Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The start of September signals a gentle decrease in the average high-temperature, transitioning from 84.4°F (29.1°C) in August to a still warm 77.7°F (25.4°C). A pronounced dip becomes evident during the nights in September as Castlewood logs a consistent average temperature of 52.5°F (11.4°C).Humidity
The months with the lowest humidity in Castlewood are June, August and September, with an average relative humidity of 43%.Rainfall
September is the month with the least rainfall in Castlewood. Rain falls for 6.5 days and accumulates 0.47" (12mm) of precipitation.Snowfall
June through September are months without snowfall in Castlewood.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:28 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm MDT.
Sunshine
In Castlewood, the average sunshine in September is 11h.UV index
In September, the average daily maximum UV index in Castlewood is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Frequently asked questions
What is the average September temperature in Castlewood?
What is the least humid month in Castlewood?
What is the average humidity in September in Castlewood?
What is the driest month in Castlewood?
How many days does it rain in September in Castlewood?
When it does not snow in Castlewood?
Does it snow in Castlewood in September?
How many hours of daylight does Castlewood have in September?
When are sunrise and sunset in September in Castlewood?
How long on average sun shines in September in Castlewood?
What is the UV index intensity in September in Castlewood?
Average temperature in September
Castlewood, CO
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (40.3°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).
Average pressure in September
Castlewood, CO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).
Average wind speed in September
Castlewood, CO
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest months (with the lowest average wind speed) are August and December (6.5mph).
Average humidity in September
Castlewood, CO
- Average humidity in September: 43%
The month with the highest relative humidity is February (65%).
The months with the lowest relative humidity are June, August and September (43%).
Average rainfall in September
Castlewood, CO
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in September
Castlewood, CO
- Average rainfall days in September: 6.5 days
The month with the highest number of rainy days is May (14.2 days).
The month with the least rainy days is November (3.4 days).
Average snowfall in September
Castlewood, CO
- Average snowfall in September: 0"
The month with the highest snowfall is April (6.34").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Castlewood, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Castlewood, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 11h and 0min
The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).
Average sunshine days in September
Castlewood, CO
- Average sunshine days in September: 21 days
The month with the most sunshine days is November (23.2 days).
The month with the least sunshine days is April (12.7 days).
Average UV index in September
Castlewood, CO
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Castlewood, CO
- Average cloud cover in September: 15
The month with the most cloud cover is April (Cloud cover 26).
The months with the least cloud cover are June and September (Cloud cover 15).
Average visibility in September
Castlewood, 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).
Castlewood, Colorado, USA
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