September weather forecastValparaiso, IN
September
Weather in September
September ushers in the onset of fall in Valparaiso, bringing cooler temperatures and shorter daylight hours. The noticeable reductions in temperature from August's high heat levels make it a period of change. The sparse rainfall of 1.26" (32mm) reduces the humidity, influencing the city venue's overall landscape. As the month progresses, fall colors become more evident, providing scenic views at every turn. As September transitions into October, the weather further cools, and the characteristics of fall become more pronounced.Temperature
Valparaiso registers an average high-temperature of a still warm 73.4°F (23°C) at the commencement of September, closely related to the preceding month. An average low-temperature of 56.8°F (13.8°C) is recorded in the month of September.Humidity
The average relative humidity in September is 79%.Rainfall
In Valparaiso, Indiana, in September, it is raining for 11.9 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, there are 133.4 rainfall days, and 19.09" (485mm) of precipitation is accumulated.Snowfall
In Valparaiso, snow does not fall in June through September.Daylight
In Valparaiso, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:15 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:44 am and sunset at 6:31 pm CDT.
Sunshine
The average sunshine in September in Valparaiso is 8.4h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Valparaiso, IN
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Valparaiso, 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
Valparaiso, IN
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in September
Valparaiso, IN
- Average humidity in September: 79%
The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Valparaiso, IN
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is February (0.87").
Average rainfall days in September
Valparaiso, IN
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in September
Valparaiso, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.48").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Valparaiso, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Valparaiso, IN
- Average daylight in September: 12h and 30min
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 24min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Valparaiso, IN
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in September
Valparaiso, IN
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Valparaiso, IN
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Valparaiso, IN
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
