Expand
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, is another subzero cold winter month in Decatur, Michigan, with an average temperature varying between 18.9°F (-7.3°C) and 28.9°F (-1.7°C). January is the coldest month, exhibiting average temperatures of 28.9°F (-1.7°C) at the peak and 18.9°F (-7.3°C) at the base. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Decatur, Michigan, with an average temperature varying between 32.4°F (0.2°C) and 21°F (-6.1°C). The onset of February notes an average high-temperature of a wintry 32.4°F (0.2°C), subtly shifted from January's 28.9°F (-1.7°C). Weather in February »
Weather in March
March, the first month of the spring in Decatur, is a chilly month, with an average temperature varying between 29.3°F (-1.5°C) and 43.5°F (6.4°C). As February gives way to March, the average high-temperature displays an increase, moving from an icy 32.4°F (0.2°C) to a frosty 43.5°F (6.4°C). Weather in March »
Weather in April
April is a fresh spring month in Decatur, Michigan, with an average temperature varying between 55.2°F (12.9°C) and 38.8°F (3.8°C). The arrival of April signals an increase in the average high-temperature, moving from a chilly 43.5°F (6.4°C) in March to a fresh 55.2°F (12.9°C). Weather in April »
Weather in May
May, the last month of the spring in Decatur, is an enjoyable month, with an average temperature ranging between min 49.8°F (9.9°C) and max 67.1°F (19.5°C). May's arrival brings a change in high-temperatures, moving from a fresh 55.2°F (12.9°C) in April to a refreshing 67.1°F (19.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Decatur, Michigan, with an average temperature varying between 58.5°F (14.7°C) and 75.7°F (24.3°C). The embrace of June brings a minor uplift in the average high-temperature, shifting from a comfortable 67.1°F (19.5°C) in May to a moderately hot 75.7°F (24.3°C). Weather in June »
Weather in July
July, like June, in Decatur, Michigan, is a moderately hot summer month, with an average temperature varying between 79.7°F (26.5°C) and 61.9°F (16.6°C). With average temperatures fluctuating between a high of 79.7°F (26.5°C) and a low of 61.9°F (16.6°C), July stands out as the warmest month. Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Decatur, Michigan, with an average temperature varying between 60.6°F (15.9°C) and 78.4°F (25.8°C). The average high-temperature during August registers at a still moderately hot 78.4°F (25.8°C), maintaining a close resemblance to the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Decatur, Michigan, with an average temperature ranging between max 72.7°F (22.6°C) and min 54.5°F (12.5°C). With the arrival of September, Decatur notices a mild change in the average high-temperature, sliding from August's warm 78.4°F (25.8°C) to an agreeable 72.7°F (22.6°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Decatur, Michigan, with an average temperature varying between 45°F (7.2°C) and 59.5°F (15.3°C). During the transition into October, Decatur observes a decrease in the average high-temperature, falling from an agreeable 72.7°F (22.6°C) in September to a refreshing 59.5°F (15.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Decatur, is also a frosty month, with an average temperature ranging between min 34°F (1.1°C) and max 45.9°F (7.7°C). Onset of November witnesses a reduction in the average high-temperature, falling from a refreshing 59.5°F (15.3°C) in October to a frosty 45.9°F (7.7°C). Weather in November »
Weather in December
December, the first month of the winter in Decatur, is also a wintry month, with temperature in the range of an average low of 26.4°F (-3.1°C) and an average high of 35.2°F (1.8°C). The arrival of December corresponds with a shift in temperature, down from a chilly 45.9°F (7.7°C) in November to a cold 35.2°F (1.8°C). Weather in December »
Updated: Jul 14, 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 time of the year is the coldest?
January is the month that records the lowest temperatures, with averages ranging from a high of 28.9°F (-1.7°C) to a low of 18.9°F (-7.3°C).
What is the most humid month?
With an average relative humidity of 87%, January is the most humid month in Decatur.
How much does it rain?
Throughout the year, there are 139.4 rainfall days, and 20" (508mm) of precipitation is accumulated.
When does it snow?
January through May, October through December are months with snowfall.
When does it snow the most in Decatur?
The month with the most snowfall is January, when snow falls for 17.6 days and typically aggregates up to 4.29" (109mm) of snow.
How much does it snow?
In Decatur, during the entire year, snow falls for 63 days and aggregates up to 14.45" (367mm) of snow.
What is the month with the least sunshine in Decatur?
The month with the least sunshine is January, with an average of 2.6h of sunshine.
What is the month with the lowest UV index?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the driest month?
February is the month with the least rainfall. Rain falls for 4.8 days and accumulates 0.98" (25mm) of precipitation.
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 least humid month?
The months with the lowest humidity are April and October, with an average relative humidity of 77%.
What is the rainiest month?
June is the month with the most rainfall. Rain falls for 14.1 days and accumulates 2.6" (66mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 12min of daylight.
What is the month with the highest UV index?
June and August, with an average maximum UV index of 6, are months with the highest UV index.
What is the hottest time of year?
July, characterized by an average high temperature of 79.7°F (26.5°C) and a low temperature of 61.9°F (16.6°C), is generally the warmest month.
What month has the most sunshine?
July has the most sunshine of the year in Decatur, with an average of 10.2h of sunshine.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Decatur, MI
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.9°F).
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Decatur, MI
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.08"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"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.08"Hg
The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Decatur, MI
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.2mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity
Decatur, MI
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall
Decatur, MI
- Average rainfall in January:
1.3" - Average rainfall in February:
0.98" - Average rainfall in March:
1.02" - Average rainfall in April:
1.97" - Average rainfall in May:
2.48" - Average rainfall in June:
2.6"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.65" - Average rainfall in September:
1.57" - Average rainfall in October:
2.32" - Average rainfall in November:
1.14" - Average rainfall in December:
1.06"
The wettest month (with the highest rainfall) is June (2.6").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days
Decatur, MI
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
4.8 days - Average rainfall days in March:
10.5 days - Average rainfall days in April:
14.4 days - Average rainfall days in May:
15.4 days - Average rainfall days in June:
14.1 days
- Average rainfall days in July:
14.8 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
12.8 days - Average rainfall days in October:
15.3 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is February (4.8 days).
Average snowfall
Decatur, MI
- Average snowfall in January:
4.29" - Average snowfall in February:
2.91" - Average snowfall in March:
1.69" - Average snowfall in April:
0.91" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Decatur, MI
- Average snowfall days in January:
17.6 days - Average snowfall days in February:
13.8 days - Average snowfall days in March:
7 days - Average snowfall days in April:
2.6 days - Average snowfall days in May:
0.2 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:
0.5 days - Average snowfall days in November:
6.9 days - Average snowfall days in December:
14.4 days
The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Decatur, MI
- Average daylight in January:
9h and 3min - 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 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
2h and 4min - Average sunshine in February:
3h and 4min - Average sunshine in March:
5h and 3min - Average sunshine in April:
6h and 3min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
9h and 3min - Average sunshine in September:
8h and 1min - Average sunshine in October:
5h and 4min - Average sunshine in November:
4h and 1min - Average sunshine in December:
3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days
Decatur, MI
- Average sunshine days in January:
9.8 days - Average sunshine days in February:
10.3 days - Average sunshine days in March:
14.4 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
12.7 days - Average sunshine days in June:
13.2 days
- Average sunshine days in July:
13.3 days - Average sunshine days in August:
13.7 days - Average sunshine days in September:
14.3 days - Average sunshine days in October:
13.2 days - Average sunshine days in November:
13.9 days - Average sunshine days in December:
11.2 days
The month with the most sunshine days is March (14.4 days).
The month with the least sunshine days is January (9.8 days).
Average UV index
Decatur, MI
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Decatur, MI
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility
Decatur, MI
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Decatur, Michigan, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location