September weather forecastFountain, CO
September
Weather in September
September ushers in the Fall season in Fountain, Colorado, presenting a marked weather difference from the preceding August. The month offers mild temperatures, creating an environment perfect for enjoying outdoor pursuits amid the fall foliage. However, the rainfall continues to taper off with a total of 0.83" (21mm). As the season changes, daylight hours also contract in tandem with the shorter autumn days. As one heads towards October, expect a further plunge in temperatures, leading the way to the start of early winter conditions.Temperature
With the arrival of September, Fountain experiences a modest decline in average high-temperatures, transitioning from a moderately hot 81.5°F (27.5°C) in August to a still warm 75°F (23.9°C). The average low-temperature of 52.2°F (11.2°C) in September represents a significant drop from the daily high.Humidity
In Fountain, the average relative humidity in September is 46%.Rainfall
In September, the rain falls for 10.5 days. Throughout September, 0.83" (21mm) of precipitation is accumulated. In Fountain, during the entire year, the rain falls for 121.1 days and collects up to 12.99" (330mm) of precipitation.Snowfall
In Fountain, snow does not fall in June through September.Daylight
In Fountain, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:42 pm MDT.
Sunshine
In Fountain, the average sunshine in September is 11h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 5 in September transforms into this advice:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fountain, CO
- Average high temperature in September: 75°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (39.2°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is December (21.6°F).
Average pressure in September
Fountain, CO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is April (29.9"Hg).
Average wind speed in September
Fountain, CO
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Fountain, CO
- Average humidity in September: 46%
The month with the highest relative humidity is February (63%).
The month with the lowest relative humidity is June (41%).
Average rainfall in September
Fountain, CO
- Average rainfall in September: 0.83"
The wettest month (with the highest rainfall) is July (2.2").
The driest month (with the least rainfall) is December (0.43").
Average rainfall days in September
Fountain, CO
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (4.4 days).
Average snowfall in September
Fountain, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Fountain, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (9.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Fountain, CO
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 54min).
Average sunshine days in September
Fountain, CO
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (22.4 days).
The month with the least sunshine days is July (8.9 days).
Average UV index in September
Fountain, CO
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Fountain, CO
- Average cloud cover in September: 15
The month with the most cloud cover is April (Cloud cover 25).
The months with the least cloud cover are June, September, October and November (Cloud cover 15).
Average visibility in September
Fountain, CO
- 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).
