September weather forecastHolland, IA
September
Weather in September
The first month of the autumn, September, is still a warm month in Holland, Iowa, with an average temperature ranging between min 54.5°F (12.5°C) and max 73.4°F (23°C).Temperature
The advent of September brings an average high-temperature of a still warm 73.4°F (23°C), almost identical to the preceding month. An average low-temperature of 54.5°F (12.5°C) is observed during September nights.Humidity
In Holland, the average relative humidity in September is 78%.Rainfall
In Holland, Iowa, during September, the rain falls for 11.9 days and regularly aggregates up to 2.32" (59mm) of precipitation. In Holland, during the entire year, the rain falls for 137.9 days and collects up to 28.62" (727mm) of precipitation.Snowfall
In Holland, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:53 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Holland, IA
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (24.8°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in September
Holland, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Holland, IA
- Average wind speed in September: 8.3mph
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 (7.1mph).
Average humidity in September
Holland, IA
- Average humidity in September: 78%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Holland, IA
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is January (1.02").
Average rainfall days in September
Holland, IA
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in September
Holland, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.92").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Holland, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Holland, IA
- Average daylight in September: 12h and 30min
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 6min).
- Average sunshine in September: 9h and 18min
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 54min).
Average sunshine days in September
Holland, IA
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in September
Holland, 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
Holland, 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
Holland, 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).
