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
Palmer, Illinois, starts September with an average high-temperature of a still warm 77.4°F (25.2°C), a minor shift from August's 82°F (27.8°C). Palmer's temperature lowers to a mean of 58.8°F (14.9°C) during the nights in September.Humidity
The average relative humidity in September is 75%.Rainfall
In September, the rain falls for 12.3 days. Throughout September, 2.17" (55mm) of precipitation is accumulated. Throughout the year, in Palmer, Illinois, there are 147.7 rainfall days, and 29.65" (753mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Palmer, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:41 pm CDT.
Sunshine
In Palmer, Illinois, the average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Act with care - The suggestion to avoid sunburn is emphasized. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What are September temperatures in Palmer?
What is the average humidity in September in Palmer?
How much does it rain in Palmer in September?
When it does not snow in Palmer?
What is the average length of the day in September in Palmer?
What time are sunrise and sunset in September in Palmer?
How long on average sun shines in September in Palmer?
How high is the UV index in September in Palmer?
Average temperature in September
Palmer, IL
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in September: 58.8°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Palmer, IL
- 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 (29.92"Hg).
Average wind speed in September
Palmer, IL
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Palmer, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Palmer, IL
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is April (3.58").
The driest months (with the least rainfall) are February and December (1.65").
Average rainfall days in September
Palmer, IL
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in September
Palmer, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Palmer, IL
- 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
Palmer, IL
- 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 24min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Palmer, IL
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is June (11 days).
Average UV index in September
Palmer, IL
- 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
Palmer, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are June, August and September (Cloud cover 30).
Average visibility in September
Palmer, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Palmer, Illinois, USA
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