September weather forecast
Rawlins, WY

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Weather in September

Fall claims Rawlins in September, leading to comfortably warm days and cool, breezy evenings. While the rainfall increases to reach 0.47" (12mm), the maximum temperature drops, hinting at the beginning of the cool period. September serves as a transition between the hot August and noticeably chillier October. This month signals the trees to don their autumn colors, creating a mesmerizing canvas. Rawlins in September is a perfect picture of fall landscapes.

Temperature

September witnesses a gentle descent in average high-temperature, descending from August's warm 79°F (26.1°C) to an agreeable 70.2°F (21.2°C). The nighttime temperature in Rawlins, during September, averages of 49.6°F (9.8°C).

Humidity

In Rawlins, the average relative humidity in September is 38%.

Rainfall

In September, in Rawlins, Wyoming, the rain falls for 7 days. Throughout September, 0.47" (12mm) of precipitation is accumulated. Throughout the year, in Rawlins, there are 81.7 rainfall days, and 9.72" (247mm) of precipitation is accumulated.

Snowfall

In Rawlins, snow does not fall in June through September.

Daylight

The average length of the day in September in Rawlins is 12h and 28min.
On the first day of the month, sunrise is at 6:35 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:51 pm MDT.

Sunshine

In September, the average sunshine in Rawlins is 11.1h.

UV index

In Rawlins, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature in Rawlins?

The average high-temperature and low-temperature during September are 70.2°F (21.2°C) and 49.6°F (9.8°C) respectively.

What is the average humidity in September in Rawlins?

In September, the average relative humidity is 38%.

How many days does it rain in September in Rawlins?

In Rawlins, during September, the rain falls for 7 days and regularly aggregates up to 0.47" (12mm) of precipitation.

When it does not snow in Rawlins?

June through September are months without snowfall in Rawlins, Wyoming.

Does it snow in Rawlins in September?

In Rawlins, Wyoming, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Rawlins have in September?

In September, the average day length is 12h and 28min.

When is the sunrise / sunset in September in Rawlins?

In September, on the first day of the month, sunrise is at 6:35 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:51 pm MDT.

How many hours of sunshine does Rawlins have in September?

In Rawlins, Wyoming, the average sunshine duration in September is 11.1h.

How high is the UV index in September in Rawlins?

In September, the average daily maximum UV index in Rawlins is 4. A UV Index 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
Rawlins, WY

Average temperature in September - Rawlins, WY
  • Average high temperature in September: 70.2°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is December (26.4°F).

  • Average low temperature in September: 49.6°F

The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).

Average pressure in September
Rawlins, WY

Average pressure in September - Rawlins, WY
  • Average pressure in September: 29.98"Hg

The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in September
Rawlins, WY

Average wind speed in September - Rawlins, WY
  • Average wind speed in September: 10.6mph

The windiest month (with the highest average wind speed) is November (13.2mph).
The calmest months (with the lowest average wind speed) are July and August (9.5mph).

Average humidity in September
Rawlins, WY

Average humidity in September - Rawlins, WY
  • Average humidity in September: 38%

The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are July and August (35%).

Average rainfall in September
Rawlins, WY

Average rainfall in September - Rawlins, WY
  • Average rainfall in September: 0.47"

The wettest month (with the highest rainfall) is April (1.42").
The driest month (with the least rainfall) is August (0.35").

Average rainfall days in September
Rawlins, WY

Average rainfall days in September - Rawlins, WY
  • Average rainfall days in September: 7 days

The month with the highest number of rainy days is May (11.7 days).
The month with the least rainy days is November (3.2 days).

Average snowfall in September
Rawlins, WY

Average snowfall in September - Rawlins, WY
  • Average snowfall in September: 0"

The month with the highest snowfall is April (5.75").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Rawlins, WY

Average snowfall days in September - Rawlins, WY
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is February (14.6 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in September /
Average sunshine in September
Rawlins, WY

Average daylight in September / Average sunshine in September - Rawlins, WY
  • 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 12min).

  • Average sunshine in September: 11h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).

Average sunshine days in September
Rawlins, WY

Average sunshine days in September - Rawlins, WY
  • Average sunshine days in September: 19.5 days

The month with the most sunshine days is June (21.1 days).
The month with the least sunshine days is February (11.2 days).

Average UV index in September
Rawlins, WY

Average UV index in September - Rawlins, WY
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in September
Rawlins, WY

Average cloud cover in September - Rawlins, WY
  • Average cloud cover in September: 13

The month with the most cloud cover is February (Cloud cover 45).
The months with the least cloud cover are August and September (Cloud cover 13).

Average visibility in September
Rawlins, WY

Average visibility in September - Rawlins, WY
  • Average visibility in September: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).

Rawlins, Wyoming, USA

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