September weather forecastCrystal Lakes, MO
September
Weather in September
September, the first month of the autumn in Crystal Lakes, is also a moderately hot month, with an average temperature fluctuating between 77.7°F (25.4°C) and 58.8°F (14.9°C).Temperature
With September's onset, the weather reveals a slight temperature decrease, transitioning from 83.7°F (28.7°C) in August to a still moderately hot 77.7°F (25.4°C). During the month of September, an average low-temperature of 58.8°F (14.9°C) is recorded.Humidity
In September, the average relative humidity in Crystal Lakes is 76%.Rainfall
In September, the rain falls for 12.4 days. Throughout September, 2.52" (64mm) of precipitation is accumulated. In Crystal Lakes, during the entire year, the rain falls for 138.2 days and collects up to 27.72" (704mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:45 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:00 pm CDT.
Sunshine
In Crystal Lakes, the average sunshine in September is 9.3h.UV index
In Crystal Lakes, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Crystal Lakes, MO
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in September: 58.8°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Crystal Lakes, MO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Crystal Lakes, MO
- Average wind speed in September: 7mph
The windiest months (with the highest average wind speed) are March and April (9.8mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Crystal Lakes, MO
- Average humidity in September: 76%
The months with the highest relative humidity are May and June (80%).
The months with the lowest relative humidity are October and November (71%).
Average rainfall in September
Crystal Lakes, MO
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is January (1.02").
Average rainfall days in September
Crystal Lakes, MO
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in September
Crystal Lakes, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.07").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Crystal Lakes, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Crystal Lakes, MO
- Average daylight in September: 12h and 24min
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 18min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Crystal Lakes, MO
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is December (21 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Crystal Lakes, 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
Crystal Lakes, MO
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Crystal Lakes, 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).
