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
With the onset of September, the average high-temperature subtly recedes from August's tropical 86.5°F (30.3°C) to a warm 79.7°F (26.5°C). During September, Salem experiences a consistent low-temperature average of 58.6°F (14.8°C).Humidity
In Salem, the average relative humidity in September is 75%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.8 days and typically collects 1.93" (49mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Salem, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:34 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:50 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 5 in September transforms into the following instructions:
Undertake precautions - Guarding against sun damage is counselled. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Salem in September?
What is the average humidity in September in Salem?
What is the driest month?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September in Salem?
What time are sunrise and sunset in September?
How long on average sun shines in September in Salem?
What is the UV index intensity in September?
Average temperature in September
Salem, MO
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in September
Salem, MO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Salem, MO
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in September
Salem, MO
- Average humidity in September: 75%
The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Salem, MO
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Salem, MO
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Salem, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.25").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Salem, MO
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Salem, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Salem, MO
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in September
Salem, MO
- Average UV index in September: 5
The months with the highest UV index are May, 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
Salem, MO
- Average cloud cover in September: 33
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Salem, MO
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are January, May, July, August and September (5mi).
Salem, Missouri, USA
Weather forecast for your location
2. Allow the app to use your location