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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, is another cold winter month in Letts, Indiana, with an average temperature fluctuating between 22.8°F (-5.1°C) and 34.9°F (1.6°C). Letts records the coldest temperatures in January, averaging a high of 34.9°F (1.6°C) and a low of 22.8°F (-5.1°C). Weather in January »
Weather in February
February, the last month of the winter in Letts, is another cold month, with an average temperature varying between 39.9°F (4.4°C) and 26.1°F (-3.3°C). February's arrival shows an average high-temperature of a still cold 39.9°F (4.4°C), hardly different from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Letts, is a fresh month, with an average temperature fluctuating between 35.4°F (1.9°C) and 50.9°F (10.5°C). March's arrival is marked by an increase in the average high-temperature, moving from a wintry 39.9°F (4.4°C) in February to a cool 50.9°F (10.5°C). Weather in March »
Weather in April
April is a comfortable spring month in Letts, Indiana, with an average temperature fluctuating between 63°F (17.2°C) and 45.7°F (7.6°C). April's arrival sees a rise in the average high-temperature, jumping from March's fresh 50.9°F (10.5°C) to a refreshing 63°F (17.2°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Letts, Indiana, with temperature in the range of an average high of 72.9°F (22.7°C) and an average low of 55.9°F (13.3°C). May's onset is marked by a temperature increase, moving from an enjoyable 63°F (17.2°C) in April to an agreeable 72.9°F (22.7°C). Weather in May »
Weather in June
June, the first month of the summer in Letts, is a warm month, with an average temperature varying between 62.8°F (17.1°C) and 80.2°F (26.8°C). June's onset is marked by a subtle temperature increase, moving from an agreeable 72.9°F (22.7°C) in May to a warm 80.2°F (26.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Letts, Indiana, with an average temperature ranging between max 83.1°F (28.4°C) and min 65.3°F (18.5°C). July is the month when Letts sees the highest average temperatures, with a high of 83.1°F (28.4°C) and a low of 65.3°F (18.5°C). Throughout July, the heat index is estimated at a hot 91.4°F (33°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Letts, Indiana, with an average temperature varying between 63.5°F (17.5°C) and 82°F (27.8°C). Letts ushers in August with an average high-temperature of a still warm 82°F (27.8°C), showing a close resemblance to the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Letts, is still a warm month, with an average temperature fluctuating between 76.3°F (24.6°C) and 58.3°F (14.6°C). The transition into September subtly indicates a reduction in the average high-temperature, down to a still moderately hot 76.3°F (24.6°C) from August's 82°F (27.8°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Letts, Indiana, with an average temperature varying between 64°F (17.8°C) and 47.1°F (8.4°C). In the transition to October, Letts observes a drop in the average high-temperature, moving from a warm 76.3°F (24.6°C) in September to a comfortable 64°F (17.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Letts, is another cool month, with an average temperature ranging between max 50.9°F (10.5°C) and min 36.5°F (2.5°C). Stepping into November, Letts observes a temperature decline, with the average high falling from October's comfortable 64°F (17.8°C) to a cool 50.9°F (10.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Letts, Indiana, with an average temperature ranging between max 40.6°F (4.8°C) and min 29.5°F (-1.4°C). Stepping into December, Letts observes a temperature decline, with the average high falling from November's cool 50.9°F (10.5°C) to an icy 40.6°F (4.8°C). Weather in December »
Updated: Jul 24, 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 is the coldest month?
Letts's January weather reaches an average high of 34.9°F (1.6°C) and an average low of 22.8°F (-5.1°C), making it the coldest month.
How many days does it rain?
Throughout the year, there are 137.6 rainfall days, and 17.99" (457mm) of precipitation is accumulated.
When does it snow?
January through April, October through December are months with snowfall.
How much does it snow?
Throughout the year, there are 29.3 snowfall days, and 5.35" (136mm) of snow is accumulated.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4h of sunshine.
What is the snowiest month?
March is the month with the most snowfall. Snow falls for 4.6 days and accumulates 1.46" (37mm) 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 rainiest month?
May is the month with the most rainfall. Rain falls for 15.4 days and accumulates 2.01" (51mm) of precipitation.
When it does not snow?
In Letts, snow does not fall in May through September.
When are the longest days?
The month with the longest days is June, with an average of 14h and 54min of daylight.
When is the highest UV index?
The months with the highest UV index in Letts are June through August, with an average maximum UV index of 6.
What is the warmest month?
Letts experiences its highest temperatures in July, with an average peak of 83.1°F (28.4°C) and a low of 65.3°F (18.5°C).
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.3h of sunshine.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 11.3 days and typically collects 0.98" (25mm) of precipitation.
What is the least humid month?
With an average relative humidity of 74%, October is the least humid month.
What is the most humid month?
The most humid month is December, with an average relative humidity of 82%.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 30min of daylight.
When is the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Letts, IN
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (34.9°F).
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure
Letts, IN
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"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:
30.03"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.12"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Letts, IN
- Average wind speed in January:
9.1mph - Average wind speed in February:
9.1mph - Average wind speed in March:
8.8mph - Average wind speed in April:
9mph - Average wind speed in May:
7.2mph - Average wind speed in June:
6.4mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.4mph - Average wind speed in September:
6.1mph - Average wind speed in October:
7.6mph - Average wind speed in November:
8.1mph - Average wind speed in December:
8.5mph
The windiest months (with the highest average wind speed) are January and February (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).
Average humidity
Letts, IN
The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Letts, IN
- Average rainfall in January:
1.3" - Average rainfall in February:
1.42" - Average rainfall in March:
1.46" - Average rainfall in April:
1.89" - Average rainfall in May:
2.01" - Average rainfall in June:
1.73"
- Average rainfall in July:
1.81" - Average rainfall in August:
1.38" - Average rainfall in September:
0.98" - Average rainfall in October:
1.46" - Average rainfall in November:
1.3" - Average rainfall in December:
1.26"
The wettest month (with the highest rainfall) is May (2.01").
The driest month (with the least rainfall) is September (0.98").
Average rainfall days
Letts, IN
- Average rainfall days in January:
8 days - Average rainfall days in February:
7.9 days - Average rainfall days in March:
12.1 days - Average rainfall days in April:
14.4 days - Average rainfall days in May:
15.4 days - Average rainfall days in June:
13.2 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
10 days - Average rainfall days in November:
8 days - Average rainfall days in December:
9.9 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is February (7.9 days).
Average snowfall
Letts, IN
The month with the highest snowfall is March (1.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Letts, IN
- Average snowfall days in January:
7.1 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
4.6 days - Average snowfall days in April:
0.8 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:
0.3 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
6.6 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Letts, IN
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - 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 3min
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 30min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
5h and 1min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 2min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 2min - Average sunshine in October:
6h and 5min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Letts, IN
- Average sunshine days in January:
17 days - Average sunshine days in February:
14.6 days - Average sunshine days in March:
13.9 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
13.2 days - Average sunshine days in June:
13.4 days
- Average sunshine days in July:
12.4 days - Average sunshine days in August:
15.4 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
18.7 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
16.2 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (12.4 days).
Average UV index
Letts, 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
Letts, IN
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Letts, IN
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Letts, Indiana, USA
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