September weather forecastMcClave, CO
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in McClave, Colorado, with temperature in the range of an average high of 83.1°F (28.4°C) and an average low of 61.7°F (16.5°C).Temperature
With the onset of September, McClave's average high-temperature slightly adjusts, moderately receding from August's tropical 89.8°F (32.1°C) to a warm 83.1°F (28.4°C). McClave throughout September, experiences an average nighttime temperature of 61.7°F (16.5°C).Heat index
The average heat index in September is estimated at 82.4°F (28°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', determines the feeling of heat when you account for the relative humidity. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Humidity
The average relative humidity in September is 45%.Rainfall
In September, the rain falls for 6.5 days. Throughout September, 0.51" (13mm) of precipitation is accumulated. In McClave, during the entire year, the rain falls for 79.5 days and collects up to 8.9" (226mm) of precipitation.Snowfall
In McClave, snow does not fall in June through September.Daylight
In McClave, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:21 am and sunset at 7:20 pm. On the last day of September, in McClave, Colorado, sunrise is at 6:46 am and sunset at 6:35 pm MDT.
Sunshine
In September, the average sunshine in McClave is 10.4h.UV index
In McClave, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 5 during September translates into these guidelines:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
McClave, 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
McClave, 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
McClave, 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
McClave, 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
McClave, 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
McClave, 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
McClave, 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
McClave, 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
McClave, 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 36min).
- Average sunshine in September: 10h and 24min
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
McClave, 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
McClave, 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
McClave, 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
McClave, 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).





