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
September signifies a gentle decline in Saint Lucas's average high-temperature, easing from a moderately hot 77.5°F (25.3°C) in August to a pleasant 71.4°F (21.9°C). The low-temperature in Saint Lucas averages to a cool 52.9°F (11.6°C) during the nights of September.Humidity
In September, the average relative humidity is 80%.Rainfall
In Saint Lucas, during September, the rain falls for 12.1 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Saint Lucas, during the entire year, the rain falls for 146.5 days and collects up to 31.3" (795mm) of precipitation.Snowfall
In Saint Lucas, snow does not fall in June through September.Daylight
In Saint Lucas, the average length of the day in September is 12h and 29min.On the first day of September in Saint Lucas, sunrise is at 6:32 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:50 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In September, the average daily maximum UV index in Saint Lucas is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
What are the temperatures in Saint Lucas in September?
What is the average humidity in September in Saint Lucas?
How many days does it rain in September in Saint Lucas?
When it does not snow in Saint Lucas?
Does it snow in Saint Lucas in September?
How many hours of daylight does Saint Lucas have in September?
What time are sunrise and sunset in September in Saint Lucas?
How long on average sun shines in September in Saint Lucas?
What is the UV index reading in September in Saint Lucas?
Average temperature in September
Saint Lucas, IA
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in September
Saint Lucas, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Saint Lucas, IA
- Average wind speed in September: 8.2mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Saint Lucas, IA
- Average humidity in September: 80%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in September
Saint Lucas, IA
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is June (5.08").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in September
Saint Lucas, IA
- Average rainfall days in September: 12.1 days
The months with the highest number of rainy days are May and June (19.8 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Saint Lucas, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Saint Lucas, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint Lucas, IA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Saint Lucas, IA
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.9 days).
Average UV index in September
Saint Lucas, IA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Saint Lucas, IA
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Saint Lucas, IA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Saint Lucas, Iowa, USA
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