September weather forecast and climate
Rifle, CO

The scenic Triple Falls of the Rifle Falls in Colorado, flowing to the still waters of the river below
The scenic Triple Falls of the Rifle Falls in Colorado, flowing to the still waters of the river below

Weather in September

The first month of the autumn, September, is also an agreeable month in Rifle, Colorado, with average temperature ranging between max 70.9°F (21.6°C) and min 43.9°F (6.6°C).

Temperature

In September, the average high-temperature marginally drops, from a warm 78.4°F (25.8°C) in August, to an agreeable 70.9°F (21.6°C). In Rifle, Colorado, the average low-temperature is 43.9°F (6.6°C).

Humidity

In Rifle, the average relative humidity is 48%.

Rainfall

The month with the least rainfall is September when the rain falls for 7.9 days and typically collects 0.51" (13mm) of precipitation.

Snowfall

In Rifle snow does not fall in June through September.

Daylight

In September, the average length of the day in Rifle is 12.4h.

Sunshine

The average sunshine in September is 11h.

UV index

In September, the average daily maximum UV index in Rifle, Colorado, is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Rifle?

In Rifle, Colorado, in September, the average high-temperature is 70.9°F (21.6°C), and the average low-temperature is 43.9°F (6.6°C).

What is the average humidity in September in Rifle?

The average relative humidity in September is 48%.

How much does it rain in Rifle in September?

In Rifle, during September, the rain falls for 7.9 days and regularly aggregates up to 0.51" (13mm) of precipitation.

What is the driest month in Rifle?

September is the month with the least rainfall in Rifle. Rain falls for 7.9 days and accumulates 0.51" (13mm) of precipitation.

Does it snow in Rifle in September?

In Rifle, Colorado, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Rifle?

June through September are months without snowfall in Rifle, Colorado.

How many hours of daylight does Rifle have in September?

The average length of the day in September in Rifle, Colorado, is 12.4h.

How many hours of sunshine does Rifle have in September?

The average sunshine in September in Rifle is 11h.

How high is the UV index in September in Rifle?

In September, the average daily maximum UV index in Rifle, Colorado, is 4. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV rays.

Average temperature in September
Rifle, CO

Average temperature in September - Rifle, CO
  • Average high temperature in September: 70.9°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in September: 43.9°F

The month with the highest average low temperature is July (50.4°F).
The coldest month (with the lowest average low temperature) is January (12°F).

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Average pressure in September
Rifle, CO

Average pressure in September - Rifle, CO
  • Average pressure in September: 30.03"

The month with the highest atmospheric pressure is January (30.27").
The month with the lowest atmospheric pressure is May (29.93").

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Average wind speed in September
Rifle, CO

Average wind speed in September - Rifle, CO
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is June (6.2mph).
The calmest month (with the lowest average wind speed) is January (4.1mph).

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Average humidity in September
Rifle, CO

Average humidity in September - Rifle, CO
  • Average humidity in September: 48%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is June (43%).

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Average rainfall in September
Rifle, CO

Average rainfall in September - Rifle, CO
  • Average rainfall in September: 0.51"

The wettest month (with the highest rainfall) is April (1.57").
The driest month (with the least rainfall) is September (0.51").

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Average rainfall days in September
Rifle, CO

Average rainfall days in September - Rifle, CO
  • Average rainfall days in September: 7.9 days

The month with the highest number of rainy days is April (14 days).
The month with the least rainy days is June (5.9 days).

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Average snowfall in September
Rifle, CO

Average snowfall in September - Rifle, CO
  • Average snowfall in September: 0"

The month with the highest snowfall is February (8.74").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Rifle, CO

Average snowfall days in September - Rifle, CO
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (13 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Rifle, CO

Average daylight in September / Average sunshine in September - Rifle, CO
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in September: 11h

Months with the most sunshine are June, July and August (Average sunshine: 11.9h).
The month with the least sunshine is January (Average sunshine: 6.1h).

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Average sunshine days in September
Rifle, CO

Average sunshine days in September - Rifle, CO
  • Average sunshine days in September: 17.7 days

The month with the most sunshine days is June (20.7 days).
The month with the least sunshine days is April (11.7 days).

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Average UV index in September
Rifle, CO

Average UV index in September - Rifle, CO
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in September
Rifle, CO

Average cloud cover in September - Rifle, CO
  • Average cloud cover in September: 12

The month with the most cloud cover is February (Cloud cover 39).
Months with the least cloud cover are June and September (Cloud cover 12).

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Average visibility in September
Rifle, CO

Average visibility in September - Rifle, CO
  • Average visibility in September: 6mi

Months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

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