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
In September, the average high-temperature registers at a still moderately hot 73.8°F (23.2°C), nearly identical to August's 79°F (26.1°C). In Lynn, September is marked by an average low-temperature of 56.3°F (13.5°C).Humidity
The average relative humidity in September is 79%.Rainfall
In September, the rain falls for 14.5 days. Throughout September, 2.05" (52mm) of precipitation is accumulated. In Lynn, during the entire year, the rain falls for 169.7 days and collects up to 31.65" (804mm) of precipitation.Snowfall
In Lynn, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 7:08 am and sunset at 8:10 pm. On the last day of September, sunrise is at 7:35 am and sunset at 7:23 pm EDT.
Sunshine
In September, the average sunshine is 7.9h.UV index
In Lynn, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in Lynn in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September in Lynn?
Average temperature in September
Lynn, IN
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in September
Lynn, IN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Lynn, IN
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Lynn, IN
- Average humidity in September: 79%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Lynn, IN
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is May (3.86").
The driest month (with the least rainfall) is February (1.93").
Average rainfall days in September
Lynn, IN
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is May (19.9 days).
The months with the least rainy days are January and February (9 days).
Average snowfall in September
Lynn, IN
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.78").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Lynn, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lynn, IN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Lynn, IN
- Average sunshine days in September: 13 days
The month with the most sunshine days is November (16 days).
The month with the least sunshine days is May (8.7 days).
Average UV index in September
Lynn, IN
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Lynn, IN
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
Lynn, 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).
Lynn, Indiana, USA
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