°F (15.3°C) and an average low of 43.2°F (6.2°C). The shift into April is characterized by a rise in the average high-temperature, transitioning from March's chilly 47.5°F (8.6°C) to a moderate 59.5°F (15.3°C). Weather in April »
Weather in May
May, the last month of the spring in Keystone, is an agreeable month, with temperature in the range of an average high of 71.1°F (21.7°C) and an average low of 54.3°F (12.4°C). May brings an increase in the average high-temperature, progressing from a moderate 59.5°F (15.3°C) in April to an agreeable 71.1°F (21.7°C). Weather in May »
Weather in June
June, the first month of the summer in Keystone, is a warm month, with an average temperature ranging between min 61.9°F (16.6°C) and max 78.3°F (25.7°C). Keystone's weather in June shows a minor rise in the average high-temperature, moving slightly up from May's pleasant 71.1°F (21.7°C) to a warm 78.3°F (25.7°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Keystone, Indiana, with temperature in the range of an average low of 64°F (17.8°C) and an average high of 81.1°F (27.3°C). July, with its average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 64°F (17.8°C), holds the record as the warmest month. The average heat index in July is estimated at a tropical 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Keystone, is also a moderately hot month, with an average temperature varying between 61.7°F (16.5°C) and 79.2°F (26.2°C). Keystone's weather in August indicates an average high-temperature of a still warm 79.2°F (26.2°C), nearly consistent with the 81.1°F (27.3°C) of July. Weather in August »
Weather in September
September, the first month of the autumn in Keystone, is also a moderately hot month, with an average temperature fluctuating between 56.3°F (13.5°C) and 74.1°F (23.4°C). The arrival of September sees an average high-temperature of a still moderately hot 74.1°F (23.4°C), hardly diverging from August's 79.2°F (26.2°C). Weather in September »
Weather in October
October, like September, in Keystone, Indiana, is another comfortable autumn month, with an average temperature fluctuating between 46.2°F (7.9°C) and 61.7°F (16.5°C). Onset of October witnesses a reduction in the average high-temperature, falling from a warm 74.1°F (23.4°C) in September to a comfortable 61.7°F (16.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Keystone, Indiana, with an average temperature ranging between min 35.1°F (1.7°C) and max 48.2°F (9°C). November's arrival correlates with a reduction in the average high-temperature, down from a comfortable 61.7°F (16.5°C) in October to a chilly 48.2°F (9°C). Weather in November »
Weather in December
December, the first month of the winter in Keystone, is also a wintry month, with temperature in the range of an average low of 27.3°F (-2.6°C) and an average high of 36.7°F (2.6°C). The shift from November to December corresponds with a decrease in the average high-temperature, down to an icy 36.7°F (2.6°C) from a chilly 48.2°F (9°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Keystone?
Keystone's January weather reaches an average high of 31.6°F (-0.2°C) and an average low of 20.1°F (-6.6°C), making it the coldest month.
What are the most humid months in Keystone?
The months with the highest humidity in Keystone, Indiana, are January, February and December, with an average relative humidity of 83%.
How much does it rain in Keystone?
Throughout the year, in Keystone, there are 137.2 rainfall days, and 17.95" (456mm) of precipitation is accumulated.
When does it snow in Keystone?
Months with snowfall in Keystone, Indiana, are January through April, October through December.
How many days does it snow in Keystone?
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 in Keystone?
February is the month with the least rainfall in Keystone. Rain falls for 5.4 days and accumulates 0.98" (25mm) of precipitation.
When does it snow the most in Keystone?
February is the month with the most snowfall in Keystone, Indiana. Snow falls for 8.8 days and accumulates 2.2" (56mm) of snow.
When is Daylight Saving Time (DST) in Keystone?
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 in Keystone?
The month with the most rainfall in Keystone, Indiana, 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 in Keystone?
In Keystone, Indiana, snow does not fall in May through September.
When are the longest days in Keystone?
June has the longest days of the year in Keystone, with an average of 15h and 0min of daylight.
When is the highest UV index in Keystone?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Keystone, Indiana.
What is the hottest time of year in Keystone?
The warmest period tends to be July, when average temperatures fluctuate between a high of 81.1°F (27.3°C) and 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 in Keystone?
October is the least humid month in Keystone, with an average relative humidity of 74%.
What is the month with the shortest days in Keystone?
With an average of 9h and 18min of daylight, December has the shortest days of the year in Keystone.
What is the month with the lowest UV index in Keystone?
With an average maximum UV index of 1, December is the month with the lowest UV index in Keystone.
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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