Climate and monthly weather forecastDecatur, MS
Climate and monthly weather forecast
Weather in January
January, like December, in Decatur, Mississippi, is another fresh winter month, with an average temperature ranging between min 37.8°F (3.2°C) and max 54.5°F (12.5°C). January is the coldest month, with an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 37.8°F (3.2°C). Weather in January »Weather in February
The last month of the winter, February, is a refreshing month in Decatur, Mississippi, with an average temperature varying between 59.2°F (15.1°C) and 42.1°F (5.6°C). The transition from January to February sees an average high-temperature of a moderate 59.2°F (15.1°C), indicating a minor variance from the prior month. Weather in February »Weather in March
March, the first month of the spring in Decatur, is a comfortable month, with an average temperature varying between 67.1°F (19.5°C) and 48.4°F (9.1°C). A soft shift in the average high-temperature is noticeable in March, transitioning from 59.2°F (15.1°C) in February to a still refreshing 67.1°F (19.5°C). Weather in March »Weather in April
April is a warm spring month in Decatur, Mississippi, with an average temperature ranging between min 54.7°F (12.6°C) and max 76.1°F (24.5°C). With the onset of April, Decatur sees a temperature rise, with the average high-temperature moving from March's refreshing 67.1°F (19.5°C) to a warm 76.1°F (24.5°C). Weather in April »Weather in May
The last month of the spring, May, is another warm month in Decatur, Mississippi, with temperature in the range of an average high of 83.5°F (28.6°C) and an average low of 62.2°F (16.8°C). The start of May is characterized by a subtle increase in the average high-temperature, transitioning from 76.1°F (24.5°C) in April to a still warm 83.5°F (28.6°C). Weather in May »Weather in June
June, the first month of the summer in Decatur, is a hot month, with an average temperature fluctuating between 90.5°F (32.5°C) and 69.8°F (21°C). June's onset witnesses a minor shift in the average high-temperature, moving from a warm 83.5°F (28.6°C) in May to a hot 90.5°F (32.5°C). Weather in June »Weather in July
July, like June, is a hot summer month in Decatur, Mississippi, with temperature in the range of an average low of 71.4°F (21.9°C) and an average high of 91.4°F (33°C). Decatur reaches its highest average temperatures in July, measuring 91.4°F (33°C) at the peak and 71.4°F (21.9°C) at the lowest. For most parts of July, the heat index is computed to be a burning hot 114.8°F (46°C). Weather in July »Weather in August
The last month of the summer, August, is another tropical month in Decatur, Mississippi, with an average temperature fluctuating between 71.8°F (22.1°C) and 91.2°F (32.9°C). August's onset records a minor alteration in the average high-temperature to a still hot 91.2°F (32.9°C) from July's 91.4°F (33°C). Weather in August »Weather in September
The first month of the autumn, September, is also a hot month in Decatur, Mississippi, with an average temperature varying between 66.9°F (19.4°C) and 86.7°F (30.4°C). The start of September sees the average high-temperature at a still hot 86.7°F (30.4°C), showing little difference from August's 91.2°F (32.9°C). Weather in September »Weather in October
October, the same as September, is a moderately hot autumn month in Decatur, Mississippi, with an average temperature fluctuating between 56.3°F (13.5°C) and 76.8°F (24.9°C). The start of October comes with a reduction in the average high-temperature, receding from a hot 86.7°F (30.4°C) in September to a warm 76.8°F (24.9°C). Weather in October »Weather in November
November, the last month of the autumn in Decatur, is another comfortable month, with temperature in the range of an average low of 45.5°F (7.5°C) and an average high of 64.4°F (18°C). The arrival of November corresponds with a shift in temperature, down from a moderately hot 76.8°F (24.9°C) in October to an enjoyable 64.4°F (18°C). Weather in November »Weather in December
December, the first month of the winter in Decatur, is still a refreshing month, with an average temperature fluctuating between 57.2°F (14°C) and 41.9°F (5.5°C). Decatur in December undergoes a slight reduction in the average high-temperature, shifting from November's refreshing 64.4°F (18°C) to a moderate 57.2°F (14°C). Weather in December »Updated: Jun 12, 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 experiences its lowest temperatures in January, with an average peak of 54.5°F (12.5°C) and a low of 37.8°F (3.2°C).
Throughout the year, there are 167.6 rainfall days, and 36.54" (928mm) of precipitation is accumulated.
January through March and December are months with snowfall.
The month with the most snowfall is January, when snow falls for 0.8 days and typically aggregates up to 0.43" (11mm) of snow.
Throughout the year, there are 1.8 snowfall days, and 1.02" (26mm) of snow is accumulated.
The months with the lowest UV index are January and December, with an average maximum UV index of 3.
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.
April through November are months without snowfall in Decatur.
The month with the longest days in Decatur, Mississippi, is June, with an average of 14h and 12min of daylight.
With an average of 10.5h of sunshine, June has the most sunshine of the year in Decatur, Mississippi.
June and July, with an average maximum UV index of 7, are months with the highest UV index.
July stands out as Decatur's warmest month, with an average high-temperature of 91.4°F (33°C) and a low-temperature of 71.4°F (21.9°C).
October is the least humid month, with an average relative humidity of 70%.
November is the month with the least rainfall. Rain falls for 8.9 days and accumulates 2.09" (53mm) of precipitation.
December is the most humid month, with an average relative humidity of 81%.
The month with the most rainfall is December, when the rain falls for 13.3 days and typically aggregates up to 3.7" (94mm) of precipitation.
The month with the shortest days is December, with an average of 10h and 6min of daylight.
With an average of 4.9h of sunshine, December has the least sunshine of the year.
Average temperature
Decatur, MS
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (54.5°F).
The month with the highest average low temperature is August (71.8°F).
The coldest month (with the lowest average low temperature) is January (37.8°F).
Average pressure
Decatur, MS
- Average pressure in January:
30.17"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.96"Hg
- Average pressure in July:
29.99"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed
Decatur, MS
- Average wind speed in January:
7.7mph - Average wind speed in February:
7.8mph - Average wind speed in March:
7.6mph - Average wind speed in April:
7.6mph - Average wind speed in May:
6.1mph - Average wind speed in June:
5.2mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.8mph - Average wind speed in September:
5.2mph - Average wind speed in October:
6.3mph - Average wind speed in November:
7mph - Average wind speed in December:
7.4mph
The windiest month (with the highest average wind speed) is February (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity
Decatur, MS
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Decatur, MS
- Average rainfall in January:
3.39" - Average rainfall in February:
3.27" - Average rainfall in March:
3.31" - Average rainfall in April:
3.31" - Average rainfall in May:
2.6" - Average rainfall in June:
2.95"
The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is November (2.09").
Average rainfall days
Decatur, MS
- Average rainfall days in January:
11.9 days - Average rainfall days in February:
13.9 days - Average rainfall days in March:
14.3 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
13.6 days - Average rainfall days in June:
16.4 days
- Average rainfall days in July:
20.3 days - Average rainfall days in August:
19.1 days - Average rainfall days in September:
13.6 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
13.3 days
The month with the highest number of rainy days is July (20.3 days).
The month with the least rainy days is November (8.9 days).
Average snowfall
Decatur, MS
The month with the highest snowfall is January (0.43").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days
Decatur, MS
- Average snowfall days in January:
0.8 days - Average snowfall days in February:
0.5 days - Average snowfall days in March:
0.2 days - Average snowfall days in April:
0 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:
0 days - Average snowfall days in December:
0.3 days
The month with the highest number of snowfall days is January (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight / Average sunshine
Decatur, MS
- Average daylight in January:
10h and 18min - Average daylight in February:
11h and 6min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 48min - Average daylight in June:
14h and 12min
- Average daylight in July:
14h and 0min - Average daylight in August:
13h and 18min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 24min - Average daylight in November:
10h and 30min - Average daylight in December:
10h and 6min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in January:
5h and 18min - Average sunshine in February:
5h and 0min - Average sunshine in March:
6h and 42min - Average sunshine in April:
9h and 24min - Average sunshine in May:
9h and 48min - Average sunshine in June:
10h and 30min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 18min - Average sunshine in September:
9h and 18min - Average sunshine in October:
7h and 6min - Average sunshine in November:
6h and 6min - Average sunshine in December:
4h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days
Decatur, MS
- Average sunshine days in January:
17.3 days - Average sunshine days in February:
12.4 days - Average sunshine days in March:
15.2 days - Average sunshine days in April:
15.4 days - Average sunshine days in May:
15.8 days - Average sunshine days in June:
10.9 days
- Average sunshine days in July:
9 days - Average sunshine days in August:
10 days - Average sunshine days in September:
14.6 days - Average sunshine days in October:
20.2 days - Average sunshine days in November:
19.3 days - Average sunshine days in December:
15.5 days
The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is July (9 days).
Average UV index
Decatur, MS
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover
Decatur, MS
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility
Decatur, MS
The months with the highest visibility are January, February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are May, July and August (5mi).
