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
The onset of September notes an average high-temperature of a still warm 74.1°F (23.4°C), subtly shifted from August's 79.3°F (26.3°C). An average low-temperature of 54.9°F (12.7°C) marks the month of September.Humidity
In September, the average relative humidity is 78%.Rainfall
In Bertram, Iowa, during September, the rain falls for 12 days and regularly aggregates up to 2.72" (69mm) of precipitation. In Bertram, Iowa, during the entire year, the rain falls for 147.9 days and collects up to 31.57" (802mm) of precipitation.Snowfall
In Bertram, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:39 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:48 pm CDT.
Sunshine
In Bertram, Iowa, the average sunshine in September is 9.2h.UV index
In Bertram, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What are the temperatures in Bertram in September?
What is the average humidity in September in Bertram?
How many days does it rain in September in Bertram?
When it does not snow in Bertram?
Does it snow in Bertram in September?
How many hours of daylight does Bertram have in September?
What time are sunrise and sunset in September in Bertram?
How many hours of sunshine does Bertram have in September?
How high is the UV index in September in Bertram?
Average temperature in September
Bertram, IA
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in September: 54.9°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).
Average pressure in September
Bertram, 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 (29.9"Hg).
Average wind speed in September
Bertram, IA
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in September
Bertram, IA
- Average humidity in September: 78%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Bertram, IA
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in September
Bertram, IA
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (19 days).
The months with the least rainy days are January and February (5.2 days).
Average snowfall in September
Bertram, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.79").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Bertram, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bertram, IA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 1min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Bertram, IA
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in September
Bertram, IA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Bertram, IA
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in September
Bertram, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Bertram, Iowa, USA
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