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
Galva's September weather features a light decline in high-temperatures, reducing from 79.5°F (26.4°C) in August to a still warm 73.9°F (23.3°C). Throughout September, Galva witnesses a nighttime temperature average of 55.4°F (13°C).Humidity
The average relative humidity in September in Galva is 74%.Rainfall
In Galva, in September, it is raining for 11.9 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, in Galva, there are 117.4 rainfall days, and 24.61" (625mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Galva, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:47 am and sunset at 7:55 pm. On the last day of September, in Galva, sunrise is at 7:18 am and sunset at 7:04 pm CDT.
Sunshine
The average sunshine in September is 8.9h.UV index
In Galva, Iowa, 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 exposure to the Sun's UV rays for ordinary individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Galva in September?
What is the average humidity in September in Galva?
How many days does it rain in September in Galva?
When it does not snow in Galva?
Does it snow in Galva in September?
How many hours of daylight does Galva have in September?
What time are sunrise and sunset in September in Galva?
How long on average sun shines in September in Galva?
What is the UV index intensity in September in Galva?
Average temperature in September
Galva, IA
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in September
Galva, IA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Galva, IA
- Average wind speed in September: 8.9mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in September
Galva, IA
- Average humidity in September: 74%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and October (67%).
Average rainfall in September
Galva, IA
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in September
Galva, IA
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is June (16.4 days).
The month with the least rainy days is February (2.5 days).
Average snowfall in September
Galva, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.37").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Galva, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Galva, 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 6min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Galva, IA
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Galva, 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 and February (UV index 1).
Average cloud cover in September
Galva, IA
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Galva, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Galva, Iowa, USA
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