September weather forecast
Lamar, CO

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Weather in September

September, the first month of the autumn in Lamar, is still a warm month, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 83.1°F (28.4°C).

Temperature

In Lamar, the average high-temperature in September slightly decreases from a hot 89.8°F (32.1°C) in August to a moderately hot 83.1°F (28.4°C). Lamar records an average temperature drop to a comfortable 61.7°F (16.5°C) in September.

Heat index

The heat index for September is computed to be 82.4°F (28°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

In Lamar, Colorado, the average relative humidity in September is 45%.

Rainfall

In Lamar, in September, it is raining for 6.5 days, with typically 0.51" (13mm) of accumulated precipitation. Throughout the year, in Lamar, there are 79.5 rainfall days, and 8.9" (226mm) of precipitation is accumulated.

Snowfall

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

Daylight

In Lamar, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:20 am and sunset at 7:19 pm. On the last day of September, in Lamar, sunrise is at 6:45 am and sunset at 6:34 pm MDT.

Sunshine

In September, the average sunshine is 10.4h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, a regular UV index of 5 translates into these guidelines:
Undertake protective steps - Preventing sun damage is advised. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in Lamar in September?

An average high-temperature, in September, in Lamar, is 83.1°F (28.4°C) and the average low-temperature is 61.7°F (16.5°C). The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in September is computed to be 82.4°F (28°C).

What is the average humidity in September in Lamar?

The average relative humidity in September in Lamar, Colorado, is 45%.

How much does it rain in Lamar in September?

In Lamar, in September, during 6.5 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

When it does not snow in Lamar?

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

Does it snow in Lamar in September?

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

What is the average length of the day in September in Lamar?

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

What time are sunrise and sunset in September in Lamar?

In September, on the first day of the month, sunrise is at 6:20 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:34 pm MDT.

How many hours of sunshine does Lamar have in September?

In September, the average sunshine duration is 10.4h.

What is the UV index intensity in September in Lamar?

In Lamar, Colorado, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
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
Lamar, CO

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

The warmest month (with the highest average high temperature) is July (92.7°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in September: 61.7°F

The month with the highest average low temperature is July (71.1°F).
The coldest month (with the lowest average low temperature) is December (26.4°F).

Average pressure in September
Lamar, CO

Average pressure in September - Lamar, CO
  • Average pressure in September: 29.93"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.8"Hg).

Average wind speed in September
Lamar, CO

Average wind speed in September - Lamar, CO
  • Average wind speed in September: 10.9mph

The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is January (8.9mph).

Average humidity in September
Lamar, CO

Average humidity in September - Lamar, CO
  • Average humidity in September: 45%

The month with the highest relative humidity is January (59%).
The month with the lowest relative humidity is June (40%).

Average rainfall in September
Lamar, CO

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

The wettest month (with the highest rainfall) is July (1.54").
The driest month (with the least rainfall) is November (0.28").

Average rainfall days in September
Lamar, CO

Average rainfall days in September - Lamar, CO
  • Average rainfall days in September: 6.5 days

The month with the highest number of rainy days is July (11.8 days).
The month with the least rainy days is November (2.5 days).

Average snowfall in September
Lamar, CO

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

The month with the highest snowfall is February (1.93").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Lamar, CO

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

The month with the highest number of snowfall days is February (5.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Lamar, 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 2min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).

Average sunshine days in September
Lamar, CO

Average sunshine days in September - Lamar, CO
  • Average sunshine days in September: 21.8 days

The month with the most sunshine days is November (25.2 days).
The month with the least sunshine days is July (17.3 days).

Average UV index in September
Lamar, CO

Average UV index in September - Lamar, 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
Lamar, CO

Average cloud cover in September - Lamar, CO
  • Average cloud cover in September: 14

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

Average visibility in September
Lamar, CO

Average visibility in September - Lamar, 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).

Lamar, Colorado, USA

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