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 reveals a small adjustment in temperature, transitioning from an average high of a warm 78.4°F (25.8°C) in August to an agreeable 72.9°F (22.7°C). Readlyn's temperature tends to fall to an average low of 54°F (12.2°C) during the nights of September.Humidity
In September, the average relative humidity in Readlyn is 78%.Rainfall
In Readlyn, in September, it is raining for 11.5 days, with typically 2.36" (60mm) of accumulated precipitation. In Readlyn, during the entire year, the rain falls for 132 days and collects up to 27.28" (693mm) of precipitation.Snowfall
In Readlyn, snow does not fall in June through September.Daylight
The average length of the day in September in Readlyn is 12h and 29min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:42 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:51 pm CDT.
Sunshine
The average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 4 during September translates into the following guidance:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
What is the usual temperature for Readlyn in September?
What is the average humidity in September in Readlyn?
How many days does it rain in September in Readlyn?
When it does not snow in Readlyn?
Does it snow in Readlyn in September?
What is the average length of the day in September in Readlyn?
When are sunrise and sunset in September in Readlyn?
How many hours of sunshine does Readlyn have in September?
What is the UV index intensity in September in Readlyn?
Average temperature in September
Readlyn, IA
- Average high temperature in September: 72.9°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (23.9°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (11.3°F).
Average pressure in September
Readlyn, 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
Readlyn, IA
- Average wind speed in September: 8.2mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in September
Readlyn, IA
- Average humidity in September: 78%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Readlyn, IA
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is June (4.09").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in September
Readlyn, IA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is June (17.6 days).
The month with the least rainy days is January (3.9 days).
Average snowfall in September
Readlyn, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Readlyn, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Readlyn, 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: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Readlyn, IA
- Average sunshine days in September: 16.9 days
The months with the most sunshine days are October, November and December (17.5 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in September
Readlyn, IA
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Readlyn, IA
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in September
Readlyn, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Readlyn, Iowa, USA
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