Climate and monthly weather forecastDecatur, OH
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Decatur, Ohio, with temperature in the range of an average high of 36.9°F (2.7°C) and an average low of 24.1°F (-4.4°C). In Decatur, the lowest average temperatures are observed in January, with a high of 36.9°F (2.7°C) and a low of 24.1°F (-4.4°C). Weather in January »Weather in February
The last month of the winter, February, is another cold month in Decatur, Ohio, with temperature in the range of an average low of 27°F (-2.8°C) and an average high of 41.5°F (5.3°C). February's commencement is accompanied by an average high-temperature of a still wintry 41.5°F (5.3°C), diverging marginally from January's 36.9°F (2.7°C). Weather in February »Weather in March
March, the first month of the spring in Decatur, is a cool month, with an average temperature fluctuating between 35.4°F (1.9°C) and 52°F (11.1°C). Noticing a change, the average high-temperature during March moves from February's wintry 41.5°F (5.3°C) to a cool 52°F (11.1°C). Weather in March »Weather in April
April is a refreshing spring month in Decatur, Ohio, with an average temperature varying between 45.1°F (7.3°C) and 63.9°F (17.7°C). April brings a temperature increase, with average high-temperatures moving from March's cool 52°F (11.1°C) to a refreshing 63.9°F (17.7°C). Weather in April »Weather in May
The last month of the spring, May, is a warm month in Decatur, Ohio, with an average temperature varying between 55°F (12.8°C) and 73.8°F (23.2°C). An increase in the average high-temperature marks May, moving from April's refreshing 63.9°F (17.7°C) to a moderately hot 73.8°F (23.2°C). Weather in May »Weather in June
June, the first month of the summer in Decatur, is also a moderately hot month, with an average temperature varying between 61.3°F (16.3°C) and 81.3°F (27.4°C). The embrace of June brings a minor uplift in the average high-temperature, shifting from a warm 73.8°F (23.2°C) in May to a still moderately hot 81.3°F (27.4°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Decatur, Ohio, with temperature in the range of an average low of 64.8°F (18.2°C) and an average high of 84.6°F (29.2°C). July is the month when Decatur sees the highest average temperatures, with a high of 84.6°F (29.2°C) and a low of 64.8°F (18.2°C). For July, the heat index is appraised at a very hot 95°F (35°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Decatur, Ohio, with temperature in the range of an average high of 83.7°F (28.7°C) and an average low of 63.1°F (17.3°C). The average high-temperature for August is a still warm 83.7°F (28.7°C), closely aligning with the temperature of the preceding month. 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 57.9°F (14.4°C) and 77.5°F (25.3°C). The commencement of September indicates a gentle shift in the average high-temperature, receding from August's moderately hot 83.7°F (28.7°C) to a still warm 77.5°F (25.3°C). Weather in September »Weather in October
October, like September, in Decatur, Ohio, is another refreshing autumn month, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 64.9°F (18.3°C). Decatur observes a minor decrease in the average high-temperature with the arrival of October, falling from September's warm 77.5°F (25.3°C) to a comfortable 64.9°F (18.3°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Decatur, Ohio, with an average temperature varying between 36.5°F (2.5°C) and 51.8°F (11°C). In November, the meteorological conditions alter, with the average high-temperature shifting from a comfortable 64.9°F (18.3°C) in October to a cool 51.8°F (11°C). Weather in November »Weather in December
December, the first month of the winter in Decatur, is also a wintry month, with an average temperature ranging between min 31.1°F (-0.5°C) and max 42.1°F (5.6°C). In the transition to December, Decatur observes a drop in the average high-temperature, moving from a fresh 51.8°F (11°C) in November to a cold 42.1°F (5.6°C). Weather in December »Updated: Feb 13, 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
With an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 24.1°F (-4.4°C), January is the coldest month in Decatur, Ohio.
In Decatur, during the entire year, the rain falls for 171.5 days and collects up to 32.6" (828mm) of precipitation.
January through April, October through December are months with snowfall.
Throughout the year, there are 33.5 snowfall days, and 9.41" (239mm) of snow is accumulated.
The month with the least sunshine in Decatur is January, with an average of 4h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Decatur, Ohio.
February and December, with an average relative humidity of 81%, are most humid months in Decatur, Ohio.
February is the month with the most snowfall in Decatur, Ohio. Snow falls for 7.9 days and accumulates 2.4" (61mm) of snow.
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.
May is the month with the most rainfall in Decatur. Rain falls for 18.7 days and accumulates 3.43" (87mm) of precipitation.
May through September are months without snowfall.
June has the longest days of the year in Decatur, with an average of 14h and 48min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index in Decatur.
Decatur's temperature records reveal July as the warmest month, marked by average highs of 84.6°F (29.2°C) and lows of 64.8°F (18.2°C).
August through November, with an average relative humidity of 76%, are the least humid months in Decatur, Ohio.
The month with the most sunshine is August, with an average of 10.3h of sunshine.
The month with the least rainfall in Decatur, Ohio, is September, when the rain falls for 13.5 days and typically collects 1.81" (46mm) of precipitation.
The month with the shortest days in Decatur is December, with an average of 9h and 30min of daylight.
Average temperature
Decatur, OH
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (36.9°F).
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure
Decatur, OH
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.04"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.14"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Decatur, OH
- Average wind speed in January:
8.8mph - Average wind speed in February:
8.6mph - Average wind speed in March:
8.3mph - Average wind speed in April:
8.4mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.1mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5.2mph - Average wind speed in September:
5.7mph - Average wind speed in October:
7mph - Average wind speed in November:
7.5mph - Average wind speed in December:
8.1mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity
Decatur, OH
The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are August, September, October and November (76%).
Average rainfall
Decatur, OH
- Average rainfall in January:
2.13" - Average rainfall in February:
2.95" - Average rainfall in March:
3.19" - Average rainfall in April:
3.39" - Average rainfall in May:
3.43" - Average rainfall in June:
2.99"
- Average rainfall in July:
3.07" - Average rainfall in August:
2.28" - Average rainfall in September:
1.81" - Average rainfall in October:
2.17" - Average rainfall in November:
2.32" - Average rainfall in December:
2.87"
The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days
Decatur, OH
- Average rainfall days in January:
11.6 days - Average rainfall days in February:
12 days - Average rainfall days in March:
14.5 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
18.7 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
17.5 days - Average rainfall days in August:
14.5 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
12.3 days - Average rainfall days in November:
10.2 days - Average rainfall days in December:
13.1 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (10.2 days).
Average snowfall
Decatur, OH
The month with the highest snowfall is February (2.4").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Decatur, OH
- Average snowfall days in January:
9.8 days - Average snowfall days in February:
7.9 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:
0.2 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
7.6 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Decatur, OH
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
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 6min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 48min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 18min - Average sunshine in October:
6h and 30min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Decatur, OH
- Average sunshine days in January:
11.4 days - Average sunshine days in February:
10.8 days - Average sunshine days in March:
12.4 days - Average sunshine days in April:
11.7 days - Average sunshine days in May:
9.8 days - Average sunshine days in June:
9.8 days
- Average sunshine days in July:
10.5 days - Average sunshine days in August:
14.7 days - Average sunshine days in September:
14.7 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
17.4 days - Average sunshine days in December:
12.2 days
The month with the most sunshine days is October (17.5 days).
The months with the least sunshine days are May and June (9.8 days).
Average UV index
Decatur, OH
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, November and December (UV index 2).
Average cloud cover
Decatur, OH
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Decatur, OH
The months with the highest visibility are March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, May and July (5mi).
