September weather forecastCape Girardeau, MO
September
Weather in September
September marks an endearing transition from balmy summer to refreshing autumn. With the decrease in temperature to highs of 81.1°F (27.3°C) and lows of 61.3°F (16.3°C), the city start experiencing cooler nights and warm days. Leaves turn russet and gold, blanketing the streets in a sea of warm hues. Outdoor activities continue unabated in the mild weather, with fall-themed events and festivals becoming focal points. The beauty of Cape Girardeau in September is truly worth witnessing.Temperature
September's arrival in Cape Girardeau, Missouri, brings an average high-temperature of a warm 81.1°F (27.3°C), slightly deviating from August's 86.2°F (30.1°C). In Cape Girardeau, an average temperature of 61.3°F (16.3°C) is noted during September nights.Heat index
September's heat index is appraised at a tropical 86°F (30°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.It is crucial to understand that heat index figures are for shade and gentle wind conditions. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
In Cape Girardeau, Missouri, the average relative humidity in September is 73%.Rainfall
The month with the least rainfall in Cape Girardeau is September, when the rain falls for 11.4 days and typically collects 1.5" (38mm) of precipitation.Snowfall
In Cape Girardeau, Missouri, snow does not fall in May through September.Daylight
In Cape Girardeau, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:29 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:42 pm CDT.
Sunshine
In September, the average sunshine in Cape Girardeau is 9.7h.UV index
In Cape Girardeau, Missouri, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cape Girardeau, MO
- Average high temperature in September: 81.1°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (41°F).
- Average low temperature in September: 61.3°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).
Average pressure in September
Cape Girardeau, 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 (29.94"Hg).
Average wind speed in September
Cape Girardeau, MO
- Average wind speed in September: 6.2mph
The windiest months (with the highest average wind speed) are January and February (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Cape Girardeau, MO
- Average humidity in September: 73%
The months with the highest relative humidity are March and May (78%).
The month with the lowest relative humidity is October (69%).
Average rainfall in September
Cape Girardeau, MO
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is April (4.33").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in September
Cape Girardeau, MO
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (9.8 days).
Average snowfall in September
Cape Girardeau, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Cape Girardeau, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.7 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
Cape Girardeau, MO
- Average daylight in September: 12h and 24min
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 42min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Cape Girardeau, MO
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is July (11.9 days).
Average UV index in September
Cape Girardeau, 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 and December (UV index 2).
Average cloud cover in September
Cape Girardeau, MO
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are June, August and September (Cloud cover 27).
Average visibility in September
Cape Girardeau, MO
- 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).
