September weather forecast
Olney Springs, CO

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Olney Springs, Colorado, with an average temperature varying between 61.2°F (16.2°C) and 83.1°F (28.4°C).

Temperature

A minor decrease in the average high-temperature is observed during September, shifting from a hot 89.8°F (32.1°C) in August to a warm 83.1°F (28.4°C). During September, Olney Springs notes a substantial drop from the daytime peak to an average minimum temperature of 61.2°F (16.2°C).

Heat index

Throughout September, the heat index is calculated to be 82.4°F (28°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.
Heat index readings emphasize conditions of light breezes and shaded spots. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', quantifies the warmth felt when relative humidity is considered. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.

Humidity

In Olney Springs, the average relative humidity in September is 41%.

Rainfall

In Olney Springs, during September, the rain falls for 7.2 days and regularly aggregates up to 0.71" (18mm) of precipitation. In Olney Springs, during the entire year, the rain falls for 92.8 days and collects up to 10.67" (271mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September in Olney Springs is 12h and 25min.
On the first day of the month, sunrise is at 6:26 am and sunset at 7:24 pm. On the last day of September, in Olney Springs, sunrise is at 6:51 am and sunset at 6:39 pm MDT.

Sunshine

The average sunshine in September in Olney Springs is 10.8h.

UV index

In Olney Springs, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the maximum UV index of 5 suggests these recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Updated: Jul 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September?

During September, Olney Springs experiences an average high-temperature of 83.1°F (28.4°C) and a low-temperature of 61.2°F (16.2°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in September is calculated to be 82.4°F (28°C).

What is the average humidity in September?

In Olney Springs, the average relative humidity in September is 41%.

How many days does it rain in September?

In September, the rain falls for 7.2 days. Throughout September, 0.71" (18mm) of precipitation is accumulated.

When it does not snow?

In Olney Springs, snow does not fall in June through September.

Does it snow in Olney Springs in September?

In Olney Springs, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

The average day length in September is 12h and 25min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:26 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:39 pm MDT.

How many hours of sunshine does Olney Springs have in September?

In Olney Springs, the average sunshine duration in September is 10.8h.

How high is the UV index in September?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Olney Springs, CO

Average temperature in September - Olney Springs, CO
  • Average high temperature in September: 83.1°F

The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is December (43.5°F).

  • Average low temperature in September: 61.2°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is December (26.1°F).

Average pressure in September
Olney Springs, CO

Average pressure in September - Olney Springs, CO
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in September
Olney Springs, CO

Average wind speed in September - Olney Springs, CO
  • Average wind speed in September: 9.3mph

The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is December (7.4mph).

Average humidity in September
Olney Springs, CO

Average humidity in September - Olney Springs, CO
  • Average humidity in September: 41%

The months with the highest relative humidity are January and December (57%).
The month with the lowest relative humidity is June (36%).

Average rainfall in September
Olney Springs, CO

Average rainfall in September - Olney Springs, CO
  • Average rainfall in September: 0.71"

The wettest month (with the highest rainfall) is July (1.93").
The driest month (with the least rainfall) is November (0.35").

Average rainfall days in September
Olney Springs, CO

Average rainfall days in September - Olney Springs, CO
  • Average rainfall days in September: 7.2 days

The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is January (3.3 days).

Average snowfall in September
Olney Springs, CO

Average snowfall in September - Olney Springs, CO
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.99").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Olney Springs, CO

Average snowfall days in September - Olney Springs, CO
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Olney Springs, CO

Average daylight in September / Average sunshine in September - Olney Springs, CO
  • Average daylight in September: 12h and 2min

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 36min).

  • Average sunshine in September: 10h and 5min

The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

Average sunshine days in September
Olney Springs, CO

Average sunshine days in September - Olney Springs, CO
  • Average sunshine days in September: 19.9 days

The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is July (14.8 days).

Average UV index in September
Olney Springs, CO

Average UV index in September - Olney Springs, CO
  • Average UV index in September: 5

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 2).

Average cloud cover in September
Olney Springs, CO

Average cloud cover in September - Olney Springs, CO
  • Average cloud cover in September: 14

The months with the most cloud cover are February and April (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).

Average visibility in September
Olney Springs, CO

Average visibility in September - Olney Springs, 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).

Olney Springs, Colorado, USA

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