September weather forecastGarwin, IA
September
Weather in September
September, the first month of the autumn in Garwin, is also a moderately hot month, with an average temperature varying between 74.5°F (23.6°C) and 54.7°F (12.6°C).Temperature
Garwin experiences a transition to a still warm 74.5°F (23.6°C) in average high-temperatures with the arrival of September, not greatly differing from August's 79.5°F (26.4°C). Throughout the month of September, Garwin reports a steady low-temperature average of 54.7°F (12.6°C).Humidity
In Garwin, Iowa, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 11.6 days. Throughout September, 2.64" (67mm) of precipitation is accumulated. In Garwin, during the entire year, the rain falls for 133.1 days and collects up to 27.76" (705mm) of precipitation.Snowfall
June through September are months without snowfall in Garwin.Daylight
In Garwin, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:37 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:53 pm CDT.
Sunshine
The average sunshine in September in Garwin, Iowa, is 9.1h.UV index
The average daily maximum UV index in September in Garwin is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Garwin, IA
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in September: 54.7°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 (13.5°F).
Average pressure in September
Garwin, 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
Garwin, IA
- Average wind speed in September: 8.3mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Garwin, 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 (72%).
Average rainfall in September
Garwin, IA
- Average rainfall in September: 2.64"
The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in September
Garwin, IA
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in September
Garwin, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Garwin, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Garwin, 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 12min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Garwin, IA
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Garwin, IA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
Garwin, IA
- Average cloud cover in September: 32
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 32).
Average visibility in September
Garwin, 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).
