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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, in Riley, Indiana, is a wintry winter month, with an average temperature varying between 22.1°F (-5.5°C) and 34.3°F (1.3°C). Riley witnesses the coldest weather in January, with temperatures averaging a high of 34.3°F (1.3°C) and a low of 22.1°F (-5.5°C). Weather in January »
Weather in February
The last month of the winter, February, is also a wintry month in Riley, Indiana, with an average temperature ranging between max 39.6°F (4.2°C) and min 25.5°F (-3.6°C). February's arrival brings an average high-temperature of a still icy 39.6°F (4.2°C), slightly deviating from January's 34.3°F (1.3°C). Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Riley, Indiana, with an average temperature ranging between min 36.1°F (2.3°C) and max 51.4°F (10.8°C). As February transitions into March, a change in temperatures is observed, with average highs moving from an icy 39.6°F (4.2°C) to a fresh 51.4°F (10.8°C). Weather in March »
Weather in April
April in Riley, Indiana, is an enjoyable spring month, with an average temperature varying between 62.4°F (16.9°C) and 46°F (7.8°C). The shift into April is characterized by a rise in the average high-temperature, transitioning from March's cool 51.4°F (10.8°C) to a comfortable 62.4°F (16.9°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Riley, Indiana, with an average temperature ranging between min 55.8°F (13.2°C) and max 72.5°F (22.5°C). May's onset is marked by a temperature increase, moving from an enjoyable 62.4°F (16.9°C) in April to an agreeable 72.5°F (22.5°C). Weather in May »
Weather in June
June, the first month of the summer in Riley, is a warm month, with an average temperature varying between 80.6°F (27°C) and 63.9°F (17.7°C). Riley's transition into June is noticed by a slight rise in the average high-temperature, advancing from an agreeable 72.5°F (22.5°C) in May to a moderately hot 80.6°F (27°C). Weather in June »
Weather in July
July, like June, in Riley, Indiana, is another warm summer month, with an average temperature varying between 65.8°F (18.8°C) and 82.8°F (28.2°C). Riley experiences its highest temperatures in July, with an average peak of 82.8°F (28.2°C) and a low of 65.8°F (18.8°C). The heat index for July is appraised at a hot 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Riley, is also a moderately hot month, with an average temperature fluctuating between 81.9°F (27.7°C) and 64°F (17.8°C). Riley experiences a minor change to a still moderately hot 81.9°F (27.7°C) in average high-temperature during August, closely reflecting July. Weather in August »
Weather in September
September, the first month of the autumn in Riley, is also a moderately hot month, with an average temperature fluctuating between 58.6°F (14.8°C) and 77°F (25°C). The onset of September brings an average high-temperature of a still moderately hot 77°F (25°C), nearly matching the August temperature. Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Riley, Indiana, with an average temperature ranging between max 64.2°F (17.9°C) and min 47.5°F (8.6°C). October's onset brings a slight change in high-temperatures, falling from a moderately hot 77°F (25°C) in September to a comfortable 64.2°F (17.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Riley, Indiana, with temperature in the range of an average high of 50.2°F (10.1°C) and an average low of 36.3°F (2.4°C). Riley's average high-temperature decreases in November, falling from an enjoyable 64.2°F (17.9°C) in October to a cool 50.2°F (10.1°C). Weather in November »
Weather in December
December, the first month of the winter in Riley, is also an icy month, with temperature in the range of an average low of 28.6°F (-1.9°C) and an average high of 39.6°F (4.2°C). Onset of December witnesses a reduction in the average high-temperature, falling from a fresh 50.2°F (10.1°C) in November to an icy 39.6°F (4.2°C). Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in Riley?
January is the coldest month in Riley, with the temperature often reaching an average high of 34.3°F (1.3°C) and an average low of 22.1°F (-5.5°C).
How many days does it rain in Riley?
Throughout the year, in Riley, Indiana, there are 147.1 rainfall days, and 25.87" (657mm) of precipitation is accumulated.
When does it snow in Riley?
January through April, November and December are months with snowfall in Riley.
How much does it snow in Riley?
In Riley, during the entire year, snow falls for 22.9 days and aggregates up to 7.4" (188mm) of snow.
What is the month with the least sunshine in Riley?
With an average of 4.3h of sunshine, January has the least sunshine of the year in Riley.
What are the months with the lowest UV index in Riley?
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the driest month in Riley?
February is the month with the least rainfall in Riley, Indiana. Rain falls for 7.8 days and accumulates 1.42" (36mm) of precipitation.
When is Daylight Saving Time (DST) in Riley?
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 rainiest month in Riley?
April is the month with the most rainfall in Riley. Rain falls for 14.4 days and accumulates 3.62" (92mm) of precipitation.
When it does not snow in Riley?
May through October are months without snowfall.
When are the longest days in Riley?
June has the longest days of the year in Riley, Indiana, with an average of 14h and 54min of daylight.
What month has the most sunshine in Riley?
With an average of 10.2h of sunshine, June has the most sunshine of the year in Riley, Indiana.
What is the month with the highest UV index in Riley?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Riley, Indiana.
What month is the hottest in Riley?
July is the warmest month of the year in Riley, Indiana, registering average temperatures as high as 82.8°F (28.2°C) and as low as 65.8°F (18.8°C).
What is the most humid month in Riley?
The most humid month in Riley, Indiana, is July, with an average relative humidity of 83%.
What is the least humid month in Riley?
With an average relative humidity of 72%, October is the least humid month in Riley, Indiana.
When does it snow the most in Riley?
December is the month with the most snowfall in Riley, Indiana. Snow falls for 4.8 days and accumulates 1.85" (47mm) of snow.
What is the month with the shortest days in Riley?
The month with the shortest days in Riley is December, with an average of 9h and 24min of daylight.
Average temperature
Riley, IN
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (34.3°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure
Riley, IN
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Riley, IN
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.8mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8mph - Average wind speed in June:
7mph
- Average wind speed in July:
5.9mph - Average wind speed in August:
5.9mph - Average wind speed in September:
6.6mph - Average wind speed in October:
8.5mph - Average wind speed in November:
9.1mph - Average wind speed in December:
9.1mph
The windiest months (with the highest average wind speed) are January and February (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).
Average humidity
Riley, IN
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Riley, IN
- Average rainfall in January:
1.81" - Average rainfall in February:
1.42" - Average rainfall in March:
2.01" - Average rainfall in April:
3.62" - Average rainfall in May:
3.03" - Average rainfall in June:
2.95"
- Average rainfall in July:
2.4" - Average rainfall in August:
2.01" - Average rainfall in September:
1.46" - Average rainfall in October:
1.73" - Average rainfall in November:
1.57" - Average rainfall in December:
1.85"
The wettest month (with the highest rainfall) is April (3.62").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days
Riley, IN
- Average rainfall days in January:
7.9 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
13 days - Average rainfall days in April:
14.4 days - Average rainfall days in May:
19 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
16.6 days - Average rainfall days in August:
12.6 days - Average rainfall days in September:
11.1 days - Average rainfall days in October:
10.9 days - Average rainfall days in November:
8.7 days - Average rainfall days in December:
9.4 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (7.8 days).
Average snowfall
Riley, IN
The month with the highest snowfall is December (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Riley, IN
- Average snowfall days in January:
6.9 days - Average snowfall days in February:
5.5 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.5 days - Average snowfall days in May:
0 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 days - Average snowfall days in November:
1.9 days - Average snowfall days in December:
4.8 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Riley, IN
- Average daylight in January:
9h and 5min - 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 2min - Average daylight in June:
14h and 5min
- 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:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
5h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 0min - Average sunshine in May:
8h and 4min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 1min - Average sunshine in September:
8h and 3min - Average sunshine in October:
7h and 0min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Riley, IN
- Average sunshine days in January:
17.2 days - Average sunshine days in February:
15.1 days - Average sunshine days in March:
15.2 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
9.3 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
11.6 days - Average sunshine days in August:
15.5 days - Average sunshine days in September:
16.8 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
19 days - Average sunshine days in December:
17.7 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (9.3 days).
Average UV index
Riley, IN
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover
Riley, IN
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are June, August and September (Cloud cover 31).
Average visibility
Riley, IN
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Riley, Indiana, USA
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