Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The transition from August to September brings an average high-temperature of a still moderately hot 73.4°F (23°C), barely different from August's 78.4°F (25.8°C). An average nighttime temperature of 55.2°F (12.9°C) is noted during the month of September.Humidity
In September, the average relative humidity in Donaldson is 80%.Rainfall
In Donaldson, in September, during 13.1 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Donaldson, during the entire year, the rain falls for 150.8 days and collects up to 19.21" (488mm) of precipitation.Snowfall
In Donaldson, snow does not fall in June through September.Daylight
In September, the average length of the day in Donaldson is 12h and 28min.On the first day of the month, sunrise is at 7:12 am and sunset at 8:18 pm. On the last day of September, sunrise is at 7:42 am and sunset at 7:28 pm EDT.
Sunshine
In Donaldson, the average sunshine in September is 8.1h.UV index
In September, the average daily maximum UV index in Donaldson is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 4 in September translates into this advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. When the Sun is at its strongest around midday, find shade and limit exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What is the usual temperature for Donaldson in September?
What is the average humidity in September in Donaldson?
How many days does it rain in September in Donaldson?
When it does not snow in Donaldson?
Does it snow in Donaldson in September?
What is the average length of the day in September in Donaldson?
What time are sunrise and sunset in September in Donaldson?
How long on average sun shines in September in Donaldson?
What is the UV index intensity in September in Donaldson?
Average temperature in September
Donaldson, IN
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Donaldson, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Donaldson, IN
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Donaldson, IN
- Average humidity in September: 80%
The months with the highest relative humidity are January, February and July (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Donaldson, IN
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in September
Donaldson, IN
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in September
Donaldson, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Donaldson, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Donaldson, IN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 1min
The months with the most sunshine are June and July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Donaldson, IN
- Average sunshine days in September: 14.8 days
The months with the most sunshine days are October and November (15.3 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in September
Donaldson, IN
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Donaldson, IN
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Donaldson, IN
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Donaldson, Indiana, USA
Weather forecast for your location
2. Allow the app to use your location
