September weather forecastHammond, IN
September
Weather in September
September marks the transition from summer to fall in Hammond. This month sees a cool down in temperature, although the amount of daylight hours remains adequately high. Lush scenery ensues as rainfall at 2.05" (52mm) continues to drench the city over 13 days. There's also a rise in wind speed from August, adding to the climate change towards autumn.Temperature
With September's onset, the weather in Hammond reveals a slight temperature decrease, transitioning from a warm 79.7°F (26.5°C) in August to a still moderately hot 73.6°F (23.1°C). Throughout September, an average nighttime temperature of 59°F (15°C) is experienced in Hammond.Humidity
In September, the average relative humidity is 75%.Rainfall
In Hammond, during September, the rain falls for 13 days and regularly aggregates up to 2.05" (52mm) of precipitation. Throughout the year, in Hammond, there are 150.7 rainfall days, and 25.31" (643mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Hammond.Daylight
In Hammond, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:22 pm. On the last day of September, in Hammond, Indiana, sunrise is at 6:46 am and sunset at 6:32 pm CDT.
Sunshine
The average sunshine in September in Hammond, Indiana, is 8.7h.UV index
The average daily maximum UV index in September in Hammond, Indiana, is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Adopt protective measures - It is advised to guard against sun damage. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hammond, IN
- Average high temperature in September: 73.6°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 59°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 (19°F).
Average pressure in September
Hammond, 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
Hammond, IN
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Hammond, IN
- Average humidity in September: 75%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Hammond, IN
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in September
Hammond, IN
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in September
Hammond, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Hammond, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.5 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
Hammond, 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 42min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Hammond, IN
- Average sunshine days in September: 14 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is July (9.9 days).
Average UV index in September
Hammond, IN
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Hammond, IN
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Hammond, IN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
