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
September brings a slight decrease in the average high-temperature, shifting from a warm 84°F (28.9°C) in August to a still moderately hot 78.1°F (25.6°C). In the month of September, Surprise's average low-temperature falls to a refreshing 58.6°F (14.8°C).Humidity
In September, the average relative humidity in Surprise is 76%.Rainfall
September is the month with the least rainfall in Surprise. Rain falls for 13 days and accumulates 1.57" (40mm) of precipitation.Snowfall
In Surprise, snow does not fall in May through September.Daylight
In Surprise, the average length of the day in September is 12h and 26min.On the first day of September in Surprise, sunrise is at 7:13 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 7:27 pm EDT.
Sunshine
In Surprise, the average sunshine in September is 8.2h.UV index
In Surprise, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 5 during September leads to these instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Surprise?
What is the average humidity in September in Surprise?
What is the driest month in Surprise?
How many days does it rain in September in Surprise?
When it does not snow in Surprise?
Does it snow in Surprise in September?
What is the average length of the day in September in Surprise?
When are sunrise and sunset in September in Surprise?
How many hours of sunshine does Surprise have in September?
How high is the UV index in September in Surprise?
Average temperature in September
Surprise, IN
- Average high temperature in September: 78.1°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).
Average pressure in September
Surprise, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Surprise, IN
- Average wind speed in September: 5.5mph
The windiest months (with the highest average wind speed) are January, February and April (8mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in September
Surprise, IN
- Average humidity in September: 76%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Surprise, IN
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is April (3.43").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
Surprise, IN
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (9 days).
Average snowfall in September
Surprise, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.36").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Surprise, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.8 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
Surprise, IN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in September
Surprise, IN
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is October (18.3 days).
The month with the least sunshine days is May (10.6 days).
Average UV index in September
Surprise, IN
- Average UV index in September: 5
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 in September
Surprise, IN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Surprise, IN
- Average visibility in September: 5mi
The months with the highest visibility are March, April, June, October and November (6mi).
The months with the lowest visibility are January, February, May, July, August, September and December (5mi).
Surprise, Indiana, USA
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