Climate and monthly weather forecastDecatur, AR
Climate and monthly weather forecast
Weather in January
January, like December, is another chilly winter month in Decatur, Arkansas, with an average temperature ranging between min 28.4°F (-2°C) and max 44.4°F (6.9°C). January is the month when Decatur experiences its coldest temperatures, averaging a high of 44.4°F (6.9°C) and a low of 28.4°F (-2°C). Weather in January »Weather in February
February, the last month of the winter in Decatur, is another chilly month, with temperature in the range of an average low of 32°F (0°C) and an average high of 48.6°F (9.2°C). Decatur, Arkansas, records an average high-temperature of a still frosty 48.6°F (9.2°C) in February, closely mirroring the climate of the previous month. Weather in February »Weather in March
The first month of the spring, March, is a refreshing month in Decatur, Arkansas, with an average temperature fluctuating between 41°F (5°C) and 59°F (15°C). March's arrival sees a rise in the average high-temperature, jumping from February's frosty 48.6°F (9.2°C) to a mild 59°F (15°C). Weather in March »Weather in April
April is a pleasant spring month in Decatur, Arkansas, with an average temperature fluctuating between 68.4°F (20.2°C) and 49.1°F (9.5°C). April's arrival coincides with a temperature rise, moving from March's refreshing 59°F (15°C) to an agreeable 68.4°F (20.2°C). Weather in April »Weather in May
The last month of the spring, May, is a moderately hot month in Decatur, Arkansas, with an average temperature fluctuating between 57.6°F (14.2°C) and 76.6°F (24.8°C). The arrival of May brings a soft temperature shift, with the average high-temperature nudging from an agreeable 68.4°F (20.2°C) in April to a moderately hot 76.6°F (24.8°C). Weather in May »Weather in June
The first month of the summer, June, is a hot month in Decatur, Arkansas, with temperature in the range of an average low of 66.9°F (19.4°C) and an average high of 87.3°F (30.7°C). The arrival of June sees a shift in the average high-temperature, moving from a warm 76.6°F (24.8°C) in May to a tropical 87.3°F (30.7°C). Weather in June »Weather in July
July, like June, is another hot summer month in Decatur, Arkansas, with an average temperature ranging between min 69.6°F (20.9°C) and max 90.5°F (32.5°C). July, marked by an average high-temperature of 90.5°F (32.5°C) and a low-temperature of 69.6°F (20.9°C), is the warmest month. July's average heat index is evaluated at an extremely hot 107.6°F (42°C). Weather in July »Weather in August
August, the last month of the summer in Decatur, is another tropical month, with an average temperature fluctuating between 88.9°F (31.6°C) and 68.2°F (20.1°C). The beginning of August records an average high-temperature of a still hot 88.9°F (31.6°C), marking a negligible difference from July's 90.5°F (32.5°C). Weather in August »Weather in September
September, the first month of the autumn in Decatur, is also a moderately hot month, with an average temperature fluctuating between 81.7°F (27.6°C) and 61.5°F (16.4°C). The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a tropical 88.9°F (31.6°C) in August to a moderately hot 81.7°F (27.6°C). Weather in September »Weather in October
October, the same as September, in Decatur, Arkansas, is an agreeable autumn month, with an average temperature varying between 49.8°F (9.9°C) and 68.9°F (20.5°C). The move into October indicates a reduction in the average high-temperature, down from September's warm 81.7°F (27.6°C) to an agreeable 68.9°F (20.5°C). Weather in October »Weather in November
November, the last month of the autumn in Decatur, is also a moderate month, with an average temperature varying between 57°F (13.9°C) and 39.9°F (4.4°C). During Decatur's transition into November, the average high-temperature lessens, moving from a pleasant 68.9°F (20.5°C) in October to a mild 57°F (13.9°C). Weather in November »Weather in December
The first month of the winter, December, is also a frosty month in Decatur, Arkansas, with an average temperature fluctuating between 32°F (0°C) and 46.6°F (8.1°C). December brings a drop in Decatur's average high-temperature, falling from a moderate 57°F (13.9°C) in November to a frosty 46.6°F (8.1°C). Weather in December »Updated: Jul 23, 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
Decatur records the coldest temperatures in January, averaging a high of 44.4°F (6.9°C) and a low of 28.4°F (-2°C).
Throughout the year, there are 139.7 rainfall days, and 31.02" (788mm) of precipitation is accumulated.
January through May, November and December are months with snowfall.
Throughout the year, there are 13.9 snowfall days, and 4.8" (122mm) of snow is accumulated.
January and December, with an average of 5.4h of sunshine, are months with the least sunshine.
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Decatur.
February is the month with the least rainfall. Rain falls for 9.5 days and accumulates 1.89" (48mm) of precipitation.
The month with the most snowfall is February, when snow falls for 4.7 days and typically aggregates up to 1.46" (37mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
With an average relative humidity of 77%, May is the most humid month in Decatur.
The month with the most rainfall is May, when the rain falls for 15.5 days and typically aggregates up to 4.37" (111mm) of precipitation.
June through October are months without snowfall.
With an average of 14h and 36min of daylight, June has the longest days of the year.
July stands out as Decatur's warmest month, with an average high-temperature of 90.5°F (32.5°C) and a low-temperature of 69.6°F (20.9°C).
With an average of 10.8h of sunshine, July has the most sunshine of the year.
The month with the highest UV index is July, with an average maximum UV index of 7.
October is the least humid month, with an average relative humidity of 70%.
December has the shortest days of the year, with an average of 9h and 42min of daylight.
Average temperature
Decatur, AR
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (44.4°F).
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure
Decatur, AR
- Average pressure in January:
30.17"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are April and June (29.93"Hg).
Average wind speed
Decatur, AR
- Average wind speed in January:
9.1mph - Average wind speed in February:
9.4mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.9mph - Average wind speed in June:
8mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.3mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.3mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity
Decatur, AR
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Decatur, AR
- Average rainfall in January:
2.36" - Average rainfall in February:
1.89" - Average rainfall in March:
3.19" - Average rainfall in April:
3.39" - Average rainfall in May:
4.37" - Average rainfall in June:
2.24"
- Average rainfall in July:
2.32" - Average rainfall in August:
2.48" - Average rainfall in September:
2.09" - Average rainfall in October:
2.72" - Average rainfall in November:
1.93" - Average rainfall in December:
2.05"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is February (1.89").
Average rainfall days
Decatur, AR
- Average rainfall days in January:
8.5 days - Average rainfall days in February:
9.5 days - Average rainfall days in March:
14.2 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
15.5 days - Average rainfall days in June:
12.8 days
- Average rainfall days in July:
13.2 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
10.6 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
8.7 days
The month with the highest number of rainy days is May (15.5 days).
The months with the least rainy days are January and November (8.5 days).
Average snowfall
Decatur, AR
- Average snowfall in January:
1.3" - Average snowfall in February:
1.46" - Average snowfall in March:
1.06" - Average snowfall in April:
0.04" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Decatur, AR
- Average snowfall days in January:
3.4 days - Average snowfall days in February:
4.7 days - Average snowfall days in March:
1.7 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0.3 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:
0.1 days - Average snowfall days in November:
0.8 days - Average snowfall days in December:
2.6 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Decatur, AR
- Average daylight in January:
10h and 0min - Average daylight in February:
10h and 54min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 6min - Average daylight in June:
14h and 36min
- Average daylight in July:
14h and 18min - Average daylight in August:
13h and 30min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 12min - Average daylight in December:
9h and 42min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
5h and 24min - Average sunshine in February:
5h and 42min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 54min - Average sunshine in June:
10h and 30min
- Average sunshine in July:
10h and 48min - Average sunshine in August:
10h and 42min - Average sunshine in September:
9h and 18min - Average sunshine in October:
6h and 6min - Average sunshine in November:
5h and 42min - Average sunshine in December:
5h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days
Decatur, AR
- Average sunshine days in January:
19 days - Average sunshine days in February:
14 days - Average sunshine days in March:
13.3 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
14.5 days - Average sunshine days in June:
15.4 days
- Average sunshine days in July:
16.3 days - Average sunshine days in August:
17.2 days - Average sunshine days in September:
17.8 days - Average sunshine days in October:
19.1 days - Average sunshine days in November:
19 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is December (19.2 days).
The months with the least sunshine days are March and April (13.3 days).
Average UV index
Decatur, AR
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover
Decatur, AR
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility
Decatur, AR
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
